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Method for preparing iron casting coating by flyash

A technology of fly ash and paint, which is applied in casting molding equipment, coating, mold and other directions, can solve the problems of poor paint quality and labor conditions, and achieve the effects of easy sand cleaning, easy peeling, and excellent surface quality of castings

Inactive Publication Date: 2009-12-16
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coatings in most factories are still prepared for their own use, and the quality, work efficiency and working conditions of the coatings used in many factories are poor.

Method used

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  • Method for preparing iron casting coating by flyash
  • Method for preparing iron casting coating by flyash
  • Method for preparing iron casting coating by flyash

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] 1. Feasibility analysis of fly ash cast iron coating

[0029] (1) Chemical composition of fly ash

[0030] Chemical composition is one of the important characteristics of fly ash, and it is the main basis for the experimental research of fly ash cast iron coating. A large number of research results show that the main chemical composition of fly ash is SiO 2 、Al 2 o 3 , CaO and Fe 2 o 3 Wait. The general variation range of the chemical composition of fly ash in power plants in my country is shown in Table 1.

[0031] Table 1: Chemical composition of fly ash

[0032]

[0033] (2) Physical and chemical properties of fly ash

[0034] Fly ash is the powdery residue brought out by the flue gas from the boiler after the combustion of pulverized coal. It is the ash in the coal (mainly inorganic minerals such as silicon, aluminum, calcium, iron and other elements). Solid particles formed after sintering, melting and cooling processes. The particle size is between 0....

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Abstract

The invention discloses a method for preparing iron casting coating by flyash. The iron casting coating prepared by the method comprises refractory powder, an additive and carrier liquid; wherein, the refractory powder comprises flyash and high-alumina bauxite; the additive comprises organic bentonite, phenolic resins, PVB, CMC and a defoaming agent; the carrier liquid is alcohol. The preparation process comprises the following steps: pretreating the organic bentonite, CMC, PVB and phenolic resins, mixing the above materials with other raw materials, stirring and dispersing the mixture in an agitator, grinding and homogenizing the mixture and regulating the density and viscosity of the coating, packing the coating in a barrel special for coatings and sealing the barrel, thus preparing the finished product. The coating is coated on the surface of a sand mould (core) and then is ignited and quickly dried to form a coat so as to enhance the casting mould surface strength and sand-burning resistance. The coat is easily stripped and sand is easily cleared after casting pouring. Use of the coating can achieve the effect of fine casting surface quality.

Description

technical field [0001] The invention relates to the preparation of casting coatings, in particular to a preparation method of fly ash cast iron coatings. Background technique [0002] Foundry coating is a casting auxiliary material that covers the surface of the mold cavity and core to improve its surface refractoriness, chemical stability, resistance to molten metal erosion, and sand adhesion resistance. Refractory coatings play a very important role in the foundry industry. Before the casting is poured, a layer of refractory coating is applied on the surface of the mold, which can effectively prevent defects such as sand sticking, sand inclusions, and sand holes in the casting, improve the surface quality of the casting, and reduce the cost of the casting. [0003] Coating the surface of the mold can reduce the cleaning workload of the casting, reduce labor and improve the working environment. According to a rough estimate, the cost of casting cleaning accounts for about...

Claims

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Application Information

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IPC IPC(8): B22C3/00
Inventor 华建社袁启奇刘明华赵小龙
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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