METHOD FOR PRODUCING GRANULATED POTASH FERTILIZER Russian patent published in 1998 - IPC

FIELD: agriculture; chemical industry; production of mineral fertilizers at chemical enterprises producing potassium chloride and calcium carbonate as wastes. SUBSTANCE: fine-grain potassium chloride is mixed with reactant containing calcium carbonate in weight ratio KCl:$$$= =1:(0.2-4.0). Resulting mixture is treated with aqueous lignosulphonate solution used as binder. Aqueous solution is taken in concentration 10-35 wt.-%. During mixing, mixture is additionally enriched with microelement such as boron and/or manganese and/or cobalt and/or iron added in the form of aqueous solution of their salts. EFFECT: higher agrochemical properties. 5 cl, 1 tbl