CN102604658A - Coking coal blending method using weakly-caking coking coal - Google Patents

Abstract

The invention discloses a coking coal blending method using weakly-caking coking coal. In the method, the proportion of the coking coarse-grain mosaic texture of the blended coal is used as a control index; and by adjusting the dosage of the coking coal 1#, coking coal 2#, fat coal and 1/3 coking coal in the blended coal and mixing the coking coals to obtain the blended coal, the dosage of the weakly caking coal is increased, the coal resources are reasonably used, and the coal blending cost is remarkably reduced, wherein in the coking coal 1#, the proportion of the coking coarse-grain mosaic texture is greater than 60%; in the coking coal 2#, the proportion of the coking coarse-grain mosaic texture is less than 60%; in the fat coal, the caking index G is greater than 85, the proportion of the dry-ash-free volatile component Vdaf is less than 32%, and the maximum thickness Y of a gelatinous layer is greater than 25mm; and in the 1/3 coking coal, the caking index G is greater than or equal to 85, and the proportion of the coking coarse-grain mosaic texture is greater than 40%. Moreover, without the coal moisture control and briquetting technology and the pre-crushing technique, the CSR of the coke smelted by a coke oven higher than 60m is greater than 63%.

Description

The coke making and coal blending method that a kind of weak cohesiveness coking coal is participated in

Technical field

The invention belongs to the coke making and coal blending technical field, be specifically related to a kind of method of coke making and coal blending, relate to the coke making and coal blending method that a kind of weak cohesiveness coking coal is participated in especially.

Background technology

Bottle coal and meager lean coal all belong to weak cohesiveness coking coal.Bottle coal is the coking coal that a kind of metamorphic grade is low, volatile matter is high, cohesiveness a little less than, the plastic mass less stable; Meager lean coal is that a kind of metamorphic grade is high, volatile matter is low, a little less than close-burning coking coal; All be that quick coking plays coking central role in coal-blending coking.The independent coking charred coal organization of bottle coal is main with isotropic structure and inertia structure, and the independent coking of meager lean coal is main with fiber, sheet and inertia structure, though these two kinds of constitutional featuress are different, the STRENGTH ON COKE quality all has the deterioration effect.So, though these two kinds the independent coking gained of coking coal coke lumpiness is big, crackle is few, wear resistance is relatively poor, therefore, in coal-blending coking, generally the consumption with weakly caking coal is controlled at lower scope, causes coal blending cost to maintain higher level always.

Summary of the invention

Technical problem to be solved by this invention provides the coke making and coal blending method that a kind of weak cohesiveness coking coal is participated in, and this method can improve the proportioning of weak cohesiveness coking coal cheaply, reduces coal blending cost, and coking gained coke quality deterioration not.

For solving the problems of the technologies described above; The present invention adopts following technical scheme: the coke making and coal blending method that a kind of weak cohesiveness coking coal is participated in; Comprise the step that each coking coal is mixed, said coking coal comprises weak viscosity coking coal, coking coal 1#, coking coal 2#, rich coal and 1/3 coking coal;

The weight percent of each coking coal is: weak viscosity coking coal: 30-40%; Coking coal 1#:25-40%; Coking coal 2#:0-20%, rich coal: 10-30%; 1/3 coking coal: 0-40%;

And mixed coal coking coarse grain pattern structure ratio is more than 40%;

Said weak viscosity coking coal comprises bottle coal and meager lean coal, and the caking index G value of said bottle coal is 50-70, and the caking index G value of said meager lean coal is 10-20;

Coking coarse grain pattern structure ratio >=60% of said coking coal 1#;

Coking coarse grain pattern structure ratio＜60% of said coking coal 2#;

Caking index G value＞85 of said rich coal, dry ash-free basis volatile matter V _Daf＜32%, maximum thickness of plastic layer Y value＞25mm;

Caking index G value >=85 of said 1/3 coking coal, coking coarse grain pattern structure ratio reaches more than 40%.

The present invention is a controlling index with the coking coarse grain pattern structure ratio of mixed coal; Through regulating the consumption of coking coal, rich coal and 1/3 coking coal in the mixed coal; Not only can increase the consumption of weakly caking coal, rationally utilize the ature of coal resource, significantly reduce coal blending cost; And under processing condition such as no graded crushing, moulded coal technology or tamping coking, at CSR＞63% of coke oven institute coking charcoal more than 6 meters.

Embodiment

Below in conjunction with embodiment the present invention is done further detailed explanation.

The coke making and coal blending method that weak cohesiveness coking coal of the present invention is participated in comprises the step that weak close-burning bottle coal and meager lean coal and coking coal, rich coal and 1/3 coking coal are mixed, each singly kind proximate analysis of coal result see table 1.

The single coal coal analysis result that plants of table 1

The weight percent of each coking coal is: weak viscosity coking coal: 30-40%; Coking coal 1#:25-40%; Coking coal 2#:0-20%; Rich coal: 10-30%; 1/3 coking coal: 0-40%; And mixed coal coking coarse grain pattern structure ratio reaches more than 40%.

The specific embodiment of coal blending scheme is seen table 2.

Table 2 coal blending scheme

Embodiment 1,2,3,4 gained coke all under the condition that does not adopt coal damping, shaped coal technology and precomminution technology, make at coke oven more than 6 meters.

Claims (1)

1. the coke making and coal blending method that the cohesiveness coking coal is participated in a little less than a kind comprises the step that each coking coal is mixed, and it is characterized in that:

Said coking coal comprises weak viscosity coking coal, coking coal 1#, coking coal 2#, rich coal and 1/3 coking coal;

The weight percent of each coking coal is: weak viscosity coking coal: 30-40%; Coking coal 1#:25-40%; Coking coal 2#:0-20%; Rich coal: 10-30%; 1/3 coking coal: 0-40%;

And mixed coal coking coarse grain pattern structure ratio is more than 40%;

Said weak viscosity coking coal comprises bottle coal and meager lean coal, and the caking index G value of said bottle coal is 50-70, and the caking index G value of said meager lean coal is 10-20;

The coking coarse grain pattern structure ratio of said coking coal 1# reaches more than 60%;

Coking coarse grain pattern structure ratio＜60% of said coking coal 2#;

Caking index G value＞85 of said rich coal, dry ash-free basis volatile matter V _Daf＜32%, maximum thickness of plastic layer Y value＞25mm;

Caking index G value >=85 of said 1/3 coking coal, coking coarse grain pattern structure ratio reaches more than 40%.