| 摘要 |
FIELD: fertilizers, chemical technology. ^ SUBSTANCE: invention relates to methods for preparing mineral fertilizers, in particular, chlorine-free nitrogen-potassium fertilizers. Method for preparing the complex fertilizer in the process for preparing ammonium nitrate by conversion of calcium nitrate with ammonium carbonate involves replacing 4-21% of ammonium carbonate for potassium carbonate and after the mixed conversion the solution is prepared with mass part of salts sum 60 5% and this solution contains potassium nitrate and ammonium nitrate in the mass ratio = (5-25):(95-75), respectively. The prepared solution is used as the liquid complex fertilizer or water is evaporated and product is granulated by prilling method. Invention provides simplifying method for preparing nitrogen-potassium fertilizer comprising potassium nitrate and ammonium nitrate and enhancing its economy. ^ EFFECT: improved preparing method. ^ 3 cl, 1 ex
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