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Method for molding raw material for production of calcium carbide

A molding method and raw material technology, which is applied in the petroleum industry, special forms of dry distillation, carbide, etc., can solve the problems of waste of resources, backlog of powdered semi-coke, difficulty in using powdered semi-coke, etc., and achieve the goal of protecting the environment and saving resources Effect

Inactive Publication Date: 2017-09-22
SHENWU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the content of powdered semi-coke in the low-temperature pyrolysis product of coal low-temperature pyrolysis accounts for about 15% by weight. Due to the difficulty in utilizing powdered semi-coke, a large backlog of powdered semi-coke is caused, which not only pollutes the environment, but also wastes resources.

Method used

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  • Method for molding raw material for production of calcium carbide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Crush Gangyuan semi-coke, quicklime, and Outer Mongolia coal to less than 1mm, among which the semi-coke is crushed to a size less than 100 mesh and more than 55%. , all raw materials were dried at 105°C (moisture content less than 5%). Weigh 1600g of Gangyuan semi-coke, 2800g of quicklime, 320g of Outer Mongolian coal, 50g of polyacrylamide, and 150g of high-temperature asphalt, put them into a mixer and mix them evenly, press them into balls with a briquetting machine, and heat them at 900°C for 0.5h. Solution, measure its cold strength, hot strength and drop strength, see Table 1.

[0052] Table 1 Molding raw material strength

[0053] project

Embodiment 2

[0055] Crush Gangyuan semi-coke, quicklime, and six-mine coal to less than 1mm, among which the semi-coke is crushed to a particle size of less than 100 mesh and greater than 55%; starch and humic acid are crushed to a size below 100 mesh (particles smaller than 100 mesh are greater than 70%), All raw materials were dried at 105°C (moisture content less than 5%). Weigh 1600g of Gangyuan semi-coke, 2800g of quicklime, 320g of Outer Mongolian coal, 50g of starch, and 150g of humic acid, put them into a mixer and mix them evenly, press them into balls with a briquetting machine, and heat them at 900°C for 0.5h for pyrolysis , measure its cold strength, hot strength and drop strength, see Table 2.

[0056] Table 2 Molding raw material strength

[0057] project

Embodiment 3

[0059] Crush Gangyuan semi-coke, quicklime, and coking coal to less than 1mm, among which semi-coke is crushed to a size less than 100 mesh and more than 55%; polyacrylamide, starch and high-temperature asphalt are crushed to less than 100 mesh (more than 70% of particles smaller than 100 mesh) , all raw materials were dried at 105°C (moisture content less than 5%). Weigh 1600g of Gangyuan semi-coke, 2800g of quicklime, 320g of Outer Mongolia coal, 30g of polyacrylamide, 30g of starch, and 150g of high-temperature asphalt, put them into a mixer and mix them evenly, press them into balls with a briquetting machine, and keep warm at 900°C for 0.5 h to carry out pyrolysis, measure its cold strength, hot strength and drop strength, see Table 3.

[0060] Table 3 Molding raw material strength

[0061] project

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Abstract

The invention discloses a method for molding a raw material for the production of calcium carbide. The method comprises the following steps: (1) respectively pulverizing semicoke, quick lime, coal and a binder to obtain a semicoke powder, a quick lime powder, a coal powder and a binder powder; (2) respectively drying the semicoke powder, the quick lime powder, the coal powder and the binder powder; (3) mixing the dried semicoke powder, the dried quick lime powder, the dried coal powder and the dried binder powder at the preset ratios to obtain a mixed material; (4) compressing and molding the mixed material to obtain the prepared molding material; and (5) pyrolyzing the prepared molding material to obtain the raw material for the production of calcium carbide. By using the method, the molding material with excellent cold strength, heat strength and fall strength is effectively prepared, and in addition, an effective solution is found for the recycle of the powdery semicoke.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular, the invention relates to a molding method of raw materials for calcium carbide production. Background technique [0002] my country's lignite, long-flame coal and other low-metamorphic coal reserves are abundant, and its calorific value is low, and its volatile matter content is high, which can reach more than 30%. When it is directly used for combustion, it not only has low energy utilization rate, but also causes great pollution to the environment. And the low-temperature pyrolysis of coal (500-800 ℃) can get gas, tar and powdery semi-coke. This method of refining the different quality components rich in coal according to the value can greatly increase its utilization value. Among them, the content of powdered semi-coke in the low-temperature pyrolysis product of coal low-temperature pyrolysis accounts for about 15% by weight. Due to the difficulty in utilization of powdered semi...

Claims

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Application Information

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IPC IPC(8): C10B53/00C10B53/04C10B57/04C10B57/06C01B32/942
CPCC10B53/00C10B53/04C10B57/045C10B57/06
Inventor 王辉刘涛高建丁力吴道洪
Owner SHENWU ENVIRONMENTAL TECH CO LTD
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