CN218646046U

CN218646046U - Furnace building structure for thickening refractory material of horizontal induction furnace

Info

Publication number: CN218646046U
Application number: CN202223004534.0U
Authority: CN
Inventors: 王绪东; 卫志强; 孙羽; 刘瑞; 毛富军; 张国; 李鑫; 吴彦群; 樊甜甜
Original assignee: Shanxi Chunlei Cuprum Co ltd
Current assignee: Shanxi Chunlei Cuprum Co ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-03-17
Anticipated expiration: 2032-11-11

Abstract

The utility model relates to a power frequency induction electric furnace structure specifically is a furnace construction structure of horizontal induction electric furnace thickening refractory material. The technical problem that the service life of a furnace is influenced because the refractory material layer of the existing power frequency cored induction electric furnace is thin is solved. A furnace building structure of a horizontal induction furnace with thickened refractory materials comprises a furnace body, wherein the furnace body is divided into an upper furnace body and a lower furnace body, and linings are built on the peripheries of the inner walls of the upper furnace body and the lower furnace body; the upper furnace body lining comprises a refractory brick and an insulating brick which are built into a concentric ring shape, wherein the insulating brick is positioned outside the refractory brick and keeps a gap with the refractory brick, and the gap is filled with refractory materials; the long central lines of the refractory bricks and the insulating bricks are axially parallel to the furnace body, and the thickness directions of the refractory bricks and the insulating bricks are both radially parallel to the furnace body. The utility model discloses ingenious change the laying mode of resistant firebrick and insulating brick, under the prerequisite that does not change inside lining overall structure and size, effectively enlarged the thickness of quartz sand, effectively improved induction furnace's life.

Description

Furnace building structure for thickening refractory material of horizontal induction furnace

Technical Field

The utility model relates to a power frequency induction electric furnace structure specifically is a furnace construction structure of horizontal induction electric furnace thickening refractory material.

Background

The metal material is the foundation of modern industry, and the metal material can not be separated from the mechanical, chemical and transportation departments, and the electrical, atomic and aerospace industries, and the development of the industrial departments requires the development of metal materials with various physical properties such as high strength, high conductivity, high temperature resistance, corrosion resistance and the like, and the smelting and casting of the metal can not be separated from a furnace body. The metal smelting and casting furnace body commonly used at present is a cored power frequency induction furnace.

The industrial frequency cored induction furnace has the advantages of high heating speed, high heat efficiency, less metal burning loss, easy control of melting quality, convenient operation, good working condition and the like, and is widely applied to melting copper and copper alloy products. The service life of the furnace body depends on the service life of the lining of the inductor, and the service life of the lining depends on the refractory material layer and the furnace building mode.

Industrial frequency cored induction electric furnaces are classified into vertical type and horizontal type, wherein horizontal type furnaces are more vertical type because of facilitating cleaning, maintenance and inspection of vacuum chambers. The basic structure of the horizontal furnace is that a vacuum chamber is separated on a vertical plane and is divided into an upper furnace body and a lower furnace body (along the axial direction of the furnace body), an induction coil, an iron core and a metal melting channel are arranged in the lower furnace body, the upper furnace body is used as a movable part, and the movable part horizontally moves towards one side to expose the induction coil, the iron core and the metal melting channel.

The periphery of the inner wall of the upper furnace body is fixed with a refractory lining which has a complex shape structure, and the refractory lining mainly depends on quartz sand which is annularly arranged inside as a refractory material to play a role in fire resistance and burning resistance. After the upper furnace body and the lower furnace body are in butt joint, the induction coil, the iron core and the metal channel penetrate through the furnace lining, the size requirement is accurate, and the external size of the furnace lining can not be changed basically. The bottom stone is the center of the electric heat exchange of the furnace, the temperature of the solution in the melting channel is highest, the insulation of the induction coil cannot be damaged, and the thinnest position, namely the annular refractory material layer at the melting channel position with the thickness of only about 50-100mm, bears the scouring and erosion of the high-temperature solution on one side and the strong cooling on the other side, so the working environment is very severe. In addition, when the task of producing products is not full, the furnace is kept warm for a long time, the upper temperature and the lower temperature in the furnace are not balanced, the temperature at the bottom in the furnace is too high, the corrosion of refractory bricks is seriously fallen off, the furnace shell is reddened, and the service life of the furnace is influenced.

Disclosure of Invention

The utility model provides a furnace building structure of a horizontal induction furnace thickened refractory material, which solves the technical problems that the refractory material layer of the current power frequency cored induction furnace is thinner and the service life of the furnace is influenced.

The utility model discloses an adopt following technical scheme to realize: a furnace building structure of a horizontal induction furnace thickened refractory material comprises a furnace body, wherein the furnace body is divided into an upper furnace body and a lower furnace body, and linings are built on the inner walls of the upper furnace body and the lower furnace body; the upper furnace body lining comprises a refractory brick and an insulating brick which are built into a concentric ring shape, wherein the insulating brick is positioned outside the refractory brick and keeps a gap with the refractory brick, and the gap is filled with refractory materials; the thickness directions of the refractory bricks and the insulating bricks are laid in parallel with the radial direction of the furnace body.

In the prior art, the furnace body lining also adopts an annular structure of refractory bricks and insulating bricks, quartz sand is filled between the refractory bricks and the insulating bricks, but the refractory bricks and the insulating bricks are laid in a mode that the width direction is parallel to the radial direction of the furnace body, so that the interval between the refractory bricks and the insulating bricks is smaller; and this application changes resistant firebrick and insulating brick into thickness direction and furnace body radial direction parallel, when building the stove promptly, changes the thickness with resistant firebrick layer and insulating brick layer after through turned angle, on the basis that does not change the interior external diameter that resistant firebrick and insulating brick enclose into the loop configuration, has increaseed the interval between insulating brick and the resistant firebrick for stopping thickness between the two obviously increases, on the overall structure's of not changing the furnace body inside lining basis, has effectively improved the fire behavior of furnace body inside lining.

The utility model discloses ingenious change the laying mode of resistant firebrick and insulating brick, under the prerequisite that does not change inside lining overall structure and size, effectively enlarged the thickness of quartz sand, effectively improved induction furnace's life.

Drawings

Fig. 1 is a schematic view of the structure of the present invention (along the axial direction of the furnace body).

FIG. 2 is a schematic structural view of an induction furnace lining before and after modification. The left side is current furnace lining structure in the picture, and the right side is the utility model discloses structure after the improvement.

FIG. 3 is a schematic view of a horizontal industrial frequency induction furnace.

1-a vacuum system, 2-a rotating shaft, 3-a feeding device, 4-a melting channel, 5-an inductor, 6-a sampling and material smashing device, 7-a temperature measuring device, 8-an upper furnace body, 9-a lower furnace body, 10-refractory bricks, 11-insulating bricks and 12-quartz sand.

Detailed Description

FIG. 3 is a basic structure of a horizontal induction furnace, which comprises a vacuum system, a turnover system comprising a rotating shaft, a furnace body, an inductor, a melting channel, an observation temperature measuring device and the like, wherein the furnace body can rotate under the driving of the rotating shaft, and the inductor provides heat for the interior of the furnace body. The inductor and the melting channel are positioned on the lower furnace body, and the upper furnace body can move and is in butt joint or separation with the lower furnace body.

Example 1

As can be seen from fig. 1, 2 and 3, a furnace building structure of a horizontal induction furnace with thickened refractory material comprises a furnace body, wherein the furnace body is divided into an upper furnace body and a lower furnace body, and linings are built on the inner walls of the upper furnace body and the lower furnace body; the lining of the upper furnace body 8 comprises a refractory brick 10 and an insulating brick 11 which are built into a concentric ring shape, wherein the insulating brick 11 is positioned outside the refractory brick 10 and keeps a gap with the refractory brick 10, and quartz sand 12 is filled at the gap; the long/short central lines of the refractory bricks 10 and the insulating bricks 11 are axially parallel to the furnace body, and the thickness directions of the refractory bricks 10 and the insulating bricks 11 are both radially parallel to the furnace body.

The refractory bricks and the insulating bricks are of cuboid structures, and the thickness dimension in the thickness direction is the smallest.

As can be seen from figure 2, in the application, refractory brick and insulating brick adopt thickness direction and furnace body radial direction parallel's mode to lay, are equivalent to rotate refractory brick and insulating brick 90 degrees around its long center pin, under the prerequisite that does not change the inside and outside diameter of furnace body inside lining, have effectively increased the clearance h before refractory brick and the insulating brick, have increased the thickness to resistant burning material quartz sand, have effectively protected the furnace body structure. Moreover this kind of laying mode that this application adopted, with the thickness direction and the furnace body radial parallel who is able to bear or endure firebrick and insulating brick, the biggest face and the furnace body radial perpendicular who are equivalent to be able to bear or endure firebrick and insulating brick, consequently when spreading equal area, the structure can also save the quantity of being able to bear or endure firebrick and insulating brick.

Example 2

The refractory brick 10 and the insulating brick 11 are both a layer, the thickness of the refractory brick 10 and the thickness of the insulating brick 11 are both 63mm, and the width is at least twice of the thickness; the width of the space between the refractory brick 10 and the insulating brick 11 is 209mm.

The inner diameter of a ring enclosed by the refractory bricks 10 is 930mm, and the outer diameter of a ring enclosed by the insulating bricks 11 is 1600mm.

Under the condition of not influencing a furnace body solvent, (a horizontal round furnace) changes the laying mode of the heat-insulating bricks and the refractory bricks in the furnace, the thickness h of the quartz sand is increased from the original more than 100 millimeters to 209 millimeters, so that the thickness of the refractory material is effectively increased, and the condition of service life reduction caused by red falling of a brick furnace shell of the red copper furnace during long-term heat insulation is improved.

The construction of refractory linings for horizontal furnaces is well known in the art and a variety of processes are available.

The service life of the induction furnace is (12 months), and the furnace repair cost is calculated according to (20 ten thousand); about 1.6 ten thousand yuan is consumed per month, and 4.8-5 ten thousand yuan can be saved after about 15 months of use after change. Before not changing under long-term heat preservation state life about 10 months, compared, the utility model discloses show and improve economic benefits.

Claims

1. A furnace building structure of a horizontal induction furnace thickened refractory material comprises a furnace body, wherein the furnace body is divided into an upper furnace body and a lower furnace body, and linings are built on the inner walls of the upper furnace body and the lower furnace body; the furnace is characterized in that the lining of the upper furnace body (8) comprises a refractory brick (10) and an insulating brick (11) which are built into a concentric ring shape, wherein the insulating brick (11) is positioned outside the refractory brick (10) and keeps a gap with the refractory brick (10), and the gap is filled with refractory materials; the thickness directions of the refractory bricks (10) and the insulating bricks (11) are laid in parallel with the radial direction of the furnace body.

2. The furnace building structure of the thickened refractory material of the horizontal induction furnace according to claim 1, characterized in that the refractory bricks (10) and the insulating bricks (11) are both one layer, the thickness of the refractory bricks (10) and the thickness of the insulating bricks (11) are both 63mm, and the spacing width between the refractory bricks (10) and the insulating bricks (11) is 209mm.

3. The furnace building structure of the horizontal induction furnace thickened refractory material according to claim 2, characterized in that the inner diameter of the ring enclosed by the refractory bricks (10) is 930mm, and the outer diameter of the ring enclosed by the insulating bricks (11) is 1600mm.

4. A furnace construction structure of horizontal induction furnace thickening refractory according to any of claims 1 to 3, characterized in that said refractory is quartz sand (12).