SU732409A1 - Lining of electrolyzer for magnesium production - Google Patents

Description

one

This invention relates to the production of ectroi magnesium and molten media and is aimed at improving the lining of electrolysers.

The known lining of electrolyzers with dp of obtaining magnesium, which, in order to use mechanized methods of installation and reduce the duration of the repair, was made of a composite of concrete panels corresponding to the dimensions of the main elements of the electrolyzer, interconnected by means of grooves and projections i.

The disadvantage of this lining design is that its internal surfaces are not protected from aggressive environmental influences.

A known improved lining of electrolysis cells for the production of magnesium, which is made of multilayer panels with a porosity of concrete below 25% on the inside of the electrolyzer and with a porosity above 25% and low thermal conductivity on the outside of it.

The inner lining of the bottom and side walls of the electrolyzer is made of refractory plates that form the surface that faces the electrolyte 2.

However, the penetration of the electrolytic medium into the pores leads to the destruction of the blocks. As a result of experimental studies of the lining of electrolyzers with blocks of heat-resistant concrete, it was found that the blocks after dismantling have electrolyte penetration to a depth of 2OO mm and a width of tricin up to 2 mm.

A disadvantage of the known lining is that the inner working surface of the block of multilayer panels does not have sufficient strength and resistance to the influence of the working medium of the electrolyzer and only in combination of a monolithic block with a protective surface of the inner working surface solves the complex task,

Also known is the lining of the electrolysis cell for the production of magnesium, comprising a 3 .7 layer of heat-insulating backfill, a layer of concrete panels of heat-insulating material and an inner working layer of refractory material CPD. The installation of the lining is mechanized and accelerated in comparison with the above-described linings, since the concrete blocks and blocks of refractory piece material are prepared separately and mounted into the casing of the electrolyzer with the help of lifting mechanisms. Along with the fact that the process of installation and dismantling of the lining is mechanized, the disadvantage of the described lining is the relatively low service life due to the fact that there is no interconnection between concrete and brick blocks and during thermal expansion the brickwork is disconnected from the concrete. The purpose of the invention is to increase the service life of the lining. The goal is achieved by the fact that the inner working layer is made of a combination of rows of piece and whole concrete material, with a part of the piece elements being uniformly embedded in the whole concrete part of the inner layer. The working plane is made of combined blocks consisting of a piece and solid concrete material, and separate piece elements evenly enter the piece and whole concrete parts of the masonry. The drawing shows the proposed lining of the cell, rafez. The electrolyzer consists of internal blocks 1 having brick masonry 2 and a concrete wall 3, and the intermediate blocks 4 adjacent to them are made with cells 5 filled with heat-resistant material 6 on liquid glass, and the end joints have a surface 7. The cathodes are installed inside the electrolyzer 8, 94, anodes 9 are placed on top and nepia cover U is laid, and between the casing 11 and the intermediate block there is a heat insulating backfill 12. The electrolyzer is mounted as follows. An insulating backfill is prevented at the bottom of the casing, then intermediate blocks 4 with cells are placed, and heat insulating backfill is also placed between the casing walls and blocks 4. Then install blocks 1 with brickwork inside the electrolyzer, after which cathode, anodes and overlapping are installed. When laying a brick row of the inner working layer, a part of the clappets is embedded into the concrete wall. The proposed allows to increase the service life by 1.5-2 times, to reduce the time just for electrolyzers during the repair and construction of new ones by 8-9 times. The invention of the lining of the electrolytic cell to produce magnesium, comprising a layer of insulating backfill, a layer of concrete panels of insulating material and an inner working layer of refractory material, characterized in that, in order to increase the life of the lining, the inner working layer is made of a combination of p The elements of unit and solid concrete materials, and part of the unit elements are uniformly embedded in the integral part of the inner layer. Sources of information taken into account in the examination of 1 .. USSR author's certificate number 382746, cl. C 25 C 3/04, 1971. 2. USSR author's certificate fe 407972, cl. C 25 C 3 / O4, 1971. 3. USSR author's certificate No. 451794, cl. C 25 C 3 / O4, 1970 (prototype). J 2

Claims (1)

CLAIMS lining electrolysis for obtaining ²⁵ Nia magnesium, comprising a layer of insulating infill layer concrete panels of insulating material and an inner working layer of refractory material, characterized in ³⁰ that, in order to extend the lining life, internal working layer is made of a series combination of piece and all-concrete material, and part of the piece elements uniformly ³⁵ embedded in the whole-concrete part of the internal spout.