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-shaking table-magnetic separation" can reduce the Cr2O3 grade of laterite nickel ore from 2.24% to 1.27%, and the removal rate of chromite reaches 43.30% calculated by chromium trioxide, which......
by decabromodiphenylethane (DBDPE) and antimony trioxide (Sb2O3) were studied by cone calorimeter and thermogravimetry (TG). The results show that ABS/DBDPE/Sb2O3 has the similar flammability parameters......
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测定铬铁矿中氧化亚铁的溶样方法研究李玉茹1,周海波1,吴爱华1,杨林1,张志勇1,黄宝贵1(1.湖南省长沙市长沙矿冶研究院)摘 要:证明了经沸腾硫酸(~330℃)湿烧法预处理的铬铁矿的物质组成发生相变,反应产物硫酸铬生成,化学活性增强以及磷酸(硫-磷混合酸)对其溶解反应明显变易等,从而改进了测定铬铁矿中氧化亚铁的溶样方法.试样首先与钒(Ⅴ)-钒(Ⅳ)溶液和硫酸混合,于2 000 W电炉上加热至冒浓三氧化硫烟,并至腾空1~3 min,然后加入缩合磷酸,再加热至冒浓烟,并至腾空3~5 min.所得试液适当冷却,稀释......
requires that its primary source as molybdenite (MoS2) first be transformed to obtain products commonly used to fabricate salts, such as molybdenum salts, and to ferrous molybdenum and molybdenum trioxide... species. Thus, the resulting calcine contains molybdenum trioxide as well as other oxides and impurities such as copper and iron oxides. For this reason, molybdenum trioxide must be treated......
to its toxicity and potential health threat [5-7]. In copper smelting system, 60% of arsenic is oxidized to vapor phase of arsenic trioxide (As2O3(g)), creating arsenic-containing flue gas [8]. The collection of arsenic trioxide in the smelting flue is the key to the directional control of arsenic [9]. The most commonly used means is to set quench tower after heat recovery steam......
of the molybdenum industry for the production of technical grade molybdenum trioxide, which is further used to produce molybdenum dioxide [3], molybdenum, ferromolybdenum alloy and other pure molybdenum compounds, such as ammonium paramolybdate, sodium and calcium molybdate. The oxidation roasting of molybdenite concentrate is necessary to generate molybdenum trioxide. At present, the oxidation roasting......