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Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Clean Coal Technology is the property of Clean Coal Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to improve the concentration of coal water slurry (CWS) for gasification with lignite, the slurryability of three coal samples which were provided by an chemical enterprise was conducted through traditional CWS preparation process and classified grinding process. Then the CWS preparation with blending coal was carried out. The results showed that, prepared by traditional process, the highest pulp concentration of Dongming coal, Zhalainuoer coal, Baokuang upgrading coal were 48.54%, 51.76%, 56.08%. Prepared by classified grinding process, the highest pulp concentration of above three CWS were 51.72%, 54.82%, 59.21%, which were above 3% higher than the concentration of CWS prepared by traditional process. When the mass ratio of Dongming coal and Zhalainuoer coal was 1 to 1, or the mass ratio of Dongming coal and Baokuang upgrading coal was 2 to 1, the concentration of CWS were 53.12% and 54.21%, which met the design requirements. [ABSTRACT FROM AUTHOR]

To improve coke quality and decrease manufacturing cost, the gas coal, fat coal and Dongfeng coal were adopted to coke individually, which are frequent in the north of Shaanxi Province. The coke quality were analysed. Based on the results, these three kinds of coals were coked in different proportions. Determined the optimum coal blending scheme by analyzing the coke quality. The results show that, the coke quality is poor while only adopts gas coal. But the blending of gas coal increases gas production rate and coke shrinking rate. The fat coal is superior, while coking alone, the porosity of coke is high. Dongfeng coal can't coke alone, while its addition improves coke intensity and decreases superior coal consumption. When the mass ratio of gas coal, fat coal and Dongfeng coal is 1 : 6 : 3, the coke quality is the best, the pore is smaller. The coke shows silver, there is no cavernous body. The maximum thickness of plastic layer is 20. 4 mm, the final shrinkage degree is 7. 2 mm. [ABSTRACT FROM AUTHOR]

In order to expand the coking coal resources and reduce the cost of coal blending, taking the middle and high sulfur lean coal as the test sample, which is taken from No. 10 coal seam of western areas of Weibei coalfield in the southern of Erdos Basin. The middle and high sulfur lean coal contains low ash, its bond index and thickness of plastic layer is higher than that of generally lean coal, the inert and alive of petrography is close to 2, and the coking property is well. Through the coking test of middle and high sulfur lean coal, simulated coal blending of coal petrography, industrial coke oven coking test, verify the feasibility and determine the optimizations of middle and high sulfur lean coal blending coking. The results show that middle and high sulfur lean coal can be used in coal blending for coking, the blending content of middle and high sulfur lean coal should be controlled below 10%, and high content of strong caking index blending coal can enhance the thermal state index of coke. According to coal blending coking in industrial application of middle and high sulfur lean coal, show that using middle and high sulfur lean coal coking can produce quality qualified coke blending ratio of 3%~7%, expand coking coal resources and reduce the cost of blending coal using middle and high sulfur lean coal coking. [ABSTRACT FROM AUTHOR]

The analysis of raw coal supplied to Lijiahao coal preparation plant show that, it's low-medium ash and sulfur, extra low phosphorns, high calorific value non-caking coal and long flame coal. There are lots of gangue in raw slime and the gangue is easy to degrade, so it needs to minimize the contact time between coal, gangue and water during separation. The ash of secondary slime is 74.23%,the gangue degrade seriously and mainly exist in -0.045 mm fine slime. Transform the coal preparation plant by improving management, reforming coal handing equipments, adding supplement coal system, fine slime and gangue discharging systems. After transformation, the raw coal moisture reduces by an average of 3%, the supplement of high-quality coal can improve the coal delivery situation in raw coal bunker, products bunker and coal handing equipments. The fine slime can be recycled rapidly, the calorific value of lump clean coal and mixed slack coal can be improved obviously, the coal preparation plant increases profits 3 x 107 yuan per year. [ABSTRACT FROM AUTHOR]

To prepare high intensity and desulfurized active coke, using Taixi anthracite as the main raw material investigate the influence of formulation of raw material coal, activation time and steam velocity on the preparation. The results show that, using pure clean anthracite as raw material, when the activation temperature is 850 °C, the activation time is 15 minutes, steam flow rate is 6.2 mL/min, the maximum iodine value of activated coke sample is 356 m/g, the minimum intensity is 99.18 percent. The desired iodine value ranges from 300 mg/g to 400 mg/g, the intensity should be greater than 99 percent. So it is good preparation technology parameters of activated coke. When the mass ratio of Taixi anthracite and other type of coal is 75 : 25, activation temperature is 850 °C, the activation time is 15 minutes, steam flow rate is 4 mL/min, the iodine value of activated coke sample is 320 mg/g, the intensity is 99.2 percent, the adsorption properties of activated coke and wear-resisting performance are the best. [ABSTRACT FROM AUTHOR]