SU509571A1 - The method of obtaining granulated complex fertilizer - Google Patents

Description

(54) METHOD FOR OBTAINING GRANULAR COMPLEX FERTILIZER

I

The invention relates to methods for producing a granular complex fertilizer based on rocks of coal mines or coal preparation plants.

i A known method for producing complex granulated fertilizer based on coal mine rocks or coal preparation plants by grinding the latter, mixing them with ammonia water, introducing superphosphate into mixture I, granulating and drying the obtained granules. However, the low level of macroelements and microelements of the feedstock into the i-digestible plant i is low, as well as the impossibility of obtaining uniform on 1; the accumulation of ICMQCH superphosphate.

The proposed method is crushed: the rock is pre-mixed with super phosphate, and then treated with nitric acid, followed by neutralization

The resulting mass of ammonia water.

Nitric acid is used with a density of 1.12-1.13 g / cm in an amount of 16-20% by weight of dry constituents. The resulting granules are dried at 100–15.

envisages a more complete transfer of kg-and micronutrients into an assimilable plant form and

to simplify the process, since when the initial components are mixed in dry form, a uniform distribution of superphosphate in the pile is quickly achieved.

Example, 880 g of a burnt out rock of the waste mine of the Livenka-4 mine (Donetsk) is ground in a ball mill to a fineness 2OOO-ZOOO. 8 g of powder is introduced into the indicated weight of rock. figurative superphosphate and the mixture is stirred until a uniform distribution of superphosphate particles in the rock. The resulting mixture is mixed with 156 g of nitric acid

you with ud. weight. 1.12 g / cm. Stirring is continued for 10 minutes until a homogeneous mass is formed. The excess acid is neutral

; licking with ammonia water, beats weight of 0.91 g / cm in the amount of 39 g. After neutral (about 3%), the mixture is granulated, then the granules

dried at 100-150 G

Granulated fertilizer produced

I has a water draw reaction of pI 6.2-6.6

 and contains process nitrogen 1,

 -.f :: H ..V - .., r, OOrj7.I.

   I

//, 3, 1.9% 4 Amount of phosphorus in fertilizer-MefiroB in an assimilable plant form and

MjfflaaBHCHT from the quality of superphosphatus. Process simplification, and a very small breed

and then treated with nitric acid.

Claims (3)

1. A method for producing a granulated Komi mass by ammonia water. lex fertilizer based on coal 2. The method according to p. 1, distinguishing x mines shea coal-free-float factories in that nitric acid is used to those of Israel shaving, processing with a mi-density of 1.12-1.13 - g / cm in the amount of , NOT COMFORTOttWintai cv followed by weight of the drycake components. granulation and drying of the obtained granules, 3. The method according to claim 1, characterized by the fact that, in order to obtain the granules dried more complete translation of macro- and microelegs at a temperature of 10 ° “150 ° C. pre-mixed with superphosphate,