期刊文献+
共找到8篇文章
< 1 >
每页显示 20 50 100
Preparation of Potassium Sulphate from Microcline Powder
1
作者 su shuangqing MA Hongwen +2 位作者 YANG Jing CAI Biya ZHANG Pan 《矿物学报》 CAS CSCD 北大核心 2013年第S1期83-83,共1页
Agricultural potassium sulphate is one of the most important non-chloride potash, which is the main fertilizer of avoid chlorine crop. Soluble potassium resource is bare in China, while insoluble potassium resource wi... Agricultural potassium sulphate is one of the most important non-chloride potash, which is the main fertilizer of avoid chlorine crop. Soluble potassium resource is bare in China, while insoluble potassium resource with the main mineral of microcline is extremely abundant. The microcline powder used is collected from Mountain Changling, Luonan county of Shaanxi Province. The chemical analysis results showed that the main chemical components of the powder are SiO2, Al2O3 and K2O, the K2O content is up to 13.56% (shown in table 1). 展开更多
关键词 POTASSIUM FELDSPAR kalsilite POTASSIUM sulphate HYDROTHERMAL process
原文传递
中国富钾正长岩资源与水热碱法制取钾盐反应原理 被引量:2
2
作者 马鸿文 杨静 +10 位作者 张盼 刘昶江 苏双青 姚文贵 罗征 刘梅堂 殷丛丛 陈建 原江燕 常倩倩 郭若禹 《地学前缘》 EI CAS CSCD 北大核心 2018年第5期277-285,共9页
中国的盐湖钾盐资源短缺,导致钾盐消费的对外依存度达50%以上,严重制约农业发展,威胁粮食生产安全。而正长岩型钾资源丰富,K_2O品位达8.5%~15.4%,预测资源潜力(K_2O)达盐湖钾盐储量的20倍以上。此类矿石钾资源的主要富钾矿物为微斜长石... 中国的盐湖钾盐资源短缺,导致钾盐消费的对外依存度达50%以上,严重制约农业发展,威胁粮食生产安全。而正长岩型钾资源丰富,K_2O品位达8.5%~15.4%,预测资源潜力(K_2O)达盐湖钾盐储量的20倍以上。此类矿石钾资源的主要富钾矿物为微斜长石、霞石和白云母,地理上主要分布于中国东部的"秦岭大别正长岩带"和"燕辽阴山正长岩带"。采用电解质溶液热力学软件OLI Analyzer 9.2,对KAlSi_3O_8-NaOH/KOH/Ca(OH)_2-H_2O体系相平衡进行模拟,继而对代表性富钾正长岩进行水热碱法分解反应实验,证实K_2O溶出率高达85.6%以上。所得硅酸钠钾碱液适于加工多种钾盐或生态型钾肥产品,硅铝组分同时转化为沉淀硅酸钙、钠型/钾型沸石、硅灰石、高岭土等多种工业产品。水热碱法技术的加工过程清洁高效,资源利用率高,环境相容性良好,可为发展绿色可持续的中国钾盐工业新体系提供良好的技术基础。 展开更多
关键词 正长岩 钾长石 钾矿资源 水热分解 钾盐化工 绿色发展
下载PDF
我国煤矿矿井水氟污染现状及除氟技术研究 被引量:27
3
作者 苏双青 赵焰 +6 位作者 徐志清 李井峰 李庭 陆梦楠 杨燕 孙斌 陈雪 《能源与环保》 2020年第11期5-10,共6页
氟污染成为制约矿井水资源化利用的重要因素,分析了我国煤矿矿井水氟污染现状及含氟矿井水的水质特征。化学沉淀法、混凝沉淀法、离子交换—吸附法、电化学法和膜法是目前常用的除氟方法,通过对各种除氟方法的原理、处理效果和优缺点等... 氟污染成为制约矿井水资源化利用的重要因素,分析了我国煤矿矿井水氟污染现状及含氟矿井水的水质特征。化学沉淀法、混凝沉淀法、离子交换—吸附法、电化学法和膜法是目前常用的除氟方法,通过对各种除氟方法的原理、处理效果和优缺点等进行对比发现,离子交换—吸附法较为成熟,在矿井水除氟工程中应用最为广泛。研究表明,开发高效、经济、安全、稳定的除氟材料与成套装备,是含氟矿井水资源化利用的重要途径。 展开更多
关键词 矿井水 氟污染 除氟 混凝沉淀 吸附
下载PDF
钨酸钠与天然土状石墨在高温氩气氛围中的转化过程 被引量:1
4
作者 魏霖荫 传秀云 +2 位作者 黄杜斌 苏双青 金时运 《北京大学学报(自然科学版)》 EI CAS CSCD 北大核心 2017年第1期50-56,共7页
以Na_2WO_4为钨源,天然土状石墨为碳源,研究二者在高温氩气气氛下的转化过程及规律,利用X射线衍射(XRD)、扫描电子显微镜(SEM)及电子能谱(EDS)对产物进行分析。结果表明,Na_2WO_4与石墨的混合样品在氩气气氛下经高温处理,可以生成不同... 以Na_2WO_4为钨源,天然土状石墨为碳源,研究二者在高温氩气气氛下的转化过程及规律,利用X射线衍射(XRD)、扫描电子显微镜(SEM)及电子能谱(EDS)对产物进行分析。结果表明,Na_2WO_4与石墨的混合样品在氩气气氛下经高温处理,可以生成不同的碳钨化合物。首先,石墨与Na_2WO_4在接触界面发生还原反应,将Na_2WO_4还原为α-W2C和β-W2C;然后,随着石墨增多,当Na_2WO_4与石墨的质量比小于1:1时,石墨开始将α-W2C还原为α-WC,直至Na_2WO_4与石墨的质量比为1:5时,石墨可以将α-W2C完全转化为α-WC。 展开更多
关键词 石墨 Na2WO4 WC 高温处理 X射线衍射(XRD) 扫描电子显微镜(SEM) 电子能谱(EDS)
下载PDF
20 Years Advances in Preparation of Potassium Salts from Potassic Rocks:A Review 被引量:6
5
作者 MA Hongwen YANG Jing +6 位作者 su shuangqing LIU Meitang ZHENG Hong WANG Yingbin QI Hongbin ZHANG Pan YAO Wengui 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2015年第6期2058-2071,共14页
Long-term research on key techniques of clean utilization of potassic rocks from over twenty localities has been performed to settle the shortage of soluble potassium resources in China. The results show that K-feldsp... Long-term research on key techniques of clean utilization of potassic rocks from over twenty localities has been performed to settle the shortage of soluble potassium resources in China. The results show that K-feldspar as the principal mineral enriched in potassium could be decomposed in the media of Ca(OH)_2, NaOH, KOH-H_2O solution via hydrothermal treatment, into tobermorite, hydroxylcancrinite, and kalsilite respectively. By further processing, these compounds are feasible for being as slow-release carrier of potassium nitrate, extracting alumina, and preparing farm-oriented fertilizers of potassium sulphate and nitrate. Correspondingly, the filtrate is KOH,(Na, K)_2SiO_3, and K_2SiO_3 solution, from which potassium carbonate, sulphate, nitrate, and phosphate could be easily fabricated. As NaO H and KOH are recycled in the processing chains by causticizing sodium and/or potassium metasilicate solutions, the hydrothermal alkaline techniques as developed in this research have several advantages as lower consumption of disposable mineral resources and energy, maximized utilization of potassic mineral resources, as well as clean productions etc. Based on the approaches presented in this paper, the technical system of efficiently utilizing insoluble potassium resources has been established. The hydrothermal alkaline methods are feasible to be industrialized on a large scale, thus resulting in decreasing imports of potash fertilizers, improving the pattern of potassium fertilizer consumption, and enhancing the supplying guarantee of potassium resource in China. 展开更多
关键词 K-FELDSPAR potassium salt alkaline digestion green processing sustainable development
下载PDF
环境矿物材料对矿井水中氟化物的吸附性能研究 被引量:3
6
作者 何瑞敏 苏双青 +2 位作者 赵焰 李井峰 包一翔 《煤炭技术》 CAS 北大核心 2022年第8期111-114,共4页
以斜发沸石、火山石、蛇纹石、膨润土、凹凸棒土5种环境矿物材料作为吸附剂,探究其对低浓度氟离子的吸附效果,筛选适宜大规模含氟矿井水除氟的矿物材料。结果表明,膨润土对氟离子去除率最高,初始氟离子浓度为5 mg/L时去除率达到54.08%,... 以斜发沸石、火山石、蛇纹石、膨润土、凹凸棒土5种环境矿物材料作为吸附剂,探究其对低浓度氟离子的吸附效果,筛选适宜大规模含氟矿井水除氟的矿物材料。结果表明,膨润土对氟离子去除率最高,初始氟离子浓度为5 mg/L时去除率达到54.08%,对氟离子的吸附符合准二级动力学模型,吸附过程发生了化学反应,氟离子与膨润土中的羟基发生离子交换。膨润土改性后用于含氟矿井水处理,氟离子去除率达到87.8%,出水的氟离子浓度为0.63 mg/L,达到饮用水标准。 展开更多
关键词 环境矿物材料 矿井水 膨润土 氟离子 吸附
原文传递
Compositions,Proportions,and Equilibrium Temperature of Coexisting Two-feldspar in Crystalline Rocks 被引量:1
7
作者 MA Hongwen YANG Jing +1 位作者 su shuangqing YAO Wengui 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2017年第3期875-881,共7页
Compositions, proportions, and equilibrium temperature of coexisting two-feldspar in crystalline rocks are of great importance to classification in petrography and interpretation of petrogenesis. Crystalline rocks are... Compositions, proportions, and equilibrium temperature of coexisting two-feldspar in crystalline rocks are of great importance to classification in petrography and interpretation of petrogenesis. Crystalline rocks are usually composed of 4-6 minerals (phases), depending on their independent chemical components and the equilibrium temperature of crystallizations. In general, number of mineral phases can be determined by the "Phase Rule". According to the mass balance principle, bulk composition of coexisting two-feldspar could be evaluated from the bulk chemistry of a rock, provided that the compositions of the coexisting mafic mineral phases containing calcium, sodium, and potassium oxides are determined, e.g., by microprobe analysis. The compositions, proportions, and temperature of two-feldspar in equilibrium can thus be simultaneously resolved numerically from bulk composition of the rock, by incorporating the activity/composition relations of the ternary feldspars with the mass balance constraints. Upon the numerical approximation method presented in this paper, better-quality, internally consistent data on feldspar group could usually be obtained, which would be expected more realistic and accurate in consideration of thermodynamic equilibria in the system of crystalline rocks, as well as bulk chemistry of a rock and the composing minerals. 展开更多
关键词 crystalline rocks mass balance principle feldspar proportion activity equation equilibrium temperature
下载PDF
Nepheline Syenite Decomposition Using NaOH by Hydrothermal Reaction
8
作者 ZHANG Pan MA Hongwen +2 位作者 YANG Jing MA Xi su shuangqing 《矿物学报》 CAS CSCD 北大核心 2013年第S1期137-137,共1页
Nepheline syenite is an important potassium-rich rock resource. Nepheline syenite powder was decomposed successfully by hydrothermal reaction using NaOH additive. Hydroxycancrinite (Na8(Al6Si6O24)(OH)2·2H2O ) sol... Nepheline syenite is an important potassium-rich rock resource. Nepheline syenite powder was decomposed successfully by hydrothermal reaction using NaOH additive. Hydroxycancrinite (Na8(Al6Si6O24)(OH)2·2H2O ) solid and (K,Na)2SiO3 solution was obtained as a result of the hydrothermal reaction. 展开更多
关键词 NEPHELINE SYENITE NAOH HYDROTHERMAL REACTION hydroxycancrinite
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部