Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing coking coal by hydrogenating low-rank coal under catalysis of Ca

A low-rank coal and coking coal technology, applied in the field of coal modification, can solve problems such as complicated operation and impact on coke quality, and achieve the effect of improving component distribution and improving cohesiveness

Active Publication Date: 2020-07-14
TAIYUAN UNIV OF TECH
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problems existing in existing modification methods, such as the use of organic solvents, the presence of K, Na, S in the catalyst, which affects the quality of coke and complicated operation, etc., and provides a method for producing coking coal by Ca-catalyzed hydrogenation of low-rank coal, aiming at In the conservation and protection of scarce coking coal resources, make full use of low-rank coal, a non-caking coal resource with large reserves

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The test was carried out by hydrogenation of non-caking coal to produce coking coal.

[0023] 60g of 200-mesh non-caking coal, 80g of water and 2g of Ca-based catalyst (CaO 1.6g, Fe 2 o 3 0.3g, CeO 2 0.1g) into a high-temperature and high-pressure reactor and mix evenly, introduce a reducing gas mainly composed of CO, adjust the initial pressure to 4.5MPa (the content of CO is 95%), raise the temperature to 330°C, and the active hydrogen H·hydrogen supply is 16mol / kg of coal, and react for 60 minutes. After the reaction, cool the reactor to room temperature, take out the reaction materials, and separate the solid and liquid by filtration. The separated solid is the modified coal that can partially replace the coking coal.

[0024] The solid product was measured according to GB / T 5447-1997 by a cohesive index tester, and the cohesive index of the product was 93.

Embodiment 2

[0026] The coking coal produced by hydrogenation of weakly caking coal was tested.

[0027] 60g of 200 mesh weak caking coal, 70g of water and 1g of Ca-based catalyst (CaO 0.8g, FeO 0.15g, Ce 3 o 4 0.05g) into the reactor and mixed evenly, and the reducing gas mainly composed of CO was introduced, the initial pressure was adjusted to 4MPa (the content of CO was 90%), the temperature was raised to 320°C, and the amount of active hydrogen H·hydrogen supplied was 13.5mol / kg coal , and reacted for 45 minutes. After the reaction was completed, the reactor was cooled to room temperature, the reaction materials were taken out, and the solid and liquid were separated by filtration. The separated solid was the modified coal that could partially replace the coking coal.

[0028] The solid product was tested according to GB / T 5447-1997 by a caking index tester, and the caking index of the product was 90.

Embodiment 3

[0030] Experiment on producing coking coal by hydrogenation of long-flame coal

[0031] 200 mesh long flame coal 60g, water 60g and catalyst 1g (CaCO 3 0.85g, FeO 0.1g, CeO 2 0.05g) into a high-temperature and high-pressure reactor and mix evenly, introduce a reducing gas mainly composed of CO, adjust the initial pressure to 4.5MPa (the content of CO is 96%), raise the temperature to 335°C, and the active hydrogen H·hydrogen supply is 16.5mol / kg coal, react for 60 minutes, after the reaction is finished, cool the reactor to room temperature, take out the reaction material, filter and separate the solid and liquid, the separated solid is the modified coal that can partially replace the coking coal.

[0032] The solid product was tested according to GB / T 5447-1997 by a caking index tester, and the caking index of the product was 95.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle size (mesh)aaaaaaaaaa
boiling pointaaaaaaaaaa
cohesion indexaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing coking coal by hydrogenating low-rank coal under the catalysis of Ca. The invention belongs to the technical field of coal modification, the problems that in an existing modification method, an organic solvent and a catalyst including K, Na, S and the like can influence the coke quality and the operation is complex are solved. The method comprises the following steps: mixing low-rank pulverized coal, water and a Ca-based catalyst, and performing reacting; controlling the reaction process by regulating and controlling the temperature, the CO partial pressure, the active hydrogen H-hydrogen supply amount and the reaction time; enabling the low-rank coal to be subjected to pyrolysis to generate the medium molecular free radical group, and controlling the hydrogenation reaction during the low-rank coal tackifying process well under the action of the appropriate active hydrogen H-hydrogen supply so as to improve the component distribution ofthe product, achieve the significant tackifying effect of the low-rank coal, and become the high caking coal capable of partially replacing the coking coal.

Description

technical field [0001] The invention belongs to the technical field of coal modification, and in particular relates to a method for preparing coking coal by Ca-catalyzed hydrogenation of low-rank coal. Background technique [0002] my country is rich in coal resources, but coking coal resources are insufficient, and the proportion of high-quality coke fat coal is even less. In addition, my country is the world's largest steel producer and the blast furnace is becoming larger and larger, so the quality requirements of coke fat coal are getting higher and higher. , the price of coking fat coal has doubled, and the supply has been in short supply in many areas. Among the proven reserves, low-rank coal accounts for a high proportion and is cheap. Most of them have the characteristics of low phosphorus and low sulfur. The shortcomings of high moisture, high volatile matter, low carbon content and low calorific value have not been fully utilized. Using modification technology to con...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/04C10B57/04
CPCC10B57/04C10L9/04
Inventor 赵钰琼魏永永何守琪王琪王影张永发
Owner TAIYUAN UNIV OF TECH