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Lead removing composite agent for waste red copper and preparation method thereof

A composite agent and red copper technology, applied in the field of copper alloy lead removal agent, can solve the problems of air lead pollution, long time consumption, waste of electric energy, etc., and achieve the effects of reducing lead emissions, light and fluffy slag, and less usage.

Active Publication Date: 2011-11-23
JINTIAN COPPER GROUP CORP NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the presence of lead in the existing waste miscellaneous copper alloy will cause anode passivation in the process of electrolytic refining copper, and rice-like bubbles will be generated at the anode, which not only affects the quality of electrolytic copper but also wastes electric energy, which must be removed during the refining waste miscellaneous copper process. Lead, the traditional method of removing lead uses silicate flux. During fire refining in the reverberatory furnace, lead is oxidized to lead oxide and silicate to react to form lead silicate with low density, which floats to the surface of copper melt and is removed. This method consumes For a long time, the copper content in the waste residue accounts for about 20%, which is not conducive to improving the recovery rate
Moreover, lead is enriched in the converter dust during secondary black copper smelting, which is easy to cause air lead pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: lead removal composite agent of waste red copper, its batching weight percentage is composed of:

[0017] 25% quartz sand, 35% sodium borate, 20% calcium carbonate, 5% sodium chloride, 15% fly ash.

[0018] Put the ingredients and raw materials used into the stainless steel tank in the oven, dry at 270°C, keep warm for 4 hours, take them out and sieve them with 20-30 mesh ball mills, weigh various raw materials according to the composition of the ingredients, put them into the mixer, and put them in the mixer Stir well, take out and air-cool before packaging.

[0019] When in use, the waste red copper is melted in the smelting furnace and kept warm for 1 to 2 hours, and the lead removal compound is sprayed into the copper melt with the gas by a powder sprayer, and 0.3% of the mass of the copper melt is added. After blowing oxygen for 0.5 hours, remove slag.

[0020] Used for scrap copper with a lead content of 0.62%, its lead content is reduced from 0.62...

Embodiment 2

[0021] Embodiment 2: lead removal composite agent of waste red copper, its batching weight percent is composed of:

[0022] 30% quartz sand, 30% sodium borate, 15% calcium carbonate, 5% calcium fluoride, 10% sodium chloride, 10% fly ash.

[0023] Put the ingredients and raw materials used into stainless steel tanks in the oven respectively, dry them at 250°C, keep them warm for 5 hours, take them out, and carry out ball milling and sieving with 20-30 meshes. Weigh various raw materials according to the composition of the ingredients and put them into the blender, stir them fully in the blender, take them out and air-cool them for packaging.

[0024] When in use, the waste red copper is melted in the smelting furnace and kept warm for 1 to 2 hours, and the lead removal compound is sprayed into the copper melt with the gas by a powder sprayer, and 0.3% of the mass of the copper melt is added. After blowing oxygen for 0.5 hours, remove slag.

[0025] Used for scrap copper with ...

Embodiment 3

[0026] Embodiment 3: lead removal composite agent of waste red copper, its batching weight percent is composed of:

[0027] 30% quartz sand, 25% sodium borate, 10% calcium carbonate, 10% calcium fluoride, 10% sodium chloride, 15% fly ash.

[0028] Put the ingredients and raw materials used into stainless steel tanks in the oven respectively, dry at 240°C, keep warm for 6 hours, take them out, and carry out ball milling and sieving with 20-30 meshes. Weigh various raw materials according to the composition of the ingredients and put them into the blender, stir them fully in the blender, take them out and air-cool them for packaging.

[0029] When in use, after the waste red copper is melted in the smelting furnace and kept warm for 1-2 hours, the lead-removing compound agent is sprayed into the copper melt along with the gas by a powder sprayer, and 0.4% lead-removing compound agent of the mass of the copper melt is added. After blowing oxygen for 0.5 hours, remove slag.

[0...

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PUM

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Abstract

The invention discloses a lead removing composite agent for waste red copper, comprising the components of: 20-40 wt% of quartz sand, 20-40 wt% of sodium borate, 10-30 wt% of calcium salt, 5-10 wt% of sodium chloride and 5-20 wt% of coal ash. The calcium salt can be one or two of calcium carbonate and calcium fluoride. Compounds of the lead removing composite agent are mutually supported and complemented so that the lead removing effect is stable. The slag generated by the lead removing composite agent provided by the invention is light and fluffy, and the operation is simple. The copper content of the slag is below 10 %. The exhaust of lead in smoke is reduced so as not to form lead pollution to the air. Furthermore, both manufacture and application of the composite agent accord with environment-friendly requirements, the application amount is less, and the composite agent is safe and reliable.

Description

[0001] technical field [0002] The invention relates to a copper alloy lead removing agent, in particular to a lead removing compound agent for waste red copper and a manufacturing method thereof. Background technique [0003] At present, my country is one of the largest copper consuming countries in the world, but my country's copper ore resources are relatively scarce. With the continuous growth of the national economy and the improvement of living standards, the shortage of copper ore resources and the contradiction between supply and demand of copper demand continue to expand Therefore, how to use renewable resources and actively carry out the recycling of scrap copper has become one of the methods to solve the source of copper, and the recycling of scrap copper has many advantages such as low energy consumption, cost saving, and less impact on the environment , but in the recycled scrap copper parts, the copper alloy contains lead or nickel exceeding the limit of domesti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C9/00
Inventor 张煜姜晶晶洪燮平张学士贺挺
Owner JINTIAN COPPER GROUP CORP NINGBO
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