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Safe and high-efficiency recovery method for converter gas

A converter gas and recovery method technology, applied in the direction of manufacturing converters, etc., can solve the problems of excessive oxygen content of gas, affecting the calorific value of gas, low carbon monoxide content, etc. Effect

Active Publication Date: 2010-08-25
武汉市赟巨科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] But in fact, when the converter gas is recovered, the oxygen content in the gas in front of the cabinet often exceeds the standard and / or the carbon monoxide content is too low, and even accidents occur, causing undue losses; and a large amount of CO 2 The existence also affects the improvement of the unit calorific value of gas, polluting the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The converter used for smelting is a 100t converter, the carbon material used is anthracite coal powder, and the anthracite powder is crushed to a particle size below 300 mesh (particle size 0.048mm), and the water weight content in the carbon material is less than 1%.

[0018] When the converter gas is recovered, the pulverized carbon material is injected into the gasification cooling flue, and the injected carrier gas is nitrogen, and the flow rate of nitrogen is 0.1m 3 / 1kg carbon material, carbon material injection volume is 0.001kg / m 3 converter gas.

[0019] The carbon material is blown into the gasification cooling flue through the spray gun. The carbon material is blown into the gasification cooling flue through the spray gun. The spray gun is set on the gasification cooling flue. 2 / 3 of the length.

[0020] Carry out 10 tests according to the above method, and the average gas volume recovered is 92m 3 / ton of steel, the main component of recovered gas is CO...

Embodiment 2

[0024] The converter used in the smelting is an 80t converter, the carbon material used is anthracite coal powder with a particle size below 300 mesh, and the moisture content in the carbon material is less than 1%.

[0025] When the converter gas is recovered, the carbon material is injected into the gasification cooling flue, and the injection carrier gas is nitrogen, and the flow rate of nitrogen is 0.15m 3 / 1kg carbon material, carbon material injection volume is 0.002kg / m 3 converter gas.

[0026] The carbon material is blown into the gasification cooling flue through the spray gun, and the spray gun is arranged on the gasification cooling flue, and the distance between the spray gun and the converter mouth is 1 / 2 of the length of the gasification cooling flue.

[0027] Carry out 10 tests according to the above method, and the average gas volume recovered is 88m 3 / ton of steel, the main component of the recovered gas is CO 64-81% by volume, CO 2 8~14%, O 2 0.2-0.3...

Embodiment 3

[0031] The converter used in the smelting is a 60t converter, the carbon material used is coke powder with a particle size below 300 mesh, and the moisture content in the carbon material is less than 1%.

[0032] When the converter gas is recovered, the carbon material is injected into the gasification cooling flue, and the injection carrier gas is nitrogen, and the flow rate of nitrogen is 0.2m 3 / 1kg carbon material, carbon material injection volume is 0.003kg / m 3 converter gas.

[0033] The carbon material is blown into the gasification cooling flue through the spray gun, and the spray gun is arranged on the gasification cooling flue, and the distance between the spray gun and the converter mouth is 1 / 3 of the length of the gasification cooling flue.

[0034] Carry out 10 tests according to the above method, and the average gas volume recovered is 81m 3 / ton of steel, the main component of recovered gas is CO 66-78% by volume percentage, CO 2 11~17%, O 2 0.2-0.3%.

...

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Abstract

The invention relates to a safe and high-efficiency recovery method for converter gas. The converter gas generated in the smelting process of a converter is subjected to temperature reduction and dust extraction and enters a gas storage cabinet, wherein when the converter gas is recovered, a carbon material is blown into a vaporization cooling flue through a spray gun or is blown between the converter and the vaporization cooling flue; blown carrier gas is nitrogen, the flow rate of the nitrogen is 0.1 to 0.25 m<3> / kg of carbon material, and the blowing amount of the carbon material is 0.04 to 0.08 kg / m<3> of the converter gas; and the carbon material is pulverized anthracite or coke powder of which the granularity is below 300 meshes. The method has the advantages of improving the yield and quality of the recovered converter gas obviously, increasing the recovery volume of the gas per ton by 10 to 17 percent, improving the unit heat value by 14 and 20 percent and reducing oxygen content by 40 to 80 percent, along with strong practicability, safety, reliability, stable control and broad market prospects.

Description

technical field [0001] The invention relates to a processing method for converter gas, in particular to a safe and efficient recovery method for converter gas. Background technique [0002] During converter steelmaking and blowing, a ton of molten steel produced by a converter usually produces >70m 3 Converter gas; during the process of converter steelmaking, carbon in molten iron reacts with oxygen to form carbon monoxide, and a small amount of carbon is directly oxidized into carbon dioxide; carbon and oxygen formed after the reaction contain CO, CO 2 , N 2 The mixed gas is called converter gas. The main components of the gas of the oxygen top-blown converter are generally (volume fraction): CO is 45-65%, H 2 <2%, CO 2 15-25%, O 2 0.4~0.8%, N 2 It is 24-38%; the calorific value of converter gas is 6500-8400KJ / m3. Since the amount of converter gas generated is not balanced, the composition also changes. Usually, the gas recovered from multiple smelting process...

Claims

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Application Information

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IPC IPC(8): C21C5/38
Inventor 周建安戚德禄李旭周建平
Owner 武汉市赟巨科技有限公司
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