SU1248998A1 - Raw mixture for producing refractory articles - Google Patents

Description

The invention relates to the field of building materials and is intended for the manufacture of products from refractory concrete.

The purpose of the invention is to reduce the stiffness and cost of the mixture while ensuring the manufacture of large-sized products.

The spent catalyst for the production of synthetic rubber, containing,%: 70,., 17, SiO, S, and KjO 3, consists of minerals that react with the phosphate binder at high temperatures without forming fusible eutectics, and the presence of silicon oxide and potassium oxide allows an increase in the elasticity and mobility of the mixture, which contributes to a reduction in stiffness. The spent catalyst grains of synthetic rubber production in the initial state have a large specific surface area, which eliminates additional grinding, reduces energy costs and simplifies the technology of products.

The introduction of calcium phosphate together with the spent catalyst into the raw mix makes it possible to reduce the stiffness of the concrete mix from 360-400 to 100-150 s and to ensure such plasticity that allows it to take a given shape while maintaining solidity and uniformity of concrete, which in their consequently they contribute to an increase in the strain temperature under load.

Characteristic

Stiffness mixture, with

Deformation temperature (beginning of softening), ° С

The required specific intake pressure during the formation of the product by vibration, gf / cm.

The necessary effort in the manufacture

products by pressing,

kgf / cm

Application temperature, With Refractoriness, ° C

Example 1. 10% of an aluminochromophosphate binder is thoroughly mixed with 2% hygienist and 2% water. 60% of the spent catalyst for the production of synthetic rubber and 26% of chamotte powder are introduced into the prepared mixture. Concrete components are re-caked to obtain a homogeneous mixture, molded and thermally treated.

Example 2. 13.5% of a1m1hmochromophosphate binder is thoroughly mixed with 3.5% of calcium and pink with 4% of water. 52% of the spent catalyst for the production of synthetic rubber and 27% of chamotte powder are introduced into the prepared mixture. The concrete components are mixed until a uniform mixture is obtained, molded and thermally treated.

Example 3. 15% of an alumina chromium binder is thoroughly mixed with 5% calcium phosphate and 5% water. 45% of the spent synthetic rubber production catalyst and 30% chamotte powder are introduced into the prepared mixture. The concrete components are mixed until a uniform mixture is obtained, molded and heat treated.

The table shows the characteristics of the material made from the proposed compositions of the mixtures in the examples.

From the proposed mixture, articles with a length of up to 3 mm are molded.

Indicators by examples

115 1420

180

220 1400 1680

95 1380

180

200 1350 1680

Claims (1)

RAW MATERIAL MIXTURE FOR THE PRODUCTION OF REFRACTORY PRODUCTS, including petrochemical waste based on alumina, water and an aluminum-chromophosphate binder, characterized in that, in order to reduce the rigidity and cost of the mixture while ensuring the manufacture of large-sized products, it is used as a petrochemical waste contains a spent catalyst for the production of synthetic rubber and, in addition, chamotte and calcium phosphoric acid in the following ratio of components, wt.%: Spent Synthetic Rubber Production Catalyst 45-60 Water2-5 Alumochromophosphate binder 10-15 Chamotte 26-30 Calcium Phosphoric Acid 2-5 SU „„ 1248998