SU823277A1 - Method of agglomerating phosphate raw material - Google Patents

Description

. one

This invention relates to a process for the preparation of phosphate raw materials for an electrothermal process for the production of phosphorus.

There is a method of agglomerating phosphate raw materials by mixing it with quartzite and coke, moistening the mixture with a 5% solution of phosphoric or sulfuric acid, taken in an amount of 8-12% by weight of the mixture and rendering followed by sintering the obtained granules 1.

The known method is the agglomeration of phosphate raw materials by pelletizing it in a mixture with quartzite and coke in the presence of binder of boiled milk, followed by sintering the granules 2.

A known method is the agglomeration of phosphate raw materials by mixing it with quartzite and coke, moistening the mixture with water, pelleting and sintering the obtained granules.

A disadvantage of the known methods is their unsuitability for the processing of apatite concentrate obtained by the enrichment of waste during the preparation of iron ore. The pellets obtained during the pelleting process are destroyed at the initial moment of sintering.

which leads to the attenuation of the agglomeration.

The purpose of the invention is to enable the processing of apatite concentrate obtained by enrichment of waste during the preparation of iron ores.

The goal is achieved

The fact that according to the proposed method of agglomeration of phosphate raw materials, including its mixing with quartzite and coke, moistening the mixture with water to round the mixture, followed by

15 by sintering the obtained granules, in the course of pelleting, a binder is introduced in the course of 2-3 minutes prior to its termination. In this case, a substance selected from the group containing

20 liquid glass, lime milk, boiler milk, sludge from phosphate production, a solution of phosphoric or sulfuric acid, pulp, manganese oxides. Liquid glass is introduced in the amount of 1-2% of the dry weight of the mixture, lime milk in the amount of 2-4%, boiler milk, 1SH1MYMA fossil of the original production and a solution of phosphoric or sulfuric acid in the amount of 2-5%, and pulp containing

15-25% of manganese oxides in the amount of j3-5%.

The introduction in the last stage of the neocarrier binder, its quantity and BfeiqecTBa, used as a binder, allow processing of apa, titanium concentrate, obtained from the enrichment of waste generated; preparation of iron ore from the product output 69-70%,

When the binder is injected more than 3 minutes before the end of the coating process, hardening of the granules does not occur, and when introduced in less than 2 NWH the outer layer with the binder does not reach the required thickness. that: also leads to their destruction during sintering.

Example 1. Dry mixture composition, wt.%:

Concentrate 53.5

Return 33.0

1Q 7.3

. Coke6,2

water content in the amount of 10.1)% of: the weight of the dry mixture and pelletized in a drum for 2 minutes, then a solution of liquid with a density of 1.15 is fed to the obtained granules in the same drum for 2 minutes at the end of the pelletizing process t / m in the amount of 1.5% by weight of the dry mixture. The prepared mixture is loaded, into an aglochash with a diameter of 400 mm, a layer height of 230 m. M, create a vacuum under a layer of charge of 1000 mm of a water column, light the mixture at 1200 s and bake. The productivity of the sintering process is 0-, 5. The yield of the fraction is more than 5 mm after testing the agglomerate for 69% strength.

Example 2. The mixture of Example 1 is moistened with water and pelletized, and the resulting granules are fed lime milk in density at the end of the pelletizing process; 1.1 t / m in the amount of 3% by weight of the dry mixture. The prepared mixture is sintered as in example 1. Productivity 0.51, yield 68.5%. .

Example 3. The mixture by example. 1 is moistened with water and pelletized on the obtained granules at the end of the process, pelletizing for 2 minutes, boiler milk with a density of 1.1 tons / m in an amount of 3.5% by weight of the dry mixture. The prepared mixture is as in Example 1. Productivity is 0.49, yield is 70%.

Example 4. The mixture on. Example 1 is moistened with water and pelletized; a 5% phosphoric acid solution in the amount of 3.5% is fed to the obtained granules at the end of the pelletizing process for 2 minutes. The prepared mixture is sintered as in example 1. Productivity 0.5 t / m h, yield 69%.

Example .5. The mixture of Example 1 is moistened with water and pelletized,

About at the end of the pelletizing process, pulp containing 20% manganese oxides is fed in for 4 minutes in an amount of 4% of the dry weight of the mixture. The prepared mixture is sintered as in Example 1. Productivity 0.49, yield 70%.

Claims (3)

1. A method of agglomerating phosphate raw materials, which includes mixing with quartzite and coke, moistening the mixture with water and pelleting, followed by sintering the obtained granules, different from the fact that, in order to enable the processing of apatite concentrate obtained by enriching the waste under the iron ore index, in. The binder is introduced into the coating process 2-3 minutes before it is finished. 2. The method according to claim 1, which is also distinguished by the fact that a binder is taken as a binder selected from the group containing liquid glass, milk of lime / kotrelnom milk, phosphoric sludge, phosphoric or sulfuric acid solution, pulp containing manganese oxides. 3. The method according to claim 1, characterized in that the water glass is introduced in the amount of 1-2% by weight of the dry mixture of lime milk in the amount of 2-4%, the boiler milk was used for phosphoric production and the solution of phosphoric or sulfuric acid is injected .in an amount of 2-5%, and pulp containing 15-25% of manganese oxides in an amount of 3-5%. 0 Sources. Information, taken into account. 1. The author's certificate of the USSR 639811, cl. From 01 to 25/01, 1977. 2. Phosphorous industry, 5 Vol. 9, 1976, p. 1-5. 3. USSR author's certificate number 181062, cl. From 01 to 25/01, 1964.