Recovery and Utilization of Low Boilers in Titanium Tetrachloride Production
A low boiling point, titanium tetrachloride technology, applied in the direction of titanium halide, silicon oxide, silicon dioxide, etc., can solve the problems of affecting the health of workers, corrosion of field equipment, waste of TiCl, etc., and achieve obvious economic and social benefits. , to avoid corrosion, the effect of less equipment
Inactive Publication Date: 2015-08-05
PANZHIHUA STEEL ENTERPRISES XINYU CHEM
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Problems solved by technology
These two treatment methods have the following problems: return the mud to the chlorination furnace for recovery, and when the solid content of the mud is high, it is necessary to use the TiCl produced 4 It can be returned to the chlorination furnace after dilution, which will cause some TiCl 4 Repeated rinsing consumes a lot of energy; while using milk of lime for neutralization treatment, the mud contains about 40% TiCl by weight 4 , the direct treatment not only causes TiCl 4 The waste of titanium affects the yield of titanium, and a large amount of milk of lime is needed in the process of treatment, which is costly
At present, the treatment method for low boiling point substances is to use milk of lime to neutralize them and discharge them, which will also lead to TiCl in low boiling point substances 4 waste, low titanium yield; in addition, a large amount of lime milk is used, and the cost is high; at the same time, during the treatment process, the acid mist formed will corrode the field equipment and affect the health of the staff
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[0045] Below, the inventors have done mixture and low boiler recycling respectively to produce TiCl 4 The embodiment, wherein the condition parameters involved and the recycling rate are as shown in the embodiment in table 1 and table 2; 4 for comparison. The content of raw materials for producing titanium tetrachloride is the same in each experimental group in Table 1 and Table 2, that is, the content of titanium-rich slag, petroleum coke and chlorine in the chlorination furnace is the same. In actual operation, the pressure is not easy to control to a specific value, generally in a smaller range.
[0046] In Tables 1 and 2 below, SiCl 4 Utilization refers to the TiO 2 Reactive SiCl 4 and SiCl in mixtures or low boilers involved in recycling 4 The ratio; TiCl in the embodiment 4 Yield is TiCl produced by recycling mixture or low boiler method 4 And the production of TiCl in the original chlorination furnace 4 The total amount of TiCl in the comparative example 4 Yiel...
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The invention relates to a recycling method of low-boiling point matters in titanium tetrachloride production, belonging to the field of titanium tetrachloride production. A technical problem to be solved in the invention is to provide a method of recycling the low-boiling point matters in titanium tetrachloride production, which is low in cost and less in energy consumption. The recycling method comprises the following steps: a, reacting, wherein a mixture formed by mixing the low-boiling point matters with mud slurry or low-boiling point matters are used as materials to react with TiO2, reaction equation is as follows: TiO2+SiCl4=TiCl4+SiO2, and in the reaction process, temperature is not lower than 650 DEG C and pressure is not higher than 500 Pa; b, recycling, wherein TiCl4 generated in the last step is recycled, and generated SiO2 is exhausted. The method disclosed by the invention not only avoids carrying out neutralizing treatment on the low-boiling point matters and mud slurry, and is small in pollution, but also has less devices, a high SiCl4 utilization rate, high TiCl4 yield, and obvious economic benefits and social benefits.
Description
technical field [0001] The invention relates to a method for recycling low boiling point substances in the production of titanium tetrachloride, and belongs to the field of titanium tetrachloride production. Background technique [0002] The production process of titanium tetrachloride mainly includes two production processes: chlorination process and refining process. First, in the chlorination process, the titanium-rich slag and petroleum coke in the high-level silo are added to the conveyor according to a certain proportion, and are continuously added to the chlorination furnace through the conveyor, and chlorine gas is introduced to react at high temperature to form TiCl. 4 At the same time, it is taken out of the chlorination furnace under the negative pressure of the system. Removal of TiCl from the gas taken out of the chlorination furnace 4 In addition, it mainly contains SiCl 4 , AlCl 3 , FeCl 3 , MgCl 2 , CaCl 2 , HCl, CO, CO 2 and some MnCl 2 , FeCl 2 an...
Claims
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IPC IPC(8): C01G23/02C01B33/12
Inventor 陈常可张建安张静石云英龙文卫陈映志
Owner PANZHIHUA STEEL ENTERPRISES XINYU CHEM