阅读说明：本技术 无水泥浇注料 (Cement-free castable ) 是由 张国栋 李方梁 高爱香 冯延春 于 2019-09-30 设计创作，主要内容包括：一种无水泥浇注料,属于耐火材料生产技术领域。其特征在于包括如下步骤：a.备料；b.将铝矾土进行破碎后研磨成细粉,然后通过酸洗法初步除铁,得到处理后的铝矾土；c.破碎：将刚玉骨料中加入硼酐并进行破碎和研磨；d.混合输出：将所有物料充分混合得到最终成品,并将成品通过成料输送带输出进行包装即可。本发明未使用水泥作为功能性组分,而是使用将刚玉骨料中预混硼酐的形式,施工采用烧结法,施工面从室温升至450-550℃,硼酐生成粘性液相,随后与α-氧化铝发生固液反应,生成更高熔融温度的化合物后将刚玉骨料固结在一起,由于陶瓷结合的反应能够有效提升可塑料在中高温的使用强度和硬度,提升可塑料施工面的耐磨性。(A cement-free castable belongs to the technical field of refractory material production and is characterized by comprising the following steps of a, preparing materials, b, crushing bauxite, grinding the bauxite into fine powder, then preliminarily removing iron through an acid washing method to obtain treated bauxite, c, crushing, adding boric anhydride into corundum aggregate, crushing and grinding, d, mixing and outputting, fully mixing all the materials to obtain a final product, outputting the finished product through a finished product conveying belt, and packaging.)

1. The cement-free castable is characterized by comprising the following steps:

a. preparing materials: preparing materials and weighing according to the following parts by weight:

50-70 parts of bauxite;

α -10-15 parts of alumina powder;

20-30 parts of corundum aggregate;

2-5 parts of boric anhydride;

10-25 parts of active silicon micro powder;

10-25 parts of bentonite;

10-20 parts of titanium oxide;

5-10 parts of a hardening agent;

3-5 parts of a water reducing agent;

15-25 parts of water;

b. crushing bauxite, grinding the crushed bauxite into fine powder, and then preliminarily removing iron by an acid washing method to obtain the treated bauxite;

c. crushing: adding boric anhydride into corundum aggregate, and crushing and grinding;

d. and (3) mixed output: and fully mixing all the materials to obtain a final finished product, and outputting the finished product through a finished product conveying belt for packaging.

2. The cement-free castable according to claim 1, wherein the hardening agent is silica sol and magnesium oxide, and the mass ratio of the silica sol to the magnesium oxide is 1: 1.

3. A cement-free castable material according to claim 2, characterised in that said water reducing agent is melamine.

4. The construction method of a cement-free castable according to claim 3, characterized in that the castable is sprayed on the construction surface by spraying equipment, the construction surface is heated and sintered at the sintering temperature of 450-550 ℃, the temperature is kept for 2-3 hours, and then the construction method is naturally cooled to room temperature.

Technical Field

The invention belongs to the technical field of refractory material production, and particularly relates to a cement-free castable.

Background

During the preparation process of the refractory castable, cement is required to be added as an important functional component so as to obtain enough high normal temperature strength, but the strength of the castable containing the cement is obviously reduced at medium temperature, and the strength and the erosion resistance at high temperature are reduced. Therefore, the cement-containing plastic material cannot meet the use requirements at medium and high temperature stages. Simple removal of the cement component slows down the setting rate of the casting material in use and does not achieve effective base strength and hardness.

In view of this, the applicant designs a cement-free castable, which can effectively improve the use strength, hardness and wear resistance of the plastic at medium and high temperatures on the premise of not adding cement.

Disclosure of Invention

The invention aims to provide a cement-free castable which can effectively improve the use strength and hardness of the castable at medium and high temperatures. The second technical problem solved by the invention is that the effective components of the plastic material are subjected to ceramic bonding reaction through scientific design construction steps, so that the wear resistance of the construction surface of the plastic material is improved.

In order to solve the technical problems, the technical scheme of the invention is as follows: the cement-free castable is characterized by comprising the following steps:

a. preparing materials: preparing materials and weighing according to the following parts by weight:

50-70 parts of bauxite;

α -10-15 parts of alumina powder;

20-30 parts of corundum aggregate;

2-5 parts of boric anhydride;

10-25 parts of active silicon micro powder;

10-25 parts of bentonite;

10-20 parts of titanium oxide;

5-10 parts of a hardening agent;

3-5 parts of a water reducing agent;

15-25 parts of water;

b. crushing bauxite, grinding the crushed bauxite into fine powder, and then preliminarily removing iron by an acid washing method to obtain the treated bauxite;

c. crushing: adding boric anhydride into corundum aggregate, and crushing and grinding;

d. and (3) mixed output: and fully mixing all the materials to obtain a final finished product, and outputting the finished product through a finished product conveying belt for packaging.

Preferably, the hardening agent is silica sol and magnesium oxide, wherein the mass ratio of the silica sol to the magnesium oxide is 1: 1.

Preferably, the water reducing agent is melamine.

The construction method of the cement-free castable is characterized in that the castable is sprayed on a construction surface through spraying equipment, the construction surface is heated and sintered at the sintering temperature of 450 ℃ and 550 ℃, the temperature is kept for 2-3 hours, and then the castable is naturally cooled to the room temperature.

Compared with the prior art, the invention has the beneficial effects that:

the cement-free castable disclosed by the invention does not use cement as a functional component, but uses a form of premixing boric anhydride in corundum aggregate, the construction adopts a sintering method, the construction surface is heated to 450-550 ℃ from room temperature, the boric anhydride generates a viscous liquid phase, and then the viscous liquid phase and α -alumina generate a solid-liquid reaction to solidify the corundum aggregate after a compound with a higher melting temperature is generated, and the use strength and hardness of the plastic at medium and high temperature can be effectively improved due to the ceramic combination reaction, so that the wear resistance of the construction surface of the plastic can be improved.

Detailed Description

The present invention will be described in further detail with reference to specific embodiments.

The invention relates to a cement-free castable which is characterized by comprising the following steps:

a. preparing materials: preparing materials and weighing according to the following parts by weight:

50-70 parts of bauxite;

α -10-15 parts of alumina powder;

20-30 parts of corundum aggregate;

2-5 parts of boric anhydride;

10-25 parts of active silicon micro powder;

10-25 parts of bentonite;

10-20 parts of titanium oxide;

5-10 parts of a hardening agent;

3-5 parts of a water reducing agent;

15-25 parts of water;

b. crushing bauxite, grinding the crushed bauxite into fine powder, and then preliminarily removing iron by an acid washing method to obtain the treated bauxite;

c. crushing: adding boric anhydride into corundum aggregate, and crushing and grinding;

d. and (3) mixed output: and fully mixing all the materials to obtain a final finished product, and outputting the finished product through a finished product conveying belt for packaging.

The hardening agent is silica sol and magnesium oxide, wherein the mass ratio of the silica sol to the magnesium oxide is 1: 1.

The water reducing agent is melamine.

The construction method of the cement-free castable is characterized in that the castable is sprayed on a construction surface through spraying equipment, the construction surface is heated and sintered at the sintering temperature of 450 ℃ and 550 ℃, the temperature is kept for 2-3 hours, and then the castable is naturally cooled to the room temperature.

The specific examples of the base material ratios are shown in table one:

the cement-free castable disclosed by the invention does not use cement as a functional component, but uses a mode of premixing boron anhydride in corundum aggregate, the construction adopts a sintering method, the construction surface is heated to 550 ℃ from room temperature to 450- ₂O ₃·B ₂O ₃(inconsistent melting temperature 1035 ℃ C.) with 9Al ₂O ₃·2B ₂O ₃(the inconsistent melting temperature is 1935 ℃) and then the corundum aggregate is consolidated together, and the use strength and hardness of the plastic at medium and high temperature can be effectively improved due to the reaction of ceramic combination, so that the plastic application is improvedWear resistance of the work surface.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention, without departing from the technical solution of the present invention, still belong to the protection scope of the technical solution of the present invention.