阅读说明：本技术 一种用于无芯感应电炉的炉衬材料及其制备方法 (Furnace lining material for coreless induction furnace and preparation method thereof ) 是由 张海 于 2019-11-12 设计创作，主要内容包括：本发明公开了一种用于无芯感应电炉的炉衬材料及其制备方法,所述炉衬材料包括以下重量份数的原料组成：板状刚玉50～70份、高温氧化铝80～100份、氧化镁60～80份、混合石英颗粒50～70份、粘土15～25份、六偏磷酸钠10～20份和添加剂5～15份。采用本发明所述方法制备的炉衬材料,在不停炉的情况下直接加入炉内进行修补,其修补操作方便,快捷,且修补时间短,结合强度高,硬化快、耐高温,热稳定性高,能大大提高电炉的利用率和使用寿命,特别适合推广应用。(The invention discloses a furnace lining material for a coreless induction furnace and a preparation method thereof, wherein the furnace lining material comprises the following raw materials in parts by weight: 50-70 parts of tabular corundum, 80-100 parts of high-temperature alumina, 60-80 parts of magnesium oxide, 50-70 parts of mixed quartz particles, 15-25 parts of clay, 10-20 parts of sodium hexametaphosphate and 5-15 parts of an additive. The furnace lining material prepared by the method is directly added into the furnace for repairing without stopping the furnace, the repairing operation is convenient and quick, the repairing time is short, the bonding strength is high, the hardening is quick, the high temperature resistance is realized, the thermal stability is high, the utilization rate of the electric furnace can be greatly improved, the service life is prolonged, and the method is particularly suitable for popularization and application.)

1. The furnace lining material for the coreless induction furnace is characterized by comprising the following raw materials in parts by weight: 50-70 parts of tabular corundum, 80-100 parts of high-temperature alumina, 60-80 parts of magnesium oxide, 50-70 parts of mixed quartz particles, 15-25 parts of clay, 10-20 parts of sodium hexametaphosphate and 5-15 parts of an additive.

2. A lining material for a coreless induction furnace according to claim 1, wherein: the furnace lining material comprises the following raw materials in parts by weight: 55-60 parts of tabular corundum, 90-95 parts of high-temperature alumina, 70-75 parts of magnesium oxide, 60-65 parts of mixed quartz particles, 18-22 parts of clay, 13-16 parts of sodium hexametaphosphate and 8-12 parts of an additive.

3. A lining material for a coreless induction furnace according to claim 1 or 2, wherein: the additive is formed by mixing one or more of resin, refractory white clay powder and solid glass powder according to any ratio.

4. A lining material for a coreless induction furnace according to claim 1 or 2, wherein: the mixed quartz particles are formed by mixing coarse quartz particles, medium quartz particles and fine quartz particles according to the ratio of 1:1.5:1, wherein the mesh number of the coarse quartz particles is 10 meshes, the mesh number of the medium quartz particles is 40 meshes, and the mesh number of the fine quartz particles is 280 meshes.

5. A lining material for a coreless induction furnace according to claim 1 or 2, wherein: the plate-shaped corundum is aluminum trioxide with the weight percentage not less than 99.2%, the high-temperature aluminum oxide is aluminum trioxide with the weight percentage not less than 99.2%, the magnesium oxide is magnesium oxide powder with the weight percentage not less than 99.2%, and the clay is high-temperature-resistant clay.

6. A lining material for a coreless induction furnace according to claim 5, wherein: the granularity of the plate-shaped corundum is 0.8-1.2 mm, the granularity of the high-temperature alumina is 1-1.5 mm, and the granularity of the magnesium oxide is 1.5-2 mm.

7. A method for producing a lining material according to claim 1, characterized in that the method comprises the steps of:

(1) weighing the raw materials according to the weight part ratio of the raw materials, and preparing purified water;

(2) uniformly stirring the mixed quartz particles, screening out dust particles formed by internal collision, then adding magnesium oxide, uniformly stirring, and screening out the dust particles formed by internal collision to obtain a mixed material A;

(3) adding purified water into the mixture A prepared in the step (2), wherein the water adding amount is 20 times of that of the mixture A, then adding clay, and uniformly mixing to obtain a mixture B;

(4) mixing the plate-shaped corundum with the high-temperature alumina to obtain a mixture C, adding purified water, wherein the water addition amount is 12 times of that of the mixture C, and uniformly stirring to obtain a mixture D;

(5) and (3) mixing the mixture B prepared in the step (3) with the mixture D prepared in the step (4), uniformly stirring, adding sodium hexametaphosphate and an additive, uniformly stirring to obtain a mixture E, screening magnetic particles in the mixture E by adopting screening equipment, and taking out the magnetic particles to obtain the magnetic particle-free magnetic material.

8. The method of claim 7, wherein: and (3) uniformly stirring the mixed quartz particles in the step (2), screening out dust particles formed by internal collision, adding magnesium oxide, uniformly stirring, screening out dust particles formed by internal collision, recovering the dust particles formed by screening, mixing the recovered dust particles with a furnace lining material as a raw material, and using the recovered dust particles to the position to be repaired.

Technical Field

The invention relates to the technical field of furnace lining materials in electric furnaces, in particular to a furnace lining material for a coreless induction furnace and a preparation method thereof.

Background

The electric furnace is a heating furnace which converts electric energy in the furnace into heat to heat a workpiece, and can be divided into an industrial electric furnace and a household electric furnace. The industrial electric furnace is divided into a resistance furnace, an induction furnace, an electric arc furnace, a plasma furnace, an electron beam furnace and the like, and compared with a fuel furnace, the electric furnace has the advantages that: the atmosphere in the furnace is easy to control, the materials are heated quickly, the heating temperature is high, the temperature is easy to control, the production process is easy to realize mechanization and automation, the labor sanitary condition is good, the heat efficiency is high, the product quality is good, the environment is more environment-friendly, and the environmental problem which is serious day by day is favorably relieved. With the development of modern industrial technology, the induction furnace becomes the most energy-saving electric conversion heating mode in the electric furnace, and is widely applied to multiple fields of families, medicines, chemical industry, metallurgy and the like.

The electric induction furnace is a device which converts electric energy into heat energy by utilizing the electromagnetic field induction principle so as to melt metal furnace burden. The induction electric furnace may be classified into a coreless induction electric furnace and a cored induction electric furnace according to the structure. The coreless induction furnace has been used by more and more enterprises because of its advantages of fast heating speed, intermittent operation, less element burning loss during smelting, low furnace lining cost, flexible and convenient use, etc.

The quality of the furnace lining is one of key factors influencing the using effect of the coreless induction furnace, the preparation method of the furnace lining material for the traditional coreless induction furnace is complicated, the price of the used material is expensive, the labor intensity for preparing the furnace lining is high, the working efficiency is low, and the service life of the furnace lining is short. Therefore, reasonable furnace lining materials are selected, the furnace lining can be repaired, the service life of the furnace lining can be prolonged, accidents caused by damage of the furnace lining can be prevented, meanwhile, the enterprise cost can be reduced, and the service life of the electric furnace can be prolonged.

Disclosure of Invention

Aiming at the problems in the background art, the invention aims to provide a furnace lining material which is low in cost, short in repairing time, long in service life and convenient to repair so as to solve the accidents caused by the damage of the furnace lining, and particularly relates to the furnace lining material for the coreless induction furnace and a preparation method thereof.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a furnace lining material for a coreless induction furnace comprises the following raw materials in parts by weight: 50-70 parts of tabular corundum, 80-100 parts of high-temperature alumina, 60-80 parts of magnesium oxide, 50-70 parts of mixed quartz particles, 15-25 parts of clay, 10-20 parts of sodium hexametaphosphate and 5-15 parts of an additive.

Further, the furnace lining material for the coreless induction furnace comprises the following raw materials in parts by weight: 55-60 parts of tabular corundum, 90-95 parts of high-temperature alumina, 70-75 parts of magnesium oxide, 60-65 parts of mixed quartz particles, 18-22 parts of clay, 13-16 parts of sodium hexametaphosphate and 8-12 parts of an additive.

Furthermore, the lining material for the coreless induction furnace is prepared by mixing one or more of resin, refractory white mud powder and solid glass powder according to any ratio.

Further, the furnace lining material for the coreless induction furnace is characterized in that the mixed quartz particles are formed by mixing coarse quartz particles, medium quartz particles and fine quartz particles according to a ratio of 1:1.5:1, wherein the mesh number of the coarse quartz particles is 10 meshes, the mesh number of the medium quartz particles is 40 meshes, and the mesh number of the fine quartz particles is 280 meshes.

Further, the plate-shaped corundum is alumina with the weight percentage of not less than 99.2%, the high-temperature alumina is alumina with the weight percentage of not less than 99.2%, the magnesia is magnesia powder with the weight percentage of not less than 99.2%, and the clay is high-temperature-resistant clay.

Further, the furnace lining material for the coreless induction furnace is characterized in that the granularity of the plate-shaped corundum is 0.8-1.2 mm, the granularity of the high-temperature alumina is 1-1.5 mm, and the granularity of the magnesium oxide is 1.5-2 mm.

The invention also discloses a preparation method of the furnace lining material, which comprises the following steps:

(1) weighing the raw materials according to the weight part ratio of the raw materials, and preparing purified water;

(2) uniformly stirring the mixed quartz particles, screening out dust particles formed by internal collision, then adding magnesium oxide, uniformly stirring, and screening out the dust particles formed by internal collision to obtain a mixed material A;

(3) adding purified water into the mixture A prepared in the step (2), wherein the water adding amount is 20 times of that of the mixture A, then adding clay, and uniformly mixing to obtain a mixture B;

(4) mixing the plate-shaped corundum with the high-temperature alumina to obtain a mixture C, adding purified water, wherein the water addition amount is 12 times of that of the mixture C, and uniformly stirring to obtain a mixture D;

(5) and (3) mixing the mixture B prepared in the step (3) with the mixture D prepared in the step (4), uniformly stirring, adding sodium hexametaphosphate and an additive, uniformly stirring to obtain a mixture E, screening magnetic particles in the mixture E by adopting screening equipment, and taking out the magnetic particles to obtain the magnetic particle-free magnetic material.

Further, the preparation method of the invention, wherein in the step (2), the mixed quartz particles are uniformly stirred, dust particles formed by internal collision are screened out, then magnesium oxide is added, the dust particles formed by internal collision are screened out after uniform stirring, the screened dust particles are recovered and are mixed with a furnace lining material as a raw material for use, and the mixture is used for a position to be repaired.

Compared with the prior art, the furnace lining material for the coreless induction furnace and the preparation method thereof have the beneficial effects that: the furnace lining material is prepared by selecting the tabular corundum, the high-temperature alumina, the magnesium oxide, the mixed quartz particles, the clay, the sodium hexametaphosphate and the additive as raw materials, has wide raw material source and low price, reduces the cost of the furnace lining material of the coreless induction furnace, is added under the condition of not stopping the furnace, has convenient and quick repairing operation, short repairing time, high bonding strength, quick hardening, high temperature resistance and high thermal stability, can greatly improve the utilization rate and the service life of the electric furnace, and is particularly suitable for popularization and application.

Detailed Description

In order to more fully illustrate the practice of this invention, the invention is further described in connection with the following specific examples, which are intended to be illustrative only and not limiting as to the scope of the invention.