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Method for reducing impurity element manganese in waste yellow brass

A technology of impurity elements and yellow miscellaneous copper, which is applied in the field of reducing the impurity element manganese in waste yellow miscellaneous copper, and can solve the problem of high manganese content

Active Publication Date: 2020-12-18
NINGBO CHANGZHEN COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to overcome the problem of high manganese content in the brass regeneration raw materials in the prior art, and provides a method for reducing the impurity element manganese in waste brass miscellaneous copper. The brass raw materials are sorted and pretreated to obtain brass alloys, and put into Melting in the smelting furnace, after the raw materials are completely melted, add additives and slag accumulators, after heat preservation, refining, out of the furnace and casting ingots, and finally reduce the manganese content in brass by as much as 90%.

Method used

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  • Method for reducing impurity element manganese in waste yellow brass
  • Method for reducing impurity element manganese in waste yellow brass
  • Method for reducing impurity element manganese in waste yellow brass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]

[0043] After the pretreatment of waste and old miscellaneous copper raw materials, they were put into the melting furnace for melting and sampling, and the Mn content was measured by direct reading spectrum as 0.518%; the melt temperature was adjusted to 994°C, and additives were added. After the additives were melted, they were kept for 12 minutes; the melt temperature was adjusted to 1026°C, Add the slagging agent, after the slagging agent melts, keep it warm for 15 minutes; adjust the melt temperature to 1012°C, refine, take out the furnace and cast ingots. The Mn content of the ingot was measured by direct reading spectroscopy to be 0.0596%, and the calculation of the comparison results showed that the manganese content decreased by 88.5%.

Embodiment 2

[0045]

[0046] After the pretreatment of waste and old miscellaneous copper raw materials, they were put into the melting furnace for melting and sampling. The Mn content was measured by direct reading spectroscopy as 1.417%. The melt temperature was adjusted to 983°C, and additives were added. After the additives melted, they were kept for 15 minutes; the melt temperature was adjusted to 1015°C, Add the slagging agent, after the slagging agent is melted, keep it warm for 22 minutes; adjust the melt temperature to 1007°C, refine, take out the furnace and cast ingots. The Mn content of the ingot was measured by direct reading spectroscopy to be 0.172%, and the calculation of the comparison results showed that the manganese content decreased by 87.84%.

Embodiment 3

[0048]

[0049] After the pretreatment of waste and old miscellaneous copper raw materials, they were put into the melting furnace for melting and sampling. The Mn content was measured by direct reading spectrum to be 2.31%. The melt temperature was adjusted to 1012°C, and additives were added. After the additives were melted, they were kept for 10 minutes; the melt temperature was adjusted to 1037°C. Add the slagging agent, after the slagging agent is melted, keep it warm for 26 minutes; adjust the melt temperature to 997°C, refine, take out the furnace and cast ingots. The Mn content of the ingot was measured by direct reading spectroscopy to be 0.247%, and the calculation of the comparison results showed that the manganese content decreased by 89.31%.

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Abstract

The invention relates to the technical field of melt purification in the copper smelting process, and discloses a method for reducing impurity element manganese in waste yellow brass in order to solvethe problem that the content of manganese in brass regeneration raw materials is high in the prior art. The method includes the processing flow of sorting and pretreatment, charging and melting, smelting, refining, discharging and ingot casting. A brass alloy is obtained after sorting and pretreatment of brass raw materials, the brass alloy is put into a smelting furnace to be molten, after the raw materials are completely molten, an additive and a slag conglomeration agent are added, refining, discharging and ingot casting are performed after heat preservation, and finally, the reduction degree of the manganese content in the brass is up to 90%. The additive is added to the brass melt, and the additive reacts with the manganese element to generate an alloy compound of which the density is lower than that of the brass melt; the added slag conglomeration agent can be dispersed to the periphery of the compound, slag coagulation and slag conglomeration can be performed on the compound, meanwhile, due to introduction of the fluorine element, the viscosity of the slag can be reduced, floating of the compound slag can be facilitated, sufficient aggregation and removal of the compound slag can be guaranteed, and the brass alloy having the relatively high purity can be obtained finally.

Description

technical field [0001] The invention relates to the technical field of melt purification in a copper smelting process, in particular to a method for reducing manganese, an impurity element in waste yellow miscellaneous copper. Background technique [0002] With the rapid economic development of countries all over the world, mineral resources have become more and more important in the context of industrialization, marketization and economic globalization. China is the country with the largest consumption of copper resources in the world, but the amount of mineral reserves and the amount of economic exploitation are very low. China's dependence on foreign copper resources remains high, and the contradiction between raw material supply and consumption has become increasingly prominent. Solving the supply of copper raw materials The problem is urgent. [0003] With the process of urbanization, if the scrap copper as one of the "urban minerals" can be effectively utilized, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C9/04
CPCC22C1/06C22C9/04
Inventor 宋卡迪宋长洪汤亚钢杨东超李志国宋程程
Owner NINGBO CHANGZHEN COPPER CO LTD