SU1198045A1 - Method of granulating phosphorite meal - Google Patents

Abstract

METHOD OF GRANULATION OF PHOSPHORITE FLOUR in the presence of a binding additive with subsequent drying of the obtained granules, so that, in order to increase the strength of the granules, the yield of the marketable product and the increase in the content of citrate-soluble binding agent, they use The amount of lignosulfonate in the amount of 5.8-13.5% of the total mass, which is applied until the moisture content of the mixture is 10-25%, followed by dusting the surface of the granules with a moisture content of 10-23% by phosphogypsum or lime powder.

Description

UD

x

4 SP

 . .

The invention relates to methods for producing granulated phosphate rock flour, which is used as a mineral fertilizer.

The purpose of the invention is to increase the strength of the granules, the exit of the marketable product and the increase in the content of citrate-soluble P Oe. Example I. A 1000 g phosphorate flour of the Chilisai phosphate combine is moistened with 50 grams of lignosulfonate (ADD) and mixed in runners. The resulting moist mass is fed to the granulator. Granulated. 5 minutes, moist granules are dusted with phosphogyptome and dried. The strength of the granules is 76 kgf / cm. Content is lemon-soluble, 7.0 j. %

PRI mme R 2. Phosphorite flour of the Brnish phosphate plant in the amount of 1000 g is moistened with 200 g of a saturated solution of MDB and mixed in runners. The resulting moist mass is fed to the granulator. It is granulated for 5 minutes, the wet granules are powdered with lime powder and dried. Durability of granules 79 kgf / cm. Content of citrate soluble 2) weight

PRI me R 3. Phosphoric flour of the Upper Kama fosrudda1 in the amount of 1000 g, previously crushed on a pulsed crusher to a particle size of 50 microns, is placed

980452

runners, wet 180 g of the nactile solution of BD. The wetted mass is fed to the granulator. Granulated for 3 min. Wet granules powder

5 dry phosphogypsum and dried. Gra strength: zero 80 kgf / cm. Content is citric soluble 21.2 wt.%.

Tables 1 and 2 present the results of granulation of phosphate flour.

o The data in Table 1 show that the best results for granuliron, phosphorite flour are achieved in the range of moisture content of the mixture from 10 to 25% and the content of RRB from 5.8 to 13.5%.

5 At lower concentrations of MDB in the specified moisture range of the material, the strength of the granules decreases.

As follows from the experiment. data, the terms of

The Q of the moisture of the impacted material is essential in achieving the goal.

Granulated phosphoritic flour, obtained according to the proposed method, has advantages in terms of the strength of the obtained granules and the quality of the fertilizer - it contains a small amount in an assimilable, limiting form. In addition, the granulation process is not costly, the communication used is available and increases the agricultural efficiency of the resulting product.

Table 1

Routes

Known cova 40.5

9.0

Table 2

1.8

flour

Claims (1)

METHOD FOR GRANULATING PHOS- FORT FLOUR in the presence of a binder additive, followed by drying of the obtained granules, heating and so on, in order to increase the strength of the granules, yield a marketable product and increase the content of lemon-soluble ^, a lignosulfonate solution in the amount of 5 is used as a binder , 8-13.5% of the total mass, which is added until the mixture reaches moisture content of 10-25%, followed by dusting the surface of the granules with a moisture content of 10-23% by phosphogypsum or limestone flour.