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Preparation method of a nitrogen-fixing cement short kiln coal-saving agent

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: 2021-01-26
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 a nitrogen-fixing cement short kiln coal-saving agent

Examples

Experimental program
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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 for a nitrogen-fixing cement short kiln, which comprises grinding 30-50 parts of rare earth tailings, 10-20 parts of magnesium hydroxide, 15-25 parts of hydrated alumina, and mixed powder to obtain a mixture ; Add 5-15 parts of aromatic polycondensate, 5-15 parts of organosilicon polymer, and 2-10 parts of zinc borate into the mixture, and mix evenly to obtain a coal-saving agent for nitrogen-fixing cement short kilns. The present invention is aimed at the calcined cement process system of short-flame rapid burning. After the high combustion value coal used in the short-flame kiln type is added to the nitrogen-fixing cement short-kiln coal-saving agent mixed coal obtained by the present invention and burned, compared with the same amount of raw coal after burning, the burning NO in soot gas x Reduced by 50‑60%, comprehensively reducing the energy consumption of cement clinker firing by 5‑15%; it can also effectively reduce NO x The formation amount and emission value, thereby improving the nitrogen fixation effect of clinker.

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 Patents(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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