CN212806498U

CN212806498U - Furnace barrel of electric smelting furnace for producing macrocrystalline fused magnesia ore

Info

Publication number: CN212806498U
Application number: CN202020539675.4U
Authority: CN
Inventors: 章荣会
Original assignee: Xiuyan Manzu Autonomous County Hengrui Magnesium Products Co ltd
Current assignee: Xiuyan Manzu Autonomous County Hengrui Magnesium Products Co ltd
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2021-03-26
Anticipated expiration: 2030-04-13

Abstract

The utility model provides a hot stove section of thick bamboo of electric smelting magnesite ore deposit of production macrocrystal, it has the stove section of thick bamboo body of one deck magnesite cement coating to cover including the inner wall, the magnesite cement coating is fixed through stove section of thick bamboo body inner wall welded metal anchor assembly, and its thickness is 20 ~ 100mm, the magnesite cement coating is the mud cream that light-burned magnesia powder and water or brine (magnesium chloride) solution were prepared, and the adoption is paintd, is beaten or the spraying construction is fixed. Adopt the utility model provides a hot stove section of thick bamboo of production macrocrystal electric smelting magnesia ore deposit, the high temperature furnace charge that the splash caused in smelting production process can not burn the section of thick bamboo wall again, avoids taking place to drip the stove accident, even if there is high temperature furnace charge to run to the section of thick bamboo wall, the magnesite cement coating on the section of thick bamboo wall also can block the furnace charge immediately and flow. After smelting in one furnace, all or most of the magnesite cement coating on the cylinder wall is dehydrated and pulverized, and cylinder removal is convenient.

Description

Furnace barrel of electric smelting furnace for producing macrocrystalline fused magnesia ore

Technical Field

The utility model relates to a macrocrystal fused magnesia production facility especially relates to a hot stove section of thick bamboo in production macrocrystal fused magnesia ore deposit.

Background

The submerged arc furnace for smelting the macrocrystalline fused magnesia mainly comprises a furnace barrel, a furnace bottom rail trolley, electrodes, a feeding device and the like, wherein the furnace barrel is generally a cylinder with the diameter of 1.3-2.0 m and the height of 4-6 m and is formed by welding steel plate winding drums with the thickness of 5-8 mm.

The large-crystal fused magnesia is generally produced by utilizing low-price electricity at night, a furnace barrel is placed on a rail trolley at the bottom of the furnace, three electrodes extend into the furnace barrel, a feeding device feeds materials into the furnace barrel, and after smelting at night, the furnace barrel is filled with smelted furnace materials. And then the furnace cylinder together with the furnace bottom rail trolley is pushed to a cooling station in the workshop and is naturally cooled for about one week. After cooling, the furnace burden shrinks, the furnace cylinder is lifted by the overhead crane to be dismantled and put into the next round for recycling.

In the smelting process, the electrode triangular area in the middle of the furnace cylinder and the furnace burden around the electrode triangular area are continuously melted, the temperature of the melted furnace burden is up to more than 3000 ℃ (the melting point of magnesium oxide is 2800 ℃), and the furnace burden in the peripheral area far away from the triangular area and close to the inner wall of the furnace cylinder is not melted and keeps at a lower temperature, so that the furnace burden in the furnace cylinder can be well kept stable by the steel plate furnace cylinder.

However, gas overflow is not smooth in the electric melting process, so that furnace burden splashing (similar to volcanic explosion) in a triangular area is caused, a furnace burden accumulation structure around the inner wall of the furnace cylinder is damaged, splashed high-temperature furnace burden or a small amount of liquid penetrates through the furnace burden around the inner wall and further contacts the furnace cylinder steel plate, the furnace cylinder steel plate is immediately melted and perforated, and part of the furnace burden flows out. If the perforation is not large, the operation worker can properly spray water for cooling, and the production can be continued. However, if the range of the through hole is large, the furnace burden flows more, and further, a melting opening of a furnace cylinder steel plate on the furnace burden flowing path is caused, so that serious furnace flowing accidents are evolved, and the high-temperature liquid furnace burden in the whole furnace cylinder can flow out, so that equipment is burnt, the furnace burden is scrapped, and even casualties are caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hot stove section of thick bamboo of electric smelting magnesia ore deposit of production macrocrystal has solved at present in smelting process, thereby the stove section of thick bamboo easily burns and wears the problem that leads to trickling the stove accident, its technical scheme as follows:

the utility model provides a production heavy crystallization electric smelting magnesite hot furnace stove section of thick bamboo, includes that the inner wall covers has the stove section of thick bamboo body of one deck magnesite cement coating, magnesite cement coating fixes through stove section of thick bamboo body inner wall welded metal anchor assembly, and its thickness is 20 ~ 100mm, magnesite cement coating is the mud cream that light burned magnesia powder and water or brine (magnesium chloride) solution were prepared, adopts to paint the construction fixed.

Besides the coating construction and fixation, the magnesite cement coating can also be constructed and fixed by ramming or spraying.

The metal anchoring piece is a tortoise-shell net or V-shaped, T-shaped or S-shaped anchoring piece, and the thickness of the magnesite cement coating inserted into the anchoring piece is 1/3-1/2 of the thickness of the magnesite cement coating.

The mesh of the tortoise shell net is 30-100 mm, and the thickness of the tortoise shell net is 10-50 mm.

The outer wall from the top down of stove section of thick bamboo body is even or inhomogeneous sets up sloted steel ring, and the interval of adjacent sloted steel ring is 0.6 ~ 2 m.

The distance between the channel steel rings at the upper end and the lower end of the furnace cylinder body and the end of the furnace cylinder body is 50-200 mm.

And reinforcing rib plates are arranged between adjacent channel steel rings, and the number of the reinforcing rib plates is 6-16.

The reinforcing rib plates are welded on the outer wall of the furnace barrel body along the vertical direction, and the upper ends and the lower ends of the reinforcing rib plates are welded on the channel steel rings.

The reinforcing rib plate is made of strip steel plates.

After the furnace cylinder of the electric smelting furnace for producing large-crystal fused magnesia is smelted in one furnace, all or most of magnesite cement coatings on the cylinder wall are dehydrated and pulverized, and the cylinder is convenient to remove.

The furnace cylinder of the electric smelting furnace for producing macrocrystalline fused magnesia can avoid furnace flowing accidents caused by burning-through, and creates conditions for automation and no humanization of macrocrystalline fused magnesia smelting production.

Drawings

FIG. 1 is a schematic view of the arrangement of a tortoise-shell net for producing a large-crystal fused magnesia ore furnace shell;

FIG. 2 is a schematic view of an external reinforcing structure of the furnace cylinder of the electric smelting furnace for producing large-crystal fused magnesite.

The reference numbers in the figures are as follows:

1-furnace cylinder body; 2-steel ring groove; 3-reinforcing rib plate; 4-tortoise shell net.

Detailed Description

The utility model provides a furnace barrel of a large-crystal electric smelting magnesia ore furnace, which can avoid the furnace barrel from being burnt through and leading to the occurrence of furnace flowing accidents. The furnace cylinder for producing the large-crystal electric melting magnesia ore heating furnace comprises a steel furnace cylinder body 1, wherein the furnace cylinder body 1 is a cylinder with the diameter of 1.3-2.0 m and the height of 4-6 m and is formed by welding steel plate winding drums with the thickness of 5-8 mm.

As shown in figure 1, the inner wall of the furnace cylinder body 1 is covered with a magnesite cement coating with the total thickness of 20-100 mm, and the magnesite cement coating needs to be effectively fixed on the inner wall of the furnace cylinder body 1 and can be fixed through a metal anchoring part welded on the inner wall of the furnace cylinder body 1.

The metal anchoring piece can be a V-shaped, T-shaped or S-shaped anchoring piece commonly used for anchoring refractory materials, and the depth of the metal anchoring piece inserted into the magnesite cement coating is 2/3-1/2 of the thickness of the coating.

The magnesite cement coating is made of mud paste prepared from light-burned magnesia powder and water or brine (magnesium chloride) solution and is fixed by a smearing or ramming or spraying construction method.

The metal anchoring piece can be a tortoise shell net, wherein meshes of the tortoise shell net are 30-100 mm, and the thickness of the tortoise shell net is 10-50 mm. After the furnace cylinder body 1 is fixedly connected with the magnesite cement coating through the anchoring piece or the tortoise shell net, the coating can be effectively prevented from falling off.

As shown in fig. 2, in order to further prevent the furnace tube body 1 from being deformed by heat, a channel ring 2 and a reinforcing rib plate 3 for reinforcement may be provided outside the furnace tube body 1.

A plurality of steel ring grooves 2 are uniformly or non-uniformly distributed on the outer part of the furnace cylinder body 1 from top to bottom, and the steel ring grooves 2 can be welded on the furnace cylinder body 1 and can also be fastened on the furnace cylinder body 1 by bolts and the like.

The interval of adjacent groove steel ring 2 is 0.6 ~ 2m, and the channel-section steel ring that is located 1 top of a stove section of thick bamboo body is apart from 50 ~ 200mm with the upper end of a stove section of thick bamboo body 1, and the channel-section steel ring that is located 1 bottom of a stove section of thick bamboo body is apart from 50 ~ 200mm with the lower end of a stove section of thick bamboo body 1.

Reinforcing rib plates 3 can be arranged between the adjacent channel steel rings 2, the number of the reinforcing rib plates is 6-16, and the reinforcing rib plates 3 are uniformly or non-uniformly distributed along the circumference of the furnace barrel body 1.

The reinforcing rib plate 3 is made of strip steel plate and is longitudinally welded on the outer wall of the furnace barrel body 1. And two ends of the reinforcing rib plate 3 are welded on the channel steel ring or not welded on the channel steel ring.

The utility model provides an in certain embodiment, stove section of thick bamboo body 1 adopts the steel sheet reel welding of 6mm thickness to form, and its diameter is 1.5m, highly is 6 m.

The inner wall of the furnace barrel body 1 is welded with a tortoise shell net with the hole pitch of 50mm and the thickness of 15mm, and a magnesite cement coating with the total thickness not less than 30mm is fixed through the tortoise shell net.

The magnesite cement coating is formed by filling paste prepared from light-burned magnesia powder and water into tortoise shell meshes and completely covering the tortoise shell meshes in a manual smearing mode.

The outer wall of the furnace barrel body 1 is provided with 5 uniformly-arranged channel steel rings for reinforcement, the distance between every two adjacent channel steel rings is the same, the middle channel steel ring is located in the middle of the furnace barrel body 1, and 8 reinforcing rib plates 3 are uniformly welded between every two adjacent channel steel rings 2.

Adopt the utility model provides a when the hot stove section of thick bamboo of production macrocrystal fused magnesia ore deposit smelts production, the high temperature furnace charge that the splash caused among the smelting process can not burn the section of thick bamboo wall again, therefore has avoided taking place to drip the stove accident. Even if high-temperature furnace charge runs to the cylinder wall, the magnesite cement coating on the cylinder wall can also immediately block the furnace charge from flowing out.

Adopt the utility model provides a production large crystallization electric smelting magnesite ore heat furnace stove section of thick bamboo is through a stove smelting back, and the magnesite cement coating on the section of thick bamboo wall is whole or most material dehydration pulverization, takes off a section of thick bamboo convenience.

The utility model can avoid furnace dropping accidents in the process of producing macrocrystalline fused magnesia, and creates conditions for automation and no humanization of macrocrystalline fused magnesia smelting production.

Claims

1. The utility model provides a production large crystallization electric smelting magnesite ore furnace stove section of thick bamboo which characterized in that: the furnace barrel comprises a furnace barrel body, wherein the inner wall of the furnace barrel body is covered with a magnesite cement coating, the magnesite cement coating is fixed through a metal anchoring part welded on the inner wall of the furnace barrel body, the thickness of the furnace barrel body is 20-100 mm, and the magnesite cement coating is fixed by smearing construction.

2. The furnace shell of the submerged arc furnace for producing large-crystal fused magnesite according to claim 1, wherein: besides the coating construction and fixation, the magnesite cement coating can also be constructed and fixed by ramming or spraying.

3. The furnace shell of the submerged arc furnace for producing large-crystal fused magnesite according to claim 1, wherein: the metal anchoring piece is a tortoise-shell net or V-shaped, T-shaped or S-shaped anchoring piece, and the thickness of the magnesite cement coating inserted into the anchoring piece is 1/3-1/2 of the thickness of the magnesite cement coating.

4. The furnace shell of the submerged arc furnace for producing large-crystal fused magnesite according to claim 3, wherein: the mesh of the tortoise shell net is 30-100 mm, and the thickness of the tortoise shell net is 10-50 mm.

5. The furnace shell of the submerged arc furnace for producing large-crystal fused magnesite according to claim 1, wherein: the outer wall from the top down of stove section of thick bamboo body is even or inhomogeneous sets up sloted steel ring, and the interval of adjacent sloted steel ring is 0.6 ~ 2 m.

6. The furnace shell of the submerged arc furnace for producing large-crystal fused magnesite according to claim 5, wherein: the distance between the channel steel rings at the upper end and the lower end of the furnace cylinder body and the end of the furnace cylinder body is 50-200 mm.

7. The furnace shell of the submerged arc furnace for producing large-crystal fused magnesite according to claim 5, wherein: and reinforcing rib plates are arranged between adjacent channel steel rings, and the number of the reinforcing rib plates is 6-16.

8. The furnace shell of the submerged arc furnace for producing large-crystal fused magnesite according to claim 7, wherein: the reinforcing rib plates are welded on the outer wall of the furnace barrel body along the vertical direction, and the upper ends and the lower ends of the reinforcing rib plates are welded on the channel steel rings.

9. The furnace shell of the submerged arc furnace for producing large-crystal fused magnesite according to claim 7, wherein: the reinforcing rib plate is made of strip steel plates.