【摘要】 采用金竹山煤矿煤矸石研制橡胶填料。采用沉降分离法可去除以石英为主的大部分杂质。漂白提纯的优化参数为:浆浓度为40%,硫酸浓度为20%,在95℃反应1.5h,漂洗至pH≥5。酸浸后,浆浓度为40%,往每吨土中加次氯酸钠12L,在50℃条件下反应4h;每吨土中加入双氧水12L,在50℃条件下反应2h;按5‰比例加入保险粉,pH=3,在45℃反应1h后漂洗,然后烘干。超细粉磨至粒度小于4.6μm。将超细粉体置于马弗炉中,于850℃煅烧3h,产品白度达到76,能满足填料要求。应用试验结果表明,粉体在EPDM橡胶中达到半补强炭黑的充填效果。更多还原

【Abstract】 The rubbers filler was produced with the coal gangue in Jinzhushan coal mine. The most of impurities mainly quartz can be separated from the powder by the method of precipitation separation. The optimum bleaching parameters are as follows. First, the value of pH isnt below 5 after the reaction lasts 1.5 h under the conditions of the pulp density 40%, and sulphuric acid concentration 20% at 95 ℃. Second, the reaction lasts 4 h under the conditions of pulp density 40% and adding sodium hypochlorite 12 L per ton of powder at 50 ℃. Third, the reaction lasts 2 h under the conditions of adding oxydol 12 L per ton of powder 50 ℃. Finally, the reaction lasts 1 h under the conditions of vat powder 5‰, pH=3, at 45 ℃. It is bleached clean and dried. Then the powder is grinded to less than 4.6 μm ,and is calcined for 3 h in the muffle furnace at 850 ℃. The powders whiteness is 76 and it can be used as filler. Application shows that the reinforcing effect of the powders is similar to that of semi-reinforcing carbon black as rubbers filler in EPDM.更多还原