阅读说明：本技术 熔窑鼠洞的修补方法 (Method for repairing rat hole of melting furnace ) 是由 曾玉立 龙冬瑶 许检荣 于 2020-06-24 设计创作，主要内容包括：本发明公开一种熔窑鼠洞的修补方法,包括：对照熔窑鼠洞的形状裁切一块核心砖,核心砖略小于熔窑鼠洞；将核心砖悬挂吊入熔窑鼠洞内,核心砖与熔窑鼠洞之间形成填充间隙；采用骨架料对填充间隙进行填充；采用热补料对骨架料之间的缝隙进行填充,并将热补料捣实、规整；维持核心砖的悬吊状态,观察热补料粘结情况,若热补料粘结完整且修补部位不再发红,方可将核心砖上的悬挂部件拆除。本发明的修补方法,相对于现有技术中的直接用热补料填充,可以避免大量热补料掉入窑内,污染玻璃液,影响玻璃产品质量。(The invention discloses a method for repairing a mousehole of a melting furnace, which comprises the following steps: cutting a core brick according to the shape of the mousehole of the melting furnace, wherein the core brick is slightly smaller than the mousehole of the melting furnace; suspending the core brick into a mousehole of the melting furnace, and forming a filling gap between the core brick and the mousehole of the melting furnace; filling the filling gap by adopting a framework material; filling gaps among the framework materials by adopting hot-filling materials, and tamping and regulating the hot-filling materials; and maintaining the suspension state of the core brick, observing the bonding condition of the hot patching material, and removing the suspension part on the core brick if the bonding of the hot patching material is complete and the repaired part is not red any more. Compared with the method for directly filling the hot-melt adhesive in the prior art, the repairing method can avoid the phenomenon that a large amount of hot-melt adhesive falls into a kiln to pollute molten glass and influence the quality of a glass product.)

1. A method for repairing a mousehole of a melting furnace is characterized by comprising the following steps:

cutting a core brick according to the shape of the mousehole of the melting furnace, wherein the core brick is slightly smaller than the mousehole of the melting furnace;

hanging the core brick into the mousehole of the melting furnace in a hanging manner, wherein a filling gap is formed between the core brick and the mousehole of the melting furnace;

filling the filling gap with a framework material;

filling gaps among the framework materials by adopting hot-filling materials, and tamping and regulating the hot-filling materials;

and maintaining the suspended state of the core brick, observing the bonding condition of the hot patching materials, and removing the suspended parts on the core brick if the bonding of the hot patching materials is complete and the repaired part does not turn red any more.

2. The method for repairing a mousehole in a melting furnace according to claim 1, wherein a hanging ring for hanging is provided on the top of the core brick.

3. The method for repairing a mousehole in a melting furnace according to claim 1, wherein the core brick comprises a zero expansion silica brick having a linear expansion coefficient α of 0.2%/C or less at a temperature of 1000 ℃.

4. The method for repairing a mousehole in a melting furnace according to claim 3, wherein the components of the zero expansion silica brick based on oxides comprise, in mass percent: SiO2 is more than or equal to 99 percent, Al2O3 is less than or equal to 0.3 percent, and Fe2O3 is less than or equal to 0.1 percent.

5. The method for repairing a mousehole in a melting furnace according to claim 1, wherein the framework material comprises fire-resistant rope, fire-resistant ball, fire-resistant arc brick, or the like.

6. The method for repairing a mousehole of a melting furnace according to claim 5, wherein the refractory rope is a polysilicon rope, and the polysilicon rope comprises the following components in percentage by mass on the basis of oxides: more than or equal to 98.5 percent of SiO2, less than or equal to 0.5 percent of Al2O3, less than or equal to 0.3 percent of CaO, less than or equal to 0.4 percent of MgO, and less than or equal to 0.3 percent of Na 2O.

7. The method for repairing a mousehole of a melting furnace according to claim 1, wherein the hot-patch comprises a siliceous hot-patch in the form of a mud.

8. The method for repairing a mousehole in a melting furnace according to claim 7, further comprising, before the step of filling the gap between said framework materials with a hot-melt adhesive, the steps of: mixing and stirring the siliceous powder material and industrial phosphoric acid to prepare the siliceous heat supplementing material.

9. The method for repairing a mousehole of a melting furnace according to claim 8, wherein the mass ratio of the siliceous powder material to the industrial phosphoric acid is 4-3: 1, wherein the mass concentration of the industrial phosphoric acid is 85%.

10. The method for repairing a mousehole of a melting furnace according to claim 8, wherein the siliceous powder material comprises, in terms of mass percent on an oxide basis: SiO2 is more than or equal to 95 percent.

Technical Field

The invention relates to the field of glass melting furnaces, in particular to a method for repairing a mousehole of a melting furnace.

Background

Float glass furnaces, which are important components of glass production, are approximately 8 years old. In the using process, the refractory material at the top of the melting furnace is eroded by high-temperature flame and smoke in the melting furnace for a long time, and the phenomena of burning-through and fire penetration of the refractory material are generated locally to form a 'rat hole'. A large amount of heat can be transmitted out of the mousehole of the melting furnace, so that the environmental temperature is increased and energy is wasted, meanwhile, if the mousehole is not repaired in time, burning loss is gradually enlarged, arch bricks fall off, and the collapse of the arch top can be caused in serious cases.

At present, in the process of repairing a glass melting furnace, hot patching materials are generally directly adopted to fill rat holes. When the method is faced with the situation of burning through a large rat hole, a large amount of hot supplementary materials fall into the kiln to pollute the glass liquid, thereby affecting the quality of glass products. Therefore, in the face of burning through a large rat hole, a new repairing method is needed to reduce the pollution of hot patching materials to a melting furnace during repairing and improve the repairing quality.

Disclosure of Invention

The invention mainly aims to provide a method for repairing a mousehole of a melting furnace, aiming at reducing the pollution of hot patching materials to the melting furnace and improving the repairing quality when repairing a larger mousehole.

The invention provides a method for repairing a mousehole of a melting furnace, which comprises the following steps:

cutting a core brick according to the shape of the mousehole of the melting furnace, wherein the core brick is slightly smaller than the mousehole of the melting furnace;

hanging the core brick into the mousehole of the melting furnace in a hanging manner, wherein a filling gap is formed between the core brick and the mousehole of the melting furnace;

filling the filling gap with a framework material;

filling gaps among the framework materials by adopting hot-filling materials, and tamping and regulating the hot-filling materials;

and maintaining the suspended state of the core brick, observing the bonding condition of the hot patching materials, and removing the suspended parts on the core brick if the bonding of the hot patching materials is complete and the repaired part does not turn red any more.

Optionally, the top of the core brick is provided with a hanging ring for hanging.

Optionally, the core brick comprises a zero expansion silica brick having a linear expansion coefficient α of 0.2%/DEG C or less at a temperature of 1000 ℃.

Optionally, the zero expansion silica brick comprises the following components in percentage by mass on the basis of oxides: SiO2 is more than or equal to 99 percent, Al2O3 is less than or equal to 0.3 percent, and Fe2O3 is less than or equal to 0.1 percent.

Optionally, the skeleton material comprises a fire-resistant rope, a fire-resistant ball, a fire-resistant arc brick and the like.

Optionally, the fire-resistant rope is a polysilicon rope, and the polysilicon rope comprises the following components in percentage by mass based on oxides: more than or equal to 98.5 percent of SiO2, less than or equal to 0.5 percent of Al2O3, less than or equal to 0.3 percent of CaO, less than or equal to 0.4 percent of MgO, and less than or equal to 0.3 percent of Na 2O.

Optionally, the hot feed comprises a siliceous hot feed, the siliceous hot feed being in the form of a puree.

Optionally, before the step of filling the gap between the framework materials with hot-feed material, the method further comprises: mixing and stirring the siliceous powder material and industrial phosphoric acid to prepare the siliceous heat supplementing material.

Optionally, the mass ratio of the siliceous powder material to the industrial phosphoric acid is 4-3: 1, wherein the mass concentration of the industrial phosphoric acid is 85%.

Optionally, the siliceous powder material includes, in terms of mass percentage based on oxides: SiO2 is more than or equal to 95 percent.

According to the invention, aiming at a larger mouse hole of the melting furnace, firstly, a core brick is adopted to carry out coarse filling on the mouse hole of the melting furnace, the main space of the mouse hole of the melting furnace is filled, then, a framework material is used to carry out fine filling on a filling gap between the core brick and the mouse hole of the melting furnace, the main space of the filling gap is filled, and finally, a gap between the framework materials is further filled and sealed by a hot patching material. Compared with the prior art in which the hot patching material is directly used for filling, the patching method can avoid the phenomenon that a large amount of hot patching material falls into a kiln to pollute molten glass and influence the quality of a glass product. When the repairing method is used for repairing a larger mouse hole of the melting furnace, the hot patching material cannot pollute the melting furnace, the quality of the molten glass in the melting furnace is ensured, and the repairing quality is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures or procedures shown in the drawings without creative efforts.

FIG. 1 is a schematic flow chart of a method for repairing a mousehole of a melting furnace according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of another embodiment of the repairing method of the mousehole of the melting furnace of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides a method for repairing a mousehole of a melting furnace, which is suitable for repairing the mousehole of the melting furnace with larger size.

In an embodiment of the present invention, the method for repairing a mousehole of a melting furnace includes:

s1, cutting a core brick according to the shape of the mousehole of the melting furnace, wherein the core brick is slightly smaller than the mousehole of the melting furnace;

s2, hanging the core brick into the mousehole of the melting furnace, and forming a filling gap between the core brick and the mousehole of the melting furnace;

s3, filling the filling gap by adopting a framework material;

s4, filling gaps among the framework materials by adopting hot filling materials, and tamping and regulating the hot filling materials;

and S5, maintaining the suspension state of the core brick, observing the bonding condition of the hot patching material, and removing the suspension component on the core brick if the bonding of the hot patching material is complete and the repaired part is not red any more.

Preferably, a core brick which is matched with the shape of the mousehole of the melting furnace is cut according to the shape of the mousehole of the melting furnace, and the size of the core brick is slightly smaller than that of the mousehole of the melting furnace, so that a filling gap can be formed between the mousehole of the melting furnace and the core brick.

This is done because, firstly, if the core bricks are of a size comparable to the size of the mousehole of the melting furnace, the difficulty of handling is increased when subsequently hanging the core bricks into the mousehole of the melting furnace, and the core bricks are not easily hung into the mousehole of the melting furnace. Secondly, if the core brick and the mousehole of the melting furnace are equal in size, although a large gap cannot be formed between the mousehole of the melting furnace and the core brick, the gap cannot be sealed, flame and high-temperature atmosphere in the melting furnace still can flow out from a small gap between the mousehole of the melting furnace and the core brick, high-temperature flame and smoke can continue to corrode the small gap between the mousehole of the melting furnace and the core brick, the core brick can be finally collapsed, and the mousehole can be formed at a repaired position.

After the core brick is cut, the core brick is hung and hung into the mousehole of the melting furnace by a hanging part, and a filling gap is formed between the core brick and the mousehole of the melting furnace. Preferably, the top of the core brick is provided with a hanging ring for hanging, and the core brick is hung up by the hanging part through the hanging ring. Specifically, when the core brick is hung and hung in the rat hole of the melting furnace, the position of the core brick is finely adjusted, and the filling gaps around the core brick are ensured to be uniform as much as possible. After the core brick is put in place, the suspension elements are fixed, leaving the core brick in a stationary state.

And after the core bricks are hung and hung in the mousehole of the melting furnace, filling the filling gap by adopting a framework material. The size of the framework material is equivalent to the width of the filling gap, and the framework material can be just clamped between two opposite side walls of the filling gap when being placed in the filling gap. When filling the framework material, the framework material in the filling gap is ensured to be even and full as much as possible, so that a larger hole is not formed in the filling gap. The shape of the framework material is not limited, and the framework material can be strip-shaped, block-shaped, granular and the like. Specifically, the framework material comprises a fire-resistant rope, a fire-resistant ball, a fire-resistant arc brick and the like.

After the framework materials are filled, gaps among the framework materials are filled by adopting hot patching materials, and the hot patching materials are tamped and regulated. And filling the space which is not filled with the framework material in the filling gap by adopting hot patching material, and then, leveling the filling gap between the mousehole of the melting furnace and the core brick by using the hot patching material. The heat-supplementing material can be in a powder shape or a mud shape, preferably in a mud shape, and the mud-shaped heat-supplementing material has high plasticity and is convenient to fill gaps among framework materials.

Maintaining the suspension state of the core brick, ensuring that the core brick cannot be loosened, after a period of time, curing and bonding the hot patching material under the heated condition, observing the bonding condition of the hot patching material, and removing the suspension component on the core brick if the bonding of the hot patching material is complete and the repaired part is not red any more. At this time, the core brick, the framework material, the hot-melt adhesive and the melting furnace wall are bonded together, so as to achieve the purpose of repairing.

According to the invention, aiming at a larger mouse hole of the melting furnace, firstly, a core brick is adopted to carry out coarse filling on the mouse hole of the melting furnace, the main space of the mouse hole of the melting furnace is filled, then, a framework material is used to carry out fine filling on a filling gap between the core brick and the mouse hole of the melting furnace, the main space of the filling gap is filled, and finally, a gap between the framework materials is further filled and sealed by a hot patching material. Compared with the prior art in which the hot patching material is directly used for filling, the patching method can avoid the phenomenon that a large amount of hot patching material falls into a kiln to pollute molten glass and influence the quality of a glass product. When the repairing method is used for repairing a larger mouse hole of the melting furnace, the hot patching material cannot pollute the melting furnace, the quality of the molten glass in the melting furnace is ensured, and the repairing quality is improved.

The core brick is made of high-temperature refractory materials, and can be silica bricks, silica-zirconia bricks, mullite and the like. The core brick is preferably a zero-expansion silica brick, and the linear expansion coefficient alpha of the zero-expansion silica brick is less than or equal to 0.2%/DEG C at the temperature of 1000 ℃. The zero-expansion silica brick has small linear expansion coefficient at high temperature, and can ensure that a filling gap is formed between the core brick and the mousehole of the melting furnace after the zero-expansion silica brick is suspended and enters the mousehole of the melting furnace.

Further, the zero expansion silica brick comprises the following components in percentage by mass on the basis of oxides: SiO2 is more than or equal to 99 percent, Al2O3 is less than or equal to 0.3 percent, and Fe2O3 is less than or equal to 0.1 percent. The physicochemical indexes of the zero-expansion silica brick are shown in table 1.

TABLE 1

In an embodiment, the framework material is a fire-resistant rope, preferably, the fire-resistant rope is a polysilicon rope, and the polysilicon rope comprises the following components in percentage by mass on the basis of oxides: more than or equal to 98.5 percent of SiO2, less than or equal to 0.5 percent of Al2O3, less than or equal to 0.3 percent of CaO, less than or equal to 0.4 percent of MgO, and less than or equal to 0.3 percent of Na 2O. The polycrystalline silicon rope is used as a framework material, and the polycrystalline silicon rope has certain flexibility, so that the filling gap between the core brick and the mouse hole of the melting furnace is conveniently filled. Meanwhile, the surface of the polycrystalline silicon rope is rough, so that the hot repairing material can be well hung, and the hot repairing material cannot fall into the melting furnace.

In one embodiment, the hot feed comprises a siliceous hot feed, the siliceous hot feed being in the form of a puree. The mud-shaped thermal compensation material has high plasticity, and is convenient for filling gaps among framework materials.

Further, in this embodiment, before the step of filling the gap between the framework materials with the hot-melt adhesive, the method for repairing a mousehole in a melting furnace further includes:

and S41, mixing and stirring the siliceous powder material and industrial phosphoric acid to prepare the siliceous heat supplementing material.

Preferably, the mass ratio of the siliceous powder material to the industrial phosphoric acid is 4-3: 1, wherein the mass concentration of the industrial phosphoric acid is 85%. For example, the siliceous powder material has a small porosity, and the amount of siliceous powder material added may be small, for example, the siliceous powder material has a large porosity, and the amount of siliceous powder material added may be large. Industrial phosphoric acid is not inherently cohesive, and exhibits good cohesiveness when it comes into contact with a refractory material (e.g., a siliceous powdery material) due to the rapid reaction between the two to form phosphate. At high temperature, the phosphate bonds with the kiln wall and the core brick, thereby achieving the repair.

The siliceous powder material takes oxides as a reference and comprises the following components in percentage by mass: SiO2 is more than or equal to 95 percent. The physical and chemical indexes of the siliceous powder material are shown in Table 2.

TABLE 2

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or flow changes made by using the contents of the specification and drawings, or directly/indirectly applied to other related technical fields under the inventive concept of the present invention are included in the scope of the present invention.