SU796232A1 - Packing mass for blast furnace chutes - Google Patents

Description

one

The invention relates to the production of carbonaceous refractory materials, namely ramming masses for blast furnace chutes.

A known refractory mass for gasketing chutes of blast furnaces, containing 55-80% coke, 10-35% refractory clay and 7-25% coal tar p. L.

The closest technical solution to the proposed mass is a refractory composition containing graphite or amorphous carbon in an amount of 20-80%, crystalline silicon or ferrosilicon 5-30%, clay-refractory, and bentonite, etc., as a plasticizer. 2T.

However, this refractory composition does not provide strength at drying gutter temperatures (1000 ° C) and service life (1500 ° C), which leads to industrial erosion to the destruction of the gutter.

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

This goal is achieved in that the packed mass for blast furnace chutes, including carbon-containing material, is crystalline silicon.

refractory clay and plasticizer, as carbon-containing material contains a mixture of unclipped blast furnace coke and graphitization waste 5 of electrode production in a ratio from 1: 1 to 6: 1 with the following content of components, wt.%: A mixture of undigested blast-furnace coke and waste GratO fusion.

production in the ratio from 1: 1 to 6: 1 46-70 Crystalline silicon .5-17 15 Clay is refractory. 15-30 Plasticizer5-7

The preparation of the proposed masses can be carried out according to the conventional technology for producing gutter, case and tap-hole masses. Humidity gutter mass 7-11%. The proposed mass can be used to close the iron notches of blast furnaces.

25 furnaces. Humidity of the summer mass should be 14-18%. If the tap-off mass is poured out to a moisture content of 6–11%, then it can be used for stuffing casings of cast-iron tap-holes (case-shaped mas30 jca.

Introduced waste of graphitization of electrode production has a chemical composition, wt.%:

C 56-60

12.3-20 6.04

4-6

", Fy

3.43-3.97 0.26

CaO 0,46-0,58

 MgO. . 0.10-0.30

20-0.26

K.00,22-0,34

Bobsh, 0.59-0.69

P-iOsFoots

Examples of ramming mass of various compositions and the results of their tests are shown in the table.

The composition of the mass, wt.%: Natural graphite

Uncooked Coke

Electrode production graphitization waste

Crystal Silicon Clay Oneuporn

Plasticizer: Bentonite

Kaolin

Clay

Sdb

Properties after firing at

1500 ° C:

Compressive Strength

kgf / cm

Oxidability, mg / cm-min

The degree of erosion of cast iron mg / cm-min

As can be seen from the table, the printed mass of the proposed composition has a higher mechanical strength. Its use makes it possible to improve sanitary conditions, since the content of carcinogenic substances in the environment is reduced.

Claims (2)

Invention Formula The padding mass for chutes of blast furnaces, including carbonaceous material, is crystalline silicon. 35 35 60 .10 10 36 35 35 10 17 10 5 30 30 15 30 15 20 5 5 51 169 117 138 92 0.7 3.4 1.9 3, 1 2.8 1.6 0.7 O, 96 1.1 " Refractory clay clay plasticizer, characterized in that, in order to increase the strength of the lining, it contains carbonated material as a mixture of non-calcined blast furnace coke and waste graphite 1I to 6: 1 with the following content, wt.%: A mixture of non-calcined blast furnace coke and graphitization waste of electrode production in the ratio from 1: 1 to 6: 146-70 Crystalline silicon 5-17 Clay refractory 15-30 Plasticizer 5-7 Sources of information taken into account during the examination 1. Krasavtsev N.I. and others. Mechanization of work in blast furnaces M., 1968. 2. Patent AGR No. 3842760, cl. From 04 to 35/52, published 1974.