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A treatment process for copper smelting dust

A treatment process, copper smelting technology, applied in the field of copper smelting fume treatment process, can solve problems such as difficult treatment, lower conversion rate, deterioration of furnace condition, etc., achieve the effect of solving open circuit problem and improving capacity

Active Publication Date: 2018-03-23
YANGGU XIANGGUANG COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the characteristics of such materials as complex components, difficult to handle, and polluting the environment, there is no mature and reliable technology in the world that can comprehensively recycle the above materials together.
At present, the method of copper smelting dust blending and returning to smelting has the following problems: the actual processing capacity of copper concentrate is reduced, the rate of copper smelting dust increases, and the furnace condition deteriorates; at the same time, harmful impurity elements circulate and accumulate in the system in a closed circuit, Increase the impurity content in the flue gas, which not only shortens the service life of the acid catalyst and reduces the conversion rate, but also reduces the quality of sulfuric acid and anode copper products

Method used

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  • A treatment process for copper smelting dust
  • A treatment process for copper smelting dust
  • A treatment process for copper smelting dust

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] See Table 1-1 for the composition of copper smelting dust, which contains high arsenic and low copper; see Table 1-2 for the composition of waste acid.

[0080] Table 1-1 Composition of copper smelting dust

[0081] Element

[0082] Table 1-2 Composition of waste acid

[0083] As

[0084] 1. Pickling

[0085] Prepare the waste acid into an acid solution with an acid mass concentration of 12.5%, and prepare the solution according to the solid-to-liquid ratio of smoke and acid solution at a ratio of 1:4, add it to the reaction kettle, heat it to 80°C, and react for 3.5 hours. After 3.5 hours, it will be solid-liquid Separation and leaching results are shown in Table 1-3.

[0086] Table 1-3 Leaching results

[0087] project

[0088] The composition of acid leaching slag is shown in Table 1-4.

[0089] Table 1-4 Composition of acid leaching slag

[0090] As

[0091] Lead and bismuth are further recovered from the acid leaching sl...

Embodiment 2

[0121] The composition of copper smelting dust is shown in Table 2-1, and the dust contains high arsenic and low copper; the composition of waste acid is shown in Table 2-2.

[0122] Table 2-1 Composition of copper smelting dust

[0123] Element

[0124] Table 2-2 Composition of waste acid

[0125] As

[0126] 1. Pickling

[0127] Prepare the waste acid so that the acid concentration is 165g / l, make liquid according to the solid-to-liquid ratio of dust and acid liquid mass 1:6, add it to the reaction kettle, heat to 70°C, react for 5 hours, and separate the solid and liquid after 5 hours, see the leaching results Table 2-3.

[0128] Table 2-3 Leaching results

[0129]

[0130]

[0131] The components of the acid leaching slag are shown in Table 2-4.

[0132] Table 2-4 Composition of acid leaching slag

[0133] As

[0134] Lead and bismuth are further recovered from the acid leaching slag.

[0135] 2. Metal replacement sinking copper

...

Embodiment 3

[0162] The composition of copper smelting dust is shown in Table 3-1, the dust contains high arsenic and low copper; the composition of waste acid is shown in Table 3-2.

[0163] Table 3-1 Composition of copper smelting dust

[0164] Element

[0165] Table 3-2 Composition of waste acid

[0166] As

[0167] 1. Pickling

[0168] Prepare the waste acid into an acid solution with an acid mass concentration of 130g / l, and prepare the solution according to the solid-to-liquid ratio of smoke dust and acid solution at a ratio of 1:4.5, add it to the reaction kettle, heat to 80°C, and react for 3.5 hours. After 3.5 hours, it will solidify Liquid separation, leaching results are shown in Table 3-3.

[0169] Table 3-3 Leaching results

[0170]

[0171] The components of the acid leaching slag are shown in Table 3-4.

[0172] Table 3-4 Composition of acid leaching slag

[0173] As

[0174] Lead and bismuth are further recovered from the acid leaching ...

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Abstract

The invention discloses a treatment process for copper smelting smoke dust. The treatment process comprises the following steps that 1, after the copper smelting smoke dust is subjected to acid leaching, acid leaching liquor and acid leaching residues are obtained; 2, after the acid leaching liquor obtained in the step 1 is subjected to copper depositing through metal replacement, filter liquor with copper being deposited is obtained; 3, after the filter liquor with the copper being deposited in the step 2 neutralizes and oxidizes with alkali, ferric arsenate and filter liquor with arsenic being deposited are obtained; 4, after the filter liquor with arsenic being deposited in the step 3 is subjected to the secondary copper depositing through metal replacement, filter liquor being subjected to the secondary copper depositing and copper residues are obtained; and 5, after the filter liquor being subjected to the secondary copper depositing in the step 4 is subjected to zinc depositing through vulcanization, filter liquor with zinc being deposited and zinc residues are obtained. According to the treatment process for the copper smelting smoke dust provided by the invention, particularly, a treatment process for high-arsenic low-copper smoke dust, the harmless treatment of arsenic in the high-arsenic low-copper smoke dust is achieved; meanwhile, valuable metal copper, zinc, lead, bismuth and the like in the high-arsenic low-copper smoke dust are recovered comprehensively, and gradient recycle and comprehensive utilization of the impurities of the smoke dust are achieved.

Description

technical field [0001] The invention belongs to the technical field of copper smelting, and in particular relates to a treatment process for copper smelting smoke. Background technique [0002] Copper smelting technology refers to the process of obtaining refined copper from copper ore through various process steps. The copper smelting industry is a basic industry in the national economy, especially in my country, which is in the stage of industrialization, and the demand for copper maintains a high-speed growth. The status of the smelting industry in the national economy has been continuously improved. At present, the copper smelting industry has entered a new round of industrial upgrading period, and the copper smelting industry is becoming increasingly collectivized, specialized, large-scale and internationalized. The development of copper smelting technology has gone through a long process, but so far copper smelting is still dominated by pyrometallurgy, and its output a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B15/00C22B19/30C22B30/04
CPCC22B7/007C22B7/02C22B15/0067C22B15/0091C22B19/30C22B30/04Y02P10/20
Inventor 周松林谢祥添葛哲令王永明
Owner YANGGU XIANGGUANG COPPER
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