RU2300460C1 - Method for producing stone articles - Google Patents

Abstract

FIELD: different branches of industry, possibly manufacture of stone building, chemically resistant, dielectric, refractory and wear resistant articles.

SUBSTANCE: method for producing stone articles comprises steps of filling forms with heated material; soaking articles in them and then removing cooled articles out of forms; heating stone material up to softening temperature, "yielding" under load; placing batch of heated material in squeezing chamber; then displacing said material to working cavities of forms by means of mechanical force.

EFFECT: shortened time period for soaking articles in forms, lowered cost price of stone articles, reduced power consumption for producing articles.

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Description

The invention relates to various industries and can be used in the manufacture of stone (diabase, basalt, etc.) construction, chemically resistant, dielectric, refractory and wear-resistant products.

A known method of casting stone products (diabase and basalt), including the melting of the stone, the subsequent pouring of the melt into molds, holding the products in molds and extracting products from molds (V.N. Ivanov. Dictionary-reference book on foundry production. Moscow: Engineering, 1990 , p. 10).

The disadvantages of this method are the high energy costs for heating the stone for melting (1500 ÷ 1600 ° C), the large exposure time of the products in molds for crystallization and cooling from the casting temperature of 1200-1205 ° C for diabase and> 1250 ° C for basalt.

The aim of the invention is to eliminate the noted disadvantages, namely:

- reduction of energy consumption for the production of products,

- reducing the exposure time of products in the forms.

This goal is achieved by the fact that in the method of manufacturing stone products, including heating the stone material, filling molds with heated material, holding the products in them and then removing the cooled products from the molds, the stone material is heated to a softening temperature, "flow" under load (for diabase - 1100 ° C, and for certain types of stones - 850 ° C), a dose of heated material is placed in a specially introduced squeezing chamber, and then this material is extruded (extruded) into the working cavities of the molds using mechanical pressure Niya.

This solution allows to reduce the energy consumption for heating the stone (the heating temperature is reduced by 400-600 ° C), to reduce the exposure time of products in the molds by reducing the temperature of the material.

Example

The slab of the monument is obtained as follows.

Diabase chips in the form of crumbs from crushed stone production are heated in a gas furnace to 1100 ° C, a predetermined dose of heated chips is poured into the squeezing chamber, and the material is extruded into a mold to obtain a plate under mechanical pressure on a 100-ton press.

During the extrusion process, the amorphous material forms a homogeneous mass and fills the working cavity of the form, forming a monolithic product.

The product is kept in the mold until the temperature drops to 150 ° C, and then removed from the mold.

The finished plate is ground and polished, after which it takes the form of black marble.

Using the invention allows to reduce the cost of manufacturing stone products and organize their mass cost-effective production.

Claims (1)

A method of manufacturing stone products, including heating the stone material, filling the molds with heated material, holding the products in them and then removing the cooled products from the molds, characterized in that the stone material is heated to a softening temperature, "flow" under load, a dose of the heated material is placed in specially introduced squeezing chamber, and then forced out - this material is extruded from it into the working cavity of the mold using mechanical pressure.