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A method for energy saving of low-grade copper smelting up-leading electrical copper rods

A low-grade, copper smelting technology, applied in the direction of improving process efficiency, etc., can solve the problems of a large amount of scrap copper raw materials, difficult energy-saving smelting methods, energy waste, etc.

Active Publication Date: 2016-08-31
江西泰和百盛实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, several years have passed, so far the combination of shaft furnace and reverberatory furnace in the copper processing material industry can only smelt electrolytic residual electrodes with a purity of 99.90% and above, and smelt them into anode plates, such as the invention patent "electrolytic residual electrode Fire Recycling New Technology", Publication No. CN101654792A, Publication Date: February 24, 2010; In the copper processing materials industry, the equipment combining shaft furnace and reverberatory furnace has not yet been able to smelt scrap copper, and the existing scrap copper is still only The reverberatory furnace with serious energy waste can be used in smelting
[0003] The reason why it is very difficult to develop an energy-saving smelting method suitable for waste miscellaneous copper raw materials is that this research and development requires a large amount of investment, and it will cost several million yuan to build a test equipment system with a shaft furnace plus a reverberatory furnace. It costs about 2 million yuan to test the raw materials of the furnace equipment system once

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020]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, 4 reduction furnaces and updraft equipment; Heavy oil; Shaft furnace continuously melts 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, and moves the tundish to the side of the oxidation furnace , remove the slag, and pour the molten copper in the tundish into the oxidation furnace to clean up the slag at the bottom of the tundish; the molten copper completes the oxidation process in the oxidation furnace, and then passes through the copper discharge port reserved in the oxidation furnace, covered and kept warm The chute transfers the copper melt to the reduction furnace, where the reduction proc...

Embodiment 2

[0023] 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 high-quality electrical copper rods, with an average copper and silver content of 99.90wt%, and the average index converted into standard coal is 62.5kg after statistics of natural gas consumption standard coal / t electrical copper rod.

Embodiment 3

[0025] 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 high-quality electrical copper rods, and the average copper and silver content is 99.92wt%. After statistics of natural gas consumption, it is converted into an average index of standard coal It is 57.5kg standard coal / t electrical copper rod.

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Abstract

An energy-saving method for smelting electrical-purpose copper rods utilizing low-grade copper through the adoption of an up-casting method belongs to the technical field of copper fabrication. Through the conventional equipment with shaft furnaces and the conventional technologies, the low-grade copper material cannot be smelted. Through the adoption of the method, shaft furnace combustors can be controlled to generate circulating high temperature combustion gas stream; the temperature of the circulating high temperature combustion gas stream and the temperatures of tundishes are controlled to control the combustion gas properties of a shaft furnace, oxidation furnaces, reduction furnaces and the tundishes, and the flowing manners of smoke dust and copper melt liquid, so that continuous energy-saving smelting of the copper rods utilizing the low-grade copper material through the adoption of the up-casting method is realized, and further, the advantage of high efficiency of the shaft furnace is fully given play and the capacity of electrical-purpose copper rod smelting utilizing low-grade copper is improved.

Description

technical field [0001] The invention relates to the technical field of copper processing, and relates to an energy-saving method for smelting low-grade copper and leading electrical copper rods. 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 restricted by the shortage of high-purity copper raw materials. Smelting qualified high-purity electrical copper rods from a large amount of scrap copper has become the key to overcome the development bottleneck. The existing main equipment for smelting electrical copper rods 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 of the reverberatory furna...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B15/00
CPCY02P10/20
Inventor 刘新才詹玉勇潘晶周暾
Owner 江西泰和百盛实业有限公司
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