The Microplora Of The Bauxite Mine And The Selecting Of The Metallurgical Microorganisms

We collected three kinds of samples(include soil, water and mineral) from the bauxite mine in Henan province and investigated the microorganism resources of the samples.Then we get the number of the four kinds of microorganism including fungi, bacteria,actionmyces and silicate bacteria.We also analysised micro-ecosystem of the mine. In June toAutumn of 2005,we collected Jungi and silicate-bacteria from Changsha and Yueyang in Hunan province.From the microorganisms,we selected the used ones that can take off minerals such as silicate, iron and aluminum from the bauxite ores .Then we studied the condition of fermentation ,including the temperature,the acidity and time, that can increase the washing rate of minerals.The results are as follows:1. Samples that different in A/S ,the microflora of them are different, but the consititute are nearly the same. In four kinds of sample ,the soil had largest number and kind.So we can collect the original germs that useful for metallurgy from the round of the minerals.2. Though the analysis of the washing ability of the microorganism,in addition to the absorption rate of pour of kaolin .we get 11 stubs that can be used for metallurgy in the labarory.Most of them are Jungi,like penicillum.3. In the selecting of useful germs for leaching iron and Sulfur from bauxite mine,we get 5 kind of Thiobacillus ferrooxidans.In the laberory condition,all of them can leaching 70% of the sulfur. The most useful one reached the rate of 83.57%, in addition, leaching iron to 55%.4. The unit of bio-chemical is usage for the leacing of minerals in the metallurgical industry.The condition of ferment effected the leaching result,like the acidity,the temperature ,the concentration of sulfuric acid.