The orthogonal test design method was applied to study the initial temperature, heat holding time and final temperature affected to oil yield rate of the waste tyre pyrolysis. The variance analysis showed that the initial temperature and heat holding time would not have obvious influence to the oil yield rate of the pyrolysis and the final temperature of the pyrolysis would have obvious influence to the oil yield rate. When the initial temperature was 400 ℃, the heat holding time was 30 min and the final temperature was 700 ℃, the oil yield rate would be high and could be 45.5％. The Fourier Transform Infrared spectroscopy (FT-IR) analysis showed that the pyrolysis oil would be rich in aromatic hydrocarbon, olefin, hydrocarbon of methane series and polar material. A slime floatation experiment with the pyrolysis oil from the waste tyre as the slime collector was conducted in Dongpang Coal Preparation Plant. When the collector dosage was 1 295 g/t and the GF oil dosage was 76 g/t, the ash content of the clean coal would be 9. 30％, the clean coal production rate would be 80. 83％,the recovery rate of the combustible mass would be 91.34％ and the perfect index of the floatation would be 53.26％. The results showed that the pyrolysis oil from the waste tyre would have a high collection performance, would have certain bubble performance and could obviously reduce the frothering agent dosage.%采用正交试验设计方法研究了起始温度、保温时间、最终温度对废轮胎热解油产率的影响.方差分析表明起始温度、保温时间对热解油产率的影响不显著,热解最终温度对其影响显著,在起始温度为400℃,保温时间为30 min,最终温度为700℃时,油产率最高,达45.50%.傅里叶变换红外光谱(FT-IR)分析表明:热解油中富含芳烃、烯烃、烷烃和极性物.以废轮胎热解油作为煤泥捕收剂对东庞选煤厂煤泥进行浮选试验,当捕收剂用量为1 295 g/t,GF油用量为76 g/t时,精煤灰分为9.30%,精煤产率为80.83%,可燃体回收率为91.34%,浮选完善指标为53.26%.结果表明:废轮胎热解油具有较强的捕收性能,同时还有一定的起泡性能,其在浮选过程中的加入可明显减少起泡剂的用量.
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