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Oxygen-rich side-blowing molten pool copper and sulfonium melting production technology and three-side blown melting furnace

A smelting furnace and copper matte technology, which is applied in the production process field of smelting copper concentrate into copper matte with high-concentration oxygen-enriched air, can solve the problems of a large amount of flux added, a large amount of slag output, and waste of copper resources. The effect of less slag output, reducing copper content in slag and improving smelting strength

Inactive Publication Date: 2015-05-20
杨文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This slag-type quartz stone and limestone have a large amount of flux added and a large amount of slag output
[0005] 2) The recovery rate of copper is low
[0006] Although the slag of the oxygen-enriched side-blowing smelting process currently in use has been depleted by electric furnaces, the copper content in the waste slag is above 0.48%. If the operation is not well controlled, the loss of copper will be even greater; Mined copper resources are getting less and less, and the currently mined low-grade copper ore is only about 0.4%. It can be seen that the waste slag containing more than 0.48% copper will cause a great waste of copper resources
[0007] 3) There are many carbonaceous fuels that need to be supplemented, CO 2 large emissions
The high-temperature liquid slag takes away a lot of heat, and the smelting process needs to add about 5% carbonaceous fuel to supplement the lack of heat. The corresponding CO 2 Emissions are also large

Method used

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  • Oxygen-rich side-blowing molten pool copper and sulfonium melting production technology and three-side blown melting furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 As shown, a fixed three-side blowing smelting furnace includes a furnace body 1, an oxygen-enriched air inlet 2, a secondary air outlet 3, a flue 4, a copper matte outlet 5, and a slag discharge outlet 6. The furnace body It is divided into a smelting zone 7 and a settling zone 8. There is a feed inlet 9 on the furnace body at the top of the smelting zone 7. The furnace body on both sides and one end of the smelting zone 7 is equipped with an oxygen-enriched air inlet 2 and an oxygen-enriched air inlet. 2 Located 0.5m below the top surface of the slag layer or between the slag layer and the copper matte layer, high-concentration oxygen-enriched air is blown into the furnace body from the oxygen-enriched air inlets 2 on both sides and at the end of the smelting zone 7 to participate in the smelting reaction, smelting The upper part of the melt on both sides of zone 7 is provided with secondary tuyeres 3, and ordinary air is blown into the furnace from se...

Embodiment 2

[0031] The melting furnace is the same as in Example 1.

[0032] Firstly, raw materials such as copper concentrate, quartzite flux, slag concentrate and copper-containing materials are adjusted to S / Cu1.5 to produce slag Fe / SiO 2 The ratio of 1.8 is required to be metered and sent to the mixing bin. The mixed material is fed into the melting furnace from the feed port 9 on the top of the furnace body, and air with an oxygen-enriched concentration of 75% is blown in, and the blast pressure is 0.15Mpa. The top negative pressure is -150~-200Pa, the flue gas temperature is about 1300°C, the slag temperature is 1280±50°C, the temperature of the copper matte produced is 1180±20°C, the mixed furnace charge is oxidized by oxygen-enriched air to form slag, and the copper matte and slag produced Sedimentation and separation are carried out in a relatively static settling area, and the copper matte with a large specific gravity settles to the bottom of the furnace and flows out from the ...

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Abstract

The invention discloses a fixed type three-side blown melting furnace structure, which is an improvement of a melting furnace, and is characterized in that high density oxygen-rich air is blown in the furnace from three directions of two sides of a three-side blown melting furnace and a termination part for participating in a melting reaction, the invention also discloses a production technology for melting oxygen-rich side-blowing molten pool copper and sulfonium, the production technology comprises the following steps: 1) proportioning of furnace charge; 2)melting by the high oxygen-rich three-side blown melting furnace; and 3) flotation of furnace slag. According to the invention, the currently used oxygen-rich side blowing melting furnace employs the technology that high silicon calcium three-component system slag and melting furnace slag pass through an electric furnace depletion treatment, two component system high iron slag and melting furnace slag employ a flotation treatment, high iron slag and melting furnace slag employ the flotation treatment during the melting process, so that the production technology has the advantages that the flux addition and fuel consumption are less, production and operation cost are low, slag output quantity and CO2 discharge capacity are less, environmental protection effect is good, copper comprehensive recovery rate is high, and melting intensity and production power of copper / sulfonium per unit area is high.

Description

technical field [0001] The invention relates to a production process and equipment for ore copper smelting, in particular to a production process for smelting copper concentrate into copper matte through high-concentration oxygen-enriched air in a fixed three-side blowing melting pool melting furnace. Background technique [0002] The oxygen-enriched side-blown smelting furnace process currently in use is all high-silicon-calcium ternary slag type. The smelting slag is directly sold after being depleted in an electric furnace. The oxygen-enriched air is blown into the furnace from both sides of the furnace. involved in the melting reaction. The disadvantages of this process are: [0003] 1) A large amount of flux is added and a large amount of slag is produced [0004] In the oxygen-enriched side-blown smelting furnace process currently in use, the smelting slag is directly discarded after being diluted in an electric furnace, and the copper content in the discarded slag i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/00F27B14/08
Inventor 杨文
Owner 杨文