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Oxygen-enriched combustion method of volatilization klin

An oxygen-enriched combustion and inlet technology, applied in combustion methods, combustion equipment, fuel supply, etc., can solve the problems of incomplete volatilization of metals, high production costs, energy waste, etc., and achieve the effect of reducing fuel consumption and increasing volatilization rate

Inactive Publication Date: 2014-09-10
广西聚为能源科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method of oxygen-enriched combustion in a volatilization kiln, which can solve the problems of incomplete volatilization of valuable metals, waste of a large amount of energy, and high production costs during the production process of a volatilization kiln.

Method used

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  • Oxygen-enriched combustion method of volatilization klin
  • Oxygen-enriched combustion method of volatilization klin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] figure 1 The shown volatilization kiln oxygen-enriched combustion device includes a volatilization kiln 101, a nozzle 102 arranged in the inner cavity of the volatilization kiln, and a membrane separator 106; the inlet of the air filter 108 receives air, and its outlet communicates with the inlet of the high-pressure centrifugal fan 107, The outlet of the high-pressure centrifugal fan 107 is communicated with the inlet of the membrane separator 106, and an outlet of the membrane separator 106 is communicated with the dry Roots vacuum pump 105 through a pipeline, and the other outlet is used for exhaust gas; the dry roots vacuum pump 105 The outlet communicates with the inlet of the air storage tank 104 , the outlet of the air storage tank 104 communicates with the inlet of the air compressor 103 , and the outlet of the air compressor 103 communicates with the nozzle 102 .

[0021] The air filter 108 is equipped with two-stage high-efficiency filter cartridges. The first...

Embodiment 2

[0031] use figure 1 The shown volatilization kiln oxygen-enriched combustion device is used for production;

[0032] The oxygen-enriched combustion method of the zinc slag volatilization kiln includes three steps: batching, oxygen-enriched preparation, and air supply.

[0033] 1) Ingredients: ① Moisture requirement for mixture (leach slag, pulverized coal): 18%, initial leaching slag contains 20% water. ② Requirements for particle size of leach slag: 10-50 mm. ③Powdered coal is required to be anthracite, with 75% fixed carbon, 7% volatile matter and 25% ash. ④Powdered coal particle size composition: Less than 5mm accounts for less than 30%, 5-25mm accounts for more than 50%, and greater than 25mm accounts for less than 20%.

[0034] 2) Oxygen-enriched preparation is prepared by a membrane negative pressure oxygen device. In this embodiment, the power of the dry Roots vacuum pump 105 is 500 kilowatts, and the oxygen-enriched flow rate reaches 9000m 3 / h, the enriched oxygen...

Embodiment 3

[0038] figure 1 The shown volatilization kiln oxygen-enriched combustion device is used for production;

[0039] The oxygen-enriched combustion method of the zinc slag volatilization kiln includes three steps: batching, oxygen-enriched preparation, and air supply.

[0040] 1) Ingredients: ① Moisture requirement for mixture (leach slag, pulverized coal): 15%, initial leaching slag contains 25%. ② Requirements for particle size of leach slag: 10-50 mm. ③Powdered coal is required to be anthracite, with 70% fixed carbon, 5% volatile matter and 23% ash. ④Powdered coal particle size composition: Less than 5mm accounts for less than 30%, 5-25mm accounts for more than 50%, and greater than 25mm accounts for less than 20%.

[0041] 2) Oxygen-enriched preparation is prepared by membrane method negative pressure oxygen device. In this example, the power of dry Roots vacuum pump 105 is 300 kW, and the oxygen-enriched flow rate reaches 6000m 3 / h, the enriched oxygen concentration is 2...

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Abstract

The invention discloses an oxygen-enriched combustion method of a volatilization klin and relates to the technical filed of klin equipment. The oxygen-enriched combustion method is implemented through an oxygen-enriched combustion device of the volatilization klin, and comprises the following steps: (1) preparing materials, namely mixing leaching slag and pulverized coal to obtain a mixture, wherein the moisture content of the leaching slag is less than 20%, the moisture content of the pulverized coal is less than 5% and the moisture content of the mixture is 12-18%; (2) preparing oxygen, namely preparing oxygen with a membrane separator, wherein the flow rate of the enriched oxygen is 3000-9000m<3> / / h and the concentration of the enriched oxygen is 22-30%; (3) supplying air, namely an air compressor supplies 0.1-0.2MPa compressed oxygen-enriched air and the mixture is combusted with the oxygen-enriched air through a nozzle in the cavity of the volatilization klin. According to the oxygen-enriched combustion method, the problem that during production of the volatilization klin, the production cost is high because valuable metal is not volatilized completely and large amount of energy is wasted, is solved.

Description

technical field [0001] The invention relates to the technical field of kiln equipment, in particular to an oxygen-enriched combustion method of a volatilization kiln for nonferrous smelting. Background technique [0002] Energy shortages and climate anomalies have become the primary focus of governments at all levels and all walks of life in my country today. With the rapid growth of the global economy, the demand for energy is increasing, and energy has become a bottleneck restricting economic growth. The zinc smelting industry is one of the important basic material industries in my country. In 2012, the national electric zinc production has exceeded 4.83 million tons, and every 1 ton of electric zinc produced needs to produce 1-1.05 tons of initial leaching slag. Zinc and other valuable metals are contained in the leaching slag obtained by the conventional leaching process in my country's hydrometallurgy zinc smelting enterprises. Generally, zinc, lead, indium and other va...

Claims

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Application Information

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IPC IPC(8): F23C7/00F23K1/00F23L7/00
CPCY02E20/34
Inventor 王春文李文斌翟晓平
Owner 广西聚为能源科技有限公司
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