共搜索到730条信息,每页显示10条信息,共73页。用时:0小时0分0秒332毫秒
......
齿轮钢20CrMoH脱硫的热力学研究王郢1,郭佳2,杨文1,景财良2,王新华2(1.北京市北京科技大学 冶金与生态工程学院2.北京科技大学 材料科学与工程学院,北京 100083)摘 要:采用LD-LF-RH-CC的工艺路线,出钢采用Al脱氧,造高碱度低氧化性精炼渣,生产高品质汽车用齿轮钢20CrMoH.使用KTH模型和推导硫分配比公式对生产过程的硫容量和硫的分配比进行了计算,将预测与实测的硫分配比进行对比;并对整个精炼过程的脱硫效果进行了分析.关键词:齿轮钢; 脱硫; 硫容量; 硫分配比......
......
flocculation behaviour in comparison with pyrite. Key words: bacteria; sulphide mineral; Zeta-potential; adhesion; FT-IR; flocculation; flotation  ... oxidation similar to Acidithiobacillus ferrooxidans but cannot able to oxidise sulphur. Both strains of microorganisms were successfully used for bioleaching of sulphide ores and concentrates[8-9......
......
and grinding optimization of cassiterite polymetallic sulphide ore ZHOU Wentao1, HAN Yuexin1, LI Yanjun1, SUN Yongsheng1, YANG Jinlin2, MA Shaojian2 (1. College of Resources & Civil Engineering... characterization method and the concept of "step grinding" for cassiterite polymetallic sulphide ore were put forward. The results show that the main components of the cassiterite polymetallic sulfide ore......
with strain YN22, Sulfobacillus thermosulfidooxidans, shows that strain YNTC-1 has no evident influence on bioleaching rates of these two sulphide minerals. Key words: bioleaching; sulphide minerals... and economical than conventional pyrometallurgy[1-3]. Bacterial leaching of metal sulfides has developed rapidly in the last decades. Recovering metals from sulphide minerals by acidophiles has developed......
process, including hydrochloric acid leaching, iron powder replacing, sulphide precipitation and spray pyrolysis, was proposed to treat iron concentrate recovered from zinc kiln slag for comprehensive... utilization of iron concentrate recovered from zinc kiln slag can be realized. Key words: zinc hydrometallurgy; kiln slag; leaching; spray pyrolysis; sulphide precipitation Foundation item: Projects......
. Boliden Mineral AB, SE-936 81 Boliden, Sweden Received 3 August 2011; accepted 6 December 2011 Abstract: The modelling and optimization for the alkaline sulphide leaching of a complex copper concentrate.... The leaching temperature, sulphide ion concentration and solid concentration were chosen as the variables, and the response parameters were antimony and tin recovery, and the time required to achieve 90% Sb......
硫化法分离红土矿中镍铁的研究 王瑞祥1,周友元2,熊道陵1,梁勇1,李金辉1 (1.江西理工大学,材料与化学工程学院,江西,赣州,341000;2.中南大学,冶金科学与工程学院,湖南,长沙,410083) 摘要:研究了硫化沉淀分离镍与铁的分离机理及工艺影响条件.结果表明:温度,pH值,硫化剂加入方式,配离子均会对镍和铁的分离富集产生影响,其中pH值的影响最大;控制好pH值,选择好合适的温度及加入方式,镍与铁可以较好的分离. 关键词:红土矿; 硫化沉淀法; 镍铁分离; laterite; sulphide precipitation; nickel and iron separation; [全文内容正在添加中] ......