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Copper smelting method

A copper concentrate and process technology, applied in the field of copper refining, can solve problems such as increased manufacturing costs

Inactive Publication Date: 2009-12-09
PAN PACIFIC COPPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in the technology in above-mentioned each patent document, need the coke as auxiliary fuel
So the manufacturing cost increases

Method used

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Experimental program
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Effect test

Embodiment approach

[0027] figure 1 It is a schematic diagram of the flash furnace 100 used in one embodiment of the copper refining method. Such as figure 1 As shown, the flash furnace 100 has a structure in which the reaction tower 10, the clarifier 20, and the ventilation pipe 30 are arranged in this order. A concentrate burner 40 is provided on the upper part of the reaction tower 10 .

[0028] figure 2 It is a copper refining process diagram using the flash furnace 100. First, if figure 2 As shown in (a), copper concentrate, silicate ore and oxygen-enriched air are simultaneously blown in from the concentrate burner 40 . Thus, through the following reaction formula (1), the copper concentrate undergoes an oxidation reaction, such as figure 2 As shown in (b), the bottom of the reaction tower 10 is separated into a sediment 50 and a slag 60 . In addition, in the following reaction formula (1), Cu 2 S·FeS is equivalent to the main component of the sinking pad, FeO·SiO 2 Equivalent t...

Embodiment 1～ Embodiment 4

[0040]In Examples 1 to 4, pig iron was supplied to slag without supplying a coke material as a heat source. Used as pig iron containing 90% to 96% by weight of Fe, 2% to 6% by weight of C, 1% to 5% by weight of copper, actual specific gravity of 3 to 8, and particle size of 0.3mm to 8mm Left and right cast iron. Table 1 shows the amount of pig iron added, the S / Cu weight ratio in the copper concentrate, the oxygen concentration in the oxygen-enriched air, the copper grade in the mat and the copper grade in the slag. In addition, in Table 1, the addition amount of pig iron is represented by the addition amount of pig iron per 1 ton of the total amount of the copper concentrate, the silicate ore, and the mixture of furnace circulating material etc. added to a flash furnace.

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Abstract

The present invention is to provide a copper smelting method by which generation of Fe3O4 is restrained while the production costs are lowered. A copper smelting method includes: supplying an oxygen-enriched gas, a solvent, and a copper concentrate into a furnace, while not supplying a coke material; and supplying pig iron to slag that is generated in the furnace. Other copper smelting method comprises: supplying a copper concentrate having a sulfur / copper weight ratio of 0.85 to 1.15, and an oxygen-enriched gas into a furnace; and supplying pig iron to slag that is generated in the furnace. Other copper smelting method comprises: supplying an oxygen-enriched gas, and a copper concentrate into a furnace; supplying pig iron to slag that is generated in the furnace; and adjusting a copper grade in matte generated in the furnace to 64 to 69 wt. %.

Description

technical field [0001] The invention relates to a copper refining method. Background technique [0002] In the pyro-refining process of copper, the oxygen supply balance between raw materials such as copper concentrate and silicate ore supplied to the furnace may collapse, and oxygen may become excessive relative to the raw materials. In this case, ferric oxide (Fe 3 o 4 ). Fe 3 o 4 layer and contains a lot of Fe 3 o 4 The layer of slag has a higher melting point than the surrounding slag, so it does not become a liquid phase but remains in a semi-molten state in the furnace, blocking the slag hole and becoming an obstacle to furnace operations such as reducing the furnace volume. In addition, a large amount of Fe 3 o 4 The layer has high viscosity, which may hinder the settling and separation of valuable metals such as copper suspended in the slag, resulting in deterioration of the recovery rate of valuable metals. [0003] Therefore, in the fire refining of coppe...

Claims

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Application Information

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IPC IPC(8): C22B15/14
CPCC22B15/0047C22B5/04C22B15/0052C22B15/0054C22B15/00
Inventor 本村龙也铃木义昭高桥政晴星光政
Owner PAN PACIFIC COPPER CO LTD