本文選題：浮選 + 輪胎熱解油��； 參考：《太原理工大學(xué)》2015年碩士論文

【摘要】：浮選是煤炭洗選過程中重要的環(huán)節(jié)之一，它可以有效地分選0.5mm以下的細(xì)粒煤泥。隨著優(yōu)質(zhì)煤種不斷被開采，采煤工藝的不斷發(fā)展，導(dǎo)致了煤質(zhì)變差和采礦過程中形成了大量煤泥。浮選在當(dāng)前成為提高選煤廠工作效率和經(jīng)濟(jì)效益的愈來愈重要的工藝環(huán)節(jié)。在浮選過程中，添加的捕收劑將直接影響生產(chǎn)過程中的各指標(biāo)。研發(fā)新型高效的捕收劑成為提高浮選效率的重要手段之一。 本文通過研究輪胎熱解油的捕收性，將其作為浮選捕收劑。并利用乳化技術(shù)，將其配置成為輪胎熱解油乳狀液。將乳狀液作為捕收劑分別對三種不同煤泥進(jìn)行了浮選試驗(yàn)，與不同捕收劑進(jìn)行對比捕收性能，并對其浮選條件作出了優(yōu)化。最后，對乳狀液作用前后的煤樣，進(jìn)行了接觸角、潤濕熱和紅外光譜分析，探究其作用方式。主要做了以下工作： 1.利用輪胎熱解油作為捕收劑對三種不同煤樣進(jìn)行了實(shí)驗(yàn)室單元浮選試驗(yàn)，并與煤油作捕收劑浮選同種煤泥的實(shí)驗(yàn)結(jié)果進(jìn)行了對比。試驗(yàn)證明，輪胎熱解油具備了作為煤用捕收劑的條件。 2.選擇了Span-80、OP-10和Tween-20三種乳化劑用于乳化輪胎熱解油。配制出穩(wěn)定的水包油型乳狀液。并進(jìn)行了浮選試驗(yàn)，浮選實(shí)驗(yàn)結(jié)果表明，輪胎熱解油乳狀液具備了較強(qiáng)的捕收性，可以有效的降低藥劑用量，提高精煤產(chǎn)率。 3.將配制的乳狀液作捕收劑的浮選結(jié)果與7131型新型高效捕收劑浮選結(jié)果進(jìn)行了比較。當(dāng)用量較高時(shí)，輪胎熱解油乳狀液的浮選效果好于同用量的7131型捕收劑的效果。 4.改變浮選條件，在三種礦漿濃度（60g/L、80g/L、100g/L）和不同起泡劑用量（60g/t、80g/t、100g/t、120g/t、150g/t）的條件下分別進(jìn)研究了礦漿濃度和起泡劑用量對輪胎熱解油乳狀液的浮選效果的影響。80g/L的礦漿濃度浮選效果最好。起泡劑用量為80g/t-100g/t時(shí)，效果最好。 5.通過對藥劑煤樣處理前后接觸角的測定，輪胎熱解油乳狀液處理后的煤樣接觸角改變大于煤油處理煤樣后的接觸角，輪胎熱解油處理后的煤樣表面上潤濕性由親水轉(zhuǎn)向了疏水。說明，輪胎熱解油乳狀液對煤樣表面潤濕性有較大改變。 6.測試煤油和輪胎熱解油乳狀液分別潤濕煤樣時(shí)的潤濕熱，輪胎熱解油乳狀液潤濕煤樣時(shí)的潤濕熱遠(yuǎn)大于煤油潤濕煤樣時(shí)的潤濕熱，說明，輪胎熱解油乳狀液更容易在煤粒表面吸附。 7.通過紅外分析煤樣處理前后的紅外光譜。輪胎熱解油乳狀液在吸附煤粒表面時(shí)，，均為物理吸附。
[Abstract]:Flotation is one of the most important links in the process of coal washing. It can effectively separate fine coal slime below 0.5mm. With the continuous exploitation of high quality coal and the continuous development of coal mining technology, the quality of coal has become worse and a large amount of slime has been formed in the process of mining. Flotation has become a more and more important process to improve the efficiency and economic benefit of coal preparation plant. In the flotation process, the addition of collector will directly affect the production process of each index. Research and development of new and efficient collector has become one of the important means to improve flotation efficiency. In this paper, tire pyrolytic oil is used as flotation collector. And the emulsification technology was used to configure it into a tyre pyrolytic oil emulsion. Three different kinds of coal slime were tested by using emulsion as collector, and compared with different collector, and the flotation conditions were optimized. Finally, the contact angle, moist heat and infrared spectrum of the coal samples before and after the emulsion action were analyzed. The main tasks are as follows: 1. The laboratory unit flotation tests of three different coal samples were carried out using tyre pyrolysis oil as collector, and the results were compared with those of kerosene as collector. The test shows that the pyrolytic oil of tire has the condition to be used as collector for coal. 2. Three emulsifiers, Span-80 OP-10 and Tween-20, were selected for emulsified tire pyrolysis oil. A stable oil-in-water emulsion was prepared. The flotation experiment results show that the pyrolytic oil emulsion of tire has strong collecting ability, which can effectively reduce the dosage of reagent and increase the yield of clean coal. 3. The flotation results of emulsion as collector were compared with those of new type 7131 high efficiency collector. When the dosage is high, the flotation effect of tyre pyrolytic oil emulsion is better than that of 7131 type collector with the same dosage. 4. By changing the flotation conditions, the effects of pulp concentration and the amount of foaming agent on the flotation of tyre pyrolytic oil emulsion were studied under the conditions of 60g / L ~ 80g 路L ~ (-1) / L ~ (100 g / L) and 60 g / t ~ (-1) / t ~ (-1) ~ (100) g / t ~ (-1) of different foaming agents, respectively, and the effects of pulp concentration and the amount of foaming agent on the flotation effect of tyre pyrolytic oil emulsion were studied. When the amount of foaming agent is 80g/t-100g/t, the effect is the best. 5. Through the measurement of contact angle before and after treatment, the contact angle of coal sample treated with pyrolytic oil emulsion was larger than that of coal sample treated with kerosene, and the wettability of coal sample treated with pyrolytic oil changed from hydrophilic to hydrophobic. The results show that the wettability of pyrolytic oil emulsion on coal surface is changed greatly. 6. The wetting heat of kerosene and tyre pyrolytic oil emulsion is much higher than that of kerosene emulsion, which shows that the wetting heat of coal sample is much higher than that of kerosene emulsion sample. Tyre pyrolytic oil emulsion is easier to adsorb on the surface of coal particles. 7. The infrared spectra of coal samples before and after treatment were analyzed by IR. Tyre pyrolytic oil emulsion is physically adsorbed on the surface of coal particles.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD923.13;TD94

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