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High-efficiency sulfur-fixing agent for cement rotary kiln and its application method

A cement rotary kiln and sulfur-fixing agent technology, applied in the field of environmental protection, can solve the problems of soil acidification, accelerated soil impoverishment, corrosion of building machinery and municipal facilities, etc.

Active Publication Date: 2020-10-23
广东万引科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] SO 2 It is a colorless irritating gas, which has a great irritating effect on the human respiratory tract, will increase the incidence of respiratory diseases, directly endanger human health, and will form acid mist or sulfate aerosol in the atmosphere and further Oxidized to form acid rain will fall to the ground, leading to soil acidification, accelerating soil barrenness, which is not conducive to the growth of vegetation, and at the same time leads to acidification of lakes, rivers and other water bodies, corroding buildings, machinery and municipal facilities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A high-efficiency sulfur-fixing agent for a rotary kiln, which is composed of the following components in mass percentage: 40% of fluorite tailings, 20% of strontium slag, and 40% of barium slag; the mass percentage of the active ingredients in the high-efficiency sulfur-fixing agent is: Calcium fluoride 4.2%, strontium oxide 6.6%, barium oxide 3.2%.

[0024] Mix the components evenly according to the mass percentage, and grind to a specific surface area of ​​500m 2 / kg to produce a high-efficiency sulfur-fixing agent. 0.03% high-efficiency sulfur-fixing agent is mixed with cement raw meal, and then calcined in a cement rotary kiln to prepare clinker. The sulfur-fixing efficiency of clinker is 95.6%.

Embodiment 2

[0026] A high-efficiency sulfur-fixing agent for a rotary kiln, which is composed of the following components in mass percentage: 50% of fluorite tailings, 20% of strontium slag, and 30% of barium slag; the mass percentage of the active ingredients in the high-efficiency sulfur-fixing agent is: Calcium fluoride 5%, strontium oxide 6.6%, barium oxide 2.8%.

[0027] Mix the components evenly according to the mass percentage, and grind to a specific surface area of ​​500m 2 / kg to produce a high-efficiency sulfur-fixing agent. Mix 0.06% high-efficiency sulfur-fixing agent with cement raw meal, and then prepare clinker by calcining in a cement rotary kiln. The sulfur-fixing efficiency of clinker is 97.1%.

Embodiment 3

[0029] A high-efficiency sulfur-fixing agent for a rotary kiln, which is composed of the following components in mass percentage: 60% of fluorite tailings, 20% of strontium slag, and 20% of barium slag; the mass percentage of the active ingredients in the high-efficiency sulfur-fixing agent is: Calcium fluoride 6.2%, strontium oxide 6.6%, barium oxide 2.2%.

[0030] Mix the components evenly according to the mass percentage, and grind to a specific surface area of ​​500m 2 / kg to produce a high-efficiency sulfur-fixing agent. Mix 0.09% high-efficiency sulfur-fixing agent with cement raw meal, and then prepare clinker by calcining in a cement rotary kiln. The sulfur-fixing efficiency of clinker is 98.9%.

[0031] The fluorite tailings selected by the present invention are composed of calcium fluoride, calcium oxide, silicon dioxide, magnesium oxide, aluminum oxide, etc.; the strontium slag is composed of strontium oxide, calcium oxide, silicon dioxide, aluminum oxide, etc.; B...

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Abstract

The invention belongs to the technical field of environmental protection, and discloses a high-efficiency sulfur fixing agent for a cement rotary kiln and a use method thereof. The high-efficiency sulfur fixing agent for the cement rotary kiln is composed of the following components by the mass percentage: 30-60% of fluorite tailings, 20-40% of strontium slag, and 10-40% of barium slag, wherein the sum of the contents of all the components is 100%. The use method comprises the steps: mixing the components evenly, grinding, mixing with a cement raw material or placing in a coal injection pipe,calcining to obtain a cement clinker, and thus realizing the sulfur fixing effect of the sulfur fixing agent. The sulfur fixing agent has high sulfur fixing efficiency, reduces the SO2 concentration in flue gas of the cement kiln, also reduces the clinker firing temperature, improves the clinker quality, and has great economic, social and environmental significance for energy saving and emission reduction, sustainable development and comprehensive utilization of resources in cement industry.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a high-efficiency sulfur-fixing agent for a cement rotary kiln and a use method thereof. Background technique [0002] SO 2 It is a colorless irritating gas, which has a great irritating effect on the human respiratory tract, will increase the incidence of respiratory diseases, directly endanger human health, and will form acid mist or sulfate aerosol in the atmosphere and further The acid rain formed by oxidation will fall to the ground, causing soil acidification, accelerating soil barrenness, which is not conducive to the growth of vegetation, and at the same time causing lakes, rivers and other water bodies to acidify, corroding buildings, machinery and municipal facilities. SO emissions from the cement industry in 2015 2 1.467 million tons, and it is increasing year by year, accounting for about 2 It accounts for 8.7% of the total emissions, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/42
CPCC04B7/421
Inventor 张同生吴畅田文立陈新智韦江雄余其俊
Owner 广东万引科技股份有限公司
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