CN101890475B - Water-based zircon powder quick drying paint for ultra-large steel casting - Google Patents

Abstract

The invention discloses a water-based zircon powder quick-drying coating for super-large steel castings, which is composed of a refractory material, a binder, a suspending agent and water. The refractory material is zircon powder, and the coating also contains There is high-purity magnesia with MgO content greater than 99%. The weight percentage of each component of the coating is as follows: zircon powder 70-83%, binder 2-3.5%, suspending agent 1-2.5%, high-purity magnesia 0.1-0.5%, the rest is water, the binder is vinegar-acrylic emulsion, and the suspending agent is lithium-based bentonite. Adding a reasonable amount of auxiliary agent magnesium oxide to the paint can effectively promote the migration of water on the surface of the paint, so that the paint can accelerate the curing speed, and the next coat of paint can be applied without drying in a short period of time, simplifying the process. production process, saving resources and reducing energy consumption.

Description

A water-based zircon powder quick-drying coating for super-large steel castings

technical field

The invention relates to a casting coating, in particular to a coating suitable for large castings.

Background technique

Alcohol-based coatings are often used in the production process of existing super-large steel castings, but the safety of alcohol-based coatings is not enough, and accidents are prone to occur.

The water-based coatings used for super-large steel castings are safer than alcohol-based coatings, but the curing speed is slower. Each coating must be dried separately before the second coating can be applied, which greatly increases the production process. and energy waste, prolonging the production cycle.

Contents of the invention

The technical problem to be solved by the present invention is to provide a water-based paint with quick-drying function. After the paint is painted, it does not need to be dried in a short period of time. The surface has a certain strength and can continue to be coated with a second layer of paint.

In order to solve the problems of the technologies described above, the technical solutions provided by the invention are as follows:

A water-based zircon powder quick-drying coating for super-large steel castings, which is composed of refractory materials, binders, suspending agents, high-purity magnesia with an MgO content greater than 99%, and water. The refractory material is zircon powder , the weight percentage content of each component of the coating is as follows,

Zircon powder 70-83%, binder 2-3.5%, suspending agent 1-2.5%, high-purity magnesium oxide 0.1-0.35%, the rest is water,

The binder is vinegar acrylic emulsion, and the suspending agent is lithium bentonite.

The coating of the present invention uses zircon powder as the refractory material to ensure high refractoriness and heat storage capacity of the coating; after a large number of tests and conclusions, adding a reasonable amount of auxiliary agent magnesia can very effectively promote the migration of water on the surface of the coating, so that The coating can accelerate the curing speed, and the next coating can be applied without drying in a short period of time, which simplifies the production process, saves resources and reduces energy consumption.

After a large number of tests, the best reagents for binder and suspending agent were obtained, and the best ratio of each reagent was obtained, which consisted of 70-83% of zircon powder, 2-3.5% of vinegar-acrylic emulsion, and 1-2.5% of lithium-based bentonite. %, 0.1-0.5% of high-purity magnesium oxide, and the rest of water, can obtain the best comprehensive coating performance and quick-drying performance.

Description of drawings

In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic diagram of the preparation process of the water-based zircon powder quick-drying coating of the present invention.

Detailed ways

Fig. 1 shows the preparation process of the water-based zircon powder quick-drying paint of the present invention.

The water-based zircon powder quick-drying coating suitable for super-large steel castings, which has obtained the best performance, coating performance and quick-drying performance after a large number of tests, its weight percentage ratio is:

Zircon powder 70-83%, vinegar-acrylic emulsion 2-3.5%, lithium-based bentonite 1-2.5%, high-purity magnesium oxide (MgO content greater than 99%) 0.1-0.5%, and the rest is water.

1. First prepare composite refractories according to the table below:

2. Weighing control

Weigh the raw materials of each component of the coating according to the proportioning dosage.

3. Mix and stir

When adding materials, pay attention to adding water, lithium-based bentonite (suspension agent), vinegar-acrylic emulsion (binder) and high-purity magnesium oxide (auxiliary) in order, and the stirring speed and stirring time need to be controlled. After mixing evenly, gradually add refractory zircon powder; water and lithium-based bentonite can be used as adjustment items, which should be adjusted according to the actual situation;

If the production volume of a single batch is less than 1 ton, the stirring speed is controlled at: 750-1350 rpm, and the total stirring time after feeding is not less than 30 minutes;

4. Carry out the performance test of the coating, if it does not meet the requirements, it can be adjusted and stirred again;

5. Finished product storage.

The water-based zircon powder quick-drying coating for super-large steel castings prepared in the above examples has excellent comprehensive performance when applied to the production of super-large steel castings, and the curing speed of the coating is significantly accelerated. The next coating can be applied without drying, which simplifies the production process, saves resources and reduces energy consumption.

Claims (1)

1. A super-large water-based zircon powder quick-drying coating for steel castings is characterized in that: it is composed of high-purity magnesia and water with refractory material, binding agent, suspending agent, MgO content greater than 99%, described The refractory material is zircon powder, and the weight percentage content of each component of the coating is as follows, Zircon powder 70-83%, binder 2-3.5%, suspending agent 1-2.5%, high-purity magnesium oxide 0.1-0.35%, the rest is water, The binder is vinegar acrylic emulsion, and the suspending agent is lithium bentonite.