阅读说明：本技术 一种热态修补喷涂料及其制备方法 (Thermal state repairing spray coating and preparation method thereof ) 是由 马骥 姜丽霞 于 2019-08-23 设计创作，主要内容包括：本发明属于喷涂料技术领域,具体涉及一种在热态下快速修补工作村的热态修补喷涂料及其制备方法。本发明由以下组分按重量百分比计,包括：棕刚玉70-76%,广西白泥4.5-5.5%,纯铝酸钙70水泥4.5-5.5%,硼酸1.5-2.5%,金属硅4.5-5.5%,金属铝1.5-2.5%,碳化硅7-9%。本发明在热态下快速修补由于工作衬在使用过程中出现的局部侵蚀严重、剥落或者局部损坏的情况,并且本发明制得的成品粘结好,强度高,使用寿命长。(The invention belongs to the technical field of spray coatings, and particularly relates to a thermal state repairing spray coating for rapidly repairing a working area in a thermal state and a preparation method thereof. The invention comprises the following components in percentage by weight: 70-76% of brown corundum, 4.5-5.5% of Guangxi white mud, 4.5-5.5% of pure calcium aluminate 70 cement, 1.5-2.5% of boric acid, 4.5-5.5% of silicon metal, 1.5-2.5% of aluminum metal and 7-9% of silicon carbide. The invention can quickly repair the conditions of serious local erosion, peeling or local damage in the using process of the working lining in a hot state, and the finished product prepared by the invention has good bonding, high strength and long service life.)

1. The hot repairing spray coating is characterized by comprising the following components in percentage by weight:

70-76% of brown corundum, 4.5-5.5% of Guangxi white mud, 4.5-5.5% of pure calcium aluminate 70 cement, 1.5-2.5% of boric acid, 4.5-5.5% of silicon metal, 1.5-2.5% of aluminum metal and 7-9% of silicon carbide.

2. The hot repair spray according to claim 1, comprising the following components in weight percent:

73% of brown corundum, 5% of Guangxi white mud, 5% of pure calcium aluminate cement, 2% of boric acid, 5% of metal silicon, 2% of metal aluminum and 8% of silicon carbide.

3. The method of claim 1, comprising the steps of:

s1: mixing Guangxi white mud and boric acid fully to obtain a mixture 1 for later use;

s2: fully mixing metal silicon and metal aluminum to obtain a mixture 2 for later use;

s3: fully mixing brown corundum, cement and silicon carbide to obtain a mixture 3 for later use;

s4: and adding the mixture 3 into a stirrer, mixing and grinding for 5 minutes, adding the mixture 2, mixing and grinding for 5 minutes, and finally adding the mixture 1, mixing and grinding for 15 minutes to obtain a finished product.

Technical Field

The invention belongs to the technical field of spray paint, and particularly relates to thermal state repairing spray paint capable of rapidly repairing local damage of a working lining in a thermal state and a preparation method thereof.

Background

The continuous casting tundish lining is generally composed of a permanent lining and a working lining, the permanent lining is generally integrally cast by adopting a casting material, and the working lining is generally constructed by adopting a magnesium coating material or a dry material. In the using process of the working lining, the working lining can be seriously corroded, peeled off or damaged locally, the normal use is influenced, the working lining needs to be shut down for maintenance or demolished, the loss and the waste are large, in the prior art, the working lining can be repaired after being cooled to the normal temperature, and a spray coating for rapidly repairing in a hot state and a preparation method of the spray coating are lacked.

Disclosure of Invention

The invention aims to provide a thermal state repairing spray coating capable of quickly repairing local damage of a working lining in a thermal state and a preparation method thereof.

Based on the purpose, the invention adopts the following technical scheme:

the hot repairing spray coating comprises the following components in percentage by weight:

70-76% of brown corundum, 4.5-5.5% of Guangxi white mud, 4.5-5.5% of pure calcium aluminate 70 cement, 1.5-2.5% of boric acid, 4.5-5.5% of silicon metal, 1.5-2.5% of aluminum metal and 7-9% of silicon carbide.

Preferably, the composition comprises the following components in percentage by weight:

73% of brown corundum, 5% of Guangxi white mud, 5% of pure calcium aluminate cement, 2% of boric acid, 5% of metal silicon, 2% of metal aluminum and 8% of silicon carbide.

A preparation method of a thermal state repairing spray coating comprises the following steps:

s1: mixing Guangxi white mud and boric acid fully to obtain a mixture 1 for later use;

s2: fully mixing metal silicon and metal aluminum to obtain a mixture 2 for later use;

s3: fully mixing brown corundum, cement and silicon carbide to obtain a mixture 3 for later use;

s4: and adding the mixture 3 into a stirrer, mixing and grinding for 5 minutes, adding the mixture 2, mixing and grinding for 5 minutes, and finally adding the mixture 1, mixing and grinding for 15 minutes to obtain a finished product.

Advantageous effects

According to the invention, the boric acid is added, so that the low-temperature strength is increased, and the phenomena of infirm adhesion and block falling are prevented. The addition of metal silicon and metal aluminum improves the oxidation resistance and the anti-explosion performance. The addition of Guangxi white mud and cement improves the bonding property and high-temperature sintering property. The addition of silicon carbide improves the heat conductivity and high-temperature thermal stability. The compression strength of the spray coating prepared by the invention is more than 35 at 110 ℃ for 24 h; the compressive strength is more than 50 at 1350 ℃ for 4 h. The invention can quickly repair the conditions of serious local erosion, peeling or local damage in the using process of the working lining in a hot state, and the finished product prepared by the invention has good bonding, high strength and long service life.

Detailed description of the invention

In the following examples, the brown alumina was made of Sanmen Xia capacitive corundum Co.Ltd, the Guangxi white mud was made of Guangxi Weiro mining Co.Ltd, the pure calcium aluminate cement was made of Tianjin Lau pure calcium aluminate 70 cement, the boric acid was Russian imported boric acid, the metallic silicon was made of Anyang Dingxing metallurgy Co.Ltd, the metallic aluminum was made of Luoyang discoverer aluminum Co.Ltd, and the silicon carbide was made of Ningyangtong Co.Ltd.

Boric acid can increase low-temperature sintering strength, and the metal silicon has stronger oxidation resistance. The brown corundum has good compactness and low water absorption, and the Guangxi white mud increases the medium-high temperature strength and improves the adhesive force. The metal aluminum has stronger oxidation resistance, anti-burst performance and water reducing performance, and the silicon carbide has better heat conducting performance and thermal stability.

The following examples were prepared according to the following procedure:

(1) mixing Guangxi white mud and boric acid fully to obtain a mixture 1 for later use;

(2) fully mixing metal silicon and metal aluminum to obtain a mixture 2 for later use;

(3) fully mixing brown corundum, cement and silicon carbide to obtain a mixture 3 for later use;

(4) and adding the mixture 3 into a stirrer, mixing and grinding for 5 minutes, adding the mixture 2, mixing and grinding for 5 minutes, and finally adding the mixture 1, mixing and grinding for 15 minutes to obtain a finished product.