SU918686A1 - Method of manufacturing lining - Google Patents

Description

(54) METHOD OF MANUFACTURING FOOTING

I

The invention relates to the field of metallurgy, in particular to methods for producing a lining of fibrous refractory materials for thermal units, and can be used in non-ferrous and ferrous metallurgy in the production of building materials, mechanical engineering and the aviation industry.

A known method of manufacturing a lining of fibrous refractory materials, comprising stringing refractory plates on the rods of the lining frame perpendicular to its working surface and pressing the plates in the longitudinal direction of the lining frame LU.

The disadvantage of this method is that in the manufacture of the lining its working surface does not protect against erosion, which leads to a decrease in the service life of the lining, and does not seal the thermal unit, which leads to either suction

external air into the working volume of the unit, or to the removal of hot gas from the volume of the unit (depending on the mode of operation of the unit), which reduces its efficiency.

The aim of the invention is to improve the reliability of refractory plates and the tightness of the thermal unit.

This is achieved by applying a layer of liquid inorganic binder to the working and outer surfaces of the refractory plates before pressing them, and after pressing the refractory plates, the lining is dried to

IS thickening the binder, applying a second layer of liquid binder substance, dries the lining until the bond hardens (this substance, then burns the working surface of the lining before sintering the binder.

Claims (2)

The drawing shows the lining of the panel version. The lining contains a metal frame 1, the corners 2, installed on the longitudinal direction of the frame, rods 3, located parallel to the longitudinal direction of the frame, and a plate 4 of refractory fibrous material. Primer p. Lining is made for an electric resistance furnace with a convective heat exchange temperature in the working zone of the furnace from 400 to depending on the type of annealed material and the air flow rate from 10 to 20 m / s. On 3 strung plates 4, in which holes are made along the diameter, slightly exceeding the diameter of the rods 3. The plates 4 are made of high-alumina fiber with approximately equal content of aluminum oxide and silicon oxide. After the required set of plates 4 is placed on the rods x 3 between the fixed part of the frame 1 and the first movable angle 2, a layer of liquid inorganic binder BeniecTBa 0.5-1 mm thick is applied to the working and outer surfaces of the plates 4. An iamot-bauxite solution with a content of chamotte powder of 6070 wt.%, Bauxite powder of 67 wt.%, Liquid glass with a density of 1.35-1, 4 g / cm in the amount of 10-15 wt. % the rest is water. The plates 4 are pressed in the longitudinal direction of the frame 1 for 10-15% of the initial thickness of the set, the first corner 2 is fixed on the frame 1 so that it becomes stationary. Again, they string the required number of plates 4 onto the rods 3 between the first fixed corner 2 and the next moving corner 2. A layer of the same binder is applied to the working and outer surfaces of this set of plates 4, the plates are pressed into the corner 2 fixed to the frame 1, etc. The last set of plates is pressed by compressing them with the movable part of the frame 1, which is then fixed on the fixed part of the frame. The collected lining is dried in air at 15-30 seconds for 1-3 hours until the binder thickens. After that, a second layer of binder with a thickness of 0.5-1 mm is applied, the lining is dried in air for 20-24 hours before the binder is hardened, and then the working surface is burned at 900 C. The lining of the working surface of the lining can be performed after its installation on the heat unit in the process of starting the unit. The fabricated lining is a porous refractory mass framed by a metal frame, having an erosion resistant working surface with blocked air channels of fibrous refractory material due to the formation of a thin (1 to) protective coating layer on the working and external surfaces of the lining. Technical and economic efficiency with this method of lining production can be obtained by reducing the specific energy consumption, labor costs during installation and operation by increasing the productivity of the units and increasing the service life of the lining. Claim Method A method of manufacturing a lining of fibrous refractory materials for thermal units, including stringing refractory plates on the rods of the frame, perpendicular to its working surface and pressing the plates in the longitudinal direction of the frame of the lining, characterized in that, in order to improve the reliability of the refractory plates and the integrity of the lining frame, characterized in that, in order to improve the reliability of the refractory plates and the integrity of the lining frame, characterized in that, in order to improve the reliability of the refractory plates and the integrity of the lining, the frame of the lining is different because a layer of a liquid inorganic binder substance is applied onto the working and outer surfaces of the refractory plates before they are pressed; The slabs are dried in the curing until the binder thickens, the second layer of liquid binder is applied, the lining is dried until the binder is cured, and then the working surface of the lining is fired before sintering the binder. Sources of information taken into account in the examination 1. Patent STR 3854262, cl. F 23 M 5/04, published. 1974. n / jfff effifif / f effffoi yjf