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Smelting furnace soot treatment method

A treatment method and technology of a smelting furnace, applied in the field of waste resource treatment, can solve problems such as low recovery rate of valuable metals and failure to achieve expected purity of recovered products, and achieve high added value of products, high social benefits and economic benefits. Benefits, the effect of increasing the leaching temperature

Inactive Publication Date: 2015-11-11
谭建新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But all have the following disadvantages: pyromelting smelting will inevitably produce secondary pollution, the purity of recovered products has not reached the expected effect, and the recovery rate of valuable metals is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A method for processing soot from a smelting furnace, comprising the following steps:

[0025] (1) Reduction roasting, mixing soot and reducing agent, then roasting for 4 hours, the roasting temperature is 500°C;

[0026] (2) High-pressure oxygen leaching, add the leaching agent to the roasted material according to the mass ratio of 1:6, then mix it and put it into the autoclave, stir and react for 5 hours at a temperature of 125°C and a pressure of 0.6Mpa, and at the same time pass Oxygen, the amount of oxygen introduced is 0.25 times the mass of the material after roasting, the stirring speed is 400r / min, and the first leaching solution and the first leaching residue with a pH of 3 are obtained;

[0027] (3) The recovery of lead, the first leaching slag is added carbonate according to 1.4 times of lead molar ratio, reacted at 85 ℃ for 2 hours, the second leaching residue obtained by filtering is added nitric acid according to 1.3 times of lead molar ratio, at 55 Reac...

Embodiment 2

[0037] A method for processing soot from a smelting furnace, comprising the following steps:

[0038] (1) Reduction roasting, mixing soot and reducing agent, then roasting for 4 hours, the roasting temperature is 600°C;

[0039] (2) High-pressure oxygen leaching, add the leaching agent to the roasted material according to the mass ratio of 1:5, then mix it and put it into the autoclave, stir and react for 2 hours at a temperature of 130°C and a pressure of 0.4Mpa, and at the same time pass Oxygen, the amount of oxygen introduced is 0.2 times the mass of the material after roasting, the stirring speed is 400r / min, and the first leaching solution and the first leaching residue with a pH of 3.5 are obtained;

[0040] (3) The recovery of lead, the first leach slag is added carbonate according to 1.4 times of lead molar ratio, reacted for 2 hours at 85 DEG C, the second leach residue obtained by filtering is added nitric acid according to 1.4 times of lead molar ratio, at 50 React...

Embodiment 3

[0050] A method for processing soot from a smelting furnace, comprising the following steps:

[0051] (1) Reduction roasting, mixing the soot with a reducing agent, and then roasting for 5 hours at a roasting temperature of 400°C;

[0052] (2) High-pressure oxygen leaching, add the leaching agent to the roasted material according to the mass ratio of 1:5, then mix and put it into the autoclave, stir and react for 4 hours at a temperature of 140°C and a pressure of 0.7Mpa, and at the same time pass Oxygen, the amount of oxygen introduced is 0.25 times the mass of the material after roasting, the stirring speed is 400r / min, and the first leaching solution and the first leaching residue with a pH of 3 are obtained;

[0053] (3) lead recovery, the first leach slag is added carbonate according to 1.25 times of lead molar ratio, reacted at 85 ℃ for 3 hours, the second leach residue obtained by filtering is added nitric acid according to 1.4 times of lead molar ratio, at 50 React at...

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PUM

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Abstract

The invention relates to a smelting furnace soot treatment method, and belongs to the field of waste resourceful treatment. The smelting furnace soot treatment method comprises the steps of: (1) reductive roasting; (2) high-pressure oxygen leaching; (3) lead recovery; (4) copper recovery; and (5) zinc recovery. The smelting furnace soot treatment method, provided by the invention, can realize total recovery of lead, copper and zinc, so that obtained products are high in purity; meanwhile, the high-pressure oxygen leaching process is adopted to improve the recovery rate of lead, copper and zinc; a wet method is adopted to treat lead to prevent the pollution caused by lead steam; and the social benefit and the economic benefit are higher.

Description

technical field [0001] The invention relates to the field of waste resource treatment, in particular to a treatment method for smelting furnace soot. Background technique [0002] Smelting furnace soot is a secondary resource that has a large amount of emissions in some hydrometallurgical industries and has not been fully utilized so far. It has important theoretical and practical significance to recover valuable elements such as copper, zinc and lead from smelting furnace soot for comprehensive resource utilization. [0003] Although the domestic wet extraction of non-ferrous metals has made great progress in recent decades, the non-ferrous metals extracted by pyrometallurgical technology still account for a certain proportion. In the pyro-smelting system, volatile elements such as zinc and lead enter the dust collection system together with a small amount of copper to form smelting furnace soot. This part of the soot needs to be cleaned out every once in a while. General...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B13/00C22B15/00C22B19/30
CPCY02P10/20
Inventor 张弘
Owner 谭建新
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