Study on the Effects of Coal Blending on the Slurry Ability of Shenmu Coals

Abstract:

Shenmu coals as low rank coal are difficult to prepare for Coal Water Slurry (CWS). The maximum slurry concentration of Shenmu CWS is lower than 60%, which is not available for practical application. Coal blending is a simple operation and low cost method to improve the slurry ability of low rank coal. Two different kinds of anthracite and bituminous coal samples were blended in Shenmu coal to study the effect on the preparation of CWS, respectively. The results showed that the maximum solid concentration of CWS increased as the proportion of high rank coal rise. And the viscosity of CWS is dropped at the same concentration. Different coals blending have different effects on the elevation of slurry ability for Shenmu coal. The raw coal with best slurry ability is not always the most suitable for blending in low rank coal. HuanNan bituminous coal is the best choice for blending in Shenmu coal. The maximum solid concentration of CWS can be increased by 6% when the proportion of HuanNan coal reached to 70%.

• Periodical: Advanced Materials Research (Volumes 383-390)
• Pages: 3011-3016
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.383-390.3011
• Online since: November 2011
• Authors: Jian Zhong Liu, Yu Jie Yu, Jun Hu Zhou, Chong Du, Lin Ye, Jun Cheng, Ke Fa Cen
• Keywords: Coal Blending, CWS, Slurryability

References

[1] Li J. Introduction of Texaco Coal Gasification Process; Anhui Chemical Industry: 2001, 1, pp.46-49.

[2] J.S. Laskowski; Rheological Measurements in Mineral Processing Related Reseach; IX B alkan Mineral Processing Congress, Beril Ofset, Istanbul, Turkey: 2001, pp.41-57.

[3] J.S. Laskowski; Does it matter how coals are cleaned for CWS; Coal Prep.: 1999, 21, 105-123.

DOI: 10.1080/07349349908945612

[4] F. Boylu; H. Dincer; G. Atesok, Effect of coal particle size distribution, volume fraction and rank on the rheology of coal-water slurries, Fuel Processing Technology 85 (2004) 241-259.

DOI: 10.1016/s0378-3820(03)00198-x

[5] New Energy and Industrial Technology Development Organisation (NEDO), CWM in Japan, NEDO International Committee, (1997).

[6] J. Natoli; R.C. Mahar; B.R. Bobsein, Polycrylate Thickeners for Coal Water Slurries: Slurry Formation, Stability and Rheology, International Chemical Engineering Symposium Series, vol. 95, 1985, p.17– 36.

[7] YuChi Wei; Li bao-qing; Li Wen et al. Effect of blending various coals on the properties of coal water slurry, Journal of Fuel Chemistry and Technology 2004, 10.

[8] Wu Guo-guang; Wang Xiao-chun; Liu Jiong-tian; Research on the ability of making slurry with NSF as additive for CWS and its effect, Journal of China University of Mining & Technology [J], 2005, 34(6): p.703–706.

[9] Wu Guo-guang , Wang Xiao-chun, Li Q H, et al. Study of the matching performance between additive of coal water slurry and coal molecular structure. Journal of China University of Mining & Technology [J], 2006, 35(4): p.454– 457.

[10] Sun Chen-gong, Wu Jia-shuan, Li Bao-Qing. Surface properties of thermally upgraded low-rank coals and their effect on the rheological behavior of coal water slurry. Journal of Fuel Chemistry and Technology [J], 1996, 24(2): p.174–180.

DOI: 10.1016/s0140-6701(97)80051-3

[11] Li Han-xu , Ji Ming-jun , LI J un , et al Effect of blending coals on the properties of coal water slurry[J ] Coal Preparation Technology , 2001 , (3) pp.: 542561.

[12] Wang Pin-gang, Gu Da-zhao, Song Chang, Technological Research and Application of Shenhua Coal's Efficient, Safe and Clean Burning, Shenhua Science and Technology, 2009. 1: pp.39-46.

[13] Atesok G. The effect of coal properties on the viscosity of coal-water slurries, Fuel [J], 2002, 81(14): 1 pp.855-858.

DOI: 10.1016/s0016-2361(02)00107-2

[14] Li Yan-chang, Liu Jian, Cheng Jun, et al. Improving slurrying property of Shenhua coal, Journal of Liaoning Technical University (Natural Science) [J], 2008sl: pp.296-298.

[15] Wu Jia-shan; Ji Qing-jun; Hao Ai-min et al. Effect of properties of ShenMu coal on the behacious of CWS, Coal Conversion; 1992. 12(4): 69-75.

[16] GU Tian-ye, WU Guo-guang, LI Qi-hui, et al. Blended coals for improved coal water slurries, Journal of China University of Mining & Technology, 18(2008) 0050-0054.

DOI: 10.1016/s1006-1266(08)60011-5

[17] Zhou souzhu, Zhu fengmei, Zhang jizhen, Optimal Coal Proportionin Pressurized Gasification Unit of Water Coal Slurry, Chemical Fertilizer Design[J], 2003(41), pp.32-37.

[18] Ji mingjun, Li hanxu, Yan chunfu, Study on The Preparation of Coal Blends For Coal Water Slurry About Texcao of An Hui Huai Nan Chemical Groups Ltd. Anhui Chemical Industry[J], 2002(6), pp.4-6.

[19] Tang yong-xin, Chen ying, Ji ming-jun, et al. Research on the effects of coal blending on the ash fusing point and coal water slurry. Coal Technology [J]. 2002; 21(11), pp.67-72.

[20] Cheng zhi-qiang, Thermal modification affected to coal water mixture preparation with Shenhua coal, Coal Science and Technology [J] 2007, 6.

[21] Wang zhi-cai, Shui heng-fu, Pei zhan-ning, et al. Study on the hydrothermal treatment of Shenhua coal. Fuel 2008(87): pp.527-533.

DOI: 10.1016/j.fuel.2007.03.017

[22] Cheng jun, Zhou jun-hu, Li yang-chang, et al. Effects of pore fractal structures of ultrafine coal water slurries on rheological behaviors and combustion dynamics, Fuel 2008(87), pp.2620-2627.

DOI: 10.1016/j.fuel.2008.01.028

[23] Cheng jun, Zhou jun-hu, Li yang-chang, et al. Improvement of Coal Water Slurry Property through Coal Physicochemical Modifications by Microwave Irradiation and Thermal Heat, Energy and Fuels 2008, 22, 2422-2428.

DOI: 10.1021/ef7005244