Coal slime curing and upgrading agent

A curing agent and coal slime technology, applied in solid fuel, fuel additive, petroleum industry, etc., can solve problems such as increasing safety risks, restricting properties, increasing nitrogen oxide emissions, etc.

A curing agent and coal slime technology, applied in solid fuel, fuel additive, petroleum industry, etc., can solve problems such as increasing safety risks, restricting properties, increasing nitrogen oxide emissions, etc.

CN112646630AInactive Publication Date: 2021-04-13ๅˆ˜ๆ˜Ž้”
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  • Coal slime curing and upgrading agent
  • Coal slime curing and upgrading agent
  • Coal slime curing and upgrading agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: The present invention provides a technical solution: anthracite coal slime (containing 21% water)

[0020] A coal slime solidification and upgrading agent, in terms of weight ratio, the mixed coal slime is composed of 4% coal slime solidification and upgrading agent and 96% anthracite coal slime, wherein the coal slime solidification and upgrading agent is composed of anhydrous Magnesium chloride is 42%, heavy magnesium oxide is 20.5%, polyacrylate is 11%, magnesium sulfate is 33%, and quicklime is 8.5%.

[0021]

Embodiment 2

[0022] Embodiment 2: The present invention provides a technical solution: anthracite coal slime (containing 21.4% water)

[0023] A coal slime solidification and upgrading agent, in terms of weight ratio, the mixed coal slime is composed of 3% coal slime solidification and upgrading agent and 97% anthracite coal slime, wherein the coal slime solidification and upgrading agent is composed of anhydrous Magnesium chloride is 42%, heavy magnesium oxide is 20.5%, polyacrylate is 11%, magnesium sulfate is 33%, and quicklime is 8.5%.

[0024]

Embodiment 3

[0025] Embodiment 3: The present invention provides a technical solution: bituminous coal slime (containing 35.3% water)

[0026]A coal slime solidification and upgrading agent, in terms of weight ratio, the mixed coal slime is composed of 6% coal slime solidification and upgrading agent and 94% bituminous coal slime, wherein the coal slime solidification and upgrading agent is composed of anhydrous Magnesium chloride is 42%, heavy magnesium oxide is 20.5%, polyacrylate is 11%, magnesium sulfate is 33%, and quicklime is 8.5%.

[0027]

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Abstract

The invention relates to the technical field of coal washing and coal slime treatment, in particular to a coal slime curing and upgrading agent which comprises a hardening agent, a curing agent, a polymer cross-linking agent, a water absorbent and a sulfur-fixing agent, and the hardening agent is one or a mixture of more of anhydrous magnesium chloride, magnesium oxychloride cement and Sorel cement for coal slime. The curing agent is a mixture of one or more of halogen powder (MgO) or heavy magnesium oxide halogen powder for the coal slime, and the polymer cross-linking agent is a mixture of one or more of polyacrylate, starch acrylate polymer and starch- acrylonitrile graft copolymer for the coal slime. In the invention, the strength of the coal slime is naturally improved without drying, and the coal slime is naturally dehydrated; and compared with drying of common coal slime, the field space is greatly saved, and the storage pressure is greatly relieved. In addition, the sulfur-fixing agent is added into the curing upgrading agent, so that the problem of high emission caused by high sulfur content in the coal slime is greatly improved.

Description

technical field [0001] The invention relates to the technical field of coal washing and coal slime treatment, in particular to a coal slime solidification and upgrading agent. Background technique [0002] Coal slime is a by-product of the coal preparation plant, with a particle size of less than 0.5mm, a moisture content of more than 30%, and an ash content of about 30-40%. It is in the shape of a sticky mud cake. Due to its high moisture content, high ash content, high sulfur content, and low calorific value (calorific value 2000-4000 kcal), the economic value is low, and the strong mobility makes it difficult to load, unload and transport, and the storage occupies a large area. At the same time, dust and water pollution It is more serious, and there is a lack of furnace types that can apply coal slime, which is difficult for users to use and the comprehensive value is low. [0003] In 2019, my country's raw coal output was 3.85 billion tons, and the washing rate was 73%....

Claims

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Application Information

Patent Timeline
13 Apr 2021
Publication
CN112646630A
IPC
C10L9/10; C10L10/00
CPC
C10L9/10; C10L10/00; C10L2290/08
Inventors
ๅˆ˜ๆ˜Ž้”