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Method for preparing flow coating capable of overcoming sulfur seepage defect

A technology of defect and flow coating, which is applied in the direction of coating, manufacturing tools, casting and molding equipment, etc., to achieve the effect of good thermal crack resistance, high dry strength, and improved fatigue resistance

Inactive Publication Date: 2015-12-23
GANSU KOCEL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of the prior art, and provide a unique method, remarkable effect of preventing sulfur seepage, better effect of preventing thermal cracking, environmental protection, no pollution, low viscosity and non-toxic flow for preventing sulfur seepage defects. Method of preparing paint

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment one: a kind of preparation method of the flow-coating paint of anti-sulfur seepage defect, this method comprises the steps:

[0023] Ⅰ. Pretreatment of suspending agent: mix the composite suspending agent and water at a mass ratio of 1:3 under stirring, completely disperse evenly, and let it stand for 24 hours to obtain a pretreated suspending agent slurry;

[0024] Ⅱ. Pretreatment of polyvinyl alcohol: weigh 5 times the mass of polyvinyl alcohol in a bucket, slowly add polyvinyl alcohol under stirring conditions, then fully stir until it is completely dissolved, and filter with a sieve, ready to use;

[0025] Ⅲ. Add appropriate amount of water and treated suspension agent slurry to the dispersion tank, start stirring, then add defoamer, surfactant, thickener, binder, etc.; finally add the pretreated polyvinyl alcohol solution, Stir for 10-20 minutes;

[0026] Ⅳ. Keep the stirring speed adjusted to 500r / min, add refractory aggregates to the dispersing kettle...

Embodiment 2

[0029] Embodiment two: a kind of preparation method of the flow-coating paint of anti-sulfur seepage defect, this method comprises the steps:

[0030] Ⅰ. Pretreatment of suspending agent: mix the composite suspending agent and water at a mass ratio of 1:3 under stirring, completely disperse evenly, and let it stand for 24 hours to obtain a pretreated suspending agent slurry;

[0031] Ⅱ. Pretreatment of polyvinyl alcohol: weigh 5 times the mass of polyvinyl alcohol in a bucket, slowly add polyvinyl alcohol under stirring conditions, then fully stir until it is completely dissolved, and filter with a sieve, ready to use;

[0032] Ⅲ. Add appropriate amount of water and treated suspension agent slurry to the dispersion tank, start stirring, then add defoamer, surfactant, thickener, binder, etc.; finally add the pretreated polyvinyl alcohol solution, Stir for 10-20 minutes;

[0033] Ⅳ. Keep the stirring speed adjusted to 500r / min, add refractory aggregates to the dispersing kettle...

Embodiment 3

[0036] Embodiment three: a kind of preparation method of the flow-coating paint of anti-sulfur seepage defect, this method comprises the following steps:

[0037] Ⅰ. Pretreatment of suspending agent: mix the composite suspending agent and water at a mass ratio of 1:3 under stirring, completely disperse evenly, and let it stand for 24 hours to obtain a pretreated suspending agent slurry;

[0038] Ⅱ. Pretreatment of polyvinyl alcohol: weigh 5 times the mass of polyvinyl alcohol in a bucket, slowly add polyvinyl alcohol under stirring conditions, then fully stir until it is completely dissolved, and filter with a sieve, ready to use;

[0039] Ⅲ. Add appropriate amount of water and treated suspension agent slurry to the dispersion tank, start stirring, then add defoamer, surfactant, thickener, binder, etc.; finally add the pretreated polyvinyl alcohol solution, Stir for 10-20 minutes;

[0040] Ⅳ. Keep the stirring speed adjusted to 500r / min, add refractory aggregates to the dispe...

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Abstract

The invention relates to a method for producing a flow coating, in particular to a method for preparing a flow coating capable of overcoming the sulfur seepage defect. The method comprises the following steps that a suspending agent is pretreated; polyving akohol is pretreated; a proper amount of water and a proper amount of treated suspending agent slurry are added into a dispersing kettle, stirring is started, and then a defoaming agent, a surface active agent, a thickening agent, a binding agent and the like are added; finally, the pretreated polyving akohol solution is added, and stirring is conducted for 10-20 minutes; the stirring speed is regulated to be kept being 500 r / min, and refractory aggregates are sequentially added into the dispersing kettle; the rotating speed is regulated to be 1200r / min after adding of the aggregates is completed, and dispersing is conducted for 20 minutes; and the baume degree is adjusted by means of water and controlled to be 80-90 degrees, and then the flow coating is obtained. The method is unique, the sulfur seepage preventing effect is remarkable, the anti-heat-crack effect is good, environmental friendliness is achieved, pollution is avoided, the viscosity is low, and the flow coating is nontoxic.

Description

technical field [0001] The invention relates to a production method of a flow coating, in particular to a preparation method of a flow coating for preventing sulfur seepage defects. Background technique [0002] Due to its characteristics, the production of steel castings is prone to thermal cracking defects during the solidification process, especially the use of furan resin self-setting sand, through research on molding materials, process measures, etc., the macroscopic capillary cracks of castings have been basically eliminated, but in castings In some parts of the mold, capillary cracks appear from time to time, often appearing in the plane part, near the parting surface, and distributed along the direction of the parting surface, which is difficult to solve in the process. Through the physical, chemical and flaw detection of the capillary cracks on the casting surface, it is found that the sulfur content in the capillary crack area is higher than that in other parts. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00
Inventor 李天才韩文
Owner GANSU KOCEL CHEM
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