Titanium Production via Titanium Sulfide
Titanium Production via Titanium Sulfide
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通过硫化钛生产钛
DOI：
10.1051/matecconf/202032107003
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发表时间：
2020
影响因子：
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通讯作者：
Kikuchi T.
中科院分区：
文献类型：
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作者：
Suzuki R. O.;Yashima Y.;Suzuki N.;Ahmadi E.;Natsui S.;Kikuchi T.
提出了一种钛铁矿硫化冶金新工艺，并通过实验验证：该工艺包括几个阶段：（1）钛铁矿石暴露于气态CS2中，选择性硫化为FeS，然后用湿化学法除去FeS。2)剩余的氧化物再次暴露于CS2以形成TiS 2。3)采用熔融CaCl 2-CaS电化学还原法将TiS 2还原为金属Ti，在1173 K下将TiFeO 3暴露于Ar-CS2混合气流中，形成FeS+ TiO 2混合物。在313 K的H2SO 4溶液中，FeS易于分离。回收TiO 2后，再用CS2进行二次硫化，使其完全转化为TiS 2。在CaS-CaCl_2熔体中，在1173 K和3.0 V下，通过钙热还原和同时电解约6 h，可将TiS_2还原为Ti粉。由于S在a-Ti中的溶解度很小，杂质降低到0.021 mass%。然而，1.06质量%的O仍然是因为广泛的溶解度的氧在a-Ti和水污染的初始CaCl 2。
A new metallurgical process via titanium sulfide from ilmenite is proposed and experimentally approved: It consists of several stages; 1) The ilmenite ore is exposed to gaseous CS2to selectively sulfurize to FeS, which is wet-chemically removed. 2) The residual oxide is again exposed to CS2to form TiS2. 3) TiS2is electrochemically reduced to metallic Ti using molten CaCl2-CaS as an application of OS process.TiFeO3was exposed to Ar-CS2mixed gas flow at 1173 K to form the mixture of FeS+TiO2. FeS was easily separated by immersing in H2SO4solution at 313 K. After recovery of TiO2, it was converted completely to TiS2by the second sulfurization with CS2. TiS2could be reduced to Ti powder by calciothermic reduction and simulteneous electrolysis in a CaS-CaCl2melt for about 6 hours at 1173 K and 3.0 V. The impurity decreased to a low level such as 0.021 mass%S due to very small solubility of S in a-Ti. However, 1.06 mass%O remained because of wide solubility of oxygen in a-Ti and water contamination in initial CaCl2.