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Oxygen-rich side-blown smelting reduction furnace and lead-rich material lead smelting method

A reduction furnace and oxygen-enriched technology, applied in the field of oxygen-enriched side-blown melting reduction furnaces and lead-enriched material lead smelting, can solve the problems of high labor intensity of workers, insufficient coal combustion, low energy efficiency, etc. Improve economic efficiency and accelerate the effect of reduction and oxidation

Inactive Publication Date: 2013-04-03
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, the reduction furnace is generally composed of a fire chamber and a furnace. By manually adding anthracite lump coal, there are problems such as insufficient coal combustion, low energy efficiency, high labor intensity and even potential safety hazards.
The metal reduction and heat utilization of this smelting reduction furnace has not yet achieved the best results. It is necessary to improve the technology to maximize the heat release of coal combustion, provide a more stable temperature to improve the working efficiency of the smelting reduction furnace, and promote Recycling of waste lead-acid batteries

Method used

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  • Oxygen-rich side-blown smelting reduction furnace and lead-rich material lead smelting method
  • Oxygen-rich side-blown smelting reduction furnace and lead-rich material lead smelting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Sample loading: 10t of waste lead-acid battery materials after preliminary treatment are sent into the furnace 9 through the feeding port 6;

[0027] (2) Oxygen-enriched reduction smelting: send oxygen-enriched air with an O2 concentration of 25% into the primary tuyere, the pressure of the primary tuyere is 0.08MPa, and the wind speed is 150m / s, and the pulverized bituminous coal is injected through the coal injection port to adjust the excess oxygen The coefficient α value is 0.3, so that pulverized bituminous coal can be fully burned in the furnace, and the waste lead-acid battery material is heated and kept at a temperature of 1200-1250°C; the reduction reaction is 5 hours, and 7.5t of crude lead is produced;

[0028] (3) Product treatment: crude lead is exported from the first outlet, and then transported to the blast furnace for secondary smelting, while the smoke enters the unified flue gas bag dust removal pipeline system through the flue gas channel for bag ...

Embodiment 2

[0030] (1) Sample loading: 10t of waste lead-acid battery materials after preliminary treatment are sent into the furnace 9 through the feeding port 6;

[0031] (2) Oxygen-enriched reduction smelting: Send oxygen-enriched air with an O2 concentration of 50% into the primary tuyere, the pressure of the primary tuyere is 0.16MPa, and the wind speed is 250m / s, and the pulverized bituminous coal is injected through the coal injection port to adjust the excess oxygen The coefficient α value is 1.0, so that pulverized bituminous coal is fully burned in the furnace, and the waste lead-acid battery material is heated and kept at a temperature of 1200-1250 °C; the reduction reaction takes 5 hours to generate 8 tons of crude lead;

[0032] (3) Product treatment: crude lead is exported from the first outlet, and then transported to the blast furnace for secondary smelting, while the smoke enters the unified flue gas bag dust removal pipeline system through the flue gas channel for bag dus...

Embodiment 3

[0034] (1) Sample loading: 10t of waste lead-acid battery materials after preliminary treatment are sent into the furnace 9 through the feeding port 6;

[0035] (2) Oxygen-enriched reduction smelting: send oxygen-enriched air with an O2 concentration of 40% into the primary tuyere, the pressure of the primary tuyere is 0.12MPa, and the wind speed is 200m / s, and the pulverized bituminous coal is injected through the coal injection port to adjust the excess oxygen The coefficient α value is 0.7, so that pulverized bituminous coal can be fully burned in the furnace, and the waste lead-acid battery material is heated and kept at a temperature of 1200-1250 °C; the reduction reaction is 5 hours, and 7.7t of crude lead is produced;

[0036] (3) Product treatment: crude lead is exported from the first outlet, and then transported to the blast furnace for secondary smelting, while the smoke enters the unified flue gas bag dust removal pipeline system through the flue gas channel for bag...

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Abstract

The invention discloses an oxygen-rich side-blown smelting reduction furnace. The furnace adopts the structure that a plurality of outlets are formed at the lower part of the furnace; a feed port and a flue gas channel are formed at the top of the furnace; and a primary air outlet is formed in the middle of the furnace. The furnace is characterized in that a pulverized coal injection port is also arranged in the middle of the furnace. The invention further discloses a lead-rich material lead smelting method based on the reduction furnace, and the method mainly comprises the following steps: loading a sample, carrying out oxygen-rich reduction smelting, and processing a product. In the lead smelting method provided by the invention, the combustion efficiency of coal is high, low-cost smoke lump coal can be used as fuel, energy saving and environmental protection can be achieved, and the economic benefit can be improved. According to the invention, the smelting time can be shortened, while the reduction of the lead is more sufficient, and the lead content in the slag is also reduced compared to that before the oxygen-rich process is carried out.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal smelting, and in particular relates to an oxygen-enriched side-blowing smelting reduction furnace and a method for smelting lead from lead-rich materials. Background technique [0002] Oxygen enrichment is the application of physical or chemical methods to collect oxygen in the air, so that the oxygen enrichment content in the collected gas is ≥ 21%. Existing methods of oxygen enrichment mainly include pressurized oxygen, oxygen-generating machine-made oxygen, and chemical oxygen-generating. [0003] To put it simply, oxygen-enriched combustion refers to the combustion of oxygen-enriched air with a higher oxygen concentration than ordinary air (21% oxygen). It is a highly efficient and energy-saving combustion technology. Both have applications. Advantages and Combustion with ordinary air has the following advantages: 1. High flame temperature and blackness; Flue gas volume after comb...

Claims

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Application Information

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IPC IPC(8): F27B17/00C22B13/02
Inventor 舒月红高倩陈红雨
Owner SOUTH CHINA NORMAL UNIVERSITY
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