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A method for preparing molded coke from low-modified pulverized coal, heavy oil, and tar residue

A low-modification pulverized coal and tar slag technology, applied in the field of coal chemical industry, can solve the problems of less reserves, less coking coal sources, and difficulty in meeting the development needs of the metallurgical industry, and achieve the effect of expanding the field of use

Inactive Publication Date: 2016-09-28
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most promising solid heat carrier process has heavy tar and semi-coke fine particles adhering to the inner wall of the separator and cooling pipeline, affecting the stable operation of the system, making it difficult to quickly mix and heat the heat carrier and pulverized coal, and pyrolyzing volatile matter. Key issues such as difficult and rapid separation are the bottlenecks that make this technology difficult to promote and apply on a large scale
[0004] Although my country's coal resources are abundant, the distribution of coal sources and coal types is uneven. Except for North China and East China, other provinces and regions have very few sources of coking coal, especially the reserves of main coking coal and fat coal used in coking. , it is difficult to meet the development needs of the metallurgical industry

Method used

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  • A method for preparing molded coke from low-modified pulverized coal, heavy oil, and tar residue
  • A method for preparing molded coke from low-modified pulverized coal, heavy oil, and tar residue

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, a method for preparing molded coke with low metamorphic pulverized coal, heavy oil, and tar residue as raw materials comprises the following steps:

[0035] Step 1, after the low metamorphic pulverized coal and the tar residue are pretreated by grinding and screening, the particle size of the low metamorphic pulverized coal is controlled to 80 mesh, and the particle size of the tar residue is controlled below 3mm;

[0036] Step 2: According to weight percentage, take 70% of low metamorphic coal powder with a particle size of less than 80 mesh, 15% of heavy oil, and 15% of tar residue, and put them together into a beaker for stirring. After the materials are evenly mixed, put them into a mold , cold-pressed under a pressure of 6Mpa to obtain cylindrical briquettes (Φ30mm×20mm).

[0037] In step 3, the prepared coal briquettes are intensively treated at a low temperature of 300° C. for 40 minutes, and then taken out and cooled to room temperatu...

Embodiment 2

[0040] Such as figure 1 As shown, a method for preparing molded coke with low metamorphic pulverized coal, heavy oil, and tar residue as raw materials comprises the following steps:

[0041] Step 1, after the low metamorphic pulverized coal and the tar residue are pretreated by grinding and screening, the particle size of the low metamorphic pulverized coal is controlled to 80 mesh, and the particle size of the tar residue is controlled below 3mm;

[0042] Step 2: According to weight percentage, take 65% low-deteriorated coal powder with a particle size of less than 80 mesh, 15% heavy oil, and 20% tar residue, and put them together into a beaker for stirring. After the materials are evenly mixed, put them into a mold , cold-pressed under a pressure of 6Mpa to obtain cylindrical briquettes (Φ30mm×20mm).

[0043] In step 3, the prepared briquettes are subjected to intensive treatment at a low temperature of 200° C. for 40 minutes, and then taken out and cooled to room temperature...

Embodiment 3

[0046] Such as figure 1 As shown, a method for preparing molded coke with low metamorphic pulverized coal, heavy oil, and tar residue as raw materials comprises the following steps:

[0047] Step 1, after the low metamorphic pulverized coal and the tar residue are pretreated by grinding and screening, the particle size of the low metamorphic pulverized coal is controlled to 80 mesh, and the particle size of the tar residue is controlled below 3 mm;

[0048] Step 2: Take 75% of low-deteriorated coal powder with a particle size of less than 80 mesh, 10% of heavy oil, and 15% of tar residue according to weight percentage, and put them together into a beaker for stirring. After the materials are evenly mixed, put them into a mold , cold-pressed under a pressure of 6Mpa to obtain cylindrical briquettes (Φ30mm×20mm).

[0049] In step 3, the prepared coal briquettes are intensively treated at a low temperature of 300° C. for 40 minutes, and then taken out and cooled to room temperat...

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Abstract

The invention provides a method for preparing formed coke from low-metamorphic pulverized coal, heavy oil and tar residues as raw materials. The method comprises the following steps: firstly, grinding and sieving the low-metamorphic pulverized coal to obtain a raw material powder having a certain particle size, next, evenly mixing the low-metamorphic pulverized coal, the heavy oil and the tar residues together, performing pressure forming in a forming die, performing drying and strengthening treatment on the prepared briquette coal under a low temperature condition, and putting the treated briquette coal into a destructive distillation device for pyrolysis, thereby obtaining the formed coke, coal tar and gas, wherein the gas can be taken as a fuel gas or a chemical raw material gas; and the liquid oil is treated by fractionation to obtain a heavy oil and a light oil, the light oil is treated by hydrogenation for producing a fuel oil, and the heavy oil and the tar residues can be recycled to the briquette coal preparation process. The method is mainly applied to the medium-low temperature pyrolysis and upgrading and grading of the low-metamorphic pulverized coal, and is capable of recycling the tar and the hydrogen-enriched gas in the pulverized coal to the utmost extent while obtaining the formed coke product; and in short, the method has the characteristics of simple process, high production efficiency, high pyrolysis speed, good forked coke strength, good formed coke strength and high light oil yield.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a method for preparing molded coke by using low-modified pulverized coal, heavy oil and tar residue as raw materials. Background technique [0002] In my country's coal resources, low-metamorphic bituminous coal (long-flame coal, non-caking coal, weakly caking coal) reserves are extremely rich, accounting for about 51% of the total coal resources in the country, mainly concentrated in the borders of Shaanxi, Shanxi, Ningxia, Mongolia and Gansu Since the volatile content of this coal can reach more than 30%, semi-coke, coal tar and gas are obtained through medium and low temperature dry distillation process, which is the main means for its graded quality improvement, high-efficiency transformation and comprehensive utilization. [0003] The low-metamorphic coal resources in northern Shaanxi mainly adopt the internal heating vertical furnace production pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/08C10B57/06
CPCC10B55/02C10B57/10
Inventor 宋永辉苏婷尚文智刘漫博贺文晋马巧娜
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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