对万盛白云石的热分解动力学进行了研究,并对该白云石煅烧工艺进行了正交实验,考虑了烧损温度、时间和粒度对锻白烧损率和水化活性的影响。动力学计算表明白云石的热分解过程中,活化能为148.16kJ/mol。煅烧正交实验表明白云石烧损率的影响因素的顺序为温度、时间、粒度,而水化活性的影响因素的顺序为温度、粒度、时间。优化后的煅烧工艺为温度1050℃,时间1.5h,白云石粒度6～13mm,在此工艺下,万盛白云石的烧损率为46.55%,水化活性为32.07%。
The decomposition kinetics of Wansheng dolomite was investigated.The effects of temperature,time and particle size of dolomite on burning rate and hydration activity of calcined dolomite were studied.The dynamics calculations showed that the activition energy of the dolomite thermal decomposition was 148.16kJ/mol.The result of orthogonal experiments showed that temperature was the greater influence than time and particle size on burning rate and hydration activity of calcined dolomite.The best calcination condition was temperature 1050℃,time 1.5h and particle size 6-13mm,which the burning rate and hydration activity of calcined dolomite were 46.55% and 32.07%,respectively.
参考文献
| [1] | 李穆武,沈玉明.石灰石矿白云石的综合开发利用[J].矿业快报,2001(05):1-3. |
| [2] | I.M. MORSI;K.A. ELBARAWY;M.B. MORSI .SILICOTHERMIC REDUCTION OF DOLOMITE ORE UNDER INERT ATMOSPHERE[J].Canadian Metallurgical Quarterly,2002(1):15-28. |
| [3] | 高家诚,陈小华,唐祁峰.氟化钙催化碳热还原氧化镁的实验研究[J].功能材料,2012(10):1312-1315. |
| [4] | 李明德,秦勇.白云石的开发与利用[J].矿产保护与利用,1996(05):17-19. |
| [5] | 程良管.白云石资源综合利用的途径[J].矿产保护与利用,1990(04):33-37,32. |
| [6] | 白云山 .白云石、菱镁矿生产高纯度碳酸镁和氧化镁新工艺研究[D].陕西师范大学,2005. |
| [7] | 尹荔松,陈敏涛,李婷,周克省,高松华.白云石制备菱面片层纳米氧化镁[J].物理化学学报,2007(03):433-437. |
| [8] | 蒋引珊,王玉洁,徐长耀,薛俊.热分析法研究矿物分解过程动力学[J].长春科技大学学报,2000(01):90-93. |
| [9] | 郑红霞,廖新生,汪琦,李静.菱镁矿粉及其料球分解的TG动力学[J].辽宁科技大学学报,2008(01):29-31. |
| [10] | 王世杰,陆继东,胡芝娟,周琥,张步庭.水泥生料分解动力学的研究[J].硅酸盐学报,2003(08):811-814. |
| [11] | 唐祁峰,高家诚,陈小华,邹钢,黄宝林.万盛白云石热分解行为及影响因素[J].轻金属,2011(03):47-51. |
| [12] | Freeman E S;Carroll B .The application of themoranalytical techniques to reaetion kineties[J].Journal of Physical Chemistry,1958,62:394-397. |
| [13] | Coats A W;Redfern J P .Kinetic parameters from thermogravimetric data[J].Nature,1964,201(04):68-69. |
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