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Preparation method of calcium carbide formed coke

A technology of calcium carbide and coke powder is applied in the field of preparation of calcium carbide type coke to achieve the effects of large output, poor cohesion and simplified process

Active Publication Date: 2010-07-14
XINJIANG YUEHETAI CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is currently no method for preparing coke from solid products of plasma coal cracking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1, a kind of preparation method of calcium carbide type coke, take plasma coal cracking solid product as raw material, carry out following steps successively:

[0053] 1), pretreatment:

[0054] The solid product of plasma coal cracking is first deashed and refined, and then devolatilized and carbonized; the details are as follows:

[0055] ①, deashing:

[0056] A. Add 5 times the mass of caustic soda solution (NaOH solution) with a concentration of 10wt% to the solid product of plasma coal cracking, stir it mechanically to make it evenly mixed, then heat up to 200-210° C. for 2 hours; end the reaction.

[0057] B, the reaction product obtained in step A is filtered, and the filter cake is washed with water until the pH is 7 to 7.5; then adding a concentration of 10wt% hydrochloric acid solution to the filter cake washed with water, the quality of the hydrochloric acid solution is the plasma coal cracking solid 5 times of the product, after uniform stirring...

Embodiment 2

[0073] Embodiment 2, a kind of preparation method of calcium carbide type coke, take plasma coal cracking solid product as raw material, carry out following steps successively:

[0074] 1), pretreatment:

[0075] In step 1) of embodiment 1, alkali is changed into potassium hydroxide, acid is changed into nitric acid, and all the other steps are the same.

[0076] 2), ingredients:

[0077] Using powdered calcium hydroxide as a binder, mix coke powder and powdered calcium hydroxide evenly to obtain a mixture. Calcium hydroxide accounts for 20% of the total weight of the mixture, that is, the ash ratio is 20%; then mix the mixture with water Mix to obtain the material, 23% of the total weight of water and material, that is, the molding water is 23wt%.

[0078] 3), molding:

[0079] The material was press-molded at room temperature, the molding pressure was 3t, and a cylindrical green ball of 1.1cm×Φ1.8cm was obtained, with a mass of about 3.7g.

[0080] 4), green ball solidif...

Embodiment 3

[0083] Embodiment 3, a kind of preparation method of calcium carbide type coke, use plasma coal cracking solid product as raw material, carry out following steps successively:

[0084] 1), pretreatment:

[0085] With the step 1) of embodiment 1.

[0086] 2), ingredients:

[0087] Using powdered calcium hydroxide as a binder, mix coke powder and powdered calcium hydroxide evenly to obtain a mixture. Calcium hydroxide accounts for 18% of the total weight of the mixture, that is, the ash ratio is 18%. Then mix the mixture with water Mix to obtain the material, 20% of the total weight of water and material, that is, the molding water is 20wt%.

[0088] 3), molding:

[0089] The material was press-molded at room temperature, the molding pressure was 0.6t, and a cylindrical green ball of 1.1cm×Φ1.8cm was obtained, with a mass of about 3.7g.

[0090] 4), green ball solidification (carbonation):

[0091] The raw pellets are piled into the carbonation tank (curing tank), the tank ...

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Abstract

The invention discloses a preparation method of calcium carbide formed coke, which takes a plasma coal cracking solid product as a raw material and comprises the following steps of: (1) preprocessing: firstly, deashing the plasma coal cracking solid product and then carrying out devolatilization and carbonization to obtain coke powder with the ash content of no more than 9% and the volatile constituent of no more than 2%; (2) proportioning: taking powdery calcium hydroxide as an adhesive and mixing the coke powder and the powdery calcium hydroxide evenly to obtain a mixture; then, mixing the mixture and water to obtain a material; (3) forming: pressing and forming the material at room temperature to obtain a green-ball; and (4) solidifying the green-ball: stacking the green-ball into a solidification tank, introducing CO2 and solidifying; taking out of the tank and drying or airing to obtain the formed coke. The formed coke prepared by adopting the method can be used as a special carbon material for producing calcium carbide.

Description

technical field [0001] The invention relates to a method for preparing calcium carbide coke by plasma cracking solid products of coal powder. Background technique [0002] In the process of plasma cracking coal to acetylene, coal and plasma react in the cracking reactor, and the cracked gas is quenched, dedusted and multi-phase separated to obtain three parts: gas phase, liquid phase and solid phase. The solid phase is called solid product (that is, the solid product of plasma coal cracking), and the yield accounts for more than 50% of the input coal powder. [0003] The solid phase product has small particle size (average particle size is less than 50 μm, 90% is less than 125 μm), large specific surface area, and contains inorganic substances such as quartz stone, dolomite, and calcite. The composition characteristics and elements of a certain batch of Xinjiang coal plasma cracking solid products The composition is shown in Tables 1 and 2. [0004] Table 1. Characteristic...

Claims

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Application Information

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IPC IPC(8): C01B31/02C10B53/08C10B47/06C10B49/02
Inventor 钱超张旭陈新志荣冈何潮洪任其龙陈丰秋吴忠标
Owner XINJIANG YUEHETAI CHEM TECH CO LTD
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