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Lead matte pyrogenic process treatment technology

A fire treatment, lead matte technology, applied in the direction of improving process efficiency, can solve the problems of high blowing temperature, inapplicability, and great influence on the life of the furnace body, and achieve the effect of complete separation and lower melting point.

Active Publication Date: 2013-09-25
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, the premise of realizing this step is to have a bottom-blown smelting furnace to make the lead matte in a molten state. Obviously, this method is not suitable for the process that takes the lead matte raw material as the recovery object
Secondly, the blowing temperature is greater than 1200°C, which has a great impact on the life of the furnace body

Method used

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  • Lead matte pyrogenic process treatment technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of lead matte pyroprocessing process of the present embodiment comprises the following main steps:

[0026] (1) Crush lead matte to 80-100 mesh, and mix evenly according to the mass ratio of lead matte: sodium carbonate: coke = 100:10:10;

[0027] (2) Add the mixed materials into the reverberatory furnace from the feeding port;

[0028] (3) Heat up to 600°C with coal block and keep it warm for 2 hours;

[0029] (4) Heat up to 1000°C and keep it warm for 1 hour;

[0030] (5) Release the slag on the melt;

[0031] (6) After the slag discharge is completed, put the molten lead-copper liquid into the lead bucket, and remove the scum above to obtain the lead-copper alloy;

[0032] (7) Combine the slag released in step (5) and the scum produced in step (6) into matte slag; according to matte slag: sodium carbonate: coke = 100:5~10:5~10, the ingredients are returned to the reverberatory furnace for remelting , the lead-copper alloy is further refined to separate lea...

Embodiment 2

[0034] A kind of lead matte pyroprocessing process of the present embodiment comprises the following main steps

[0035] (1) Crush lead matte to 80-100 mesh, and mix evenly according to the mass ratio of lead matte: sodium carbonate: coke = 100:20:20;

[0036] (2) Add the mixed materials into the reverberatory furnace from the feeding port;

[0037] (3) Heat up to 700°C with coal block and keep it warm for 2 hours;

[0038] (4) Continue heating to 1100°C and keep it warm for 2 hours;

[0039] (5) Release the slag on the melt;

[0040] (6) After the slag discharge is completed, put the molten lead-copper liquid into the lead bucket, and remove the scum above to obtain the lead-copper alloy;

[0041] (7) Combine the slag released in step (5) and the scum produced in step (6) into matte slag; according to matte slag: sodium carbonate: coke = 00:5~10:5~10, the ingredients are returned to the reverberatory furnace for remelting , the lead-copper alloy is further refined to sepa...

Embodiment 3

[0043] A kind of lead matte pyroprocessing process of the present embodiment comprises the following main steps

[0044] (1) Break the lead matte and mix evenly according to the mass ratio of lead matte: sodium carbonate: coke = 100:16:15;

[0045] (2) Add the mixed materials into the reverberatory furnace from the feeding port;

[0046] (3) Heat up to 700°C with coal block and keep it warm for 1.5 h;

[0047] (4) Continue heating to 1050°C and keep it warm for 1.5 h;

[0048] (5) Release the slag on the melt;

[0049] (6) After the slag discharge is completed, put the molten lead-copper liquid into the lead bucket, and remove the scum above to obtain the lead-copper alloy;

[0050] (7) Combine the slag released in step (5) and the scum produced in step (6) into matte slag; according to matte slag: sodium carbonate: coke = 00:5~10:5~10, the ingredients are returned to the reverberatory furnace for remelting , the lead-copper alloy is further refined to separate lead, coppe...

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Abstract

The invention relates to a lead matte pyrogenic process treatment technology, which belongs to the field of pyrometallurgy. According to the lead matte pyrogenic process treatment technology, coke is used as a reducer and sodium carbonate is used as a mixed reactant, the major elements of lead and copper in lead matte are recovered by using the principle that the carbon in the coke reacts with sulfides of lead and copper in the lead matte to produce a lead copper alloy; since sodium sulfide is produced by the reaction, the melting point of the slag is reduced, and the slag is more completely separated from the lead copper alloy; meanwhile, other impurity metals such as zinc and iron in the lead matte are also subjected to similar reaction to be reduced into the lead copper alloy, and the impurity metals entering the lead copper alloy are separated with ease subsequently and have an extremely small effect on the entire lead matte pyrogenic process treatment technology; the sulfur in the lead matte is completely converted into the sodium sulfide so as to prevent environmental pollution, realize green production and meet the environmental protection requirements.

Description

technical field [0001] The invention relates to a pyrometallurgical process in the field of metallurgy, in particular to a lead matte pyrometallurgical treatment process. Background technique [0002] Lead matte is a material with high copper content in bottom blowing furnaces, reverberatory furnaces, blast furnaces and enrichment furnaces in the lead smelting system. 2 In addition to S, it also contains more FeS and PbS. Its typical composition is Pb: 10-20%, Cu: 25-35%, Fe: 15-20%, S: 15-20%. At present, there are two processes for the recovery of lead and copper valuable metals in lead matte: wet method and fire method. The wet method of lead matte treatment is a technology that has developed rapidly in recent years. Alkali system has extremely high requirements on equipment and high production cost. Most of the existing fire processes use the blast furnace method and the reverberatory furnace method to deplete the lead matte to obtain blister copper, which is further ...

Claims

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Application Information

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IPC IPC(8): C22B5/10C22B15/00C22B13/02
CPCY02P10/20
Inventor 黄海飞谢兆凤刘万里覃小龙谭霖柴承平陈兰蒋朝金粟明辉
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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