SU793966A1 - Method of producing granulated potassium chloride - Google Patents

Description

one

The invention relates to the production of potash fertilizers and can be used to obtain granulated potassium chloride with improved physicomechanical and agrochemical properties, as well as characterized by increased stability during transportation and storage.

There is a method of increasing the mechanical strength of potash fertilizer granules by introducing various additives during pressing (ammonium nitrate, magnesia cement, water glass) 13

The disadvantage of this method is the relatively high cost of additives.

The closest in technical essence to the present invention is a method for producing granulated potash fertilizers using sulphite-alcohol bards concentrate sowing in combination with lime, lime or dolomite flour as a binder additive.

The disadvantage of this method is the high cost of lime and the fact that the caking rate does not exceed 74 kgf / cm.

The aim of the invention is to increase the mechanical strength of fertilizer granules, to enrich it with macro and microelements and reduce the cost of its production.

This goal is achieved by the fact that, in addition to the well-known method of producing granulated potassium chloride by pressing in the presence of a mixture of PRS and lime-containing rocks, and as a lime-containing additive, peat ash is used.

Peat ash is taken in the amount of 0.5-2.0%, and the PRS - in the amount of 0.10, 6% by weight of the charge. The addition of water at the granulation stage is 12%.

Peat for ash is a highly effective lime fertilizer, and also a source of nutrients such as phosphorus, potassium, magnesium, sulfur, manganese.

Thus, the addition of peat ash additives to potash fertilizer will significantly improve its agrochemical properties.

Example. 976 kg of dry potassium chloride, isolated after flotation, and saturated fatty amines, mixed with 20 l of 20% 4-th aqueous solution and 20 kg of peat ash. The mixture of pre-rotating drum rollers obtained briquettes are dried at, then crushed and fractionated. The finished product with pieces of desired size is taken out of the pro- duction cycle, and smaller, larger particles direct the re-pressing. For the tests, we used toric ash from Smolevskaya GRES (Veloca SSR) with the following limiting content of the main components in the calcined ash, wt.%: 28.1-74.6 11.9-32.5 11.1-3.4 0, 83-1.59 0.75-1.40 1.35-3.60 1.03-3.00 6.40-15.80 1.43-6.32 0.06-1.10 0.005-0.015 . Organic inclusions {. Loss on ignition) amounted to 5.520, 2 wt.%: Granulometric composition of the studied peat ash: The particle size of the ash, MV А.1.25-0.63 1.25-0.63 0.63-0.315 0.315-0.140 Content,% 6.7-16.0 3.8-14.3 8.0-22.4 15.0-43.0 16.8-48.6 Most of the ash dump is fine powder with a particle size of less than 0.315 mm. The effect of the addition of peat ash to the strength of the flotation KS opreg is done according to the following procedure. Potassium chloride is mixed with certain amounts of an aqueous solution of CER and peat ash, then 5 g of the mixture is placed in a mold and pressed on a hydraulic press at a pressure of 50 kgf / cm with a holding time at this pressure for 5 minutes. The resulting briquettes KSI removed from the forms and dried. in a drying cabinet at 98-110 C. The strength of briquettes is judged by the breaking force when they are crushed. The results of the influence of additions of sulfite-alcohol bards and peat. ash caking flotation potassium chloride in the table.

PRS

Peat on ash

Cob + peat on

ash

Cob + peat on

ash

Cob + peat on

ash

PRS + trrf on

ash

Cob + peat on

ash

50.0 55.0 61.4 66.88

81.88

88.13 85.32 74.5

As can be seen from the table, the addition of peat ash instead of lime significantly increases the mechanical strength of pressed KSb briquettes.

Claims (2)

1. A method of obtaining granulated potassium chloride, by pressing in the presence of a mixture of sulfite-alcohol bards and lime-containing rocks concentrate, characterized in that in order to see the mechanical strength of fertilizer granules, to enrich it with macro and microelements and reduce the cost the production process, peat ash is used as a brew containing additive. 2. A method according to claim 1, characterized in that the top ash is introduced in an amount of 0.5-2.0%, and the concentrate of sulfite-alcohol bards in an amount of 0.1-0.6% by weight of the charge. Sources of information taken into account in the examination 1. Bel G.N. The Effect of Strengthening Additives on the Efficiency of Granulation of the CS ... Chemistry in Agriculture, No. 9, 1971, p. 17 .. 2. Authors certificate of the USSR 430087, cl. From 05/04/02, 1974, (prototype).