SU1288180A1 - Method of producing granulated potassium fertilizer - Google Patents

Abstract

The invention relates to a process for the production of mineral fertilizers and can be used in plants producing potassium chloride and other potash fertilizers. In order to carry out the proposed method for producing granulated fertilizer fertilizer, a binding additive is introduced into fine-grained potassium chloride in fine-grained potassium in the form of a mixture of liquid glass and open-hearth donkey at their ratio (0.5 - 1.5): 1.0 in an amount of 2-4% mass of fertilizer. The use of the proposed method allows to increase the strength of potassium chloride granules by 1.2 - 1.5 times, and solubility to decrease by 1.5 - 2.0 times. 1 h. N. f-ly, 3 tab. with ss 00 00.

Description

.one

The invention relates to a process for the production of mineral fertilizers and can be used in plants producing potassium chloride and other potash fertilizers.

The purpose of the invention is to increase the strength and decrease the solubility of granular fertilizer while improving agrochemical

properties.

Example 1, 20 kg of open-hearth pshak mixed with 960 kg of potassium chloride. To the mixture obtained, 20 kg of liquid cTeiaia (the amount of binding agent is 4%, and the ratio of liquid glass: open-slag to 1: 1) is added. After stirring, the mixture is granulated, crushed and the -4 +1 mm fraction is separated. which is- use as ready fertilizer.

Example 2, 20 kg of open-hearth slag is mixed with 970 kg of potassium chloride, 10 kg of water glass is added to the mixture (the amount of binding additive is 3%, the ratio of water glass: open-hearth slag is 0.5: 1). Next, the process is carried out as in Example 1.

Example 3. 8 kg of open-hearth slag is mixed with 980 kg of potassium chloride. To the mixture obtained, 12 kg of liquid glass is added (the amount of binding additive 2, the ratio of liquid glass: open-slag 1, 5: I). Next, the process is carried out as in Example 1,

} Dirty glass is a marketable product obtained by way of process. Open-hearth slag is a waste of metallurgical production and has the following chemical composition, wt.%

CaO35.8-42.1

MgO6.8-12.4

Fe ,, 8-12,5

, 0-2.5

MnO. 8.0-8.5

 - TiO, j3,5-6,5

SiO, jEverything Else

Due to its specific chemical composition, open-hearth shpak catalyzes the solidification of liquid glass, which contributes to increased strength and decreases

solubility granules chloride KALIA. I

Table 1 shows the results of determining the optimal ratio

five

8I

five

L

35

40

45

50

55

802

liquid glass: open-hearth shpak, which achieves the best performance of the finished fertilizer for strength and solubility.

Tables 2 and 3 show the results of determining the effect of the addition of liquid glass and open-hearth slag according to the proposed method, as well as the addition of clay-salt sludge and liquid glass by the known method on the strength and solubility of granulated potassium chloride, respectively.

Specimen of potassium chloride is pressed at a pressure of 40 Sha and dried for 24 hours at room temperature. The solubility is determined by the gravimetric method by dissolving fertilizer granules with a mass of 5 g in 100 ml of a vase within 30 minutes.

The introduction of additives of liquid glass and open-hearth slag less than 2% does not significantly affect the improvement of the physicomechanical properties of the mineral fertilizer, and an increase in the additives of more than 4% is impractical due to a decrease in the content of the main component in the finished product and a slight change in its properties.

The results of agrochemical tests of granulated potash fertilizers obtained by the proposed I method are presented in table 4.

An analysis of the above results demonstrates the advantage of the proposed method compared to the known one. Thus, the strength of potassium chloride granules increases f, 2–1.5 times, and solubility decreases 1, 5–2 times.

Claims (1)

1. A method of producing granulated potash fertilizer by introducing potassium chloride into the fine-grained potassium by adding a liquid glass supplement followed by granulating and separating the finished product, characterized in mixtures with open-hearth slag with their ratio (0.5 –i 1.5): 1.0 in an amount of 2-4% by weight of fertilizer. p.1, about t l and h and yu- what is open-hearth slag chemical composition, 35.8-42.15 6.8-12.4 Table 1 The value of the indicator when the ratio of liquid glass: open-hearth slag (the amount of the additive 3% by weight of KCI) 0.3: 10.5: 11: 11.5: 1.2: 1 Strength granules KCI, tl45.4 -49,351,247,443,5 Solubility,% 26,222,020,821,023,9 Table 2 Ratio- The value of the indicator when the amount of the additive,% Indicator Nia liquid on the proposed method some glass: : open-hearth 12345 cue slag The strength of the granules KS 1, MPa Solubility,% 0.3: 1 Granule strength KS1, Sha0.5: 1 Solubility,% Granule strength KCI, YuTa1: 1 Solubility,% I Granule strength KS1, MPa 1,5: 1 Solubility,% Granule strength KS1, MPa2: 1 (Solubility,% 37,942,845,445,044,4 32,529-, 426,225,926,5 44.747,949,349,148,2- 25,923,122,021,922,8 45,450,551,248,747.3 27,223,820,820,122,3 43,447,247,446,846.0 26,222,921,021,222,6 38.842,943,543,843.4 28.4 25.423,923,424.2 Tioj 7.8-12.5 2.0-2.3 8.0-8.5 3.5-6.5 Else The value of the indicator when the amount of additive,% (ratir. Clay-salt ga.pam: liquid Indicatorglass 10: 1), by a known method 10 21520 Granule strength KS1, MPa35,236.238,340.3 Solubility,% 50,248,142,536,0 I Table 4: Type of fertilizers: Yield, kg / ha, with repeated increase in yield. .l j iLid.:..L Background + KC1 (Control U 35.3 32.6 33.2 33.7 Background + KC1 + 1% liquid glass + + 1% open-hearth slag, 43,443,436.5 41,17,422 Background + KC1 + 2% liquid glass + 2% open-hearth slag 50,148,248,0 48,815,1 45 Compiled by R. Gerasimov Editor I. Derbak Tehred M. Khodanych Order 7770/22 Circulation 430 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d.4 / 5 Production and printing company, Uzhgorod, Projecto st., 4 Proofreader V. But ha