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全氯乙烯 (PCE)是一种稳定、不可燃的非极性有机溶剂。通过煤油调节其密度可以实现对煤泥的分选。文章通过对石台、七台河— 0 .5 mm煤泥的实验研究表明 :PCE分选煤泥 ,不仅可以直接对分选后的溶剂进行回收 ,省去了煤泥水处理的过程 ,而且分选效果优于浮选。对石台煤样分别进行了— 0 .5 mm、— 0 .2 5 mm、0 .2 5～ 0 .0 74mm及— 0 .0 74mm四个级别的分选实验。结果表明 :分选 0 .2 5～ 0 .0 74mm煤泥精煤产率在 74.88%时 ,灰分为 1 2 .44 % ,此时尾煤灰分为47.95 %。而同水平的浮选精煤 ,产率为 72 .1 3 % ;对七台河煤样分别进行了— 0 .2 5 mm、0 .2 5～0 .0 74mm和— 0 .0 74mm三个级别的实验研究。结果表明 :分选 0 .2 5～ 0 .0 74mm煤泥精煤产率在80 .2 4%时 ,灰分为 6.68% ,尾煤灰分为 3 9.1 6% ,精煤产率比同水平的浮选实验精煤产率高 1 .82 %。对影响分选的各因素作了探讨 ,表明分选密度是主要影响因素 ,其它如溶剂与煤的比率、分选时间等对分选效果也略有影响。通过初步实验研究 ,表明全氯乙烯用于煤泥的分选将会为我国煤泥处理开辟一条新的途径 ,值得进一步研究 ,特别是对于高温下脱硫工作的研究。
Perchlorethylene (PCE) is a stable, non-flammable non-polar organic solvent. Through the kerosene to adjust its density can be achieved on the slime sorting. The article through Shitai, Qitaihe - 0 .5 mm slime experiments show that: PCE slime separation, not only directly after the separation of the solvent recovery, eliminating the slime water treatment process, and points Election effect is better than flotation. The coal samples from Shitai were separately tested in four different levels of 0 .5 mm, -0.25 mm, 0 .25-0.0474 mm and -0.074 mm. The results showed that the ash content was 122.4% when the yield of pure coal slime from 0. 25 ~ 0. 0 74mm was 74.88%, and the percentage of tailings ash was 47.95%. While the same level of flotation of clean coal, the yield was 72.133%; Qitaihe coal samples were carried out - 0.25mm, 0.52-0.0474mm and -0.074mm A level of experimental research. The results showed that when the yield of pure coal slime from 0.250-0.74 mm was 80.24%, the ash content was 6.68% and the tail coal ash content was 3. 9.16%. The yield of refined coal was higher than that of the same level Flotation experiment yield of refined coal 1.82%. The factors affecting the sorting were discussed, indicating that the sorting density is the main influencing factor. Others such as the ratio of solvent to coal and sorting time also have a slight impact on the sorting effect. Preliminary experimental study shows that the use of perchlorethylene for slime separation will open up a new way for slime treatment in our country and deserves further study, especially for the study of desulfurization at high temperature.