Titanium sponge production technology

Chloride process
Titanium tetrachloride is mainly used for producing titanium sponge and titanium dioxide and titanium trichloride.Its manufacture method are many, mainly include boiling chlorination, molten salt chloride and shaft furnace chloride method.Boiling chlorination is current the main method of producing titanium tetrachloride (China, Japan, the United States USES), followed by the molten salt chloride (commonwealth of independent states (cis) countries have adopted), the shaft furnace chloride has been eliminated.Boiling chlorination is generally low levels of calcium and magnesium rich high-grade titanium material as raw material, and the molten salt chloride can be used with high calcium and magnesium of raw materials.TitaniumCN
Boiling chlorination
Boiling chlorination is rich titanium material of fine particles and the solid carbonaceous reductant (petroleum coke), under the action of high temperature, chlorine gas flow in fluidized state of chlorination reaction, thus making the method of titanium tetrachloride.The law has accelerated gas - solid phase mass transfer and heat transfer process, strengthen the characteristics of the production.Now boiling chloride at home and abroad to use the raw material with high titanium slag, natural rutile, artificial rutile etc.
Molten salt chloride
Molten salt chloride is the fine grinding of titanium slag or suspension in the molten salt, rutile and petroleum coke (mainly composed of KCl, NaCl, MgCl2 and CaCl2) medium, and chlorine gas is piped in, thus making the method of titanium tetrachloride.Generally also can use electrolytic magnesium waste electrolyte, under the condition of 973 k to 1073 k filling the chlorine gas, so the chlorination reaction speed by melt properties, composition, the types of reductant, the nature of the raw material, chlorination temperature, the concentration of chlorine gas and ventilation with speed, melt height, with the influence of factors such as carbon.
Shaft furnace chloride
Shaft furnace chloride will be chlorinated or rutile titanium slag and petroleum coke fine grinding, plus binder blending briquetting and the coking, the briquette made of material stack in vertical furnace chloride, a solid layer of state function of preparing to titanium tetrachloride method with chlorine gas, also known as the fixed layer chloride or mass of chloride, the current basic has been eliminated.
Mg reduction method
Is the essence of the magnesium reduction, in 880 ℃ ~ 950 ℃ under argon atmosphere, let the titanium tetrachloride with magnesium metal reaction of spongy titanium and magnesium chloride, with vacuum distillation to remove magnesium magnesium chloride and excess of titanium sponge, to obtain pure titanium, distillation condensate by recycling molten metal magnesium, magnesium chloride by molten salt electrolysis recycling magnesium and chlorine.Be obtained from the refined titanium tetrachloride titanium, divided into reduction and distillation of two steps.In a long period of time, reduction, distillation is carried out step by step, and now have to joint, large-scale.
Magnesium reduction, distillation process and equipment
Large titanium metallurgy enterprises are titanium magnesium joint enterprise, most manufacturers use reduction distillation integration process.This process is known as joint or half joint, it implements the raw material of Mg - Cl2 - MgCl2 closed-circuit circulation.
Integration of reduction distillation equipment, divided into "U" type and "I" type two kinds.Inverted "U" type equipment is the reduction pot (retort) and condensing tank with valve pipe connections between, establish special heating device, the whole system equipment before reduction assembled at a time."I" type of integration technology of system equipment such as one-time assembled before reduction, called joint method of equipment;And assemble the reduction device first, wait for after reduction, strike and then assembled condensing tank to distill for operation system of equipment it is called a string of joint, middle with magnesium "transitional period" link.