Method for depleting refining slag of copper

A technology of copper refining and slag, which is applied in the field of copper refining slag depletion, can solve the problems of large proportion and waste of copper resources, and achieve the effect of simple production process operation and favorable recycling

Active Publication Date: 2011-08-24
NINGBO JINTIAN SMELTING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] From the above shows that Cu 2 O and CuO account for a large proportion, which is 58.16%, and copper accounts for 11.71% of the total slag, resulting in a waste of copper resources. How to reduce the copper content in the refining slag and improve the economic benefits of reclaiming coarse miscellaneous copper is a problem to be solved by the present invention. main technical issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Put 51,710kg of waste purple copper, 14,145kg of residual plate, 21,950kg of black copper block, a total of 87,805kg of raw materials into the melting furnace for melting. After all the furnace materials are melted, the oxidation operation is carried out: the furnace temperature is kept at 1250-1300°C, Insert the iron pipe coated with refractory mud at the pipe head into the copper liquid, blow in the air, the air pressure is 0.5-0.7Mpa, carry out the oxidation operation, gradually adjust the air volume according to the situation in the furnace, and take samples frequently for observation. When the section of the sample is observed to be brick red, add 1200kg of quartz sand to make slag. After 25 minutes, add 150 kg of carbonaceous reducing agent to cover the slag, then insert the iron pipe coated with refractory mud into the copper liquid, and blow in air at a pressure of 0.5-0.7Mpa. After stirring for 5 minutes , Remove the slag.

[0028] After analyzing the slag, th...

Embodiment 2

[0030] Add 54,770 kg of waste copper, 10,085 kg of residual plate, 22,050 kg of black copper block, and a total of 86,905 kg of raw materials into the melting furnace for melting. After all the furnace materials are melted, the oxidation operation is carried out: the furnace temperature is maintained at 1250-1300 ° C, Insert the iron pipe coated with refractory mud at the pipe head into the copper liquid, blow in the air, the air pressure is 0.5-0.7Mpa, carry out the oxidation operation, gradually adjust the air volume according to the situation in the furnace, and take samples frequently for observation. When the section of the sample is observed to be brick red, add 1000kg of quartz sand to make slag. After 25 minutes, add 120 kg of carbonaceous reducing agent to cover the slag, then insert the iron pipe coated with refractory mud into the copper liquid, and blow in air at a pressure of 0.5-0.7Mpa. After stirring for 10 minutes , Remove the slag.

[0031] After analyzing th...

Embodiment 3

[0033] Put 53070kg of waste purple copper, 15495kg of scrap plate, 18360kg of black copper block, a total of 86925kg of raw materials into the melting furnace for melting, after all the furnace materials are melted, carry out oxidation operation: keep the furnace temperature at 1250-1300℃, Insert the iron pipe coated with refractory mud at the pipe head into the copper liquid, blow in the air, the air pressure is 0.5-0.7Mpa, carry out the oxidation operation, gradually adjust the air volume according to the situation in the furnace, and take samples frequently for observation. When the section of the sample is observed to be brick red, add 1050kg of quartz sand to make slag. After 20 minutes, add 130kg of carbonaceous reducing agent to cover the slag, then insert the iron pipe coated with refractory mud into the copper liquid, and blow in air at a pressure of 0.5-0.7Mpa. After stirring for 10 minutes , Remove the slag.

[0034] After analyzing the slag, the copper content in ...

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Abstract

The invention discloses a method for depleting refining slag of copper. The method comprises the following steps of: adding recovered waste copper into a reverberatory furnace, heating and melting, inserting a blast pipe into molten copper to blow air, and stirring for oxidization with blasting to ensure that impurities are oxidized and partial copper is oxidized into cuprous oxide; taking a molten copper sample for observation, and adding quartz sand in an amount which is 1.2 to 1.4 percent of the weight of the total charging material for slagging when the section is brick red so as to ensure that the oxidized impurities in the molten copper such as Fe, Pb, Sn and the like and quartz react to form silicate slag; covering a carbonaceous reducing agent in an amount which is 0.13 to 0.17 percent of the total amount of the charged waste copper on the slag, inserting the blast pipe into the molten copper to blow the air, and stirring for 5 to 10 minutes, wherein a considerable amount of copper which enters a slag phase is reduced and enters a molten copper phase because copper is reduced more easily than other impurity elements. About 35 percent of copper content in the slag is reduced, and the method is favorable for recycling reclaimed copper resources. The production process is easy to operate, and the conventional production equipment can be directly utilized.

Description

[0001] technical field [0002] The invention relates to a method for depleting refining slag, in particular to a method for depleting refining slag by copper fire method. Background technique [0003] Copper fire refining refers to the method of oxidizing blister copper or red miscellaneous copper in a refining furnace to remove impurities and reducing smelting to refine copper. Since blister copper or red copper contains easily oxidizable impurities such as S, Fe, Pb, Zn, Ni, As, Sb, Sn, Bi, etc., these oxides are more 2 O is stable and has the characteristics of low melting. Therefore, during the heating and melting process of the refining furnace, compressed air or oxygen-enriched air is blown in first to form slag on the surface of molten copper in the form of oxides, or add special flux to make The slag is removed, or removed by volatilization of gas; other small amounts of impurities are distributed in copper water, and the oxygen that is blown into the air is Cu for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/14
CPCY02P10/20
Inventor 朱新昌申利民陈德强王立勤王可
Owner NINGBO JINTIAN SMELTING
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