SU901313A1 - Binding additive for pelletizing ores and concentrates - Google Patents

Description

I

This invention relates to a technique for the agglomeration of ore raw materials and can be used in pelletizing plants.

It is known that bentonite clays mixed with activators, and soda, which contains up to 50% of the weight of clay T, is used as a binding agent in pelletizing.

Also known is a binding agent for pelletizing, containing bentonite soda and polymethacrylamide of metas type with a ratio of ingredients: 5-1: 0.5-0.1 wt.% Based on the weight of bentonite {2.

A disadvantage of the known binding additives is the extra consumption of one of the activators, soda, which improves the binding properties of clay, but has a negative effect on the metallurgical properties of the pellets. Taking into account the tendency in pelletizing to reduce the consumption of Deficient alkaline bionton due to an increase in its binding properties, it proposes a composition that significantly improves the binding properties of alkali bentonites without (soda injection.

The purpose of the invention. - higher content of metal in raw materials, as well as elimination of the negative effect of the traditional activator - soda.

This goal is achieved in that the binding additive contains, as an activator, a water-soluble full-ionomer, which is an irregular copolymer of acrylamide and sodium acrylate with grafted butadiene-styrene units. The proposed activator contains 30-50% molar carboxyl units (per 100 side branches), 70-50% amide rpjoin and additionally 0.51, 5% styrene-butadiene units based on the dry weight of the polymer in the following ratio of ingredients, wt.%:

Monomer0.3-0.5

BentoshggGost

The proposed binder additive is intended to improve the properties of bentonites, which makes it possible to reduce their consumption to the charge in the production of pellets and to increase the metal content in the raw material.

P r and m-r. Compositions are prepared based on the Sarigyuh bentonKT and polymer.

B tab. 1 shows the composition of the composite. .

Content of components

The composition

%

monomer I bentonite

To-, national consumption,%

0.7

Investigate the binding properties of bentonite and obtain values of identical consumption, i.e. consumption, ensuring the same quality of pellets as with the traditional additive

The drawing shows a graph of changes in the properties of bentonite.

It can be seen that with the addition of ionomer, deeper changes in the properties of bentonite are achieved than with the introduction of the metas reagent. computer comp (sodium oxite sheita at blast smelting ..

Claims (2)

Claims of the invention Binding additive for okomk (a10M ores and concentration and restraint bentonite and activator. Boda soda. The technological tests carried out confirm the advantages of the curable binder additive in comparison with the known one. Tests of four compositions are carried out on a drum pelletizer with a diameter of 0.5 m. The mixture consists of a lebGOK magnesite concentrate, a sarygyuh bentonite and the proposed ionomer activator. The test results are presented in Table. 2 Table 2 characterized in that, in order to increase the metal content in the raw material, the additive contains, as an activator, a water-soluble polymer ionomer, which is an irregular copolymer of acrylamide and sodium acrylate with grafted butadiene styrene units, containing 30-50% molar carboxyl units ( per 100 side branches), 70–50% of the amide groups of the tl additionally 0.51 .5% of butadiene – hyrrhyl units of dry May, 5901313 sym of the polymer in the following ratio of ingredients, wt.%. 0.3-0.5 Ionomer Else Bentoint 5 to Sources of information taken into account in the examination 1. US patent number 3053647 75-3, 1970. 2. USSR author's certificate No. 648626, C 22 V 1/243. J.Mnac 50 27 24 2 / Is. / 5 12 but/ og 0 0.5 % peaze fTfOi