本文選題：鱗片石墨 + 磨礦　； 參考：《武漢理工大學》2015年碩士論文

【摘要】：我國大鱗片石墨資源相對匱乏,石墨產(chǎn)品中以鱗片石墨用途最為廣泛,需求量最大,且其價值與鱗片尺寸和品位成正比。但鱗片石墨傳統(tǒng)磨浮工藝普遍對石墨鱗片破壞較大,因此針對不同嵌布粒度的鱗片石墨礦石,合理選擇再磨工藝具有重大意義。鱗片石墨由于嵌布粒度不同其浮選性質(zhì)也有所差異,針對甘肅民勤鱗片石墨礦(1#礦)和黑龍江蘿北鱗片石墨礦(2#礦)兩種不同嵌布粒度的鱗片石墨礦石分別進行了礦石性質(zhì)、粗選條件、開路試驗及浮選速率研究,得出以下結論:礦石性質(zhì)研究表明,1#礦和2#礦固定碳含量分別為4.45%、9.29%,1#礦石脈石礦物以石英為主,其次為長石類、云母類、透閃石、綠泥石等;2#礦石脈石礦物中石英和透輝石含量較高,其次為長石類、云母類、透閃石、方解石,還含有少量黃鐵礦等。1#礦石墨嵌布粒度較細,+0.15mm粒級的石墨顆粒數(shù)累計比為3.1%,粒徑在-0.052mm以下的顆粒較多,累計比為58.65%。;2#礦石墨嵌布粒度較粗,+0.15mm粒級石墨顆粒數(shù)累計比為10%。粗選條件試驗表明,1#礦較優(yōu)的粗選磨礦細度為-0.074mm66.68%,煤油用量為400g/t,2#油用量為60g/t,浮選濃度20%,礦漿pH值為8.5;2#礦較優(yōu)的粗選磨礦細度為-0.074mm45.11%,煤油用量為348g/t,2#油用量為66g/t,浮選濃度20%,礦漿pH值為8.5。開路試驗表明,1#和2#礦經(jīng)四次再磨五次精選球磨開路流程,可分別獲得固定碳含量為96.13%、96.49%的石墨精礦;1#和2#礦分別經(jīng)五次再磨六次精選棒磨和四次再磨五次精選棒磨開路流程,分別獲得固定碳含量為95.77%、96.01%的石墨精礦。1#礦球磨和棒磨開路流程精礦中+0.15mm粒級產(chǎn)率均不足3%,棒磨略高于球磨,但棒磨磨礦效率遠低于球磨;2#礦球磨和棒磨開路流程精礦中+0.15mm粒級石墨含量分別為9.56%、11.38%,棒磨可對石墨鱗片起到較好的保護作用。浮選速率試驗表明,2#礦的浮選速率常數(shù)較1#礦高,均隨煤油、2#油用量的增加而逐漸升高,隨浮選濃度的增加而降低,過高或過低的礦漿pH值均會導致浮選速率降低。可通過控制刮泡時間,適量增加煤油用量,降低2#油用量以及浮選濃度達到提前回收部分石墨鱗片的目的。
[Abstract]:The resources of large flake graphite in China are relatively scarce. Among the graphite products, flake graphite is the most widely used and the demand is the greatest, and its value is proportional to the size and grade of the scale. However, the traditional floatation process of flake graphite has great damage to the graphite flake, so it is of great significance to choose the reasonable regrinding process for the flake graphite ore with different size. The floatation properties of flake graphite are also different because of the different size of sheet graphite. The mineral properties of flake graphite ore with different size distribution are studied, aiming at the scale graphite ore of Minqin, Gansu province) and the scale graphite ore of Luobei, Heilongjiang province. The results show that the fixed carbon content of the ore is 4.45 ~ 9.29 ~ (th) ~ (th), followed by quartz, feldspar, mica, tremolite, etc. The contents of quartz and diopside in gangue minerals of chlorite etc. ore are relatively high, followed by feldspar, mica, tremolite, calcite, etc. There is also a small amount of pyrite ore, such as pyrite ore. The size of ink-inlaid cloth is fine, the cumulative ratio of graphite particles of 0.15mm grain-grade is 3.1, the particle size of which is less than -0.052mm, the accumulative ratio is 58.65.b.2#, and the accumulative ratio of 0.15mm grain-grade graphite particles is 10. The results of roughing test show that the optimum grinding fineness is -0.074 mm 66.68, the amount of kerosene is 400 g / tni2# oil is 60 g / t, the flotation concentration is 20, the pulp pH is -0.074 mm 45.11, the amount of kerosene is 348 g / t, the floatation concentration is 20, the pulp pH is 8.5m.The crude grinding fineness is -0.074 mm 45.11, the amount of kerosene is -0.074 mm / t, the flotation concentration is 20 g / t, the pulp pH value is 8.5% 路m ~ (-1), the crude grinding fineness is -0.074 mm ~ (-) 66.68 mm, the flotation concentration is 20 g / t, the pulp pH value is 8.5%. The open circuit test shows that the open circuit flow of graphite concentrate with a fixed carbon content of 96.13% and 96.49% can be obtained by four times regrinding and five times of ball milling, respectively, and the open-circuit process of graphite concentrate with fixed carbon content of 96.13% and 96.49% can be obtained by five times regrinding and five times regrinding respectively. Graphite concentrate with 95.7777% and 96.01% of fixed carbon were obtained from ball mill and rod mill open circuit process respectively. The yield of 0.15mm particles in the concentrate was less than 3%, and the rod mill was slightly higher than that of ball mill. However, the efficiency of rod mill is much lower than that of ball mill and rod mill. The content of 0.15mm grain-grade graphite in the concentrate of ball mill and rod mill is 9.56 ~ 11.38, respectively. The flotation rate test shows that the flotation rate constant of the ore is higher than that of the 1# mine, and the flotation rate increases gradually with the increase of kerosene oil content, and decreases with the increase of flotation concentration. Too high or too low pH value of slurry will lead to the decrease of flotation rate. By controlling the blowing time, increasing the amount of kerosene in proper amount, reducing the amount of oil in 2# and the concentration of floatation, some graphite flakes can be recovered in advance.
【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD97;TD923

【參考文獻】

相關期刊論文 前10條

1 傳秀云;;石墨資源狀況和產(chǎn)業(yè)發(fā)展前景[J];高科技與產(chǎn)業(yè)化;2014年02期

2 龍淵;張國旺;李自強;肖驍;;保護石墨大鱗片的工藝研究進展[J];中國非金屬礦工業(yè)導刊;2013年02期

3 肖偉麗;;某石墨礦提高精礦大片產(chǎn)率及品位的浮選工藝研究[J];硅谷;2012年08期

4 張凌燕;張丹萍;邱楊率;潘力;于鴻賓;;朝鮮某地細粒級石墨礦選礦試驗研究[J];礦產(chǎn)綜合利用;2012年02期

5 孫剛;劉煥勝;;浮選動力學的研究現(xiàn)狀及其進展[J];煤炭加工與綜合利用;2011年06期

6 尹麗文;;世界石墨資源開發(fā)利用現(xiàn)狀[J];國土資源情報;2011年06期

7 岳成林;;鱗片石墨大片損失規(guī)律及磨浮新工藝研究[J];中國礦業(yè);2007年10期

8 謝朝學;保護大鱗片石墨選礦的研究[J];中國非金屬礦工業(yè)導刊;2005年01期

9 陳云,馮其明,張國范,陳遠道,盧毅屏,歐樂明;微細鱗片石墨分散性[J];中南大學學報(自然科學版);2004年06期

10 劉渝燕,劉建國,魏健;某晶質(zhì)石墨礦提高精礦大片產(chǎn)率及品位的選礦工藝研究[J];非金屬礦;2003年01期

相關博士學位論文 前1條

1 李哲;鱗片石墨浮選特性及工藝研究[D];中國礦業(yè)大學（北京）;2010年

相關碩士學位論文 前2條

1 范兆琳;浮選指標數(shù)學模型的研究[D];中南大學;2013年

2 楊香風;石墨選礦及晶體保護試驗研究[D];武漢理工大學;2010年

，

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