SU1030349A1 - Process for producing granulated potassium chloride - Google Patents

Abstract

THE METHOD OF OBTAINING GRANULATED POTASSIUM CHLORINE by pressing a mixture of initial potassium chloride with plasticizing agents based on a compound containing sulfate, potassium and phosphate ion, followed by crushing and dispersing crushed material, characterized in that, p. In order to increase the strength of the granules of the finished product, a mixture of calcium sulfate and phosphoric acid, taken in an amount of 2-60%, is used as a plasticizing additive, with their ratio in the mixture from 5: 1 to 120: 1.

Description

Co 4 Co 4: Co The invention relates to the production of granulated potassium chloride used as fertilizer. A known method for producing granulated potassium chloride, according to which the initial mixture of powdered potassium chloride with a content of 96-98% KCi and a temperature of 120-140 ° C, continuously compresses the roller press. The press tile is crushed and dispersed with a collection of commercial fractions. At the same time, the strength of the finished product is 30-40 Kr / cM-Cl. The disadvantages of this method of obtaining granulated potassium chloride are the relatively low strength of the finished product (30-40 kg / cm}, as well as the need to preheat the mixture to 120-140 ° C, which causes additional energy consumption. The closest to the invention is the technical essence and the achieved results. The method of obtaining granulated potassium chloride, which consists in pressing a mixture of the starting potassium chloride with salts of mineral acids, taken in an amount of 2-40%, at their ratio in the mixture (sulfate, potassium: oxide Phosphate 1 () .. At the same time, the strength of the granules is kg / cm 21. The disadvantage of the known method of producing potassium chloride is relatively low, the strength of the granules is 46-55 kg / cm. The purpose of the invention is to increase the strength of the finished product granules. that a mixture of calcium sulfate and phosphoric acid in an amount of 2-60% is used as a plasticizing additive, with their ratio in the mixture (5-120): 1. With the introduction of this mixture of plasticizing additives into the mixture of potassium chloride within the specified limits The static properties of the pressed charge, which leads to an increase in the density and strength of the pressed material and, as a consequence, to an increase in the strength of the finished product. In tab. .1 the results of experimental studies on the pressing of potassium chloride with the addition of calcium sulfate and phosphoric acid are cited. As can be seen from the table. 1, an increase in the combined content of additives to 1-potassium chloride leads to an increase in strength while simultaneously increasing productivity by increasing the granularity of the charge. In tab. 2 shows the result of the experimental work on pressing potassium chloride with varying percentages of additives. As can be seen from the table. 2, the introduction of additives in the amount of potassium chloride in the amount of 2-60% leads to an increase in the strength of the granules while reducing energy consumption. With the introduction of additives in the amount of potassium chloride in an amount of less than 2% (at a ratio of less than 5: 1), no significant increase in the strength of the finished product is observed. Introduction to the mixture of additives in an amount of more than 60% leads to the lack of., The depletion of the product according to the nutritional component. The technology of the method is as follows. 2-60% of a mixture of calcium sulfate and phosphoric acid are mixed into a mixture of powder (5-120: 1) and granulated material is crushed and dispersed. The strength of the finished Example 1. Potassium chloride in the amount of 490 kg is mixed with 10 kg of calcium sulfate and 2 kg of phosphoric acid, and then pressed. The tile is crushed and scattered. The strength of the finished product is 59 kg / cm. Example 2. Potassium chloride in amounts A 700 kg of material is mixed with 300 kg of calcium sulphate and 5 kg of phosphoric acid, and then pressed. A tile having a density of 2.12 g / cm is crushed and dispersed. The strength of the finished product is 65 kg / cm. Example 3. Chloride Potassium in the amount of 400 kg is eaten with 60Q kg of calcium sulphate and 5 kg of phosphoric acid, and then a molding is pressed, having a density of 2.14 g / cm, is robed and dissipated. The strength of the finished product is 71 kg / cm. The proposed method provides the magnitude of the strength of the finished product to 59-71 kg / cm2.

Table 1

59 62

40 Plant capacity, t / h (according to the project 0, 850 0.915 0.980 0.5 t / h)

18.4 17.3 15.0 14.6

71

65

65

70

table 2

14.1

14.1 1,050 1,060 1,0601,060

Claims (1)

METHOD FOR PRODUCING GRANULATED POTASSIUM CHLORIDE by pressing a mixture of the initial potassium chloride with plasticizing additives based on compounds containing sulfate, potassium and phosphate ion, followed by crushing and dispersion of crushed material, characterized in that, p. In order to increase the strength of the granules of the finished product, a mixture of calcium sulfate and phosphoric acid taken in an amount of 2-60% is used as a plasticizing additive, with their ratio in the mixture from 5: 1 to 120: 1. With Λ with