SU897731A1 - Raw mixture for producing ferric cement - Google Patents

Description

I

The invention relates to building materials, namely, to raw mixtures of ferrous cements.

Raw mixtures for ferritic are known. CjjAFj cements prepared on the basis of chloroferrite, chlorosilicate and chloraluminate. tn.

The most close to the pre-raw material is a mixture for the production of ferrous cement, including calcareous and iron-containing coyunents {2}.

A disadvantage of the known raw material mixture for producing ferrous cement is strength.

The purpose of the invention is to increase the strength of cement.

This goal is achieved by the fact that the raw mix for the production of ferrous cement, including lime and iron-containing components, contains red as the iron-containing component.

sludge - waste alumina production in the following ratio of components, weight. %:

Lime

component42-52

Koas slime alumina waste

production 48-58

To obtain raw material mixtures use red slag - waste.

1 in the alumina production of the Ural and Dneprovsky aluminum smelters, with excellent FcjOj content and ratio-. Red mud of thin-bodied material with content of particles with a radius of 0 µm up to 90%, composed,%:, 0-46,0; AbOj 17.0-19.0; SIOj 6.7-10.9; CaO-7,4-9,9; PiOg - 0.2-0.3; TiOi- 4.4-6.3; MsjO - 6.9-2.2.

20

Two series of experiments were carried out: I on the Ural red mud with p, 45 and I on Dneprovsk with p 0.35.

For each batch, five formulations of raw mixes are prepared.

Each mixture is prepared separately as follows.

Red shly crushed to polar passage on sieve No. 008 is weighed out in the required quantity - from the course of alumina production and limestone, mixed thoroughly for 20-36 minutes, after which the prepared mixture is moistened and subjected to granules.

Before firing, the granules are dried: first, in the air, and then in Cy977314

an oven at 100-120 ° C for 2-3 hours. The granules are fed into the kiln and fired at 1220-1280 °. Firing is carried out until the lime is completely absorbed. 5 Cooling is carried out sharp, air.

The compositions of the mixtures and the results of tests of cements based on them are represented by 0 lei in the table.

Tests show that high strength ferrous cement can be obtained from the proposed raw mix. .

Claims (1)

Claim . The raw material mixture for the production of ferruginous cement, including calcareous and iron-containing components, is clear from the fact that; with 45 goals of increasing strength, it contains red mud as an iron-containing component - waste from alumina production, in the following ratio of components, wt.%: Lime 'component 42-52 Red mud sludge alumina production 48-58