新疆地区低阶煤污水制浆及成浆特性

Properties of Coal Water Slurry Prepared with Low-rank Coal and Oil-field Sewage from Xinjiang

采用4种水样(含采油污水)对新疆地区3种低阶煤展开成浆特性、浆体流变特性及稳定性实验研究.结果表明:乌苏红山煤、乌苏四棵树煤和徐矿4煤的成浆质量分数分别可达66.5%,61.0%和53.4%.在污水制浆中,以含油量较高的重力除油入口水较合适,可促进成浆,相比重力除油出口水制浆,乌苏红山煤和乌苏四棵树煤浆体表观黏度分别可降低30.3%和66.8%,徐矿4煤成浆质量分数提升1.1%;重力除油入口水还可提高浆体热值,简化污水处理.3种煤浆稳定性差异较大,其中乌苏四棵树煤浆稳定性最好;影响浆体稳定性的主要是煤质和添加剂,水样对煤浆稳定性的影响较小.

The properties of coal water slurry （CWS） prepared by low-rank coal and oil- field sewage were investigated. The results show that the maximal CWS mass fraction for each coal follows： Wusuhongshan coal （66. 5%）〉Wususikeshu coal （61. 0%）〉 Xukuang 4 coal （53.4%）. Compared with the CWS prepared by oil-free sewage, the CWS prepared by oil-bearing sewage for each coal have lower viscosity, which decrease by 30.3% and 66.8% for Wusuhong- shan coal and Wususikeshu coal respectively, and have larger mass fraction, which increase by 1.1% for Xukuang 4 coal. It indicates that the use of oil-bearing can promote the mass fraction and calorific value of CWS, as well as simplifying the treatment of oil-field sewage. Among three kinds of CWS, the Wusuhongshan CWS has the largest stability due to its high ash content. The stability of CWS is largely affected by coal type and additive, while the type of water or sewage shows little effect.