摘要
以红土镍矿硝酸浸出液为对象,系统研究了硝酸浸出液中沉淀除铝环节,并提出一种高效沉淀除铝的新方法。详细考察了温度、p H值和时间对沉淀除铝的影响,得到最佳工艺条件为温度40℃、p H值4.0~4.2、时间30 min。和常规沉淀法对比,最佳工艺条件下得到的铝渣镍、钴夹带率均小于1%,比常规沉淀法低3%以上;得到的沉淀矿浆固液分离容易,在负压0.04 MPa时,抽滤速度为0.22 m^3/(h·m^2),是常规沉淀法的12~13倍,成功解决了湿法冶金中铝沉淀后难过滤及有价金属夹带多的难题,具有广阔的应用前景。
The removal of aluminum from nitric acid leaching liquor of laterite nickel ore was investigated. The aluminum removal process in the nitric acid leaching solution was systematically studied,and a high-efficiency precipitation method of aluminum removal was proposed The effect of temperature,p H value and time on the removal of aluminum from precipitation were examined in detail.The optimum processing conditions were temperature 40 ℃,pH 4. 0—4. 2 and time 30 min. Compared with the conventional precipitation method,the entrainment rate of nickel and cobalt are both less than1% in aluminum slag obtained under the optimum process conditions,which is 3% lower than the conventional precipitation method. The obtained precipitate slurry is easy to be separated by solid and liquid,and when the negative pressure is-0. 04 MPa,the suction filtration rate is 0. 22 m^3/（ h·m^2）,which is 12 to 13 times that of the conventional precipitation method. This high-efficiency precipitation method solves the difficult problem of difficult filtration and entrapment of valuable metals after precipitation of aluminum in hydrometallurgy,and has broad application prospects.
作者
杨玮娇
马保中
杨卜
蒋兴明
王华
YANG Weijiao;MA Baozhong;YANG Bo;JIANG Xingming(Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology,Kunming 650093,China;Beijing General Research Institute of Mining and Metallurgy Technology Group,Beijing 100160,China;School of Metallurgical and Ecological Engineering,University of Science and Technology,Beijing 100083,China)
出处
《有色金属工程》
CAS
CSCD
北大核心
2018年第4期57-61,共5页
Nonferrous Metals Engineering
基金
国家自然科学基金资助项目(51304023)
关键词
硝酸浸出液
高效沉淀
除铝
nitric acid leach liquor
high-efficiency precipitation
aluminum removal
