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氰化尾渣高效脱氰富集硫铁技术研究
Alternative TitleThe research on the efficient destruction of cyanide and recovery of pyrite from the residue of cyanide
孙淑慧
Subtype硕士
Thesis Advisor叶树峰
2013-05-01
Degree Grantor中国科学院研究生院
Place of Conferral北京
Degree Discipline材料工程
Keyword氰化尾渣   硫铁矿   浮选   gs-01   破氰   分散
Abstract由于氰化尾渣中往往含有较高的硫铁矿,可以用于生产硫酸,但只有当硫铁矿中硫品位>47%时,制酸产生的硫酸烧渣才能作为铁精矿直接利用,否则会带来二次污染,同时低品位硫铁矿制酸余热不能充分利用。因此为了充分利用氰化尾渣,需要将氰化尾渣中硫铁矿进行富集。本论文从氰化物抑制硫铁矿的可浮性以及氰化尾渣粒度细,脉石矿物与硫铁矿不能充分分散两方面考察了氰化尾渣中硫铁矿难选的原因,在此基础上制备出一种新型的药剂GS-01,具有破除氰化物、分散矿浆的作用,可以在不加酸调整矿浆pH为酸性条件下,获得合格的硫精矿。 具体结论如下: (1)药剂GS-01主要由两组分组成,组分A为聚合磷酸盐类物质,B为含有金属离子的复合无机盐。制备条件为A:B=4:3,溶液pH=10,反应温度为80℃,反应时间为1h。 (2)在矿浆浓度为30%、pH值为6.8、GS-01用量为3000g/t、异戊钠黄药用量为300g/t、2#油用量为80g/t的条件下,采用一粗二精二扫的闭路流程,得到硫品位为48.36%,回收率为93.77%的硫精矿。 (3)GS-01具有一定的氧化性,可以将溶液中游离的CN-和简单氰化物氧化。同时通过红外测试发现,GS-01可以与硫铁矿表面的铁氰络合物反应,生成沉淀,剥落下来,暴露出新鲜的硫铁矿表面,从而活化硫铁矿。 (4)GS-01含有长链阴离子,具有分散作用。GS-01主要对硫铁矿起作用,并且作用效果与药剂用量有关。当药剂用量低时,药剂通过物理吸附形式吸附在矿物表面,使矿物表面电位变正,矿物之间的静电斥力降低,细粒硫铁矿团聚现象增多,药剂起絮凝作用;药剂用量高时,药剂与矿物表面发生化学吸附,使黄铁矿表面电位变的更负,矿物之间静电斥力增大,药剂主要起分散作用。
Other AbstractThe pyrite in cyanide residues can be used to produce sulfuric acid. But only when the concentration of the pyrite is more than 47%, can the pyrite cinder be utilized as iron concentrate, otherwise the environment can be polluted and the waste heat can’t be fully reused. So to fully utilize the valuable component in cyanide tailings, the pyrite has to be enriched. However, it’s difficult to recycle pyrite, due to the remained cyanide and the micrograined gangue. Based on our knowledge about the reason for the difficulties to recycle pyrite from the residue of cyanide, in the search of a new recipe agent for flotation, we mainly target to raise or enforce its role in destructing cyanide and dispersing gangue. Based a series of comprehensive test, a new recipe agent named GS-01 was synthesized to enrich pyrite from the cyanide residues. The new recipe agent has the advantage to destructing cyanide and dispersing gangue in a mild pH condition, thus to help us get the acceptable pyrite from cyanide residues. (1) GS-01 is mainly composed of two component A and B. A is polymerization phosphate, and B is inorganic compound. GS-01 is synthesized put A and B in reaction under a condition of pH value of 10 and temperature of 80 oC for 1 hour. (2) With the help of GS-01, we can get a sulfur concentrate with 48.36% S grade and 93.77% S recovery using a flotation process consisting of a one-step rougher flotation, a two-step cleaner flotation and a two-step scavenger flotation, where the density of the pulp is 30% and pH of the pulp is 7, the addition of GS-01 is 3000g/t, the addition of xanthate is 300g/t and the addition of 2# oil is 80g/t. (3) GS-01 can destroy the cyanide of pulp by oxidating the simple cyanide. Besides, with the help of infrared spectrum test, we find that GS-01 can form complexion formation with ferrocyanide. Ferrocyanide is easy to be removed from the surface of pyrite, thus to expose the fresh pyrite surface. (4) The recipe can disperse the pulp to activate the pyrite. The research indicates that the recipe mainly works on pyrite. When the addition of the recipe is low, the fine mineral particles are coagulated. On the contrary, when the addition of the recipe is high, the fine mineral particles are well dispersed. Through the zeta potential test, we can get that the absolute value of zeta potential of pyrite is reduced when the addition of the recipe is low. And the absolute value of zeta potential of pyrite is increased when the addition of the recipe is high. So when the absolute value of pyrite’s zeta potential is reduced, the electrostatic repulsion between the particles is reduced and the fine mineral particles are coagulated. When the absolute value of pyrite’s zeta potential is increased, the electrostatic repulsion between the particles is increased and the fine mineral particles are electrostatic 
Pages91
Language中文
Document Type学位论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/8344
Collection研究所(批量导入)
Recommended Citation
GB/T 7714
孙淑慧. 氰化尾渣高效脱氰富集硫铁技术研究[D]. 北京. 中国科学院研究生院,2013.
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