Title: Preparation method for phosphate fertilizer with sulphur-phosphorus-aluminium-strontium ore
Application Number: 91111750 Application Date: 1991.12.29
Publication Number: 1073932 Publication Date: 1993.07.07
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C05B17/00
Applicant(s) Name: Chemico-Minerals Geological Inst., Ministry of Che Address: 072754
Inventor(s) Name: Huang Shouying, Liang Tianyou
Attorney & Agent: WANG SHUNCHANG WU FENGYING
Abstract:
     The invented process to prepare P fertilizer includes such technological steps as breaking ore, calcinating broken ore at 900-1150 deg.C for 40-60 min., suddenly cooling for 1 min. from higher than 800 deg.C to less than 400 deg.C, drying and grinding. The obtained neutral P fertilizer is suitable for acidic and alkaline soil, and serves as micro fertilizer, instant fertilizer and long-acting fertilizer.
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