从鼓风炉冶炼粗铅副产物铅冰铜中提铜的工艺研究
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摘要
基于鼓风炉冶炼副产品铅冰铜,提出了加硫酸亚铁氧化焙烧—硫酸浸出提铜工艺。分析了焙烧过程中的物相变化,重点研究了浸出过程中初始硫酸浓度、浸出温度、浸出时间、液固比等对铜浸出率的影响。试验表明,铅冰铜中的硫化物经焙烧后转化为硫酸盐;焙烧产物在初始硫酸浓度1.5 mol/L、温度95°、时间2.0 h、液固比4:1的条件下浸出,铜浸出率达到98.22%,浸出渣主要物相为PbSO_4、Fe_2O_3。该工艺具有流程短、操作简单、铜浸出率高等优点。
With lead matte as the by-product in blast furnace smelting, the process of oxidizing roasting by ferrous sulfate addition-sulfuric acid leaching for copper extraction is proposed. This paper analyzes the phase change in roasting process and mainly studies the impact of initial sulfuric acid concentration, leaching temperature, leaching time and liquid-solid ratio on copper leaching rate during the leaching process. The test results show that after the roasting, the sulfide in lead matte is converted sulfate; the roasting product leaching conditions include initial sulfuric acid concentration of 1.5 mol/L, leaching temperature of 95℃, leaching time of 2.O h and liquid-solid ratio of4: 1; in this way, copper leaching rate reaches 98. 22%. The main phases in leaching residue include PbS0_4 and Fe_2O_3. This process has the advantages of short process flow, easy operation and high copper leaching rate.
With lead matte as the by-product in blast furnace smelting, the process of oxidizing roasting by ferrous sulfate addition-sulfuric acid leaching for copper extraction is proposed. This paper analyzes the phase change in roasting process and mainly studies the impact of initial sulfuric acid concentration, leaching temperature, leaching time and liquid-solid ratio on copper leaching rate during the leaching process. The test results show that after the roasting, the sulfide in lead matte is converted sulfate; the roasting product leaching conditions include initial sulfuric acid concentration of 1.5 mol/L, leaching temperature of 95℃, leaching time of 2.O h and liquid-solid ratio of4: 1; in this way, copper leaching rate reaches 98. 22%. The main phases in leaching residue include PbS0_4 and Fe_2O_3. This process has the advantages of short process flow, easy operation and high copper leaching rate.
引文
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[13]刘卫平.苏打-铁屑法处理基夫赛特炉铅冰铜试验研究[J].湖南有色金属,2015,31(3):30-33.
[14]黄超,沈强华,张弦,等.窑渣-还原熔炼铅冰铜新工艺研究[J]矿冶,2016,25(3):58-60.
[2]范兴祥·一种环境友好的黄铜矿浸出新工艺及理论研究[D].昆明:昆明理工大学,2006.
[3]蒋朝金,黄海飞,杨跃新.铅冰铜盐酸浸出试验研究[J].湖南有色金属,2015,31(4):36-38.
[4]周崇松,胡婕,李溪,等.从铅冰铜渣中绿色浸铜工艺研究[J].山东化工,2016,45(11):6-8.
[5]文剑锋,杨天足,王安,等.铅冰铜控制电位选择性氯化浸出[J].湖南有色金属,2011,27(1):24-29.
[6]Kyung-Ho Park,Debasish Mohapatra,B.Ramachandra Reddy,Chul-woo Nam.A study on the oxidative ammonia/ammoniumsulphate leaching of a complex(Cu-Ni-Co-Fe)matte[J].Hydrometallurgy,2007,86(3-4):164-171.
[7]Raghavan R,Mohanan P K,2000.Hydrometallurgical treatment of copper matte generated at a lead smelter for simultaneous recovery of copper,lead and silver[J].Bull.Electrochem,2000,16(1),44-48.
[8]Fei Yin,Peng Xing,Qiang Li,et al.Magnetic separation-sulphuric acid leaching of Cu-Co-Fe matte obtained from copper converter slag for recovering Cu and Co[J].Hydrometallurgy,2014,149:189-194.
[9]Provis J L,Van Deventer J S J,Rademan J A M,et al.A kinetic model for the acid-oxygen pressure leaching of Ni-Cu matte[J].Hydrometallurgy,2003,70(1-3):83-99.
[10]Bingjie Jin,Xianwan Yang,Qingfeng Shen.Kinetics of copper dissolution during pressure oxidative leaching of lead-containing copper matte[J].Hydrometallurgy,2009,99(I-2):119-123.
[11]Bingjie Jin,Xianwan Yang,Qingfeng Shen.Pressure oxidative leaching of lead-containing copper matte[J].Hydrometallurgy,2009,96(1-2):57-61.
[12]倪源,俞小花,华宏全,等.铅冰铜加压浸出试验研究[J].矿产保护与利用,2014 34(6):33-37.
[13]刘卫平.苏打-铁屑法处理基夫赛特炉铅冰铜试验研究[J].湖南有色金属,2015,31(3):30-33.
[14]黄超,沈强华,张弦,等.窑渣-还原熔炼铅冰铜新工艺研究[J]矿冶,2016,25(3):58-60.