By means of energy-dispersive X-ray spectroscopy (EDX) and scanning electron microscope (SEM) analysis, the phase structure characteristics of high titanium slag were analyzed. Through the single factor and the orthog...By means of energy-dispersive X-ray spectroscopy (EDX) and scanning electron microscope (SEM) analysis, the phase structure characteristics of high titanium slag were analyzed. Through the single factor and the orthogonal experiment methods, the effects of material particle size, mass ratio of acid to ore, roasting temperature, and roasting time on the acidolysis ratio of TiO<sub>2</sub> during the process of roasting high titanium slag with concentrated sulfuric acid were systematically investigated. The results show that the sequence of each factor affecting the acidolysis ratio of TiO<sub>2</sub> is: mass ratio of acid to ore, roasting time, and roasting temperature. The optimum technological conditions are obtained as mass ratio of acid to ore of 2.1, roasting temperature of 310°C, roasting time of 75min, and material particle size of 45–53μm. The acidolysis ratio of TiO<sub>2</sub> is over 96% under the optimum conditions. The roasting process is proved to be significant in the exploitation and utilization of high titanium slag. The advantages of the proposed roasting process are of high efficiency, low power consumption, and minimum pollution.展开更多
高钛渣中各元素分析一般采用化学法分析[1],操作繁琐、流程长、效率低、并且使用大量酸碱等危险化学试剂,本方法采用熔片制样,消除高钛渣中钛的矿物结构效应,降低基体效应的影响,研究熔样条件,确定仪器测量的最佳参数为Axions型X射线荧...高钛渣中各元素分析一般采用化学法分析[1],操作繁琐、流程长、效率低、并且使用大量酸碱等危险化学试剂,本方法采用熔片制样,消除高钛渣中钛的矿物结构效应,降低基体效应的影响,研究熔样条件,确定仪器测量的最佳参数为Axions型X射线荧光光谱仪(荷兰帕纳科公司),最大功率4.0 KW,最大电压60KV,最大电流125 m A,超尖锐耙X光管。由于高钛渣国家标准样品中定值的元素少,为了增加高钛渣标样中可测定元素,以人工合成配置一系列具有一定梯度含量的人工标准样品,用理论α系数及干扰曲线法进行基体效应和谱线重叠干扰的校正,开发了用X射线荧光光谱测定高钛渣中除Ti外的常量和微量元素的方法。用该方法测定结果与化学值相符。10次制样测量,各元素的RSD≤1.00%。用X射线荧光光谱法快速测定高钛渣(Ti O_245%~95%)中主次量元素的分析方法。其中分析精密度都低于1%,熔片的重现性好,本方法对高钛渣国家标准物质进行检测与标准值基本相符,完全能够满足选冶流程样品的分析要求。该方法简便、快速、成本低、效率高。减少了分析化学样品时,使用的有毒试剂对环境的污染。展开更多
文摘开展了微波高温焙烧高钛渣连续实验.对微波高温双螺旋设备内物料的运行情况进行冷态探索,研究了物料运行与转轴转向、出料量与转轴转速及物料流速与转轴转速的关系,并根据冷态试验所得参数进行了热态连续实验.实验结果表明:所进行的冷态探索是正确的,对热态连续实验具有很大的指导价值.当进料速度为1.867kg/min,转轴转动周期参数为:18Hz,正转34s-停3s-反转11 s-停3 s时,微波高温双螺旋设备能够达到最佳运转状态.所制备得到的人造金红石符合电焊条涂料的验收标准,硫含量降低到0.02%左右.人造金红石的年产量也可达到240 t.
基金financially supported by the National Natural Science Foundation of China(Nos.61372195 and61304069)the National Basic Research Program of China(No.2007CB613603)
文摘By means of energy-dispersive X-ray spectroscopy (EDX) and scanning electron microscope (SEM) analysis, the phase structure characteristics of high titanium slag were analyzed. Through the single factor and the orthogonal experiment methods, the effects of material particle size, mass ratio of acid to ore, roasting temperature, and roasting time on the acidolysis ratio of TiO<sub>2</sub> during the process of roasting high titanium slag with concentrated sulfuric acid were systematically investigated. The results show that the sequence of each factor affecting the acidolysis ratio of TiO<sub>2</sub> is: mass ratio of acid to ore, roasting time, and roasting temperature. The optimum technological conditions are obtained as mass ratio of acid to ore of 2.1, roasting temperature of 310°C, roasting time of 75min, and material particle size of 45–53μm. The acidolysis ratio of TiO<sub>2</sub> is over 96% under the optimum conditions. The roasting process is proved to be significant in the exploitation and utilization of high titanium slag. The advantages of the proposed roasting process are of high efficiency, low power consumption, and minimum pollution.
文摘高钛渣中各元素分析一般采用化学法分析[1],操作繁琐、流程长、效率低、并且使用大量酸碱等危险化学试剂,本方法采用熔片制样,消除高钛渣中钛的矿物结构效应,降低基体效应的影响,研究熔样条件,确定仪器测量的最佳参数为Axions型X射线荧光光谱仪(荷兰帕纳科公司),最大功率4.0 KW,最大电压60KV,最大电流125 m A,超尖锐耙X光管。由于高钛渣国家标准样品中定值的元素少,为了增加高钛渣标样中可测定元素,以人工合成配置一系列具有一定梯度含量的人工标准样品,用理论α系数及干扰曲线法进行基体效应和谱线重叠干扰的校正,开发了用X射线荧光光谱测定高钛渣中除Ti外的常量和微量元素的方法。用该方法测定结果与化学值相符。10次制样测量,各元素的RSD≤1.00%。用X射线荧光光谱法快速测定高钛渣(Ti O_245%~95%)中主次量元素的分析方法。其中分析精密度都低于1%,熔片的重现性好,本方法对高钛渣国家标准物质进行检测与标准值基本相符,完全能够满足选冶流程样品的分析要求。该方法简便、快速、成本低、效率高。减少了分析化学样品时,使用的有毒试剂对环境的污染。
