SU1204563A1 - Method of granulating potassium chloride - Google Patents

Description

one

The invention relates to a method for granulating mineral fertilizers from fine-crystalline potassium salts and can be used in potash industry.

The purpose of the invention is to increase the penetrability of the granules and the yield of the granules of the commercial class.

Example. Fine-grained potassium chloride is heated to SO2 and mixed with sulphite-alcohol stillage solution, taken in an amount of 3 wt.% (In terms of the dry matter content). The resulting mass is granulated using a known device by the method of pushing ™ or a wet plastic material through a molding lattice. There are molded granules in a fluid bed apparatus. The finished granules are scattered, the amount of granules with a size of + 1-4 mm is determined. Other-

Sulfite-alcohol

bard3

Same 3

Sulfite-alcohol bard3

Same3

Potash slime .10

Same10

- -ten

2045632

The granularity of the granules is determined by crushing 20 samples on a hydraulic press. The strength of the granules obtained in the experiment is. 5 41.6 kg / cm granules yield 90.9%. Other examples of the method are tabulated.

ten

15

Thus, from the examples presented in the table, it can be concluded that heating the starting material before moistening and granulating allows increasing the strength and yield of commercial grade granules.

Using the proposed granulation method allows to improve the quality of the granulated product (to increase the strength of granules 20 to 35-40 kg / cm) and to intensify the process of obtaining a granulated product by increasing the yield of commercial grade granules by 10-15%.

35.9

38.6

42

42.1 39.8 42.3

31.8 32.3 33.5 37.8.

77.5 87 92

90.9

68 93.2

81.6 82.8

87 90.4

Order 8.D86 / 22 Circulation 461Subscription

VNISh State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch SHSh .Patent, Uzhgorod, Proektna St., 4

Claims (1)

METHOD FOR GRANULATING POTASSIUM CHLORIDE, including mixing it with a binder, forcing the mixture through a forming lattice and drying the resulting granules, which is different in that, in order to increase the strength of the granules and yield granules of a commercial grade, potassium chloride is heated to 70 before mixing -115 ° C. Joint venture 1 1204563