Method for separating copper-containing solid waste

A separation method and technology of water content, applied in the direction of improving process efficiency, can solve the problems of limited processing capacity and poor adaptability of raw materials, and achieve the effect of reducing the amount of flux and reduction used, high recovery rate, and inhibiting decomposition.

Active Publication Date: 2020-09-11
CHINA ENFI ENGINEERING CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process can only treat copper-containing sludge with low sulfur content alone, and the S content in most copper-containing sludge is higher than 2%. Negative impact, it is difficult to mix a large proportion of copper-containing sludge, the raw material adaptability of the process is poor, and the processing capacity is limited

Method used

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  • Method for separating copper-containing solid waste
  • Method for separating copper-containing solid waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The pretreated copper-containing solid waste particles are directly dropped into the feeding area 1 of the melting pool 1 through the feeding port 3 of the oxidation side-blowing furnace 10, and the spray guns 2 on the side wall and bottom of the feeding area 1 spray coal powder and Oxygen-enriched (the volume concentration of oxygen is 86.96%), the temperature of the molten pool is 1200-1300 ° C, since the side wall and bottom of the feeding area I are equipped with spray guns, the number of spray guns is large, the heating intensity and the stirring intensity of the molten pool are large, and the copper is contained The solid waste melts in the feeding zone I of the molten pool 1, and then enters the intermediate transition zone II. The spray gun 2 at the bottom of the intermediate transition zone II injects coal powder and oxygen-enriched into the molten pool to maintain the temperature of the molten pool, and the agitation of the molten pool gradually tends to Relax,...

Embodiment 2

[0063] The same as the method of Example 1, the difference is that the blown oxygen-enriched volume concentration is 95.79%, and the O in the flue gas 2 The volume content is 7.3%.

[0064] 55kg of anthracite and 13Nm of air are consumed per ton of copper-containing solid waste 3 (partially used as anthracite carrier gas), oxygen 180Nm 3 , 270kg of gypsum melt and 400kg of molten slag can be produced. The main components of gypsum and slag are shown in Table 4, in terms of mass percentage.

[0065] Table 4

[0066] Element Cu Fe S Ni CaO SiO 2

upper plaster 4.77 2.54 17.66 0.22 40.61 0.75 lower slag 38.18 15.88 0.76 4.51 12.76 7.92

[0067] The molten slag in the lower layer is poured into the side-blown smelting furnace, and 120 kg of anthracite and 95 kg of silica are added to each ton of slag, and 450 kg of black copper and 480 kg of tailing slag can be obtained by reducing and smelting per ton of slag. Mass percentage ...

Embodiment 3

[0073] The same as the method of Example 1, the difference is that what the spray gun sprays is oxygen, and the O in the flue gas 2 The volume content is 9.76%.

[0074] 50kg of anthracite and 3Nm of air are consumed per ton of copper-containing solid waste 3 (as anthracite carrier gas), oxygen 160Nm 3 , 270kg of gypsum melt and 400kg of molten slag can be produced. The main components of gypsum and slag are shown in Table 6, in terms of mass percentage.

[0075] Table 6

[0076] Element Cu Fe S Ni CaO SiO 2

upper plaster 4.37 2.79 18.21 0.25 39.61 0.97 lower slag 38.72 14.81 0.96 4.87 13.98 8.76

[0077] The molten slag in the lower layer is poured into the side-blowing smelting furnace, and 110kg of anthracite and 85kg of silica are added to each ton of slag, and 460kg of black copper and 480kg of tailing slag can be obtained by reduction smelting per ton of slag. percentage meter.

[0078] Table 7

[0079] E...

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Abstract

The invention discloses a method for separating copper-containing solid waste. The method comprises the following steps of a, performing copper-containing solid waste granulation and drying pretreatment to obtain copper-containing solid waste particles; and b, placing the copper-containing solid waste particles into an oxidation side blown converter melting pool, wherein the oxidation side blown converter melting pool temperature is 1200-1300 DEG C, melting the copper-containing solid waste particles to obtain an upper-layer gypsum melt and lower-layer copper-containing molten slag. Accordingto the method, the copper-containing solid waste with high calcium, high sulfur, low silicon and low iron characteristics can be treated, the raw material pretreatment requirement is low, the problemsof high temperature, high energy consumption, a large amount of smoke, large organic matter volatilization amount and the like of deep drying pretreatment are avoided, and the method has the remarkable energy-saving and consumption-reducing effects, and has the high treatment capacity for the copper-containing solid waste.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a method for separating copper-containing solid waste. Background technique [0002] Due to the use of large amounts of sulfuric acid in the electroplating industry, lime is used to neutralize the sediment during sewage treatment. The resulting precipitate contains not only a large amount of copper oxide, but also more calcium sulfate. After the sludge is preliminarily dried, it is mainly composed of CuO and CaSO 4 Mainly, the copper-containing solid waste is generally mixed with other copper-containing solid waste, flux, etc. to make blocks or pellets, and then reduced and smelted in a side-blowing furnace or a blast furnace. When black copper is produced, there is still a part of matte, which is easy to form a melt Stratification, separation is not complete, slag is easy to be mixed with sulfide, and the black copper and matte produced need to be sepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B15/00C22B1/24C22B23/02C04B2/10
CPCC22B7/001C22B15/003C22B15/0004C22B1/24C22B23/02C04B2/10C04B2/005Y02P10/20
Inventor 王云陈学刚王书晓郭亚光裴忠冶李冲祁永峰
Owner CHINA ENFI ENGINEERING CORPORATION
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