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Process for refining raw copper bynon-oxidizing nitrogen-doping reducing pyrometallurgy

A pyro-refining, non-oxidizing technology, applied in the field of blister copper pyro-refining, can solve the problems of high energy consumption, low production efficiency, long operation period, etc. Effect

Inactive Publication Date: 2003-01-15
JINLONG COPPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this method is generally adopted in the crude copper pyro-refining process of copper smelters at home and abroad. The main disadvantage of this method is that oxidation and reduction are two opposite operating processes, with long operating cycles, low production efficiency, high energy consumption, and black smoke. serious pollution

Method used

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  • Process for refining raw copper bynon-oxidizing nitrogen-doping reducing pyrometallurgy
  • Process for refining raw copper bynon-oxidizing nitrogen-doping reducing pyrometallurgy
  • Process for refining raw copper bynon-oxidizing nitrogen-doping reducing pyrometallurgy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as image 3 As shown, the liquid blister copper is put into the rotary anode furnace (10), and after blowing nitrogen into the slag, the waste nitrogen discharged from the oxygen station is transported into the nitrogen tank (3) for storage through the nitrogen compressor (2). When smelting operation, first open the N 2 Adjust the valve (8), reduce the nitrogen gas to 0.35 ~ 0.40Mpa through the pressure reducing valve (4), and use the heater (5) to heat, observe the pressure gauge (6) and flow meter (7), and turn the anode furnace (10) , so that the spray gun (11) is buried at 600-800 mm below the copper liquid surface, and then the regulating valve (1) (1) (valve degree 50%) is opened to make the reducing agent and N 2 Fully mixed in the mixing container (9), then adjust the valve (1) and valve (8) reasonably to the required reducing agent and N 2 flow, so that N 2 / reducing agent=1.0-1.5, carry out the reduction operation to the end.

Embodiment 2

[0040] Such as Figure 4 As shown, when refining blister copper in a rotary anode furnace, in order to more effectively enhance the stirring performance of molten copper and improve the reaction kinetics conditions, several porous plug air bricks (16 ) (2 in this embodiment), so that N 2 + The reducing agent is sprayed into the melt from the bottom of the furnace. And according to the height of the copper liquid level, reasonably control the N 2 pressure.

Embodiment 3

[0042] Such as Figure 5 As shown, when the reflective anode furnace (15) is used, the flow of the reducing agent is adjusted through the regulating valve (1), and the flow rate of the gear flow meter (13) is observed, so that the reducing agent enters the inner cavity of the nozzle (14). Nitrogen is transported to the gas storage tank (3) through the nitrogen compressor (2) for storage. When in use, it is adjusted to a reasonable nitrogen flow value (generally Control is N 2 / reducing agent=1.0-1.3) nitrogen is sent to the outer chamber of the nozzle (14), so that the reducing agent is fully mixed in the mixing chamber at the front end of the nozzle. Due to the high-pressure impact of nitrogen, the reducing agent quickly becomes dispersed and sprayed into the copper liquid in the reverberatory furnace (15) to enter the reduction operation, thereby improving the reduction efficiency.

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Abstract

A technology for refining crude copper features that at the blowing stage in converter, the contents of S and O in discharged copper are reasonably controlled, the nitrogen instead of air is used for discharge slags, and at reducing stage the nitrogen gas is proportionally added to reducer. Its advantages are simple operation, short period, high productivity, less energy consumption and no smoke pollution.

Description

(1) Technical field [0001] The invention relates to a blister copper pyro-refining process, in particular to a blister copper non-oxidizing nitrogen-doped reduction pyro-refining process. (2) Background technology [0002] The world mineral copper pyrometallurgical smelting process is generally "copper sulfide concentrate - smelting into matte - blowing into blister copper - pyro-refining into anode copper - electrolysis into high-purity cathode copper". Before blister copper enters the electrolysis process, it must generally be refined by anode furnace fire to produce an anode plate whose chemical composition and physical specifications meet the requirements of electrolysis. The traditional pyro-refining process is the oxidation-reduction method. This process is mainly to pour the liquid crude copper blown into the anode furnace into the anode furnace, blow in air (or oxygen-enriched air) for oxidation, and generate oxides from impurities to form slag or ...

Claims

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Application Information

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IPC IPC(8): C22B15/14
Inventor 周松林黄永峰
Owner JINLONG COPPER
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