Title: Method for producing phosphate fertilizer from S-P-Al-Sr Ore
Application Number: 89104132 Application Date: 1989.11.24
Publication Number: 1041749 Publication Date: 1990.05.02
Approval Pub. Date: Granted Pub. Date: 1993.05.19
International Classifi-cation: C05B17/00
Applicant(s) Name: Qingping Phosphorous Mine, Sichuan Prov. Address: 618202
Inventor(s) Name: Liu Renfu, Peng Yingting
Attorney & Agent: WANG XINGWEN
Abstract:
     This method features as follows: the original ore is directly broken into granules in a certain granularity range without ore dressing; the granules are put into a furnace or kiln for oxidative calcination; finally they are ground to obtain the phosphate fertilizer. Data from large scale field experiment has shown that it has advantage over general Ca nad Ca-Mg-P fertilizers in both current and later effectivenesses. With its later effect, the yield can be increased by 40% as compared with common Ca fertilizer. Furthermore, for equal consumption, it can increase the yields of rape, wheat and rice by 30-40, 28-37 and 50 kg/mu respectively.
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