Study On Effective Utilization Of Phosphate And Sustainable Development Of Kailin Group

Kailin phosphate mine consists of six sections. there is 418 mililon tones of ore reserve has been exploited and 300 million tones is still not mined by the end of 2002. The average grade of P2O5 , MgO and R2O3 are 33.67%, 1.16% and 2.7% respectively. This phoshate is ideal raw material of compound fertilizer. The mine is open up by Kailin group and Kaiyang county. Kailin group of Guizou province is a chemical corporation which mainly produces and processes phosphate, it being one of the six lagest bases of phosphate in china, and its yearly output is 2.2 milion tones which is about 10 percent of the yield in china.The thesis studies how to mine the ore under village and highway , to utilize the commom ore in order for achieving the best benefit and sustainable development of the enterprise. The following are some conclusions:1. The recovery of phosphate may reach 55 percent, and while the third class safeguard of surface deformation can be met,if strip mining be adopted; But it may be 70 percent if the villages over the mine be shifted. So the way of shift is recommended.The recovery of phosphate may reach 45 percent and the second class safeguard of surface deformation can be satisfied if the ore uder Jingao highway be mined with strip mining, Therefor strip mining is recommended for the ore under highway. The surface slope of of Jingyang highway area is greater than 45° , what is more, faultages growth seriously, and there are some reliques of old coast in this area. The probable damage type in this area will be new coast if the ore under the surface be mined. So abandoning Jinyang highway has been proposed .3. Mineral processing is proved more reasonable than blending ore by comparing with practicing and economy of the two processing.4. The resource of phosphate is the coral competitive force of kailin Group. The development of Kailin Group can not be roughly expanded the scale of the mining, and the critical way of sustainable development is to develop processing industry mainly depending on the high quality ore.If the research project is adopted, the reserve (A+B+C+D) will increases from the existing 210 million tones by the end of 2002, of which the high quality ore and common ore are 133 million and 77 million tones respectively, to 229 million tones thereinto the high quality ore and common ore are 152 million and 77 million tones respectively. In this way the time limit will be extended 4.8 years.