Method for producing semicoke by using pulverized coal

A technology for pulverized coal and semi-coke, applied in the field of semi-coke (blue carbon) production, can solve the problems of wear and tear of conveying equipment, difficult separation of tar, large amount of gas dust, etc. Effect

Active Publication Date: 2013-02-27
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of this technology are: 1) The conveying equipment is seriously worn; 2) T

Method used

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  • Method for producing semicoke by using pulverized coal
  • Method for producing semicoke by using pulverized coal
  • Method for producing semicoke by using pulverized coal

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0019] Example 1

[0020] A semi-coke produced from pulverized coal, and its raw material components are proportioned by mass percentage:

[0021] The raw material is pulverized coal 92%, and coal tar medium temperature pitch is 8%.

[0022] Production method: The raw material coal powder and coal tar medium temperature pitch are mixed in proportion, and then sent to a horizontal mixer, and 0.4MPa saturated steam is passed into the mixer and spacer for kneading and mixing, mixing uniformly and certain plastic materials It is discharged from the agitator and pressed into an oval briquettes with a diameter of 35 mm by a pair-roll forming machine, and is charged into a kettle-type carbonization furnace for carbonization and carbonization at a carbonization temperature of 720°C to obtain semi-coke.

[0023] The quality indicators of the semi-coke obtained in Example 1 are as follows:

[0024] Ash content (A d ) 6.91%, volatile matter (V daf ) 4.20%, sulfur (S t,,d ) 0.26%, specific resi...

Example Embodiment

[0025] Example 2

[0026] A semi-coke produced from pulverized coal, and its raw material components are proportioned by mass percentage:

[0027] Raw coal powder is 86%, caking coal is 8%, and coal tar medium temperature pitch is 6%.

[0028] The production method is the same as in Example 1.

[0029] The quality indicators of the semi-coke obtained in Example 2 are as follows:

[0030] Ash content (A d ) 8.31%, volatile matter (V daf )3.97%, sulfur (S t,,d ) 0.46%, specific resistance> 108464 10 -6 Ω·m; high reactivity, the reactivity of semi-coke to CO2 see figure 2 . Falling strength: A single ball falls freely at 1.83 meters for 10 times without breaking.

Example Embodiment

[0031] Example 3

[0032] A semi-coke produced from pulverized coal, and its raw material components are proportioned by mass percentage:

[0033] Raw coal powder is 90%, caking coal is 2%, and binder is 8%.

[0034] The production method is the same as in Example 1.

[0035] The quality indicators of the semi-coke obtained in Example 3 are as follows:

[0036] Ash content (A d ) 7.89%, volatile matter (V daf ) 4.56%, sulfur (S t,,d ) 0.36%, specific resistance> 108312 10 -6 Ω·m; high reactivity, the reactivity of semi-coke to CO2 see image 3 . Falling strength: A single ball falls freely at 1.83 meters for 10 times without breaking.

[0037] In the above embodiments, the raw coal powder is one or more of long flame coal, non-stick coal or weakly stick coal. The caking coal is 1 / 3 coking coal or fat coal, and the ash content is not more than 12% and the sulfur content is less than 1%. The softening point of medium temperature coal tar pitch (ring and ball method) is 75℃~90℃.

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Abstract

The invention relates to the field of semicoke production, in particular to a method for producing the semicoke by using pulverized coal. The method is characterized in that raw material constituents are mixed in proportion and sent to a blender with a spacer bush, and saturated steam or superheated steam at a temperature of no more than 200 DEG C and at a pressure ranging from 0.4MPa to 0.7MPa is fed into the spacer bush and the blender respectively, so that binders are melted and immersed and contacted with coal particles fully; and the mixture is pressed by a roll-type forming machine into molded coal with diameters ranging from 20mm to 50mm, and the molded coal is filled in a vertical coking furnace to be subjected to carbonization to produce the semicoke. Compared with the prior art, the method has the advantages that pulverized coal of long flame coal and the like serves as main materials to replace lump coal and serves as materials for special coke for industrials of iron alloys, calcium carbide and the like, so that the enterprise production cost is reduced, resources are used reasonably, and the environment is protected; and the production process is relatively simple, the investment is few, an existed vertical furnace device is not needed to be changed, and only crushing, mixing, molding equipment is needed to be added.

Description

technical field [0001] The invention relates to the field of semi-coke (blue coke) production, in particular to a method for producing semi-coke with pulverized coal. Background technique [0002] my country's Shenfu, Xinjiang and other places are areas that contain a large amount of mineral resources such as non-sticky, weakly sticky and long-flame coals, especially the Shenfu area, one of the eight largest coal fields in the world, has built a lot of 600,000 tons / year to 240 tons 10,000 tons / year semi-coke plant. These semi-coke plants use large-scale vertical furnace production technology to produce semi-coke, and the raw materials for the furnace are all non-sticky, weakly sticky or long-flame coal lumps with a size of 20mm to 80mm. The semi-coal factory screens the purchased lump coal, and takes 20mm-80mm lump coal as the raw material for the vertical furnace production, and the pulverized coal that accounts for about 15%-20% of the coal under the screen can only be sol...

Claims

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Application Information

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IPC IPC(8): C10B53/04
Inventor 刘淑萍方会斌郑广超陈亮
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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