阅读说明：本技术 一种由耐火材料制成的2500℃钨钼烧结炉用方形炉芯 (Square furnace core made of refractory material and used for 2500 ℃ tungsten-molybdenum sintering furnace ) 是由 邢朋娟 刘艳 惠圆圆 严磊 但振坤 于 2019-10-15 设计创作，主要内容包括：本发明公开了一种由耐火材料制成的2500℃钨钼烧结炉用方形炉芯,包括由耐火材料制成的外层炉芯和内层炉芯,其中内层炉芯填充于外层炉芯内部,所述内层炉芯中心位置设有上下贯通的通气孔,其中外层炉芯和内层炉芯的横截面均为方形,所述外层炉芯和内层炉芯之间设有膨胀缝,其中膨胀缝的范围为0.2~5mm,本发明炉芯是方形结构,相应的炉衬也是方形结构,这种结构可以使被烧结钨钼板坯制品水平放置在炉芯上侧的底托上,其中方形炉芯顶部与底托顶部齐平,最大限度改善了被烧结钨钼板坯制品的弯曲变形,大幅度减少钨钼制品的校直校平工序,降低生产成本,同时避免校型过程中的加热及压力加工对制品质量的影响。(The invention discloses a square furnace core for a 2500 ℃ tungsten-molybdenum sintering furnace made of refractory materials, which comprises an outer layer furnace core and an inner layer furnace core made of refractory materials, wherein the inner layer furnace core is filled in the outer layer furnace core, the center of the inner layer furnace core is provided with a through vent hole, the cross sections of the outer layer furnace core and the inner layer furnace core are both square, an expansion gap is arranged between the outer layer furnace core and the inner layer furnace core, the range of the expansion gap is 0.2 ~ 5mm, the furnace core is of a square structure, and a corresponding furnace lining is also of a square structure, so that a sintered tungsten-molybdenum plate blank product can be horizontally placed on a bottom support on the upper side of the furnace core, the top of the square furnace core is flush with the top of the bottom support, the bending deformation of the sintered tungsten-molybdenum plate blank product is improved to the maximum extent, the straightening and leveling procedures of the tungsten-molybdenum product are greatly reduced, the production cost is reduced, and the influence of heating and pressure processing in the shape correcting process on the quality of the.)

1. The square furnace core for the 2500 ℃ tungsten-molybdenum sintering furnace is characterized by comprising an outer layer furnace core (1) and an inner layer furnace core (2) which are made of refractory materials, wherein the inner layer furnace core (2) is filled in the outer layer furnace core (1), a through vent hole (3) is formed in the center of the inner layer furnace core (2), the cross sections of the outer layer furnace core (1) and the inner layer furnace core (2) are square, an expansion gap is formed between the outer layer furnace core (1) and the inner layer furnace core (2), and the range of the expansion gap is 0.2 ~ 5 mm.

2. The square furnace core made of refractory material for the 2500 ℃ tungsten-molybdenum sintering furnace according to claim 1, is characterized in that: outer wick (1) is built by outer top layer brick (4), outer upper brick (5), outer middle level brick (6) and outer bottom brick (7) and forms, wherein outer middle level brick of multilayer (6) build in outer bottom brick (7) up end, wherein outer upper brick (5) build in outer middle level brick of multilayer (6) top, wherein outer top layer brick (4) build in outer upper brick (5) up end.

3. The square furnace core made of refractory material for the 2500 ℃ tungsten-molybdenum sintering furnace according to claim 2, is characterized in that: the outer-layer top layer brick (4) comprises a square outer-layer top layer brick and a corner outer-layer top layer brick, wherein the outer-layer upper layer brick (5) comprises a square outer-layer upper layer brick and a corner outer-layer upper layer brick, the outer layer middle layer brick (6) comprises a square outer layer middle layer brick and a corner outer layer middle layer brick, wherein the outer bottom layer bricks (7) comprise square outer bottom layer bricks and corner outer bottom layer bricks, the square outer top layer bricks, the square outer upper layer bricks, the square outer middle layer bricks and the square outer bottom layer bricks are used for building four edges of the outer furnace core (1), wherein the corner outer layer top layer brick, the corner outer layer upper layer brick, the corner outer layer middle layer brick and the corner outer layer bottom layer brick are used for building four corners of the outer layer furnace core (1), wherein the inner layer furnace core (2) is filled in the outer layer furnace core (1) which is built by outer layer top layer bricks (4), outer layer upper layer bricks (5), outer layer middle layer bricks (6) and outer layer bottom layer bricks (7).

4. The square furnace core for the 2500 ℃ tungsten-molybdenum sintering furnace made of refractory materials is characterized in that the inner furnace core (2) is built by core bricks (8), wherein the core bricks (8) are of a cubic or rectangular structure, the core bricks (8) are flatly laid and built on the inner side of the outer furnace core (1), and the expansion gap between two adjacent core bricks (8) ranges from 0.2 ~ 5 mm.

5. The square furnace core for the 2500 ℃ tungsten-molybdenum sintering furnace made of refractory material is characterized in that the lower end surface of the outer layer top layer brick (4) is provided with a convex spigot (9), wherein the convex spigot (9) of the outer layer top layer brick (4) is matched with the upper end surface of the outer layer upper layer brick (5), the lower side of one end surface of the outer layer top layer brick (4) close to the inner layer furnace core (2) is provided with a connecting groove (12), the height of the connecting groove (12) is the same as the thickness of the core brick (8), the connecting groove (12) is used for being connected with the core brick (8), and the size of an expansion joint between the connecting groove (12) and the core brick (8) is 0.2 ~ 5 mm.

6. The square furnace core for the 2500 ℃ tungsten-molybdenum sintering furnace made of refractory materials is characterized in that a concave spigot (10) is arranged on the upper end face of an outer layer upper layer brick (5), a convex spigot (9) is also arranged on the lower end face of the outer layer upper layer brick (5), a connecting groove (12) is also arranged on the lower side of one end face, close to an inner layer furnace core (2), of the outer layer upper layer brick (5), the height of the connecting groove (12) is the same as the thickness of the core brick (8), the connecting groove (12) is used for being connected with the core brick (8), the size of an expansion gap between the connecting groove (12) and the core brick (8) is 0.2 ~ mm, a slope (11) is arranged on one end face, far away from the inner layer furnace core (2), the included angle between the slope (11) and the horizontal plane is 50 ~ degrees, the size of the upper end of the outer layer upper layer brick (5) is smaller than that of the lower end face of the outer layer upper layer brick (5), the concave spigot (10) of the outer layer upper layer brick (5) is matched with the size of the convex spigot (9) of a top layer brick (4), and the convex spigot (5) is matched with the size of the convex spigot (2), and the size of the convex spigot (5) is 0.2).

7. The square furnace core for the 2500 ℃ tungsten-molybdenum sintering furnace made of refractory material is characterized in that a concave spigot (10) is arranged on the upper end face of the outer middle layer brick (6), a convex spigot (9) is also arranged on the lower end face of the outer middle layer brick (6), a connecting groove (12) is also arranged on the lower side of one end face of the outer middle layer brick (6) close to the inner furnace core (2), wherein the height of the connecting groove (12) is the same as the thickness of the core brick (8), the connecting groove (12) is used for being connected with the core brick (8), the size of an expansion gap between the connecting groove (12) and the core brick (8) is 0.2 ~ mm, the outer middle layer bricks (6) are made into a plurality of layers through matching of the concave spigot (10) and the convex spigot (9), the concave spigot (10) of the outer middle layer brick (6) is matched with the convex spigot (9) of the upper layer brick (5), the concave spigot (9) of the outer middle layer brick (6) is matched with the convex spigot (7) of the bottom layer brick (84 mm, and the convex spigot (84) is matched with the convex spigot (2).

8. The square furnace core for the 2500 ℃ tungsten-molybdenum sintering furnace made of refractory materials is characterized in that a concave spigot (10) is arranged on the upper end face of the outer bottom layer brick (7), a connecting groove (12) is also arranged on the lower side of one end face, close to the inner furnace core (2), of the outer bottom layer brick (7), the height of the connecting groove (12) is the same as the thickness of the core brick (8), the connecting groove (12) is used for being connected with the core brick (8), the size of an expansion gap between the connecting groove (12) and the core brick (8) is 0.2 ~ 5mm, and the concave spigot (10) of the outer bottom layer brick (7) is matched with the convex spigot (9) of the lowest layer of the multilayer outer middle layer brick (6).

9. The square core for a 2500 ℃ tungsten-molybdenum sintering furnace made of refractory material according to claim 8, characterized in that the weight of each of said outer top bricks (4), outer top bricks (5), outer middle bricks (6), outer bottom bricks (7) and core bricks (8) is in the range of 5 ~ 15kg, wherein the outer top bricks (4) and outer top bricks (5) are made of zirconia for high temperature resistance and support, wherein the outer bottom bricks (7) are made of alumina for insulation and support, the portion of said outer middle bricks (6) near the outer top bricks (5) is made of zirconia, wherein the portion of the outer middle bricks (6) near the outer bottom bricks (7) is made of alumina, said upper half of the square core bricks (8) is made of zirconia, wherein the lower half of the square core bricks (8) is made of alumina, wherein the height of the square core made of zirconia is greater than 200mm, wherein the height of the square core made of alumina is greater than 350mm, the square core is made of alumina, the square core is a square core with a square bottom lining with a height of 600 ~ 800mm, and the square core is a square bottom lining with a bottom of 800mm, wherein the square core is flush with a bottom surface of a bottom of 800 mm.

Technical Field

The invention belongs to the technical field of tungsten and molybdenum processing equipment, and particularly relates to a square furnace core made of refractory materials and used for a 2500 ℃ tungsten and molybdenum sintering furnace.

Background

The medium frequency induction sintering furnace is important equipment used for sintering special metals such as tungsten, molybdenum and the like, the highest temperature of the currently used tungsten-molybdenum sintering furnace is 2300 ℃, and because the environment and the temperature of different parts of the sintering furnace are different, the structure of the refractory material of the furnace core is different, so that the service life of the refractory material of each part is different.

At present, the hearth of a tungsten-molybdenum sintering furnace which is conventionally used is round, and when a plate blank is sintered, the space utilization rate is low, the energy consumption is high, the efficiency is low, and the requirement for large-scale sintering of the plate blank cannot be met. In addition, in the sintering process, due to insufficient charging, the slab is easy to deform in the sintering process, so that the subsequent processing and manufacturing are inconvenient, in order to save cost, the deformed slab needs to be heated and corrected, the production cost is increased, and the quality of the product is influenced by heating and pressure processing in the correction process.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a square furnace core made of refractory materials and used for a 2500 ℃ tungsten-molybdenum sintering furnace, and overcomes the defects of the prior art that 1: the hearth of the tungsten-molybdenum sintering furnace which is conventionally used at present is round, and when a plate blank is sintered, the space utilization rate is low, the energy consumption is high, the efficiency is low, and the requirement for large-scale sintering of the plate blank cannot be met; 2: the prior sintering furnace plate blank is easy to deform in the sintering process, and is inconvenient for subsequent processing and manufacturing; 3: the deformed plate blank needs to be heated and corrected, so that the production cost is increased, and the quality of a product is influenced by heating and pressure processing in the correction process; 4: the prior art does not provide the problems of a corresponding square furnace core and the like for a square tungsten-molybdenum induction sintering furnace.

In order to solve the technical problem, the square furnace core for the 2500 ℃ tungsten-molybdenum sintering furnace made of refractory materials comprises an outer layer furnace core and an inner layer furnace core made of refractory materials, wherein the inner layer furnace core is filled in the outer layer furnace core, a through vent hole is formed in the center of the inner layer furnace core, the cross sections of the outer layer furnace core and the inner layer furnace core are square, an expansion gap is formed between the outer layer furnace core and the inner layer furnace core, and the range of the expansion gap is 0.2 ~ 5 mm.

Preferably, the outer furnace core is formed by stacking an outer layer top layer brick, an outer layer upper layer brick, an outer layer middle layer brick and an outer layer bottom layer brick, wherein the outer layer middle layer brick of a plurality of layers is stacked on the upper end surface of the outer layer bottom layer brick, the outer layer upper layer brick is stacked on the uppermost end of the outer layer middle layer brick of the plurality of layers, and the outer layer top layer brick is stacked on the upper end surface of the outer layer upper layer brick.

Preferably, outer top layer brick includes square outer top layer brick and the outer top layer brick in turning, and wherein outer top layer brick includes square outer upper layer brick and the outer upper layer brick in turning, outer middle level brick includes square outer middle level brick and the outer middle level brick in turning, and wherein outer bottom layer brick includes square outer bottom layer brick and the outer bottom layer brick in turning, square outer top layer brick, square outer upper layer brick, square outer middle level brick and the outer bottom layer brick in square are used for building four limits of outer wick, and wherein outer top layer brick in turning, the outer upper layer brick in turning, the outer middle level brick in turning and the outer bottom layer brick in turning are used for building four angles of outer wick, and wherein the inner layer wick is filled in and is built inside the outer wick that forms by outer top layer brick, outer upper layer brick, outer middle level brick and outer bottom layer brick.

Preferably, the inner-layer furnace core is formed by stacking core bricks, wherein the core bricks are in a cube or cuboid structure, the core bricks are flatly stacked on the inner side of the outer-layer furnace core, and the expansion gap between every two adjacent core bricks is 0.2 ~ 5 mm.

Preferably, the terminal surface is equipped with protruding tang under the outer top layer brick, and wherein the protruding tang and the outer upper brick up end of outer top layer brick cooperate, an end face downside that outer top layer brick is close to the inlayer stove core is equipped with the spread groove, and wherein the height of spread groove is the same with the thickness of core brick, the spread groove is used for being connected with the core brick, and wherein the size of expansion joint between spread groove and the core brick is 0.2 ~ 5 mm.

Preferably, outer upper brick up end is equipped with the concave tang, and wherein the terminal surface also is equipped with the convex tang under the outer upper brick, an terminal surface downside that outer upper brick is close to the inlayer stove core also is equipped with the spread groove, and wherein the height of spread groove is the same with the thickness of core brick, the spread groove is used for being connected with the core brick, and wherein the size of expansion joint between spread groove and the core brick is 0.2 ~ 5mm, a terminal surface that outer upper brick kept away from the inlayer stove core is equipped with the inclined plane, and wherein the contained angle between inclined plane and the horizontal plane is 50 ~ 65, and wherein outer upper brick upper end size is less than the lower extreme size, the concave tang of outer upper brick cooperates with the convex tang of outer top layer brick, and wherein the convex tang of outer upper brick cooperates with outer middle layer brick up end, and wherein the expansion joint size between concave tang and the convex tang is 0.2 ~ 5 mm.

Preferably, outer middle level brick up end is equipped with the concave tang, and wherein the terminal surface also is equipped with the convex tang under the outer middle level brick, an end face downside that outer middle level brick is close to the inlayer stove core also is equipped with the spread groove, and wherein the height of spread groove is the same with the thickness of core brick, the spread groove is used for being connected with the core brick, and wherein the size of expansion joint between spread groove and the core brick is 0.2 ~ 5mm, a plurality of outer middle level bricks cooperate through concave tang and convex tang and build the multilayer, and wherein the concave tang of the outer middle level brick the superiors of multilayer cooperates with the convex tang of outer upper level brick, the convex tang of the outer middle level brick lower floor of multilayer cooperates with outer bottom brick up end, and wherein the expansion joint size between concave tang and the convex tang is 0.2 ~ 5 mm.

Preferably, outer bottom brick up end is equipped with the concave spigot, and wherein outer bottom brick is close to the terminal surface downside of inlayer stove core and also is equipped with the spread groove, and wherein the height of spread groove is the same with the thickness of core brick, the spread groove is used for being connected with the core brick, and wherein the size of expansion joint between spread groove and the core brick is 0.2 ~ 5mm, the concave spigot of outer bottom brick cooperates with the convex spigot of the outer middle level brick lower floor of multilayer.

Preferably, the weight range of each outer layer top brick, each outer layer upper brick, each outer layer middle brick, each outer layer bottom brick and each core brick is 5 ~ 15kg, wherein the outer layer top bricks and the outer layer upper bricks are made of zirconia and are used for resisting high temperature and supporting, the outer layer bottom bricks are made of alumina and are used for insulating and supporting, the parts of the outer layer middle bricks, which are close to the outer layer upper bricks, are made of zirconia, the parts of the outer layer middle bricks, which are close to the outer layer bottom bricks, are made of alumina, the upper half core bricks are made of zirconia, the lower half core bricks are made of alumina, the height of a square furnace core made of zirconia is greater than 200mm, the height of the square furnace core made of alumina is greater than 350mm, the length of the square furnace core is 1030mm, the width of the square furnace core is 1230mm, the height of the square furnace core is 600 ~ 800mm, the square furnace core is sleeved at the bottom of the inner side of the square furnace lining, and the upper end face of the square furnace core is flush with the furnace lining at the bottom.

Compared with the prior art, the invention has the advantages that:

(1) the furnace core is of a square structure, the corresponding furnace lining is also of a square structure, and the structure can enable the sintered tungsten-molybdenum plate blank product to be horizontally placed at the top of the square furnace core, wherein the top of the square furnace core is flush with the top of a bottom support of the furnace lining, so that the bending deformation of the sintered tungsten-molybdenum plate blank product is improved to the greatest extent, the straightening and leveling procedures of the tungsten-molybdenum product are greatly reduced, the production cost is reduced, and the influence of heating and pressure processing on the product quality in the shape correcting process is avoided;

(2) the upper half part of the furnace core is made of zirconia and used for resisting high temperature and supporting, the lower half part of the furnace core is made of alumina and used for insulating and supporting, wherein the height of the square furnace core made of zirconia is greater than 200mm, the height of the square furnace core made of alumina is greater than 350mm, the service life and the utilization rate of the furnace core can be prolonged by the refractory material, the energy consumption is reduced, and the square furnace core can be used for a long time at the temperature of 2500 ℃;

(3) the outer layer furnace core of the square furnace core is built by outer layer top layer bricks, outer layer upper layer bricks, outer layer middle layer bricks and outer layer bottom layer bricks, and the inner part of the square furnace core is filled by tiling the core bricks, wherein the outer layer top layer bricks, the outer layer upper layer bricks, the outer layer middle layer bricks and the outer layer bottom layer bricks are matched through the matching of the concave rabbet and the convex rabbet, so that the energy consumption is greatly reduced;

(4) the square furnace core and the square furnace lining are matched, so that the charging utilization rate of the furnace lining is greatly increased, the energy consumption is greatly reduced compared with a vertical round structure, the capacity is increased, and the market competitiveness of the product is effectively improved.

Drawings

FIG. 1 is a schematic sectional view of a square core for a 2500 ℃ tungsten-molybdenum sintering furnace made of refractory material according to the present invention;

FIG. 2 is a schematic top view of a square core for a 2500 deg.C tungsten-molybdenum sintering furnace made of refractory material according to the present invention;

FIG. 3 is a schematic structural diagram of the upper layer of the outer layer brick of the square core for the 2500 ℃ tungsten-molybdenum sintering furnace made of refractory material according to the present invention;

FIG. 4 is a schematic top view of an upper layer brick of a corner outer layer of a square furnace core for a 2500 ℃ tungsten-molybdenum sintering furnace made of refractory material according to the present invention;

FIG. 5 is a schematic structural diagram of the outer layer bottom layer brick of the square furnace core for the 2500 ℃ tungsten-molybdenum sintering furnace made of refractory material according to the present invention;

FIG. 6 is a schematic top view of a bottom brick at the corner of a square furnace core for a 2500 ℃ tungsten-molybdenum sintering furnace made of refractory material according to the present invention;

FIG. 7 is a schematic diagram showing the use of a square core for a 2500 ℃ tungsten-molybdenum sintering furnace made of refractory material according to the present invention.

Description of reference numerals:

1-outer layer furnace core, 2-inner layer furnace core, 3-vent hole, 4-outer layer top layer brick, 5-outer layer upper layer brick, 6-outer layer middle layer brick, 7-outer layer bottom layer brick, 8-core brick, 9-convex rabbet, 10-concave rabbet, 11-inclined plane and 12-connecting groove.

Detailed Description

The following describes embodiments of the present invention with reference to examples:

it should be noted that the structures, proportions, sizes, and other elements shown in the specification are included for the purpose of understanding and reading only, and are not intended to limit the scope of the invention, which is defined by the claims, and any modifications of the structures, changes in the proportions and adjustments of the sizes, without affecting the efficacy and attainment of the same.

In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.