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Method for producing copper sulphate and recycling ferro-nickel through vulcanization of albata waste by pyrite

A technology of copper-nickel sulfide and nickel-iron alloy, which is applied in the field of producing copper matte from pyrite copper-nickel sulfide alloy waste and recycling nickel-iron alloy, which can solve the problems of low copper ore mining capacity, low copper, and exhaustion of raw ore resources. Low maintenance cost, simple operation, and environmental protection in the process

Inactive Publication Date: 2017-09-12
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, my country's copper ore mining capacity is far lower than the smelting capacity, and only 3% of the deposits are large or larger; most of them are associated ores, and there are few single mines. More than 3 / 4 of the mined deposits are comprehensive deposits; The grade is very low, less than 1% on average, and many copper companies face the risk of depletion of raw ore resources

Method used

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  • Method for producing copper sulphate and recycling ferro-nickel through vulcanization of albata waste by pyrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Such as figure 1 As shown, the method for making copper matte from copper-nickel alloy waste of pyrite sulfide and reclaiming nickel-iron alloy is as follows: first, 30 g of copper-nickel-iron alloy waste (Cu70wt%, Ni27.7wt%, Fe2.3wt%) are crushed to After the piece size is 20-30mm and the moisture content is lower than 3%, when the copper-nickel-iron alloy waste is completely melted at 1400°C, under the condition of feeding inert gas (the inert gas is nitrogen, the flow rate is 300ml / min, spray Blowing pressure is 0.2MP), add 23.5g pyrite with moisture content less than 3%, 0.2~0.4mm (the ratio of sulfur in pyrite to copper S / Cu in copper-nickel-iron alloy scrap is 1.2 : 1. Pyrite is sprayed through the spray gun, and the injection pressure is 0.5MPa) to carry out the vulcanization reaction at a temperature of 1450°C for 1h, and continue to feed inert gas at 1450-1500°C for a heat preservation reaction for 60min. After the reaction, the copper matte and After the nick...

Embodiment 2

[0021] Such as figure 1 As shown, the method for making copper matte from pyrite sulfide copper-nickel alloy waste and reclaiming nickel-iron alloy is as follows: first, copper-nickel-iron alloy waste (Cu70wt%, Ni27.7wt%, Fe2.3wt%) is crushed to a block size 100 ~ 150mm, dried to less than 3% moisture, when the copper-nickel-iron alloy waste is completely melted at 1500 ℃, under the condition of feeding inert gas (the inert gas is argon, the flow rate is 500ml / min, spray Pressure is 1.5MP), add 31.5g of pyrite with water content less than 3%, 0.2-0.4mm (the amount of S / Cu of sulfur in pyrite and copper in copper-nickel-iron alloy scrap is 1.6:1, Pyrite is sprayed through the spray gun, the injection pressure is 1.5MPa) and the vulcanization reaction is carried out at a temperature of 1600°C for 3 hours, and the inert gas is continued to be introduced at 1550-1600°C for a heat preservation reaction for 60 minutes. After the reaction, the copper matte and nickel-iron moisture A...

Embodiment 3

[0024] Such as figure 1 As shown, the method for making copper matte from pyrite sulfide copper-nickel alloy waste and reclaiming nickel-iron alloy is as follows: first, copper-nickel-iron alloy waste (Cu70wt%, Ni27.7wt%, Fe2.3wt%) is crushed to a block size 250 ~ 300mm, dried until the moisture content is less than 3%, when the copper-nickel-iron alloy waste is completely melted at 1400 ℃, under the condition of feeding inert gas (the inert gas is argon, the flow rate is 800ml / min, spray Pressure is 1.0MP), add 27.55g of pyrite with water content less than 3% and 0.2-0.4mm (the amount of S / Cu of sulfur in pyrite and copper in copper-nickel-iron alloy scrap is 1.4:1, Pyrite is sprayed through a spray gun, and the injection pressure is 1.0MPa) and the vulcanization reaction is carried out at a temperature of 1400 ° C for 2.5 hours, and the inert gas is continued to be introduced at 1400 ~ 1450 ° C for a heat preservation reaction for 60 minutes. After layering, let stand for 0...

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Abstract

The invention relates to a method for producing copper sulphate and recycling ferro-nickel through vulcanization of albata waste by pyrite and belongs to the technical field of secondary resource comprehensive utilization. The method comprises the following steps: at first, crushing and drying copper ferro-nickel waste, when the copper ferro-nickel waste completely fuse, adding pyrite with the water content less than 3% for vulcanization reaction under the condition of feeding inert gas, continuously feeding inert gas for thermal insulation reaction, and after copper sulphate and nickle molten iron are layered after reaction, discharging copper sulphate and nickle molten iron separately to obtain copper sulphate and ferro-nickel. According to the method, pyrite is adopted as a vulcanizing agent, the situation that affinity of the sulfur element and copper is far greater than that of nickle and iron is fully utilized, separation is realized by utilizing density difference of copper sulphate and nickle molten iron, and the copper sulphate is recycled, so that copper in copper ferro-nickel waste is effectively recycled, and qualified ferro-nickel can be directly produced at the same time.

Description

technical field [0001] The invention relates to a method for producing copper matte from pyrite sulfide copper-nickel alloy waste and recovering nickel-iron alloy, belonging to the technical field of comprehensive utilization of secondary resources. Background technique [0002] my country is a country with relatively poor copper resources, and now it is in a period of important strategic opportunities for rapid economic development. With the acceleration of my country's urbanization process, it will undoubtedly pose a major challenge to the supply of copper resources. However, my country's copper ore mining capacity is far lower than the smelting capacity, and only 3% of the deposits are large or larger; most of them are associated ores, and there are few single mines. More than 3 / 4 of the mined deposits are comprehensive deposits; The grade of copper is very low, less than 1% on average, and many copper enterprises face the risk of depletion of raw ore resources. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00C22B23/02
CPCC22B15/0056C22B23/023C22B23/025Y02P10/20
Inventor 李磊王加运王华王宇
Owner KUNMING UNIV OF SCI & TECH
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