SU983117A1 - Charge for producing refractories - Google Patents

Description

(54) CHARGE FOR PRODUCTION OF REFRACTORIES

one

The invention relates to the refractory industry, in particular to refractory materials used in products used and continuous casting of steel.

Known shnhta (1 for iztotovlenn refractories, containing, wt.%:

Crystal Quartzite / 35-45

Quartz sand .33-51

Self-dissolving slag2-4

Liquid glass12-18

Also known composition 2, containing, wt.%:

Crystal QuartziteBase

Slag of the main self-disseminated metallurgical production1-3

% | dry glass15-25

Silicone emulsion 0.01-10

The disadvantages of these charges are low mechanical strength and density of the products due to the presence in the mixtures as a binder of liquid streak, which contains alkali, which adversely affect the refractory properties of the products.

The most technically advanced to the offer is the charge (31. for the manufacture of refractories, containing, wt.%:

Crystalline quartzite

95-99

Slag 1-5

Liquid glass Sq. 1.21, 35 g / cm

16-18 (over 100%)

The disadvantages of the known products are the low product quality by mechanical strength ((253 kgf / cm) and density (f 1.76 g / cm) and, accordingly, the relatively low quality of the products.

The aim of the invention is to determine the density and mechanical strength.

This goal is achieved, that the charge for the manufacture of fiberglass, including crystalline quartzite, shpak and binder, contains ethyl silicate as a binder and additionally concentrates 1 sulphite-brews with the following COPI component wearing, wt.%:

Crystalline quartzite83-91

Slag1-9

Epshshshkat.4-6

 Concentrate sulfite alcohol 4-6 Additives to the mixture of ethyl silicate in the amount of 4-6% and binder - sulfite alcohol brewing concentrate in the amount of 4-6% are optimal. With the introduction of a silicate in binding, less than 4% of the product does not have the necessary mechanical strength and density. With the introduction of ethyl clinker and binder, more than 6% of the product softens during firing and eventually loses strength.

Prepare a few of them, which are listed in Table. B

Samples are made from the indicated compositions by the method of semi-dry pressing. The firing temperature is 1420 ° C. During the research, the most optimal ratios of the components of the charge were identified and the fsiko-mechanical properties of the samples were determined. For comparison, they are also manufactured and determined

85

83 9

five . four

five

Sulfite yeast brew concentrate

Liquid glass (over 100%)

Proposed

21.4

22,8

properties of samples from well-known scientists, which also burn at 1420 ° C.

In tab. 2 shows the properties of samples from the proposed and well-known ShIHt.

As follows from the table. 2, the technical properties of the samples are not only not inferior to the properties of the short-circuit samples of the known charge, but surpass them in apparent strength, burning porosity and mechanical strength.

The proposed product is supposed to be used for the manufacture of metering devices that are less tightened when casting steel on a continuous casting machine with a high content of aluminum instead of the more expensive zircon and zirconographite products currently used.

The use of the proposed charge will allow to obtain an optical effect only by reducing the cost of dknasovyh dosing products in comparison with the used zircon and zirconographite products at the Krasnoarmeysky dyas plant in the amount of about 200 thousand rubles. in year.

Table 1

97 3

87

91

one

2

four

b

18

table 2

1.92

371

, 86

386

26.0

Claims (3)

vr Claim of the Invention A mixture for the manufacture of an oh-oporots, including crystalline quartzite, slag and a link, characterized in that in order to increase the density and mechanical strength, it contains ethyl silicate as a binder and additionally a sulphite-alcohol brewer with the following ratio of components % by weight: Crystal quartzite83-91 Slag1-9 1.76 253 Ethyl silicate Concentrate of sulfite alcohol brewing Sources of information taken into consideration at exploring 1. USSR author's certificate N 532591,. From 04 to 35/14, 1975. 2. USSR author's certificate N 607824,. From 04 to 35/14, 1976. 3. Authors certificate of USSR WG 411738,. From 04 to 35/14, 1971. (prototype).