Eucommia ulmoides Oliver is a native plant and valuable tonic Chinese medicine in China with a long history,great economic value and comprehensive development potential.Traditionally,the comprehensive utilization rate...Eucommia ulmoides Oliver is a native plant and valuable tonic Chinese medicine in China with a long history,great economic value and comprehensive development potential.Traditionally,the comprehensive utilization rate of E.ulmoides Oliv.is still very low,only bark has been used as medicine and other parts of Eucommia ulmoides Oliv.cannot be fully utilized,even the leaves have been well utilized in food products in Japan in the past decades.In order to improve the comprehensive utilization efficiency of E.ulmoides Oliv.,in this review,we summarized the varieties and contents of main active compounds,biological functions and pharmacological effects in different parts of E.ulmoides Oliv.The findings suggest that other parts of E.ulmoides Oliv.could replace the bark of E.ulmoides Oliv.to some extent besides of their respective applications.The unique and extensive physiological functions between different parts of E.ulmoides Oliv.indicate that the comprehensive utilization of E.ulmoides Oliv.has a wide space to develop,which is also an effective way to protect E.ulmoides Oliv.resources and improve its the utilization rate.展开更多
Based on practical situation of rare earth industrial chain,production process and rare earth materials that could produce solid wastes on batch were discussed.Formation cause,formation volume,composition analysis and...Based on practical situation of rare earth industrial chain,production process and rare earth materials that could produce solid wastes on batch were discussed.Formation cause,formation volume,composition analysis and comprehensive utilization of the solid wastes of rare earth hydrometallurgy slag,electrolysis slag,Fe-based rare earth permanent magnetic materials,Co-based rare earth permanent magnetic materials,rare earth hydrogen storage materials,rare earth polishing powders and rare earth catalysts were comprehensively introduced.Besides,some suggestions on treatment and administration on rare earth solid wastes were put forward.展开更多
Jointly published by 14 Department headed by Standardization Administraion ofChina(SAC)
Subtitle: China will formulate and reformulate 926 standards for energy conservation and comprehensive utilization durin... Jointly published by 14 Department headed by Standardization Administraion ofChina(SAC)
Subtitle: China will formulate and reformulate 926 standards for energy conservation and comprehensive utilization during 2005 and 2007.……展开更多
Herbal extraction residues(HERs)cause serious environmental pollution and resource waste.In this study,a novel green route was designed for the comprehensive reutilization of all components in HERs,taking Magnolia off...Herbal extraction residues(HERs)cause serious environmental pollution and resource waste.In this study,a novel green route was designed for the comprehensive reutilization of all components in HERs,taking Magnolia officinalis residues(MOR)as an example.The reluctant structure of MOR was first destroyed by alkali pretreatment to release the functional ingredients(magnolol and honokiol)originally remaining in MOR and to make MOR more accessible for hydrolysis.A metal–organic frame material MIL-101(Cr)with a maximum absorption capacity of 255.64 mg g^(-1)was synthesized to absorb the released honokiol and magnolol from the pretreated MOR solutions,and 40 g L^(-1)reducing sugars were obtained with 81.8%enzymatic hydrolysis rate at 10%MOR solid loading.Finally,382 mg L-1β-amyrin was produced from MOR hydrolysates by an engineered yeast strain.In total,1 kg honokiol,8 kg magnolol,and 7.64 kg β-amyrin could produce from 1 ton MOR by this cleaner process with a total economic output of 170,700 RMB.展开更多
The comprehensive use and efficient management of straw are significant for agriculture's green and low carbon transformation.This paper uses literature research and comparative analysis to systematically review t...The comprehensive use and efficient management of straw are significant for agriculture's green and low carbon transformation.This paper uses literature research and comparative analysis to systematically review the literature on comprehensive straw utilization and governance policy research in China over the past five years.The current literature has explored two major directions:regional and industrial policies and the main actors involved in the comprehensive use of straw.The research is complementary and fruitful concerning both micro and macro perspectives;however,the extant literature suffers from a lack of attention to straw intermediaries and enterprises and a lack of research across time.Therefore,this paper provides an outlook for future research.In the future,scholars should pay more attention to straw intermediaries and enterprises,conduct continuous observations of multiple regions over time to obtain panel data,and further test the heterogeneity of factors to obtain more scientific and valid results.展开更多
To relieve the shortage of oil,exploration of oil shale attracts increasingly attention from different countries,especially in China.Facing with the disadvantages of conventional oil shale retorting technology,more an...To relieve the shortage of oil,exploration of oil shale attracts increasingly attention from different countries,especially in China.Facing with the disadvantages of conventional oil shale retorting technology,more and more attention has been paid to the comprehensive utilization of oil shale for utilizing oil shale efficiently and in an environment-friendly manner.However,there are few systematic studies on comprehensive utilization of oil shale.Thus,this paper is focused on establishing the complete mathematical model of an oil shale comprehensive utilization process with solid heat carrier technology(OSCU-SHC).Moreover,its techno-economic performance is analyzed and compared to a conventional oil shale retorting process with solid heat carrier(OSRSHC).Several key parameters are investigated and optimized during the simulation process.For example,the optimal retorting temperature is set to 500℃.The comparison results show that the OSCU-SHC process has better techno-economic performance since it increases the exergy efficiency by 9.26%,total income by 29.02%,and return on investment by 4.85%.展开更多
To realize the resource utilization of the valuable metals in the titanium-containing blast furnace slag,the process route of “hydrochloric acid leaching-electrolysis-carbonization and carbon dioxide capture-preparat...To realize the resource utilization of the valuable metals in the titanium-containing blast furnace slag,the process route of “hydrochloric acid leaching-electrolysis-carbonization and carbon dioxide capture-preparation of calcium carbonate” was proposed.In this study,the influences of process conditions on the leaching rates of calcium,magnesium,aluminum,and iron and the phases of the leaching residue were investigated for the leaching process.The experimental results show that the HCl solution could selectively leach the elements from the titanium-containing blast furnace slag.The better leaching conditions are the HCl solution concentration of 4 mol/L,the leaching time of 30 min,the ratio of liquid volume to solid gas of 10 mL/g,and the stirring paddle speed of 300 r/min.Under the conditions,the leaching rates of calcium,magnesium,aluminum,and iron can reach 85.87%,73.41%,81.35%,and 59.08%,and the leaching rate of titanium is 10.71%.The iron and the aluminum are removed from the leachate to obtain iron-aluminum water purification agents,and the magnesium is removed from the leachate to obtain magnesium hydroxide.The leaching residue phase is dominated by perovskite,followed by magnesium silicate and tricalcium aluminate,and the titaniumrich material could be obtained from the leaching residue by desiliconization.展开更多
Lithium production in China mainly depends on hard rock lithium ores,which has a defect in resources,environment,and economy compared with extracting lithium from brine.This paper focuses on the research progress of e...Lithium production in China mainly depends on hard rock lithium ores,which has a defect in resources,environment,and economy compared with extracting lithium from brine.This paper focuses on the research progress of extracting lithium from spodumene,lepidolite,petalite,and zinnwaldite by acid,alkali,salt roasting,and chlorination methods,and analyzes the resource intensity,environmental impact,and production cost of industrial lithium extraction from spodumene and lepidolite.It is found that the sulfuric acid method has a high lithium recovery rate,but with a complicated process and high energy consumption;alkali and chlorination methods can directly react with lithium ores,reducing energy consumption,but need to optimize reaction conditions and safety of equipment and operation;the salt roasting method has large material flux and high energy consumption,so require adjustment of sulfate ratio to increase the lithium yield and reduce production cost.Compared with extracting lithium from brine,extracting lithium from ores,calcination,roasting,purity,and other processes consume more resources and energy;and its environmental impact mainly comes from the pollutants discharged by fossil energy,9.3-60.4 times that of lithium extracted from brine.The processing cost of lithium extraction from lepidolite by sulfate roasting method is higher than that from spodumene by sulfuric acid due to the consumption of high-value sulfate.However,the production costs of both are mainly affected by the price of lithium ores,which is less competitive than that of extracting lithium from brine.Thus,the process of extracting lithium from ores should develop appropriate technology,shorten the process flow,save resources and energy,and increase the recovery rate of related elements to reduce environmental impact and improve the added value of by-products and the economy of the process.展开更多
Straw is a general term for the stem and leaf parts of mature crops,and is a multi-purpose renewable biomass energy resource in the agricultural ecosystem.The prospect of comprehensive utilization of straw has become ...Straw is a general term for the stem and leaf parts of mature crops,and is a multi-purpose renewable biomass energy resource in the agricultural ecosystem.The prospect of comprehensive utilization of straw has become broad with the development of agricultural production,the advancement of science and technology,and the improvement of the level of agricultural mechanization.The comprehensive utilization of straw plays an important role in enhancing the sustainable development ability of agricultural economy and improving the current situation of comprehensive utilization of agricultural resources in my country.This paper briefly combs the development history of straw and the prospect and current situation of comprehensive utilization,and expounds the separation technology of straw components,straw man-made panels,straw concrete,straw returning technology and oyster mushroom cultivation.It focuses on the description of the component separation technology of straw and the manufacturing process of straw-based panels.The different separation methods and separation effects of cellulose,hemicellulose and lignin were introduced in detail,and the static yield strength(MOR),internal bonding strength(IB)and water absorption thickness of several common straw-based panels were compared and studied(TS).Finally,it summarizes the benefit analysis of the comprehensive utilization of straw by scholars from the perspective of economics,and summarizes the corresponding measures based on their own views.展开更多
The Ironmaking Plant of Tangshan Iron & Steel Co.Ltd.takes clean production as its orientation. It decreases silicon to smelt through increasing the entering furnace sinter ratio,stabilizing coke quality by tackli...The Ironmaking Plant of Tangshan Iron & Steel Co.Ltd.takes clean production as its orientation. It decreases silicon to smelt through increasing the entering furnace sinter ratio,stabilizing coke quality by tackling key problems,increasing coal injection ratio,as well as keeping the blast furnace smooth running and so on.The energy consumption of sinter working procedure has been greatly reduced through optimizing the ore blender structure,enhancing the quality of fuel and flux,increasing the quicklime amount,reclaiming the remaining heat of the annulus cooling system and deepening the material layer to sinter.We have achieved the repetition economy and the secondly resource has been used synthetically with advanced producing technics.The environment around the plant has been greatly improved by preventing,monitoring and fathering the moving pollution root,at the same time,the economy and environment development in phase has been greatly accelerated.展开更多
A brief introduction to Baosteel’s steelmaking plant,the increase of its crude steel output and development of its product variety in the past 25 years is given in this paper.The technical progress in hot metal pretr...A brief introduction to Baosteel’s steelmaking plant,the increase of its crude steel output and development of its product variety in the past 25 years is given in this paper.The technical progress in hot metal pretreatment,converter,secondary refining,continuous casting,comprehensive utilization of resources and environmental protection is also introduced.The present situation and level of the technologies,such as production of clean steel,RH vacuum refining,breakout prediction system of slab continuous casting, electromagnetic stirring and slag treatment by a rotary cylinder at Baosteel are described as well.These technologies provided good conditions for developing high value-added products and comprehensive utilization of resources at Baosteel.The future development trend of steelmaking technology of Baosteel is proposed.展开更多
Water supply project of drawing from the Songhua River in central cities of Jilin is taken as research object.On the basis of analyzing project characteristics and natural conditions of the project area,site selection...Water supply project of drawing from the Songhua River in central cities of Jilin is taken as research object.On the basis of analyzing project characteristics and natural conditions of the project area,site selection of waste slag yard of water diversion project and design of water and soil conservation measures are discussed.Rationality of site selection of waste slag yard and pertinence of prevention and control measures of water and soil loss in waste slag yard are analyzed,and comprehensive utilization of waste slag in large-scale production and construction projects is explored.展开更多
The ceramsite was prepared by using Bayan Obo tailings and blast furnace slag of Baotou Steel as the main raw materials and coal gangue as pore-forming agent,and the process system and the performance of ceramsite wer...The ceramsite was prepared by using Bayan Obo tailings and blast furnace slag of Baotou Steel as the main raw materials and coal gangue as pore-forming agent,and the process system and the performance of ceramsite were optimized.The phase transformation rules of the ceramsite prepared by multi-source solid waste in sintering method were clarified.The influence of sintering process parameters on ceramsite performance and the purification effect of ceramsite on ammonia nitrogen wastewater were revealed.The results show that the reasonable proportion of raw materials for preparing ceramsite is 60%tailings,35%blast furnace slag and 5%coal gangue.The reasonable preparation process of ceramsite is preheating at 350℃ for 12 min,increasing the temperature to 750℃ and holding for 60 min,then increasing the temperature to 1130℃ and roasting for 20 min.The cooling method is to cool down with the furnace.The prepared ceramsite has compressive strength of 1.89 MPa,porosity of 51.31%,water absorption of 31.42%,and bulk density of 1.94 g/cm^(3).When the ceramsite is used to treat ammonia nitrogen wastewater,the removal rate of ammonia nitrogen is 47.33%.展开更多
Xinjiang is an important area connecting China with other Central Asian countries and a strategic location for safeguarding national security.Its economic development is the core and key of China’s“the Belt and Road...Xinjiang is an important area connecting China with other Central Asian countries and a strategic location for safeguarding national security.Its economic development is the core and key of China’s“the Belt and Road Initiative”strategy.However,there are existing problems in Xinjiang,such as water resource shortages,agricultural inefficiency,increasing desertification,and an imbalance in regional economic development.In response to these problems,the project team innovatively proposed a strategic concept of using energy to develop modem agriculture facilities in Xinjiang to control desertification.The Xinjiang Energy-Based Desert Management Project is guided by the concept of ecological civilization,and the promotion of Xinjiang’s desert governance system and modernization of governance capacity.展开更多
基金the National Key Research and Development Plan,China(2016YFD0400203-4).
文摘Eucommia ulmoides Oliver is a native plant and valuable tonic Chinese medicine in China with a long history,great economic value and comprehensive development potential.Traditionally,the comprehensive utilization rate of E.ulmoides Oliv.is still very low,only bark has been used as medicine and other parts of Eucommia ulmoides Oliv.cannot be fully utilized,even the leaves have been well utilized in food products in Japan in the past decades.In order to improve the comprehensive utilization efficiency of E.ulmoides Oliv.,in this review,we summarized the varieties and contents of main active compounds,biological functions and pharmacological effects in different parts of E.ulmoides Oliv.The findings suggest that other parts of E.ulmoides Oliv.could replace the bark of E.ulmoides Oliv.to some extent besides of their respective applications.The unique and extensive physiological functions between different parts of E.ulmoides Oliv.indicate that the comprehensive utilization of E.ulmoides Oliv.has a wide space to develop,which is also an effective way to protect E.ulmoides Oliv.resources and improve its the utilization rate.
文摘Based on practical situation of rare earth industrial chain,production process and rare earth materials that could produce solid wastes on batch were discussed.Formation cause,formation volume,composition analysis and comprehensive utilization of the solid wastes of rare earth hydrometallurgy slag,electrolysis slag,Fe-based rare earth permanent magnetic materials,Co-based rare earth permanent magnetic materials,rare earth hydrogen storage materials,rare earth polishing powders and rare earth catalysts were comprehensively introduced.Besides,some suggestions on treatment and administration on rare earth solid wastes were put forward.
文摘 Jointly published by 14 Department headed by Standardization Administraion ofChina(SAC)
Subtitle: China will formulate and reformulate 926 standards for energy conservation and comprehensive utilization during 2005 and 2007.……
基金supported by the National Key Research and Development Project(2019YFC1906601)China the Scientific and Technological Innovation Project of the Chinese Academy of Chinese Medical Sciences(C12021A04111)the Fundamental Research Funds for the Central Public Welfare Research Institutes(ZZ13-YQ-040).
文摘Herbal extraction residues(HERs)cause serious environmental pollution and resource waste.In this study,a novel green route was designed for the comprehensive reutilization of all components in HERs,taking Magnolia officinalis residues(MOR)as an example.The reluctant structure of MOR was first destroyed by alkali pretreatment to release the functional ingredients(magnolol and honokiol)originally remaining in MOR and to make MOR more accessible for hydrolysis.A metal–organic frame material MIL-101(Cr)with a maximum absorption capacity of 255.64 mg g^(-1)was synthesized to absorb the released honokiol and magnolol from the pretreated MOR solutions,and 40 g L^(-1)reducing sugars were obtained with 81.8%enzymatic hydrolysis rate at 10%MOR solid loading.Finally,382 mg L-1β-amyrin was produced from MOR hydrolysates by an engineered yeast strain.In total,1 kg honokiol,8 kg magnolol,and 7.64 kg β-amyrin could produce from 1 ton MOR by this cleaner process with a total economic output of 170,700 RMB.
基金the financial support from the National Natural Science Foundation of China[Grant number.72074183]the Humanities and Social Science Foundation of Chinese Ministry of Education[Grant number.20YJC630104]the National Social Science Foundation of China[Grant number.18ZDA052].
文摘The comprehensive use and efficient management of straw are significant for agriculture's green and low carbon transformation.This paper uses literature research and comparative analysis to systematically review the literature on comprehensive straw utilization and governance policy research in China over the past five years.The current literature has explored two major directions:regional and industrial policies and the main actors involved in the comprehensive use of straw.The research is complementary and fruitful concerning both micro and macro perspectives;however,the extant literature suffers from a lack of attention to straw intermediaries and enterprises and a lack of research across time.Therefore,this paper provides an outlook for future research.In the future,scholars should pay more attention to straw intermediaries and enterprises,conduct continuous observations of multiple regions over time to obtain panel data,and further test the heterogeneity of factors to obtain more scientific and valid results.
基金the National Basic Research Program,China(2014CB744306)the Fundamental Research Funds for the Central Universities,China(No.JZ2018HGTA0278)+1 种基金the National Natural Science Foundation of China,China(No.51472070)the Hefei University of Technology projects,China(No.407-0371000045).
文摘To relieve the shortage of oil,exploration of oil shale attracts increasingly attention from different countries,especially in China.Facing with the disadvantages of conventional oil shale retorting technology,more and more attention has been paid to the comprehensive utilization of oil shale for utilizing oil shale efficiently and in an environment-friendly manner.However,there are few systematic studies on comprehensive utilization of oil shale.Thus,this paper is focused on establishing the complete mathematical model of an oil shale comprehensive utilization process with solid heat carrier technology(OSCU-SHC).Moreover,its techno-economic performance is analyzed and compared to a conventional oil shale retorting process with solid heat carrier(OSRSHC).Several key parameters are investigated and optimized during the simulation process.For example,the optimal retorting temperature is set to 500℃.The comparison results show that the OSCU-SHC process has better techno-economic performance since it increases the exergy efficiency by 9.26%,total income by 29.02%,and return on investment by 4.85%.
基金Funded by the National Natural Science Foundation of China Youth Fund(No.52204419)the Liaoning Provincial Natural Science Foundation(No.2022-BS-076)the Guangxi Science and Technology Major Project(No.2021AA12013)。
文摘To realize the resource utilization of the valuable metals in the titanium-containing blast furnace slag,the process route of “hydrochloric acid leaching-electrolysis-carbonization and carbon dioxide capture-preparation of calcium carbonate” was proposed.In this study,the influences of process conditions on the leaching rates of calcium,magnesium,aluminum,and iron and the phases of the leaching residue were investigated for the leaching process.The experimental results show that the HCl solution could selectively leach the elements from the titanium-containing blast furnace slag.The better leaching conditions are the HCl solution concentration of 4 mol/L,the leaching time of 30 min,the ratio of liquid volume to solid gas of 10 mL/g,and the stirring paddle speed of 300 r/min.Under the conditions,the leaching rates of calcium,magnesium,aluminum,and iron can reach 85.87%,73.41%,81.35%,and 59.08%,and the leaching rate of titanium is 10.71%.The iron and the aluminum are removed from the leachate to obtain iron-aluminum water purification agents,and the magnesium is removed from the leachate to obtain magnesium hydroxide.The leaching residue phase is dominated by perovskite,followed by magnesium silicate and tricalcium aluminate,and the titaniumrich material could be obtained from the leaching residue by desiliconization.
基金financially supported by the National Natural Science Foundation of China(71991484,41971265,72088101,and 71991480)the National Key R&D program of China(2021YFC2901801)。
文摘Lithium production in China mainly depends on hard rock lithium ores,which has a defect in resources,environment,and economy compared with extracting lithium from brine.This paper focuses on the research progress of extracting lithium from spodumene,lepidolite,petalite,and zinnwaldite by acid,alkali,salt roasting,and chlorination methods,and analyzes the resource intensity,environmental impact,and production cost of industrial lithium extraction from spodumene and lepidolite.It is found that the sulfuric acid method has a high lithium recovery rate,but with a complicated process and high energy consumption;alkali and chlorination methods can directly react with lithium ores,reducing energy consumption,but need to optimize reaction conditions and safety of equipment and operation;the salt roasting method has large material flux and high energy consumption,so require adjustment of sulfate ratio to increase the lithium yield and reduce production cost.Compared with extracting lithium from brine,extracting lithium from ores,calcination,roasting,purity,and other processes consume more resources and energy;and its environmental impact mainly comes from the pollutants discharged by fossil energy,9.3-60.4 times that of lithium extracted from brine.The processing cost of lithium extraction from lepidolite by sulfate roasting method is higher than that from spodumene by sulfuric acid due to the consumption of high-value sulfate.However,the production costs of both are mainly affected by the price of lithium ores,which is less competitive than that of extracting lithium from brine.Thus,the process of extracting lithium from ores should develop appropriate technology,shorten the process flow,save resources and energy,and increase the recovery rate of related elements to reduce environmental impact and improve the added value of by-products and the economy of the process.
基金supported by the National Natural Science Foundation of China(Nos.51878354&51308301)the Natural Science Foundation of Jiangsu Province(Nos.BK20181402&BK20130978)Qinglan Project of Jiangsu Higher Education Institutions.
文摘Straw is a general term for the stem and leaf parts of mature crops,and is a multi-purpose renewable biomass energy resource in the agricultural ecosystem.The prospect of comprehensive utilization of straw has become broad with the development of agricultural production,the advancement of science and technology,and the improvement of the level of agricultural mechanization.The comprehensive utilization of straw plays an important role in enhancing the sustainable development ability of agricultural economy and improving the current situation of comprehensive utilization of agricultural resources in my country.This paper briefly combs the development history of straw and the prospect and current situation of comprehensive utilization,and expounds the separation technology of straw components,straw man-made panels,straw concrete,straw returning technology and oyster mushroom cultivation.It focuses on the description of the component separation technology of straw and the manufacturing process of straw-based panels.The different separation methods and separation effects of cellulose,hemicellulose and lignin were introduced in detail,and the static yield strength(MOR),internal bonding strength(IB)and water absorption thickness of several common straw-based panels were compared and studied(TS).Finally,it summarizes the benefit analysis of the comprehensive utilization of straw by scholars from the perspective of economics,and summarizes the corresponding measures based on their own views.
文摘The Ironmaking Plant of Tangshan Iron & Steel Co.Ltd.takes clean production as its orientation. It decreases silicon to smelt through increasing the entering furnace sinter ratio,stabilizing coke quality by tackling key problems,increasing coal injection ratio,as well as keeping the blast furnace smooth running and so on.The energy consumption of sinter working procedure has been greatly reduced through optimizing the ore blender structure,enhancing the quality of fuel and flux,increasing the quicklime amount,reclaiming the remaining heat of the annulus cooling system and deepening the material layer to sinter.We have achieved the repetition economy and the secondly resource has been used synthetically with advanced producing technics.The environment around the plant has been greatly improved by preventing,monitoring and fathering the moving pollution root,at the same time,the economy and environment development in phase has been greatly accelerated.
文摘A brief introduction to Baosteel’s steelmaking plant,the increase of its crude steel output and development of its product variety in the past 25 years is given in this paper.The technical progress in hot metal pretreatment,converter,secondary refining,continuous casting,comprehensive utilization of resources and environmental protection is also introduced.The present situation and level of the technologies,such as production of clean steel,RH vacuum refining,breakout prediction system of slab continuous casting, electromagnetic stirring and slag treatment by a rotary cylinder at Baosteel are described as well.These technologies provided good conditions for developing high value-added products and comprehensive utilization of resources at Baosteel.The future development trend of steelmaking technology of Baosteel is proposed.
文摘Water supply project of drawing from the Songhua River in central cities of Jilin is taken as research object.On the basis of analyzing project characteristics and natural conditions of the project area,site selection of waste slag yard of water diversion project and design of water and soil conservation measures are discussed.Rationality of site selection of waste slag yard and pertinence of prevention and control measures of water and soil loss in waste slag yard are analyzed,and comprehensive utilization of waste slag in large-scale production and construction projects is explored.
基金supported by the National Key Research and Development Program of China(2020YFC1909100 and 2020YFC1909105)the Major Science and Technology Project of Inner Mongolia Autonomous Region(2021ZD0016)the Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region(NJYT22060)。
文摘The ceramsite was prepared by using Bayan Obo tailings and blast furnace slag of Baotou Steel as the main raw materials and coal gangue as pore-forming agent,and the process system and the performance of ceramsite were optimized.The phase transformation rules of the ceramsite prepared by multi-source solid waste in sintering method were clarified.The influence of sintering process parameters on ceramsite performance and the purification effect of ceramsite on ammonia nitrogen wastewater were revealed.The results show that the reasonable proportion of raw materials for preparing ceramsite is 60%tailings,35%blast furnace slag and 5%coal gangue.The reasonable preparation process of ceramsite is preheating at 350℃ for 12 min,increasing the temperature to 750℃ and holding for 60 min,then increasing the temperature to 1130℃ and roasting for 20 min.The cooling method is to cool down with the furnace.The prepared ceramsite has compressive strength of 1.89 MPa,porosity of 51.31%,water absorption of 31.42%,and bulk density of 1.94 g/cm^(3).When the ceramsite is used to treat ammonia nitrogen wastewater,the removal rate of ammonia nitrogen is 47.33%.
文摘Xinjiang is an important area connecting China with other Central Asian countries and a strategic location for safeguarding national security.Its economic development is the core and key of China’s“the Belt and Road Initiative”strategy.However,there are existing problems in Xinjiang,such as water resource shortages,agricultural inefficiency,increasing desertification,and an imbalance in regional economic development.In response to these problems,the project team innovatively proposed a strategic concept of using energy to develop modem agriculture facilities in Xinjiang to control desertification.The Xinjiang Energy-Based Desert Management Project is guided by the concept of ecological civilization,and the promotion of Xinjiang’s desert governance system and modernization of governance capacity.
