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Method for smelting low-sulfur copper concentrate

A smelting method and technology of copper concentrate, which is applied in the field of smelting low-sulfur copper concentrate, can solve the problems of hidden waste water pollution, high power consumption in electrowinning, and high production cost, and achieve short construction period, short process flow and low investment. little effect

Inactive Publication Date: 2011-09-14
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For complex copper concentrates produced by remote mines with inconvenient transportation and small production scale, wet pressure leaching technology is also used to recover copper. Simple process and low investment are the main advantages of wet copper smelting, but electrowinning High power consumption, high production costs, and hidden dangers of wastewater pollution are the main shortcomings of hydrometallurgy

Method used

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  • Method for smelting low-sulfur copper concentrate
  • Method for smelting low-sulfur copper concentrate
  • Method for smelting low-sulfur copper concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The main chemical components of copper sulfide concentrate are listed in Table 1.

[0039] Table 1 The chemical element composition of embodiment one copper sulfide concentrate

[0040]

[0041] Add 5% sulfur to the copper sulfide concentrate, continuously feed it into the fluidized fluidized furnace, feed air according to the air excess coefficient of 1.2, control the full oxidation roasting temperature within the range of 750-850 ° C, and the output flue gas passes through the waste heat boiler After treatment with electrostatic precipitator and bag filter, SO in the flue gas 2 The concentration is about 8%, and it is sent to sulfuric acid after purification; the obtained calcined sand and soot are combined to become roasted ore.

[0042] Table 2 Example 1 Copper sulfide concentrate fully oxidized roasting product ore chemical composition

[0043]

[0044] Add 20% lime and 8% powdered anthracite to the roasted ore according to the mass of the roasted ore. After ...

Embodiment 1

[0046] Table 3 Chemical Composition of Copper-Cobalt Alloy Product from Electric Furnace Melting in Example 1

[0047]

[0048] Table 4 Chemical Composition of Electric Furnace Smelting Slag in Example 1

[0049]

[0050] The electric furnace reduction smelting slag is water-quenched to a particle size of 3-20 mm, which can be stockpiled or used as road construction materials.

Embodiment 2

[0052] The main chemical components of copper sulfide and copper oxide mixed concentrate are listed in Table 5.

[0053] Table 5 The chemical element composition of embodiment copper disulfide and copper oxide mixed concentrate

[0054]

[0055] Add 8.2% sulfur to the mixed concentrate of copper sulfide and copper oxide, and continuously feed it into the fluidized furnace, and then feed the oxygen-enriched air with 28% oxygen according to the oxygen-enriched air excess coefficient of 1.1, and control the full oxidation roasting temperature at 780~ In the range of 900℃, after the flue gas produced is treated by the waste heat boiler, electric dust collector and bag dust collector, the SO in the flue gas 2 The concentration is about 7.6%, and it is sent to sulfuric acid after purification; the obtained calcined sand and soot are combined to become roasted ore.

[0056] Table 6 Example copper disulfide and copper oxide mixed concentrate fully oxidized roasted ore product chem...

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Abstract

The invention discloses a method for smelting low-sulfur copper concentrate, relating to copper concentrate, in particular to a method for producing rough copper or rough copper alloy from low-sulfur copper sulfide concentrate or copper sulfide concentrate comprising a part of copper oxide. The method is characterized by comprising the following smelting processes of: mixing sulfur or pyrite into the copper concentrate; performing boiling oxidizing roasting to produce calcine; performing reduction smelting on the calcine through an ore-smelting electric furnace to obtain rough copper or rough copper alloy; treating flue gas produced during the boiling oxidizing roasting and smelting of the ore-smelting electric furnace through a waste heat boiler, electrical dust collection and cloth bag dust collection; and feeding the treated flue gas into an acid making system to produce sulfuric acid. By adopting the method, the copper sulfide concentrate with low sulfur content and high silicon content or the copper sulfide concentrate comprising a part of the copper oxide, which cannot be subjected to self-heating matte smelting, can be treated; and the method has the advantages of a short process flow, less investment and a short construction period and is suitable for building small-scale copper smelting enterprises at electric power-rich areas.

Description

technical field [0001] A method for smelting low-sulfur copper concentrates, relating to a method for producing blister copper or blister copper alloys from copper concentrates, especially low-sulfur copper sulfide concentrates or copper sulfide concentrates containing partially oxidized copper. technical background [0002] Copper is a non-ferrous metal of strategic significance in the development of the world economy. It has become a bulk non-ferrous metal product second only to metal aluminum. It is widely used in construction, electronics, transportation, machinery manufacturing, daily consumer goods, aerospace, etc. , national defense and many other fields. With the acceleration of my country's industrialization process and the development of urbanization, copper extraction, smelting and processing production capacity has expanded rapidly, copper processing capacity has exceeded 10 million tons, and copper consumption has accounted for 40% of the world's total. Various...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B15/00C22B1/02C22B4/04
Inventor 王成彦李昌福尹飞陈永强李敦钫杨永强
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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