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Low-cost equipment energy-saving smelting method for low-grade copper raw materials

A smelting method and low-grade technology, applied in the field of energy-saving smelting with low-cost equipment, can solve problems such as the inability to smelt low-grade copper raw materials normally

Inactive Publication Date: 2015-02-11
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the actual situation that the existing shaft furnace plus reverberatory furnace cannot normally smelt low-grade copper raw materials, and to invent a method so that low-grade copper raw materials with a copper content of 60 wt% and above can be reduced by using a shaft furnace plus a reverberatory furnace. The cost equipment is normally smelted, and it has energy-saving effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Raw miscellaneous copper with a copper content of 60.0wt% and blister copper smelted with copper matte; low-cost equipment is configured with one shaft furnace and two redox furnaces; heavy oil is used as fuel, and the gas used to control the oxidation and reduction of the redox furnace Oxidation and reduction, the dust being reduced enters the bottom of the shaft furnace through the insulation pipe, switch, and high-temperature blower; the shaft furnace smoke enters the oxidation-reduction furnace next to the burner of the oxidation-reduction furnace through another insulation pipe, switch, and high-temperature blower; Oxidation fume from the reduction furnace converges to the main fume pipe through the discharge port, fume insulation pipe, and fume switch, and controls the opening of the fume switch of the redox furnace with reducing gas to a certain opening degree, so that part of the reductive fume and all the oxidative fume enter at the same time The main flue dust ...

Embodiment 2

[0020]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 others are the same as in Example 1; the above-mentioned low-cost equipment can normally smelt the anode plate, the average copper content is 98.95wt%, and the average index converted into standard coal is 61.1kg standard coal / t after statistics of natural gas consumption Anode plate.

Embodiment 3

[0022] 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 others are the same as in Example 1; the above-mentioned low-cost equipment can normally smelt the anode plate, the average copper content is 98.96wt%, and the average index converted into standard coal is 55.3kg standard through statistics of natural gas consumption. Coal / t anode plate.

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PUM

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Abstract

The invention relates to a low-cost equipment energy-saving smelting method for low-grade copper raw materials, and belongs to the technical field of copper processing. The exiting shaft furnace and oxidation reduction furnace cannot be used for smelting low-grade copper. The method has the advantages that a shaft furnace burner is controlled to form circulation high-temperature gas flow, the temperature of the circulation high-temperature gas flow and the temperature of a capped heat insulation chute are controlled, the gas property, the smoke dust flowing and the copper molten liquid flowing of a shaft furnace and an oxidation reduction furnace are controlled, and the continuous energy-saving smelting of anode plates from the low-grade copper raw materials by the low-cost equipment is realized.

Description

technical field [0001] The invention relates to the technical field of copper processing, and relates to an energy-saving smelting method using low-cost equipment for low-grade copper raw materials. Background technique [0002] Over the past two decades, copper processing has grown at a double-digit rate in my country every year, and copper processing products have played an increasingly important role in my country's national economy and high-tech fields. However, the development of my country's copper processing industry is limited by the shortage of high-purity copper raw materials. Smelting qualified high-purity anode plates from a large amount of scrap copper has become the key to overcome the development bottleneck. The existing main equipment for smelting anode plates is a reverberatory furnace, but the temperature of the flue dust at the outlet of the reverberatory furnace is about 1200°C, and more than 40% of the energy used for smelting the anode plate in the reve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/04C22B7/00
CPCY02P10/20
Inventor 刘新才潘建峰潘晶周暾
Owner NINGBO UNIV
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