Production method for refractory precast block

A production method and prefabricated block technology, applied in the field of refractory materials, can solve the problems of thin kraft paper, poor effect, asphalt pollution, etc., and achieve the effects of easy operation, reduction of crack phenomenon and scrap rate, and elimination of expansion cracks

Inactive Publication Date: 2009-10-14
鞍山市和丰耐火材料有限公司
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AI Technical Summary

Problems solved by technology

However, asphalt pollution is harmful and the operation is troublesome
The thickness of kraft paper is thin, it is difficult to fix, and the effect is not good

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] A method for producing refractory prefabricated blocks. After arranging PVC foaming material on the outer surface of a steel structure, the steel structure is embedded in the refractory prefabricated block. When the refractory prefabricated block is dry, the high temperature melts the PVC foaming material, and the Provide enough space for the steel structure to expand and occupy, thereby eliminating the expansion cracks that occur when the refractory prefabricated block is dry and used. The PVC foaming material is PVC foam pad paper or liquid PVC foaming agent with a melting temperature of 100-250°C.

[0017] Before the production of large and medium-sized prefabricated blocks, wrap PVC foam pad paper of a certain thickness (1.5-3.0mm) tightly on the outer surface of the steel structure and fix it with transparent tape. If there are too many anchors on the outer surface of the steel structure and cannot be wound, use liquid PVC foaming agent, spray it on the required su...

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Abstract

The invention relates to a production method for a refractory precast block. The refractory precast block is preset with a cushion layer between the outside surface of the steel structural component and external refractory material; the required condition of the cushion layer is to have certain strength during normal casting so as to ensure the formation of the self thickness space; low melting points, the cushion layer can be melted in the 100 to 250 DEG C to vacate the original thickness space used for being occupied by the expanded steel structural component. The cushion layer is a PVC foaming packing paper or a liquid PVC forming agent. The production method has the beneficial effects: (1) a familiar PVC forming material is used for replacing previous asphalt and kraft paper, thus greatly reducing the seaminess and rejection rate of the big-and-middle-sized refractory precast block; (2) the production method has low cost, is easy to operate and has little pollution.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a production method of refractory prefabricated blocks. Background technique [0002] Refractory prefabricated block is a commonly used type of refractory material, which has the characteristics of convenient construction and replacement, energy saving, and excellent thermal shock stability. Generally, due to the overall strength and other reasons, large and medium-sized prefabricated blocks are equipped with steel structural parts (common steel, heat-resistant steel, etc.) in the middle of refractory materials. The shape and quantity of steel structural parts are determined according to the shape of the prefabricated block. Rational design of steel structural parts is an important production technology for producing high-quality prefabricated blocks. [0003] After the prefabricated block is molded by vibrating casting, after demoulding and necessary curing, it also needs to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28B23/00
Inventor 孙逊李涛尚德宏苏士文
Owner 鞍山市和丰耐火材料有限公司
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