Title: Manufacturing method of azophoska by use of phosphorus ore
Application Number: 89105758 Application Date: 1989.09.06
Publication Number: 1049841 Publication Date: 1991.03.13
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C05G1/00
Applicant(s) Name: Cheng Zhigang Address: 415700
Inventor(s) Name:
Attorney & Agent: ZHOU KEFENG
Abstract:
     The present invention relates to an extraction method of azophoska by use of phosphorus ore. After the saline mixture containing potassium and trace elements is dissolved in water, the ground phosphorite is added, and then the alkali liquor is added so as to regulate its pH value to 7-10, and the above-mentioned materials are stirred into a colloidal substance under 50-100 deg.C, and finally the nitrogen fertilizer is added, and further the above-mentioned materials are mixed uniformly. Through cooling-off, the invented product is obtained thereupon. The N-P2O5-K2O contents are 5-18%, 2-15% and 9-21% respectively. Its process is simple, equipment investment is low, production period is short, and said fertilizer has many effective ingredients and the effective time of the said fertilizer is relatively long, and further it is advantageous to the improvement of soil propety.
Time: 6