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本发明提供一种处理含钛物料（例如钛铁矿）的还原——氯化法。含钛物料氯化时,钛被选择氯化;而物料中的铁转变为氯化物的数量则为数不多。物料中其他一些金属,例如钒,则可能与钛一起被氯化。使用适量的含碳物料作为还原剂,其用量依含钛物料中的含氧量而定;至少 应是使含钛物料中的氧转化为一氧化碳所需要的化学计算量。选择氯化所用的氯化剂可以只用二氯化铁（FeCl_2）,或二氯化铁与一种或几种其他含氯物质结合使用;特别是与分子氯（Cl_2）和氯化氢（HCl）结合使用。选择氯化时,用三氯化铁（FeCl_3）作为氯化剂或充当一部分氯化剂,就相当于使用FeCl_2/0.5Cl_2的混合物。氯化剂最好能提供足够的氯原子,以便与含钛物料中几乎所有的钛反应。氯化过程中,温度应保持在950～1400℃,但这个温度范围取决于氯化剂的成分。在这个温度范围内,可以有一个最低温度,但必须保持其选择性。
The present invention provides a reduction-chlorination process for the treatment of titanium-containing materials such as ilmenite. Titanium is chlorinated when the titanium-containing material is chlorinated, and the amount of iron converted to chloride in the material is small. Some other metals in the material, such as vanadium, may be chlorinated with titanium. The appropriate amount of carbonaceous material is used as the reductant, the amount of which is dependent on the oxygen content of the titanium-containing material; at least the stoichiometric amount required to convert oxygen from the titanium-containing material to carbon monoxide. The chlorinating agent used for the chlorination process may be used alone with ferric chloride (FeCl 2) or ferric chloride in combination with one or more other chlorine-containing substances, particularly with molecular chlorine (Cl 2) and hydrogen chloride (HCl) In conjunction with. The choice of chlorination, with ferric chloride (FeCl_3) as the chlorination agent or as a part of the chlorination agent, is equivalent to the use of a mixture of FeCl_2 / 0.5Cl_2. The chlorinating agent desirably provides sufficient chlorine atoms to react with almost all titanium in the titanium-containing material. During chlorination, the temperature should be maintained at 950 to 1400 ° C, but this temperature range depends on the composition of the chlorination agent. In this temperature range, there can be a minimum temperature, but must maintain its selectivity.