Preparation method of coal-saving agent used for nitrogen fixation type cement short kiln

A technology of coal-saving agent and cement, which is applied in the fields of coal-burning additives, energy-saving and emission-reduction. Heat transfer mode, effect of reducing kiln tail load

Active Publication Date: 2019-04-16
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The raw materials of the above-mentioned coal-saving agents are complicated and the cost is high. There is no coal-saving agent specially designed and developed for short kilns, and there is no nitrogen fixation effect from the mechanism of action.

Method used

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  • Preparation method of coal-saving agent used for nitrogen fixation type cement short kiln
  • Preparation method of coal-saving agent used for nitrogen fixation type cement short kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1) The parts by weight are 36 parts of lanthanum vanadium allanite, 17 parts of magnesium hydroxide, 25 parts of monohydrate alumina, and mixed grinding to obtain a specific surface area ≥ 400m 2 / kg of mixture;

[0033] 2) Add 10 parts of polyphenylene sulfide, 8 parts of silicone oil, and 7 parts of zinc borate into the mixture obtained in step 1), and mix evenly to obtain a nitrogen-fixing cement short-kiln coal-saving agent.

Embodiment 2

[0035] 1) Mix and grind 30 parts by weight of leached ore, 10 parts of magnesium hydroxide, 20 parts of alumina trihydrate, and obtain a specific surface area of ​​≥ 400m 2 / kg of mixture;

[0036] 2) Add 14 parts of the mixture of polyphenylene sulfide and aromatic polyimide, 14 parts of silicone oil, and 6 parts of zinc borate to the mixture obtained in step 1), and mix evenly to obtain a nitrogen-fixing cement short kiln coal-saving agent .

[0037] The mass ratio of the polyphenylene sulfide to the aromatic polyimide is 1:1.

Embodiment 3

[0039] 1) Mix and grind 38 parts by weight of monazite, 19 parts of magnesium hydroxide, and 16 parts of monohydrated alumina to obtain a specific surface area of ​​≥ 400m 2 / kg of mixture;

[0040] 2) Add 8 parts of polyphenylene sulfide, 15 parts of a mixture of silicone oil and silicone resin, and 4 parts of zinc borate into the mixture obtained in step 1), and mix evenly to obtain a nitrogen-fixing cement short-kiln coal-saving agent.

[0041]The mass ratio of the silicone oil to the silicone resin is 2:1.

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Abstract

The invention discloses a preparation method of a coal-saving agent used for a nitrogen fixation type cement short kiln. 30-50 parts of rare earth tailings, 10-20 parts of magnesium hydroxide, 15-25 parts of hydrated aluminum oxide are mixed and ground to obtain a mixture; 5-15 parts of aromatic condensates, 5-15 parts of organosilicon polymers and 2-10 parts of zinc borate are added into the mixture, uniform mixing is conducted, and the coal-saving agent used for the nitrogen fixation type cement short kiln is obtained. According to the process system of calcining cement with short flame andrapid burning, high-burning-value coal used in a short-flame kiln is added into the coal-saving mixture coal used in the nitrogen-fixing cement kiln for mixed combustion, compared with combustion of the same amount of raw coal, the NO(x) in coal-burning flue gas is reduced by 50-60%, and the energy consumption of combustion of cement clinker is comprehensively reduced by 5-15%, the formation amount and discharge amount of NO(x) can also be effectively reduced, and the nitrogen fixing effect of the clinker can thus be improved.

Description

technical field [0001] The invention belongs to the technical fields of coal-burning additives and energy-saving and emission-reduction, and in particular relates to a preparation method of a nitrogen-fixing cement short-kiln coal-saving agent. Background technique [0002] my country is a large coal-producing country, but also a large coal-consuming country. Coal is one of the main energy sources and chemical raw materials in our country, and it is also the most common energy material. Since the founding of the People's Republic of China, my country's coal consumption has continued to grow. It is estimated that by 2050, the proportion of coal in primary energy consumption will still be more than 50%. Therefore, coal will still be in a dominant position in my country's energy consumption field for a long period of time in the future. , the price of coal will also increase. The smoke exhaust requirements of coal combustion, the utilization rate, and the reduction of environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10
CPCC10L9/10
Inventor 王迎斌姚恒吴其林柯凯
Owner HUBEI UNIV OF TECH
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