/pdf/effects-of-gas-components-reservoir-property-and-pore-2ucmyxk4.pdf

Effects of gas components, reservoir property and pore structure of shale gas reservoir on the competitive adsorption behavior of CO2 and CH4

The invention discloses a method of coal blend coking, comprising the steps as follows: blending various single coking coal as follows in percentage by weight: 1-5 percent of gas-fat coal, 5-15 percent of fat coal, 25-35 percent of 1/3 coking coal with Vdaf larger than 29 percent, 3-10 percent of Indonesia coal, 25-35 percent of coking coal with the Vdaf smaller than 27 percent and 10-15 percent of lean coal, wherein, to the Indonesia coal, the Vdaf is between 27-29 percent, the Y value is no more than 25mm and the maximum reflectance of vitrinite is 10-115 percent, the G value is larger than 85, the initial softening temperature is larger than 400 DEG C, the maximum fluidity temperature is between 450-470 DEG C, the Gieseler fluidity maximum value is smaller than 500ddpm, the Audiberts-Arnu dilatation b percent is larger than 100 percent, and the coking coarse mosaic is over 60%; and the G value of mixed coal is 79-82, the Gieseler fluidity of the mixed coal is 400-1000ddpm, and the Audiberts-Arnu dilatation (a+b) percent of the mixed coal is 30-40 percent

Method of coal blend coking

The invention discloses a Russian fat coal participant coking and coal blending method, which comprises a step of mixing and blending various single coking coals. The single coking coals in percentage by weight comprise 0-6 percent of gas coal, 8-12 percent of Russian fat coal, 15-18 percent of 1/3 coking coal of G being more than 85, 12-15 percent of 1/3 coking coal of G being less than 85, 15-20 percent of coal of G being more than 85, 20 percent of coal of G being less than 85 and 15-20 percent of lean coal. Under the process condition without stage crushing, coal briquette process or tamping coking, the method of the invention reasonably and efficiently utilizes the Russian fat coal, the coke quality is not deteriorated, and the coal blending cost can be reduced.

Russian fat coal participant coking and coal blending method

The invention discloses a coking and coal blending method with participation of fat coal, which comprises the step of blending various coking coals, wherein the various coking coals comprise fat coal No.1, air fertilizer coal, coking coal and 1/3 coking coal; the dry ash-free basis volatile matter (Vdaf) of the fat coal No.1 is less than 28 percent, the Y vale is greater than 25mm, and the maximum Gieseler fluidity (MF) is less than 10000ddpm; the MF of the air fertilizer coal is greater than or equal to 60000ddpm, and the Arnu-Audibert's dilatometer b value is greater than or equal to 220 percent; and the caking index G value of briquette blend is 79-83, the MF is 400-2000ddpm, and the Arnu-Audibert's dilatometer b value is less than 10 percent. According to the coking and coal blending method, the coking coal resources can be utilized reasonably, the coal blending cost is reduced, the CSR of the coke refined through a coke oven with the height of more than 6m is greater than 63 percent under the technological conditions of non-step crushing, coal moisture control, briquette coal process or tamping coking and the like.

Coking and coal blending method with participation of fat coal

The invention discloses a coking coal blending method using high-expansion coking coal. In the method, the Aoya expansion degree b, the caking index G and the proportion of the coking coarse-grain mosaic texture in the blended coal are used as control indexes; and by increasing the dosage of the weakly-caking gas coal and lean coal, limiting the dosage of fat coal and mixing with the high-expansion coking coal, gas fat coal, 1/3 coking coal, coking coal 1# and coking coal 2# to prepare the blended coal, the coking coal 1# can be partially replaced by the high-expansion coking coal, and the coal blending cost is remarkably reduced, wherein in the high-expansion coking coal, the caking index G is greater than or equal to 85, the maximum thickness Y of the gelatinous layer is 18-23mm, the proportion of the dry-ash-free volatile component Vdaf is 23-25%, the maximum Gieseler fluidity lgMF is 3-4, the Aoya expansion degree b is greater than 80%, and the proportion of the single coal coking coarse-grain mosaic texture is greater than 60%; in the coking coal 1#, the proportion of the coking coarse-grain mosaic texture is greater than 60%, and the Aoya expansion degree b is less than 60%; and in the coking coal 2#, the proportion of the coking coarse-grain mosaic texture is less than 60%. Moreover, without the technological conditions of graded breaking, coal moisture control, briquetting technology, tamping coking and the like, the CSR of the coke smelted by a coke oven higher than 6m is greater than 63%.

Coking coal blending method using high-expansion coking coal

The invention relates to a method for 1/3 coking coal to participate in coking and blending coal. The method comprises the following steps: (1) detecting the 1/3 coking coal; (2) classifying the 1/3 coking coal according to a detection result of the step (1); and (3) blending the coal. The invention carries out reasonable classifying and blending according to the 1/3 coking coal of each mineral site by characteristics, such as coal rock indexes, technological properties, a microstructure and the like, divides the 1/3 coking coal into four classes, controls the weight percent of each class of 1/3 coking coal in coking and blending coal and enhances the quality stability of coke.

Method for 1/3 coking coal to participate in coking and blending coal

The invention relates to a method for determining the optical particle size of finely ground gas coal participating in coking and coal blending, which comprises the following steps: firstly, grinding the gas coal according to the different particle size grinding grades; secondly, mixing with a single coal respectively by the same proportion, and obtaining the mixed coal; thirdly, placing all the mixed coal in crucibles respectively, heating at the temperature of 850 DEG C plus or minus 10 DEG C for 13-20 minutes, and weighing the coke weight m respectively; fourthly, rotating in a caking index rotary drum for 250 plus or minus 50 turns respectively, screening respectively, and weighing the coke weight m1 respectively; fifth, further placing into the caking index rotary drum for rotating for 250 plus or minus 50 turns, screening, and weighing the coke weight m2 respectively; sixth, putting all the m, m1 and m2 into a formula that X is equal to (30*m1+70* m2)/m+10 for calculation; and seventh, determining the particle size value with the maximum X value as the optimal particle size of the finely ground gas coal The method can ensure the reasonable particle size of the coal entering a furnace and lead the quality of the produced coke to be stable

Method for determining optimal particle size of finely ground gas coal participating in coking and coal blending

The invention relates to a coking and coal blending method that poor and lean coal participates in, which comprises the step of blending each single coking coal; each single coal comprises the following components according to the mixture ratio by weight percent: 5-10% of gas rich coal, 20-37% of 1/3 coking coal, 0-15% of rich coal, 25-32% of coking coal and 20-25% of poor and lean coal; the cementation index G of the 1/3 coking coal is greater than 84; the cementation index G of the coking coal is greater than 82; the cementation index G of the poor and lean coal is greater than 10-20; and the granularity of the poor and lean coal is determined by the following steps: step (1): pulverizing the poor and lean coal with the cementation index G greater than 10-20 according to different granularity pulverization grades and preparing coal samples with different granularity grades; step (2): detecting the coal samples prepared in step (1) to obtain the self-cementation strength index of each coal sample; and step (3): determining the granularity of the poor and lean coal. The coking and coal blending method can enhance the quality stability of coke.

Zhang Xuehong

Papers

Method of coal blend coking

Method for 1/3 coking coal to participate in coking and blending coal

Method for determining optimal particle size of finely ground gas coal participating in coking and coal blending

Coking and coal blending method that poor and lean coal participates in

Russian fat coal participant coking and coal blending method