Titanium sponge production technology

Chloride process

Titanium tetrachloride is mainly used for producing Sunrui 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.

1, 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. Fushun titanium factory and zunyi titanium factory in our country's new boiling chlorination furnace diameter of 1.4 m and 2.4 m Φ Φ respectively, no sieve plate adopts the unique technology, chloride of zunyi titanium factory design nissan 70 t coarse titanium tetrachloride.

2, the 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. The commonwealth of independent states (cis) in the production of titanium tetrachloride best of molten salt.

Titanium production of "two cycle"

       There are two important circulating in Kroll Sunrui titanium sponge production process. These two cycles can reduce the production cost (most efficient use of magnesium chloride and reducing agent, chlorine) and reduce environmental pollution.
     (1), magnesium cycle, magnesium loop has inner loop and outer loop of the other. Without the inner loop is the molten salt electrolysis process proceeds directly to the vacuum distillation return magnesium reduction process. This can aid in the crucible or the reaction vessel with the worm to achieve blind. Outer loop refers to the vacuum distillation of magnesium and magnesium chloride molten salt electrolysis via renewable magnesium, and then return to this part of the magnesium reduction process.
     (2), chlorine cycle. Chloride molten salt electrolysis on the anode to give Cl2, Cl2 return this part of the chlorination process, to achieve closed flow loop in which the titanium chloride is called metallurgical industry.