Method for coal blending for coking by high-metamorphic-grade weak caking coal

A coal blending coking and high metamorphism technology, which is applied in coking ovens, special forms of dry distillation, petroleum industry, etc., can solve the problems of large particles, easy cracks, and difficult crushing, so as to achieve reasonable utilization of coal resources, reduce coke cracks, and improve The effect of coke quality

Inactive Publication Date: 2013-03-27
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF1 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pretreatment of coal materials includes increasing the bulk density of coal for furnace charging and regulating the particle size of coal materials. In order to improve the quality of coke and increase the amount of weakly caking coal, coking plants usually use appropriate coal in production according to their own characteristics. The process regulates the particle size of coking coal materials, mainly including the process of mixing first and then pulverizing, and the separate pulverization process for coal materials and components with special requirements on particle size; in the process of mixing first and then pulverizing, it is difficult to pulverize coal materials with high metamorphism and weak cohesion , larger particles, prone to segregation during furnace loading, resulting in uneven mixing of active components and inert components, prone to cracks during semi-coke shrin

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for coal blending for coking by high-metamorphic-grade weak caking coal
  • Method for coal blending for coking by high-metamorphic-grade weak caking coal
  • Method for coal blending for coking by high-metamorphic-grade weak caking coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Determine the optimum pulverization particle size of coal material: see Table 1 for the thermal performance of coking with different particle sizes of highly metamorphic coal material (lean coal).

[0026] Table 1: Thermal properties of coking with different particle sizes of highly metamorphic coal materials

[0027]

[0028] It can be seen from the CRI and CSR in Table 1 that the optimum pulverization particle size of lean coal is 0.1 mm under this ratio.

[0029] (2) Compression of coal briquettes: see Table 2 for the proportion of mixed coal materials.

[0030] Table 2: Proportion of mixed coal materials (weight %)

[0031] coal sample 1 / 3 coking coal coking coal Fat coal lean coal Coal 1 ratio 21.5 60.2 18.3 - Coal 3 ratio 20 56 17 7

[0032] 0.74kg of lean coal finely crushed to 0.1mm is mixed evenly with 9.76kg of coal 1, cold-pressed and formed, and 24.5kg of conventional particle size blended coal is mixed with th...

Embodiment 2

[0034] (1) Determining the optimum pulverization particle size of coal materials: see Table 3 for the thermal performance of coking with different particle sizes of highly metamorphic coal materials (anthracite).

[0035] Table 3: Thermal properties of coking with different particle sizes of highly metamorphic coal materials

[0036]

[0037] From the CRI and CSR in Table 3, it can be seen that the optimum crushing particle size of anthracite is 0.2 mm under this ratio.

[0038] (2) Compression of coal briquettes: See Table 4 for the proportion of mixed coal materials.

[0039] Table 4: Proportion of mixed coal materials (weight %)

[0040] coal sample 1 / 3 coking coal coking coal Fat coal anthracite Coal 1 ratio 21.5 60.2 18.3 - Coal 3 ratio 20 56 17 7

[0041] 0.74kg of anthracite finely crushed to 0.1mm and 9.76kg of coal 1 are evenly mixed, cold-pressed and molded, and 24.5kg of conventional particle size blended coal is mixed wit...

Embodiment 3

[0043] (1) Determining the optimum pulverization particle size of coal materials: see Table 5 for the thermal performance of coking with different particle sizes of highly metamorphic coal materials (lean coal).

[0044] Table 5: Thermal properties of coking with different particle sizes of highly metamorphic coal materials

[0045]

[0046] From the CRI and CSR in Table 5, it can be seen that the optimum pulverization particle size of lean coal is 0.2mm under this ratio.

[0047] (2) Compression of coal briquettes: See Table 6 for the proportion of mixed coal materials.

[0048] Table 6: Proportion of mixed coal materials (weight %)

[0049] coal sample 1 / 3 coking coal coking coal Fat coal lean coal Coal 1 ratio 25.2 59.4 15.4 - Coal 3 ratio 23 54 14 9

[0050] 0.95kg of anthracite finely crushed to 0.1mm and 9.55kg of coal 1 are evenly mixed, cold-pressed and molded, and 24.5kg of conventional particle size blended coal is mixed wi...

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

No PUM Login to view more

Abstract

The invention discloses a method for coal blending for coking by high-metamorphic-grade weak caking coal. The method comprises the following steps of: (1) crushing high-metamorphic-grade coal into different granularity gradients, respectively blending the high-metamorphic-grade coal under each granularity with other caking coals to carry out coking, detecting a quality index of obtained coke and determining the best crushing granularity of the high-metamorphic-grade coal; (2) blending non-high-metamorphic-grade coals in the blended coal and dividing into a coal part 1 and a coal part 2, blending the high-metamorphic-grade coal which is crushed to the best granularity with the coal 1 according to the previous proportion and pressing and molding a coal block, and mixing the high-metamorphic-grade coal which is crushed to the conventional granularity with the coal 2 according to the previous proportion to obtain blended coal 3; and (3) mixing the molded coal block with the blended coal 3 obtained by the step (2) and coking. The method disclosed by the invention can improve the adding amount of the weak caking coal on the premise that the quality of the coke is guaranteed, so that the effects of reasonably utilizing a coal resource and optimizing a coal blending structure are realized.

Description

technical field [0001] The invention relates to a coal blending and coking method, in particular to a method in which highly metamorphic and weakly caking coal materials participate in coal blending and coking Background technique [0002] With the improvement of coke quality requirements for large-scale blast furnaces, the contradiction between the over-reliance on strong caking coal and the shortage of high-quality coking coal resources in coking coal blending has become increasingly prominent. On the premise of ensuring the quality of blast furnace coke, new coal Material pretreatment technology and rational use of weakly cohesive coal materials for coking have become an important way for the coking industry to optimize coal blending structure, reduce coking costs, and save coking coal resources. The pretreatment of coal materials includes increasing the bulk density of coal for furnace charging and regulating the particle size of coal materials. In order to improve the q...

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
IPC IPC(8): C10B57/04C10B53/08
Inventor 梁英华谢全安闫立强陈君安孙章王杰平胡金山李国江
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap