Method for melting copper by using waste copper and concentrate of copper sulfide as raw materials

A technology of waste miscellaneous copper and copper sulfide, applied in the field of copper smelting, can solve the problems of short furnace life, low smelting intensity, frequent operation, etc., and achieve the effect of improving furnace processing capacity, complete separation, and reducing investment

Inactive Publication Date: 2010-09-29
XIZHI ELECTRONICS MATERIALS BRANCH YUNNAN COPPER IND GRP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of Kaldo furnace for treating waste miscellaneous copper has the disadvantages of low smelting intensity, intermittent operation, frequent operation, periodic changes in flue gas volume and flue gas composition, short furnace life, and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Annually process 40,000t of scrap copper with an average copper content of 50% and 200,000t of copper with 20%, iron with 19.7%, and SiO 2 11% copper sulfide concentrate as an example, specifically:

[0030] Waste miscellaneous copper, copper sulfide concentrate, quartz sand (SiO 2 content 85%), return materials (smoke containing 3% copper) are mixed at a mass ratio of 1:5:0.18:0.1, and the mixed material is put into the top-blowing furnace at 40 tons / h, and the volume concentration is 68%. Oxygen air according to 9800Nm 3 The amount per hour is blown into the molten pool with a spray gun to keep the melt in a strong stirring state, and anthracite (27MJ / kg) is added to control the temperature of the melt in the furnace to 1170-1210°C. Oxygen undergoes a strong oxidation reaction, and the reaction heat generated is the main source of smelting heat income. The insufficient part of heat energy is supplemented by the addition of anthracite fuel. The melt is intermittent...

Embodiment 2

[0032] Annually process 300,000 tons of waste miscellaneous copper containing 15% copper and 500,000 tons containing 21% copper, 22.6% iron, and SiO 2 9% Copper Sulfide Concentrate Example:

[0033] Waste miscellaneous copper, copper sulfide concentrate, quartz stone (SiO 2 content 90%), return materials (smog containing 2.8% copper) are mixed in a mass ratio of 1: 1.66: 0.14: 0.05, and the mixed charge is put into the ISA furnace at 120 tons / h, and the oxygen content is 72% ( volume concentration) of oxygen-enriched air at 13300Nm 3 The amount per hour is blown into the molten pool to keep the melt in a strong stirring state, and coke is added to control the temperature of the melt in the furnace at 1160°C to 1200°C, and the sulfur and iron elements in the melt have a strong interaction with the blown oxygen. Oxidation reaction, the reaction heat generated is the main source of smelting heat income, the insufficient part of heat energy is supplemented by the added coke, the...

Embodiment 3

[0035] Annually process 300,000 tons of waste miscellaneous copper containing 15% copper and 500,000 tons containing 21% copper, 22.6% iron, and SiO 2 9% Copper Sulphide Concentrate Example.

[0036] According to the mass ratio of scrap copper copper content: copper sulfide concentrate copper content = 1: 1.3, scrap copper and copper sulfide concentrate are mixed; according to the Fe in the mixture: SiO 2 =1:1.1 mass ratio, add quartz stone in the mixture; put the mixture into the ISA furnace at 120 tons / h, and feed oxygen-enriched air with an oxygen content of 85% (volume concentration) at 13300Nm 3The amount of / h is blown into the molten pool to keep the melt in a state of strong stirring, and heavy oil is added to control the temperature of the melt in the furnace to 1160 ° C ~ 1200 ° C, and the sulfur and iron elements in the melt have a strong interaction with the blown oxygen. Oxidation reaction, the reaction heat generated is the main source of smelting heat income, t...

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PUM

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Abstract

The invention discloses a method for melting copper by using waste copper and concentrate of copper sulfide as raw materials. The method comprises the following steps of: in a mass ratio of the copper content of waste copper to the copper content of the concentrate of copper sulfide of 1:1.3-10, mixing the waste copper and the concentrate of copper sulfide, adding a raw material containing silicon dioxide into the mixture, recycling, continuously putting the mixture into a melting pond, adding fuel and controlling the temperature of the melt to be between 1,100 and 1,300 DEG C, charging oxygen-enriched air, of which the volume concentration is 23 to 85 percent, in the melting pond, and stirring and melting the materials in an oxidizing atmosphere in the melting pond until slag and copper matte are separated by melting; transferring the separated copper matte to an air refining procedure for air refining to obtain raw copper products; transferring the slag to a common electric furnace for melting to further lower the copper content of the slag to below 0.5 percent, and performing water quenching of the slag; and transferring smoke to an acid-making procedure for preparing sulfuric acid. By the method, a large amount of waste copper can be treated, and simultaneously due to the adoption of the waste copper, the slag type of the concentrate of copper sulfide in melting is improved.

Description

technical field [0001] The invention relates to a copper smelting method, in particular to a copper smelting method using scrap copper and copper sulfide concentrate as raw materials, and belongs to the technical field of nonferrous metal metallurgy. technical background [0002] The current pyro-smelting process of copper sulfide concentrate is: (roasting →) smelting → blowing → refining. The smelting furnaces used are traditionally reverberatory furnaces or electric furnaces. The emerging furnace types include flash furnaces, Noranda furnaces, Issa Furnace, Osmet Furnace, Vanyukov Furnace, Teni Ent Furnace, Keef Sait Furnace, Silver Furnace, Shuikoushan Furnace and so on. In recent years, with the intensification of the smelting process, especially the use of oxygen enrichment, the Fe in the slag produced by the top-blowing, bottom-blowing or side-blowing furnace 3 o 4 The content increases greatly, sometimes as high as about 15%, which increases the difficulty of subseq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00
CPCY02P10/20
Inventor 王勇沈强华陶永和刘中华崔宁陈雯熊振昆阴树标魏涛朱学云高峰
Owner XIZHI ELECTRONICS MATERIALS BRANCH YUNNAN COPPER IND GRP
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