Xue Gaifeng

Bio: Xue Gaifeng is an academic researcher. The author has contributed to research in topics: Coal & Coke. The author has an hindex of 10, co-authored 178 publications receiving 575 citations.

Coal coking blending method

Abstract: The present invention is coking blend method with gas coal, and different kinds of coking coal with required vitrinite reflectance distribution are blended. The blended coals include gas-fat coal 5-10wt%, fat coal 5-20 wt%, 1/3 coking coal 30-45 wt%, coking coal 30-45 wt% and lean coal 10-18 wt%. The method of the present invention has reasonable utilization of the coking coal resource, accuratecoal blending and high coke quality.

Method of coal blend coking

Abstract: 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 for 1/3 coking coal to participate in coking and blending coal

Abstract: 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 determining optimal particle size of finely ground gas coal participating in coking and coal blending

Abstract: 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

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

Abstract: 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.

High-proportion coal blending and coking method

Abstract: The invention relates to a high-proportion coal blending and coking method, wherein the coal blending varieties for coking used in the method comprises gas coal, fat coal, coking coal, lean coal and one third of coking coal. The coking method comprises the following steps: A. crushing raw coals separately, wherein crushed particle grade is less than 3mm, and the coal with particle size being lessthan 2mm accounts for more than 60% of the raw coal; and B. carrying out basic coal blending coking on the raw coals obtained in step A, wherein anhydrous ash-free basis volatile matter (Vdaf) of thebasic coal blending quality is 26.0-30.0%, the averagely maximum reflectance (MMR) of vitrinite is 1.0-1.1%, ash content (Ad) is less than 10.1%, total sulfur (St, d) is less than 1.1%, caking index (G) is more than 74, maximum thickness of a gelatine layer is more than 18mm and ratio between active components and inert components is 1.7-1.8. The coal blending coking method of the invention can enlarge coking coal source, lower ash content, sulfur content and phosphorus content in coke, reduce production cost of enterprises, increase economic benefit, improve competitiveness of enterprises, and achieve good comprehensive benefit.

Strength determination method and device for reacted blast furnace coke

Abstract: The invention discloses a strength determination method for reacted blast furnace coke, which comprises the following steps of: (1) placing a coke sample in a reactor; (2) putting the reactor in an electric heating furnace; (3) inserting a temperature thermocouple into the coke in the reactor;(4) putting an electronic balance on a lifting table and connecting the electronic balance and the reactor through a chain; (5) regulating the electric furnace to heat through a temperature controller and introducing nitrogen when the temperature in the center of a material layer reaches 400 DEG C; (6) introducing carbon dioxide gas when the temperature in the center of the material layer reaches 780 DEG C; (7) cutting the nitrogen and introducing prepared mixed gas when the temperature in the centerof the material layer reaches a certain value, maintaining the temperature of the heating furnace, and when the loss ratio of the coke samples reaches the required value continuously introducing the carbon dioxide gas or the mixed gas, introducing the nitrogen and cooling after the carbon dioxide gas or the mixed gas reaches the specified dissolve loss quantity; and (8) stopping introducing the nitrogen and cooling naturally when below 100 DEG C. The invention more truly reflects the actual conditions of the coke in a blast furnace, and the prediction of the thermal properties of the coke is more accurate.

Method of coal blend coking

Abstract: 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

Russian fat coal participant coking and coal blending method

Abstract: 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.