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An environmentally friendly method for smelting high-quality anode plates from low-grade copper

A low-grade, anode plate technology, used in rotary drum furnaces, crucible furnaces, furnaces, etc., to achieve significant social benefits

Inactive Publication Date: 2016-06-08
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there has been no research and development of dioxin emission reduction technology in copper reverberatory furnace smelting dust

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Raw miscellaneous copper with a copper content of 60.0wt% and blister copper smelted with copper matte; the configuration of low-cost equipment is 1 shaft furnace, 2 tundishes, 4 oxidation furnaces, and 4 reduction furnaces; heavy oil is used as fuel; shaft furnace Continuous melting of low-grade copper, the tundish collects the low-grade copper melt to the rated capacity, then suspends the melting of the shaft furnace, opens the tundish insulation cover, separates the tundish from the bottom of the shaft furnace, moves the tundish to the side of the oxidation furnace, removes slag, And pour the molten copper in the tundish into the oxidation furnace to clean the slag at the bottom of the tundish; the molten copper completes the oxidation process in the oxidation furnace, and then melts the copper through the reserved copper discharge port and the heat preservation chute of the oxidation furnace The liquid is transferred to the reduction furnace, and the reduction proces...

Embodiment 2

[0027] The raw material is scrap copper with a Cu content of 72.8wt% and sub-crude copper smelted from scrap copper; the fuel is natural gas; dry oxygen-enriched gas with 85% oxygen is connected to the top blowing of the uniform injector, the temperature of the circulating high-temperature gas flow is 1360°C, and the temperature of the heat preservation chute is The reducing gas is at 1250°C; the height between the joint of the shaft furnace dust insulation pipe and the shaft furnace to the bottom of the shaft furnace accounts for 55% of the height of the entire shaft furnace, above this junction, the inner wall of the shaft furnace and the low-grade The gap between the copper raw materials is smaller than the gap between the inner wall of the shaft furnace and the material column of the shaft furnace below the junction. The control of the high-temperature blower of the shaft furnace prevents the smoke and dust from escaping from the top of the shaft furnace; During this proces...

Embodiment 3

[0029]The raw material is scrap copper with a Cu content of 88.3wt% and sub-crude copper smelted from scrap copper; the fuel is natural gas; dry oxygen-enriched gas with 75% oxygen is connected to the top blowing and side blowing of the uniform injector, and the temperature of the circulating high-temperature gas flow is 1340 ° C, The reducing gas in the heat preservation chute is at 1240°C; the smoke from the shaft furnace enters the redox furnace and burns through the burner of the redox furnace. Furnace soot enters the soot comprehensive treatment system along with the redox furnace soot. During this process, the shaft furnace soot experiences 857°C and 6.3s, of which the temperature above 1130°C is 4.1s; The temperature is 530°C. On the one hand, the dust inlet of the cyclone quenching dust collector is bypassed with high-pressure dry cold air, which is rapidly and fully mixed with the dust and cooled, and at the same time drives the mixture of smoke and dust to rotate at a...

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PUM

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Abstract

The invention relates to an environment-friendly method for smelting a high-quality anode plate from low-grade copper and belongs to the technical field of copper processing. When scrap copper is smelted by virtue of the existing independent redox furnace and the dust integrated treatment system, the dust discharged into air is up to 30mg / m<3>, however, 80-95% of dust is PM2.5 fine particulate matters and contains more toxic dioxin, which is extremely unadapted to increasingly strict requirement on the concentration of fine particles. By the method, the smelting of the high-quality anode plate from the low-grade copper raw material by virtue of a shaft-furnace-containing device is possible, the advantages of high efficiency of the shaft furnace is given full play, the productivity of smelting the high-quality anode plate from low-grade copper is increased; and by virtue of the dust integrated treatment system disclosed by the invention, the purposes that the concentration of dust in the industrial waste gas discharged from continuous smelting of high-quality anode copper plate from the low-grade copper raw material is less than 0.500mg / m<3> and dioxin cannot be detected are achieved.

Description

technical field [0001] The invention relates to the technical field of copper processing, and is an environment-friendly method for smelting high-quality anode plates with low-grade copper. Background technique [0002] On the one hand, the pollution control of heavy metal smelting smoke and dust has made great progress after a lot of arduous efforts. The dust concentration in the copper reverberatory furnace smelting smoke and dust has reached 30mg / m 3 , better than GB907-1996 stipulates that copper smelting reverberatory furnace dust is less than 200mg / m 3 standard value. However, the existing research results show that when the dust concentration reaches 30mg / m 3 80-95% of the dust in the air is PM2.5 fine particles. [0003] On the other hand, in the past two decades, copper processing has grown at a double-digit rate in my country every year. Copper processing products have played an increasingly important role in my country's national economy and high-tech fields, b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/00
Inventor 刘新才王艳潘晶周暾
Owner NINGBO UNIV
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