Extraction process of strontium in strontium ore
There are many ways to recover hydrazine comprehensively. The common method of chlorination distillation is commonly used. The method is to convert the hydrazine in the raw material into a sulfuric acid solution, add the tannin to obtain a tannin precipitate, and after oxidizing and roasting to remove arsenic and detoxification, chlorination at 83 to 100 ° C to obtain GeCl4. The following reactions occur during the chlorination distillation:
GeO3+4HCl=GeCl4+2H2O
GeCl4 is hydrolyzed to obtain pure GeO2, and the following reactions occur during the process:
GeCl4+2H2O=GeO2+4HCl
GeO2 and hydrogen is reduced to give metallic germanium having from about 10 ~ 20Ω · cm resistivity, the reaction is:
GeO2+2H2=Ge+2H2O
(1) Recycled by preferential volatilization method, the raw material is firstly made into a dough, and after volatilization, the volatilization rate is 90% to 98%; then the dust is extracted according to the classical method, and the recovery rate of the antimony is said to be as high as 90%. In China, this method has been used to extract yttrium from zinc concentrate containing 0.006% to 0.008% Ge. After two reductions and volatilization, the obtained sulphide dust is extracted by the classical method, and the recovery rate of strontium is 75% to 80%. .
(2) sulfated - recovery of germanium and vector processing method of this precipitation germanium containing 0.022% germanium deposit Zaire, by flotation to obtain a germanium-containing 0.13% of copper concentrate, copper smelting was obtained containing 0.36% Ge soot by Sulfation converts the ruthenium into the sulfuric acid system, and after purification, the ruthenium in the solution is precipitated by using MgO as a carrier, and then extracted according to the classical method. The Belen plant in Belgium is produced using this method, and the recovery rate of hydrazine is 75%.
(3) Recovery of hydrazine by alkaline earth metal chloride distillation.
(4) Tobacco recovery by recovery.
(5) Redox roasting recovers hydrazine.
(6) Re-evaporation and recovery of hydrazine.
(7) recovering germanium extraction recent years, many solvent extraction of germanium larger research progress extracted germanium available kerosene, CCl4, MIBK, Lix63 system in diethyl ether and hydrochloric acid; sulfuric acid in the system available TOA, P204 +YW100, Lix63 and Kelex100, etc., which can be produced according to the specific conditions.
(8) The blast furnace is used to recover hydrazine.
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