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Low-ash fusion point anthracitic water-coal slurry for coal gasification and preparation method thereof

A technology of anthracite and coal-water slurry, which is applied in the direction of liquid carbon-containing fuel, petroleum industry, fuel, etc., can solve the problems of increasing production costs and increasing slag, and achieve the effects of reducing ash melting point, reducing erosion, and avoiding carbon dioxide emissions.

Active Publication Date: 2015-06-03
GUIZHOU JINCHI CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large amount of limestone added, the increase of carbon dioxide in the synthesis gas and the erosion of the slag on the refractory material are increased, thereby increasing the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: 50 parts of anthracite clean coal, 3 parts of sulfuric acid slag, 0.3 part of sodium carbonate, 10 parts of coal slime, 37 parts of water, and 1.8 parts of lignosulfonate are added in proportion, and then added to a ball mill and ground to Anthracite coal-water slurry for coal gasification with an ash melting point lower than 1330° C. is prepared if the thickness is less than 0.074 mm, and the coal slime is the coal slime produced during the anthracite washing process.

Embodiment 2

[0013] Example 2, 46 parts of anthracite clean coal, 2 parts of sulfuric acid slag, 0.1 part of potassium carbonate, 13 parts of coal slime, 39 parts of water, and 1.5 parts of naphthalene-based coal-water slurry admixture are proportioned, and then added to a ball mill for grinding Anthracite coal-water slurry for coal gasification with an ash melting point lower than 1300° C. can be prepared when the fineness is less than 0.074 mm. The coal slime is the coal slime that will be produced during the anthracite washing process.

Embodiment 3

[0014] Embodiment 3, 53 parts of anthracite clean coal, 6 parts of dust collection powder of ironmaking blast furnace, 0.3 part of sodium hydroxide, 7 parts of coal slime, 34 parts of water, and 1.1 parts of naphthalene-based coal-water slurry admixture are proportioned in proportion, Then add it into a ball mill and grind it to below 0.074mm to prepare anthracite coal-water slurry for coal gasification with an ash melting point lower than 1320°C. The coal slime is the coal slime produced during the anthracite washing process.

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PUM

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Abstract

The invention relates to low-ash fusion point anthracitic water-coal slurry for coal gasification and a preparation method thereof. The low-ash fusion point anthracitic water-coal slurry comprises the following raw materials in parts by mass: 45-55 parts of anthracitic clean coal, 2-8 parts of iron-based substance, 0.1-0.5 part of alkali, 5-15 parts of coal slime, 32-40 parts of water and 1-2 parts of water-coal slurry additive. The low-ash fusion point anthracitic water-coal slurry has the advantages that the anthracitic clean coal is used as the raw material, and the ash fusion point of the anthracitic water-coal slurry for coal gasification is lowered by adding the iron-based substance and few alkali and coal slime, so that the resource utilization of the coal slime can be realized and the emission problem of carbon dioxide caused by the addition of limestone is avoided; and simultaneously, the erosion on a refractory material of a coal gasifier, which is caused by the increasing of alkalinity of gasified slag due to addition of lots of limestone, can be reduced to a certain degree, thus the purposes of energy saving and consumption reduction are achieved.

Description

technical field [0001] The invention relates to an anthracite coal-water slurry for coal gasification with a low ash melting point and a preparation method thereof, belonging to the technical field of coal-water slurry preparation. Background technique [0002] When preparing anthracite coal-water slurry, the anthracite is generally washed and then cleaned coal is used for the preparation of anthracite coal-water slurry. The ash melting point of the anthracite-clean coal-water slurry can generally be as high as 1500°C. During the washing process of anthracite, a large amount of coal slime will be produced, and this part of coal slime generally contains more than 40% carbon. [0003] The current method of reducing the ash melting point of anthracite coal-water slurry is generally by adding more than 20% limestone as a co-solvent to reduce the ash melting point of the prepared anthracite coal-water slurry to below 1350 °C required by the coal-water slurry gasifier. Due to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/32
Inventor 陈前林王景行万国君罗焕虎敖先权刘锦启胡云凯李勇
Owner GUIZHOU JINCHI CHEM CO LTD