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Side-blowing reduction method for flash smelting furnace

A flash smelting furnace and slag smelting technology, which is applied in electric furnaces, crucible furnaces, rotary drum furnaces, etc., can solve the problems of difficult handling of tailings in flash smelting furnaces, reduce entrainment loss of copper matte, accelerate reaction speed, and wash away small effect

Pending Publication Date: 2022-04-19
广西金川有色金属有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the flash smelting furnace tailings are difficult to deal with in the prior art, the present invention provides a flash smelting furnace side-blowing reduction method, through which the copper content in the flash smelting slag is reduced to below 0.8%

Method used

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  • Side-blowing reduction method for flash smelting furnace
  • Side-blowing reduction method for flash smelting furnace
  • Side-blowing reduction method for flash smelting furnace

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for flash smelting furnace side blowing reduction, comprising the following steps:

[0032] (1) Equipment installation

[0033] Such as figure 1 As shown, the vertical water jacket 3 and the horizontal plane are at an inclination angle of 10° through the furnace coaming plate 4, and then the bolts and the coaming fixing bolt holes 307 of the vertical water jacket 3 are pressed and fixed on the furnace wall of the smelting furnace. The outside of the body enclosure plate 4 fixes the vertical water jacket 3 with the refractory material 5 in the flash smelting furnace through steel beams; , so that the water jacket 2 of the gun seat is inclined at an angle of 10° to the horizontal plane, and finally insert the spray gun 1 from the reduction hole 203 of the water jacket 2 of the gun seat to complete the equipment installation;

[0034] in:

[0035] Described spray gun 1 is as figure 2 As shown, it includes a nitrogen nozzle 101, a reduction nozzle 102, a nitro...

Embodiment 2

[0047] A method for flash smelting furnace side blowing reduction, comprising the following steps:

[0048] (1) Equipment installation

[0049] Same as Example 1.

[0050] (2) Production conditions

[0051] In the flash smelting furnace, feed at 270t / h to produce liquid smelting slag layer 6 and liquid copper matte layer 7. When the liquid smelting slag layer 6 rises to 1200mm, that is, at the lower edge of the gun seat water jacket 2, take samples Test, according to test data to get Cu and Fe in smelting slag 3 o 4 content, calculate the amount of required theoretical reducing agent; wherein the liquid smelting slag layer 6 contains 1.8% copper, Fe 3 o 4 The content is 12%, the smelting slag rate is 50%, the nitrogen gas supply pressure is 0.5MPa, the reducing agent is natural gas, the gas supply pressure is 0.25MPa, and the natural gas reduction utilization rate is 50%.

[0052] (3) Process calculation

[0053] The amount of flash smelting slag is 135t / h, and the smel...

Embodiment 3

[0058] A method for flash smelting furnace side blowing reduction, comprising the following steps:

[0059] (1) Equipment installation

[0060] Same as Example 1.

[0061] (2) Production conditions

[0062] In the flash smelting furnace, feed at 270t / h to produce liquid smelting slag layer 6 and liquid copper matte layer 7. When the liquid smelting slag layer 6 rises to 1200mm, that is, at the lower edge of the gun seat water jacket 2, take samples Test, according to test data to get Cu and Fe in smelting slag 3 o 4 content, calculate the amount of required theoretical reducing agent; wherein the liquid smelting slag layer 6 contains 1.2% copper, Fe 3 o 4 The content is 8%, the smelting slag rate is 50%, the nitrogen gas supply pressure is 0.5MPa, the reducing agent is natural gas, the gas supply pressure is 0.25MPa, and the natural gas reduction utilization rate is 50%.

[0063] (3) Process calculation

[0064] The amount of flash smelting slag is 135t / h, and the smelt...

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Abstract

The invention discloses a side-blowing reduction method for a flash smelting furnace, which comprises the following steps of: firstly, pressing and fixedly mounting a vertical water jacket on a furnace wall of the smelting furnace, then fixing a gun seat water jacket on the vertical water jacket, and finally, inserting a spray gun from the gun seat water jacket to finish equipment mounting; the method comprises the following steps: feeding materials into a flash smelting furnace for production, sampling and testing when a liquid smelting slag layer rises to 1200mm, calculating the dosage of a required theoretical reducing agent, opening valves of nitrogen and reducing agent supply pipelines, and performing side-blowing reduction on the liquid smelting slag layer in the flash smelting furnace; and sampling, testing and analyzing, adjusting the consumption of the reducing gas according to the contents of Cu and Fe3O4 in the slag, and transferring to normal production until the test data meets the production requirements. According to the method, the natural gas is sprayed into the smelting slag layer through the reduction spray guns on the two sides of the flash smelting furnace body to reduce the smelting slag, the copper content of the smelting slag is controlled to be 0.8% or below, the flash smelting slag can serve as a production raw material of cast iron and copper-containing stainless steel, a subsequent dilution electric furnace or a slag selection process is omitted, and resource integration is achieved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a side blowing reduction method of a flash smelting furnace. Background technique [0002] After the flash smelting slag undergoes secondary beneficiation, impurity elements such as As and Bi in the slag cannot be completely removed during the beneficiation process, and some of them will return to the smelting furnace with the re-concentrated ore, which will affect the quality of the anode plate. Secondly, a large amount of tailings are produced. With the stricter environmental protection policies, the difficulty and cost of processing tailings are getting higher and higher, which may affect normal operations. In addition, the flash smelting slag contains more than 40% Fe, and is treated as solid waste along with the tailings. [0003] With the increasing shortage of iron ore resources, the price of iron ore will continue to rise, and smelting slag can be used as ...

Claims

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Application Information

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IPC IPC(8): C22B15/00C22B7/04C22B1/00C21B13/00
CPCC22B15/0047C22B7/04C22B7/001C22B1/005C21B13/00
Inventor 张建平许俊陈文武李钰平王取敏张更生王博
Owner 广西金川有色金属有限公司