SU1518328A1 - Method of conditioning complex fertilizer - Google Patents

Abstract

The invention relates to a method of conditioning complex fertilizers used in agriculture. The purpose of the invention is to reduce the caking of the fertilizer. The method of conditioning complex fertilizers by mixing talc-magnesite with mineral oil in a ratio of (0.5-0.1): 1.0 and applying the mixture to the surface of the granules in an amount of 0.5-4.0% by weight of the fertilizer. Talcomagnesite contains 4-56% magnesite. 2 hp f-ly. 4 tab.

Description

The invention relates to a method of conditioning complex fertilizers used in agriculture.

The purpose of the invention is to reduce the fertility of the fertilizer.

Example 1. To 100 kg of granulated nitroammofoski, with continuous stirring, add 0.5 kg of conditioning additive containing 1 part of mineral oil and 0.5 parts of talcomagnesite.

Caking fertilizer 22 kPa (fertilizer not caking).

PRI mme R 2. To 100 kg of granulated nitroammophoska, with continuous stirring, add 4 kg of conditioning additive containing 1 part i of talco magnesite and 1 part mineral oil.

Caking fertilizer 15 kPa (fertilizer not caking).

Example To 100 kg of granulated nitroammofoski, with continuous stirring, add 4 kg of conditioning agent supplements containing 0.7 parts of talcomagnesite and 1 part of oil. The fertility of the fertilizer is 20 kPa (the fertilizer does not agglomerate).

In all experiments, I-20 industrial oil was used. In addition to this oil, other brands of oils have an identical effect: I-12, VNP-23.

The essence of the invention is as follows.

Silanes and sloxanes are hydrophobic substances. When hit

moisture is not absorbed into the fertilizer by a coating (silane or siloxane). Since the silane film on the surface of the granule is not solid, the water is in contact with the fertilizer, its solution. When it dries, a salt bridge is formed, which leads to partial caking of the fertilizer.

Talcomagnesite is a hydrophilic substance. Its moisture capacity is 0.35 - 0.4 mmol / g. When wetting fertilizer talkomagn1 it FIR (L

ate

00

from th

00

moisture and prevents from the formation of a solution, which causes a decrease in caking fertilizer.

The effect of the ratio of talcomagnesite: oil on the caking of the fertilizer is presented in Table 1.

The data of Table 1 shows that with a content of talcomagnesite in a mixture of 0.5-1.0 parts per 1 part of oil, fertilizer does not cake. It is impractical to reduce the content of talc-magnesite to less than 0.5 parts by 1 part of mineral oil, since the fertilizer is compressed, and its content is increased (it is impractical because the traceability does not change.

The effect of the amount of conditioning additive on the caking of the fertilizer is presented in Table 2.

The data of Table 2 show that when the content of the conditioning additive is in the amount of 0.5-4% by weight of the fertilizer, the caking is 22-15 kPa, i.e. fertilizer is not caking. Reducing the amount of the conditioning additive to less than 0.5% is impractical, since the fertilizer compresses the caking (40 kPa). When the content of the conditioning additive is more than 4%, the fertilizer also does not cake, however, it is not advisable to increase the amount of the conditioning additive by more than 4%, since this increases the cost of fertilizer, and the effect is achieved with a lower content of the conditioning additive.

The dependence of the caking of nitroammophos on the magnesite content of talco magnesite used for conditioning is presented in Table. 3

0

0

 five

Q

five

35

40

As can be seen from Table 3, the magnesite content should be strictly defined (4-56%), otherwise the requirements of GOST on 100% product friability are not satisfied (with a product tracking level of 20 kPa, the fertilizer crumbling becomes incomplete.

The caking and compactibility of pilot batches of nitroammoses is presented in Table 4.

The comparative data presented in Table 4 were obtained under comparable conditions and indicate a higher efficiency of the method of conditioning fertilizers using talcomagnesite compared with the method of the prototype.

Claims (3)

1. A method of conditioning complex fertilizers by mixing an inert substance with mineral oil and applying the resulting mixture to the surface of fertilizer granules, characterized in that, in order to reduce the caking of fertilizer, talcromagnesite is used as an inert substance, which is mixed with mineral oil in a ratio (0, 5 0.1): 1.0. 2. Method POP1, characterized in that the mixture is applied to fertilizer granules in an amount of 0.5-4.0% by weight of fertilizer. 3. The method according to claim 1 and 2, characterized in that the talcomagnesite contains magnesite within 4-56 wt.%. Table 1 Amount of conditioning additive,% 0.4 0.5 2.0 4.0 4.0 4.5 Caking, kPa 40 22 20 15 15 The content of ICCOe in Tracking talcomagnesite, 7, nitroammophos, kPa O21 420 (GOST requirements) 2017 3015 4013. 5016 5620 (GOST requirement) 60 22 7035 Table4 Method of conditioning Amount of Tracking, Loose-nitroammophos additives, | kPatiy, wt.% Unconditioned sampleO6365 Monomethylsilane + + Kaolin 0.5 + 2 3778 Talcomagnezit0.5 13,100 Compiled by R. Gerasimov A. Makovska Editor Tehred A. Kravchuk Proofreader E. Lonchakopl Order 6562/28 Circulation 391 VNIIPI State Committee for Inventions and Discoveries of the CST G. G. GSR 113035, Moscow, Zh-35, 4/3 Raushsk nab. Production and Publishing Combine Patent, Uzhgorod, st. Gaglrin ,, 101 Subscription