1/3焦煤和肥煤參與配煤煉焦的比較

第36卷第3期武漢科技大學(xué)學(xué)報Vol. 36,No. 32013年6月Journal of Wuhan University of Science and TechnologyJun.20131/3焦煤和肥煤參與配煤煉焦的比較張雪紅' ,薛改鳳',劉睿,李笑 原”(1.武漢鋼鐵(集團)公司研究院，湖北武漢,430080;2.武漢平煤武鋼聯(lián)合焦化有限責任公司,湖北武漢,430082)摘要:對1/3焦煤和肥謀進(jìn)行煤質(zhì)分析,并對其單種煤的成焦光學(xué)組織、焦炭強度及參與配煤后對焦炭性能的影響進(jìn)行比較。結果表明,當肥煤的膠質(zhì)體質(zhì)量一般或較差時(shí),在配合煤中的作用與優(yōu)質(zhì)1/3焦煤相當，生產(chǎn)中兩種煤可進(jìn)行互換,但應針對調節焦炭冷、熱性能的不同需要確定不同的配比。關(guān)鍵詞:1/3焦煤;肥煤;配煤煉焦;冷強度;熱強度中圖分類(lèi)號:TQ533.3文獻標志碼:A文章 編號:1674-3644(2013)03-0210-04我國煤炭資源豐富,但煉焦煤儲量有限,且各1998規定在MSP-200顯微鏡上進(jìn)行。煤的膠質(zhì)煤種分布不均。目前,我國煉焦用主要煤種有氣層指數測定按照GB/T 479- -2000 規定進(jìn)行。煤煤、1/3焦煤、氣肥煤、肥煤、焦煤、瘦煤、貧瘦煤。的基氏流動(dòng)度測定按照ASTM-D 2639- -04規定其中肥煤僅占煉焦煤儲量的12%,和焦煤同屬稀進(jìn)行(4。煤的奧亞膨脹度測定按照GB/T缺煤種,是煤炭利用中的重要保護對象川]。1/3 .5450- -97規定進(jìn)行。焦煤是介于焦煤、肥煤和氣煤之間的過(guò)渡煤種,是焦炭光學(xué)組織測試按照YB/T 077- -1995在-種含中等或較高揮發(fā)分、黏結性較強的煤[2,其MSP-200顯微鏡上進(jìn)行,采用數點(diǎn)統計法統計數儲量相對豐富,在煉焦煤種查明資源儲量中占較據。焦炭結構強度測定參照前蘇聯(lián)T0CT9521大比例,它和氣煤的總量達到煉焦煤儲量的45%標準,取粒度為3~6 mm的干燥焦炭樣50 mL,以上3。本研究將肥煤與1/3焦煤進(jìn)行比較,對.稱(chēng)重,放人內徑為25.4 mm、長(cháng)305 mm的不銹二者在煤質(zhì)指標及成焦性能上的差異性及參與配鋼管中,同時(shí)放人直徑為15 mm的鋼球5個(gè),以.煤煉焦后對焦炭質(zhì)量的影響進(jìn)行研究,以期高效25士0. 5 r/min的轉速旋轉800 r后,用1 mm的合理地利用肥煤與1/3焦煤,保護稀缺的煉焦煤，方孔篩在振 篩機上振篩4 min, 用篩上物質(zhì)質(zhì)量以利于資源的可持續發(fā)展。占入鼓焦炭質(zhì)量的百分數作為結構強度(SSI)的值。1試驗試驗用原料為某廠(chǎng)常用的1/3焦煤A和肥2結果與討論煤B.將粒度小于3 mm的1/3焦煤A和肥煤B分2.1單種煤煤質(zhì)及成焦組織與性能分析別置人2 kg小型試驗焦爐中,裝煤堆密度為0.702.1.1 煤質(zhì)分析~0.73 g/cm3 ,按一定升溫曲線(xiàn)升至950 C ,保溫煤樣的煤質(zhì)分析結果如表1所示。3h后自然冷卻,獲得相應的焦炭。根據中國煤炭分類(lèi)標準GB/T 5751- 2009，煤的工業(yè)指標分析按照GB/T 212- -2001 進(jìn)肥煤和1/3焦煤的揮發(fā)分和黏結指數G值存在.行。煤的鏡質(zhì)組反射率測定按照GB/T 6948-交叉范圍,主要區別在于膠質(zhì)層指數Y值和奧亞表1煤質(zhì)分析結果Table 1 Analysis results of coal膠質(zhì)層最大流動(dòng)度/軟化溫度/ 固軟區間/奧亞膨脹度/煤祥Vaur/% As/% S..a/% G厚度/mm__ Rmx/% .ddpmdpmX1/3焦煤A 33.27 9.23 0.69 90.6 28.2 230.9311 5743929C67.9肥煤B30. 609.50 1. 6391.8 36.8 26.21.04104. 3中國煤化工-fYHCNMHG收稿日期:2013-04-01作者簡(jiǎn)介:張雪紅(1979-),女,武漢鋼鐵(集團)公司工程師,碩士. E mail: xhzhang0108@ 163. com212武漢科技大學(xué)學(xué)報2013年第3期炭熱性能的主要因素之一0。肥煤B的單種煤的流動(dòng)性發(fā)揮了作用?？偟膩?lái)說(shuō),1/3 焦煤A的成焦粗粒鑲嵌結構較高,對焦炭熱強度的改善非配人有利于改善焦炭的冷強度,肥煤B的配人則常有利,但又因為其惰性結構偏高,且較高的膨脹有利于改善焦炭的熱性能,但整體變化不是很明度造成焦炭孔隙數量偏多偏大,成焦峰窩狀焦明顯。因此,優(yōu)質(zhì)的1/3焦煤與煤質(zhì)一般或稍差的顯,最終使得肥煤B的焦炭反應后強度CSR偏肥煤可進(jìn)行相互替換配用,但在改善焦炭冷強度、低。熱性能方面應有針對性?？顾閺姸仁墙固康牧芽p率指數,耐磨強度是3結論焦炭的磨損性指標,根據檢測原理,焦炭的抗碎強度和耐磨強度與焦塊的裂縫和孔隙結構有密切關(guān)(1)當肥煤的膠質(zhì)體質(zhì)量一般或較差時(shí),在配系[10]。由表3中可見(jiàn),1/3焦煤A的抗碎強度合煤中的作用與優(yōu)質(zhì)1/3焦煤相當或稍差,二者高，耐磨強度好,表明其裂縫率相對較低,孔隙結可進(jìn)行相互替換。構致密,磨損性能好。(2)1/3 焦煤的配人有利于改善焦炭的冷強表3煤樣成焦焦炭強度度,而肥煤B的配人有利于改善焦炭的熱性能,Table 3 Cold strength and hot strength of coke %兩者如何配用應有針對性。煤樣CMIo1/3焦煤A38. 148.272. 29.8參考文獻肥煤B37. 643. 971.311.1[1] 李安,李萍,陳松梅、煉焦煤深度降灰脫硫的研究2.2配煤對焦炭 質(zhì)量的影響[J].煤炭學(xué)報,2007 ,32(6) :639-642.由于肥煤B與1/3焦煤A的煤質(zhì)指標較接[2]項茹,陳鵬， 薛改鳳.關(guān)于1/3焦煤煤質(zhì)差異研究近,故按表4所示的配煤方案進(jìn)行了二者替代的[J].煤炭科學(xué)技術(shù),2008, 36(11) :105-108.配煤煉焦試驗,結果如表5所示。由表5中可知，[3]杜銘華.中國煉焦煤資源及生產(chǎn)[J].煤質(zhì)技術(shù),2006隨著(zhù)肥煤配用量的增加,焦炭的熱性能稍顯改善，(11);1-3.其反應后強度CSR增大,反應性CRI降低,這主.[4] ASTM D2639-04. Standard test method for plastic要是由于肥煤B的焦炭顯微結構稍?xún)?yōu)于1/3焦properties of coal by the constant torque Gieseler煤A所制焦炭。隨著(zhù)肥煤配用量的增加,焦炭的plastometer[S].冷強度稍劣化,其中抗碎強度稍有改善,而耐磨強[5]孫會(huì )青,齊煒,胡進(jìn).煤的基氏流動(dòng)度測定標準及測定儀研究[J].煤質(zhì)技術(shù),2011,17(6):73-76.度變差,這可能是由于1/3焦煤A中膠質(zhì)體較好[6] 張晨,張晞. 煙煤奧阿膨脹度測定儀的設計與實(shí)現表4配煤方案(w%/%)[J].煤炭工程,2009(1): 99-100.Table 4 Scheme of coal blending方案1/3焦煤A_ 肥煤B其他1/3焦煤焦煤瘦煤[7]張雪紅,薛改風(fēng),項茹 ,等.1/3焦煤工藝指標比較研究[C]//中國可再生能源科技發(fā)展大會(huì )論文集. Sci-1#18232i710entific Research Publishing ,2010:2879-2883.[8]周師庸,趙俊國.煉焦煤性質(zhì)與高爐焦炭質(zhì)量[M].北京:冶金工業(yè)出版社,2005:90.表5焦炭質(zhì)量分析數據Table 5 Quality analysis of coke%[9]劉尚超,陳鵬,項茹，等.焦炭熱性能影響因素分析[J].煤炭科學(xué)技術(shù),2008,36(5):104-108.方案MsM1oCRISS192.57.425.6 54.84.4[10]劉建星.對不同取樣點(diǎn)焦炭的機械強度及篩分組成91.28.825.456. 584. 6的探討[J].湖南冶金,2005,33(6):17-19.91.09.025.357.84.2中國煤化工MHCNMH G2013年第3期張雪紅,等:1/3焦煤和肥煤參與配煤煉焦的比較213Comparison of 1/3 coking coal and fat coal in blending and cokingZhang Xuehong'，Xue Gaifeng', Liu Rui", Li Xiaoyuan2(1. Research and Development Center, Wuhan Iron and Steel Corporation, Wuhan 430080, China;2. Wuhan Pingmei WISCO Joint Coking Company Limited, Wuhan 430082, China)Abstract: Quality analysis was carried out of 1/3 coking coal and fat coal and comparison was made oftheir respective coke optical texture, coke strength and influence over coke performance after coalblending. The results show that, when the quality of fat coal is average or a lttle inferior, its actionin coal blending equals that of 1/3 coking coal of good quality and the two coals can be interchanged,yet different blending ratios are needed for different cold strengths and hot strengths of coke thatmight be needed.Key words:1/3 coking coal; fat coal; coal blending and coking; cold strength; hot strength[責任編輯鄭 淑芳](上接第205頁(yè))Effect of fluoride on the properties and structure ofpitch coke from coal-tar pitchHui Dalu, Xu Bin, Tian Niu, Huang Yan, Chen Yongjun(College of Chemical Engineering and Technology，w uhan University of Science andTechnology, W uhan 430081, China)Abstract: With coal-tar pitch as the raw material, binder pitch was modified by adding different con-tents of fluoride. With TG, CO2 reactivity, XRD and SEM, modified pitch coke were characterized.The results show that fluoride has effectively improved the microstructure of pitch coke and causedmodified pitch coke denser in texture. The addition of fluoride has changed to a certain degree the oxi-dation behavior of modified pitch coke and evidently raised the coke' s oxidation resistance. Comparedwith unmodified pitch coke, the CO2 reactivity of fluoride modified pitch coke has been reduced by47%~74%.Key words:coal-tar pitch; pitch coke; fluoride; modification; oxidation resistance[責任編輯徐前 進(jìn)]中國煤化工MYHCNMH G