SU1495619A1 - Refractory pillar - Google Patents

Abstract

The invention relates to ceramics, in particular, to the manufacture of the installation fire box — a rack used in watered roasting of porcelain products in high-speed furnaces. The goal is to increase the turnaround of the racks, reduce the consumption of materials for the fireproofing, refractory plates, and simplify the installation of the stack cars. The fireproof pillar is made of two parts 1 with figured locking grooves 2 connected by the figure lock 3 to form a gap 4 filled with a thermoplastic material. 2 Il.

Description

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The invention relates to the technology of ceramic production, in particular to the process of poured roasting of porcelain products in high-speed furnaces.

The purpose of the invention is to increase the turnover of racks, refractory plates, to reduce the material consumption of fireproof materials, to simplify the installation of shelf trolleys ..

FIG. 1 shows a refractory rack, longitudinal section; in fig. 2 - the same, top view.

The refractory rack consists of two symmetrical parts 1 with figured locking grooves 2, interconnected by a figured refractory lock 3 with the formation of a gap 4 filled with a thermoplastic material, the melting point of which, depending on the firing temperature of the thermal unit, can be within 1200-1400 ° s

In the process of multiple installation of shelf cars, the loading of plates on the refractory rack is carried out in such a way that the structural points of each plate are on a separate element of the thermocompensation rack. The stress in the frame of the multi-storey stack because of the different thicknesses and the refractory plates used, the incompetence of the composition of the refractory mass used to glue the elements of posts and plates, the vertical shrinkage of the stack and the thermal expansions in three dimensions are compensated for by the gap,

on which is determined by the linear dimensions of the shelf trolley. ,

With a gap of less than 1% of the linear size of the working surface of the rack, the turnover of the racks is reduced due to insufficient compensation of stresses in the design of the stack.

With an increase in the gap of more than 5%, the stability of the multi-layered design of the trolley decreases, the mechanical strength of the skeleton of the trolley is lost,

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shafts and as a result, a decrease in turnover.

Making a refractory support stand in two parts reduces the thickness of its working part, which, in the presence of a thermal compensation gap, increases its heat resistance four times: (250-300) - 1300 ° C - water against 80-100. This increases the turnover of the rack by 2-3 times up to 250-300 turns versus 60-80 turns O when using the base object. Fixing parts of the stand with a ceramic mass allows linear thermal compensation of the stack structure and, during the operation of the trolley, fixes the adjacent plates with one rack independently of each other, which greatly facilitates the mounting of the shelf stack trolley.

The presence of a compensating gap between the lock shaped grooves and a refractory lock of 1–5% of the linear size of the working surface of the stand in the direction of the thermal stresses of the refractory plates makes it possible to compensate for temperature changes in the dimensions of the support plates of the stack trolley during firing.

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Claims (1)

Invention Formula The refractory rack of the shelf trolleys is made in the form of an I-beam, characterized in that, in order to increase the turnover, reduce the material intensity of the fire-fighting equipment, simplify installation, it is made in the form of two symmetrical parts filled with thermoplastic relaxation material and equal to 1-5 ° / o of the linear size of the working surface of the rack in the direction of the thermal stresses of the refractory plates.