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Bottom-top composite injection smelting reduction furnace for treating molten copper slag

A technology for melting copper and reduction furnaces, which is applied in electric furnaces, crucible furnaces, rotary drum furnaces, etc. It can solve the problems of low heat utilization rate and long reduction time, and achieve the effects of reducing labor intensity, reducing energy consumption, and stabilizing heat balance

Pending Publication Date: 2021-07-23
NORTHEASTERN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above scheme can reduce the copper slag, the reduction time is longer and the heat utilization rate is lower

Method used

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  • Bottom-top composite injection smelting reduction furnace for treating molten copper slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The structure of the bottom-top compound injection smelting reduction furnace for processing molten copper slag is as follows: figure 1 As shown, it includes a horizontal furnace body, molten copper slag inlet 1, feeding port 2, exhaust port 9, slag discharge port 10, iron discharge port 11, stirring device 3, first top blowing lance 4, second top blowing lance 5. The third top blowing spray gun 6, the fourth top blowing spray gun 7, the fifth top blowing spray gun 8, the first bottom blowing spray gun 16, the second bottom blowing spray gun 15, the third bottom blowing spray gun 14, the fourth bottom blowing spray gun 13 and the fifth bottom blowing lance 12;

[0043] The horizontal furnace body is composed of a horizontally placed cylinder and the heads at both ends;

[0044]The charging port 2 is located at the top of one side of the horizontal furnace body, and the exhaust port 9 is located at the top of the other side of the horizontal furnace body; Among them, t...

Embodiment 2

[0057] The structure of the bottom-top compound injection smelting reduction furnace for processing molten copper slag is the same as in Example 1;

[0058] Method is with embodiment 1, and difference is:

[0059] (1) Inject gas reducing agent into the horizontal furnace body through the bottom blowing lance;

[0060] (2) The amount of slagging agent is based on the binary basicity (CaO / SiO 2 ) is added at 1.2; the consumption of reducing agent is added by 1.3 times of the total amount required to complete the reduction reaction;

[0061] (3) Heating and controlling the molten pool to a temperature of 1500°C; the average residence time of the molten copper slag in the horizontal furnace body is 45 minutes;

[0062] (4) The copper-containing molten iron contains 0.84% ​​Cu by mass percentage.

Embodiment 3

[0064] The structure of the bottom-top compound injection smelting reduction furnace for processing molten copper slag is the same as in Example 1;

[0065] Method is with embodiment 1, and difference is:

[0066] (1) Inject gas reducing agent into the horizontal furnace body through the bottom blowing lance;

[0067] (2) The amount of slagging agent is based on the binary basicity (CaO / SiO 2 ) is added at 1.4; the consumption of reducing agent is added by 1.5 times of the total amount required to complete the reduction reaction;

[0068] (3) Heating and controlling the molten pool to a temperature of 1480°C; the average residence time of the molten copper slag in the horizontal furnace body is 50 minutes;

[0069] (4) The copper-containing molten iron contains 0.81% Cu by mass percentage.

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Abstract

The invention relates to a bottom-top composite injection smelting reduction furnace for treating molten copper slag. A horizontal furnace body consists of a barrel body and end sockets at two ends; a feeding port is located at the top of one side, and an exhaust port is located at the top of the other side; a slag discharge port and an iron discharge port are located on the end socket on one side of the exhaust port, the iron discharge port is located at the bottom, and the slag discharge port is located above the iron discharge port; a molten copper slag inlet is located at the upper part of the end socket on the side where the feeding port is located; a stirring paddle connected with the bottom of a stirring shaft of a stirring device is positioned below the axis of the horizontal furnace body; a plurality of top-blowing spray guns are arranged at the top of the horizontal furnace body, and a plurality of bottom-blowing spray guns are arranged at the bottom; and a gap is formed between a vortex area and the top-blowing spray guns in the horizontal direction, and the vortex area is located above the bottom-blowing spray guns. According to the device and the method of the invention, continuous treatment of the copper slag and efficient utilization of waste heat can be achieved, energy consumption is reduced, labor intensity is greatly reduced, and system energy is fully utilized.

Description

technical field [0001] The invention relates to the technical field of metallurgy and comprehensive utilization of copper slag, in particular to a bottom-top combined blowing smelting reduction furnace for processing molten copper slag. [0002] technical background [0003] Modern oxygen-enriched blowing not only strengthens the intensity of copper smelting, but also brings about a sharp increase in copper residue in smelting slag. Therefore, modern copper smelting processes have carried out depletion and recovery of copper on copper slag. There are two industrial methods for copper slag depletion and recovery of copper: slow cooling ore dressing and pyrolysis depletion smelting; but the current copper recovery rate is far from meeting the industrial demand. In principle, the mineral processing method can only recover most of the inclusion matte. Slag slow cooling ore dressing method: Slow cooling within the phase transition temperature (1080°C) will make the copper mineral ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B15/00C21B11/00
CPCC22B7/04C22B7/001C22B15/0054C22B15/0052C21B11/00
Inventor 张廷安豆志河吕国志韩继标刘燕张子木赫冀成
Owner NORTHEASTERN UNIV
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