SU971835A1 - Fertilizer based on pulverulent superphosphate - Google Patents

Description

(54) FERTILIZER BASED ON POWDERED

12

The invention relates to fertilizers based on powdered superphosphate and can be used in the manufacture of granular mineral fertilizers.

A fertilizer based on g-powder-like superphosphate is known, including a neutralizing additive in the form of powdered limestone 1.

The disadvantage of this fertilizer is the low mechanical strength of granules (C O-15 mg / cm).

The closest in technical essence and the achieved result to the proposed one is a fertilizer based on powdered superphosphate in such a treating contact mass. Fertilizer also contains powdered limestone to G2 5.

The disadvantages of this fertilizer are I. The low content of assimilable PaO5 and the mechanical strength of the granules are low (17.95 kgf / cm X

The purpose of the invention is to increase the content of PjO in an assimilable form in the fertilizer and to increase the mechanical strength of the granules.

The goal is achieved by the fact that the fertilizer is based on powdered superphosphate, including SUPERPHOSPHATE

waste contact mass, additionally contains manganese sludge, phosphate rock and cement dust in the following ratio of components%: Waste contact weight 2-3 Manganese sludge 1-1.5 Phosphorite flour 0, Cement dust 0.5-0.75

10 Powdered

superphosphate Rest As the starting component, and use powdered superphosphate according to TU-6-08-277-73, phosphate rock

15 flour according to GOST 5716-74, used contact mass,%: 2-10.4, BaO 25-26.3, jOj 2.7-2.9, SiO, 40.8-41.2, KjO 10, 2-10,8, KCl 8,38, 5, manganese sludge,%: Mn 14-17,

20 CaO 4-5; 1-2, A120z 1-2, BaO 1-2, P-iOy 2-0,3, SiO / j 40-45, PPP and other impurities the rest.

Cement PAL is a waste after a bag filter of cement production of the following composition,% Sab, MgO 1-2, AliOj 3-4, 4-5, Si02 13-14, KjO 2-3, PPP and other impurities the rest.

The justification of the selected limits of the fertilizer state is presented in Table. one.

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As can be seen from the table. 1, as the amount of the additive is increased, the mechanical strength of the fertilizer granules increases, and the content of the digestible form P2O5 decreases. Therefore, a further increase in the number of input compositions 5 is impractical, and the reduction does not give the desired effect ..

Example. To 800 g of powdered superphosphate, add 20 g of Q with the ground of the contact mass, 10 g of margarine content of absorbable P-Oc,% 20 ± 1

Content of free acid in

in terms of% 1-2,5

Moisture content,%, not more than 4.0

Mechanical strength of granules, kgf / cm. not less

The proposed fertilizer has an increased content of PjOg in an assimilable form, the mechanical strength of the granules rises one and a half times, the granulometric composition of the fertilizer is improved, and its losses during transportation are reduced.

Claims (2)

Claim 1. Fertilizer based on powdered superphosphate, including otragantse sludge, 5 g of phosphate rock, 5 g of cement dust. The mixture of these components is mixed and placed in a laboratory granulator bunker, subjected to granulation with moistening with sea water with fine spraying with compressed air. Then the granules are discharged, dried, classified and analyzed. The characteristics of the obtained fertilizer in comparison with the known are given in table 2 table 2 21.4 2.35 3.64 28.00 17.95 10.0 botanic contact mass, characterized in that, in order to increase the content of P7O5 in an assimilable form and increase the mechanical strength of grail, it additionally contains manganese sludge, phosphate rock and cement dust at the following component ratio,%: Waste contact mass2-3 797183 Manganese,, 5 Phosphoritic flour O, Cement dust 0.5-0) 75 O Powdered superphosphate Remaining 2. Fertilizer according to claim 1, in which manganese sludge is represented It is a waste of mining processing. Following the "composition,%: Mn 14-17, CaO 4-5, FejOs 1-2, AlaOa 1-2, BaO 1-2, 83Ou 2-0.3, SiOi 40-45 , ppp and others the rest. 58 3. Fertilizer pop.1, characterized by the fact that the cement pier is a waste after the bag filter of cement production of the following composition,%: CaO 4546, MgO 1-2, 3-4, 4-5, ° 2 13 -14, KjO 2-3, PPP and other impurities else. Sources of information taken into account in the examination 1. USSR author's certificate .227333, cl. From 05 To 19/02, 04 .. 2. USSR author's certificate No. 615050, cl. From 05 to 1/00, From 05 D 9/02, 01.22.76.