A kind of speckled glass-ceramic directly using molten blast furnace slag and its preparation method

Abstract

The invention discloses marbled glass ceramics directly employing fusion blast furnace slag and a preparation method of the marbled glass ceramics. The marbled glass ceramics comprises the following raw materials, by mass, 55-75 parts of blast furnace slag flux and 25-45 parts of auxiliary material flux; and auxiliary materials comprise the following components, by mass, 8.5-19.5 parts of quartz sand, 0.5-5.5 parts of limestone, 1-5 parts of sodium carbonate, 2-5 parts of potassium carbonate, 1-4 parts of zinc oxide, 1-4 parts of ammonium di-hydrogen phosphate, 1-2 parts of spodumene, 2.5-5 parts of sodium fluosilicate, 0.5-1.5 parts of sodium fluoroaluminate and 0.5-1 part of borax. The preparation method is characterized in that through controlling the mixed melting temperature and time of the blast furnace slag flux and the auxiliary material flux, a flux mixture is obtained; through forming, annealing and microcrystallization heat treatment, the marbled glass ceramics is obtained. The molten blast furnace slag and the auxiliary materials are mixed in a flux form and the flux mixture having certain micro-inhomogeneity is obtained accurately, then with the combination of subsequent forming and heat treatment technologies and the like, the marbled glass ceramics is obtained, so that the technology is easy to implement, and the influence of uncertainty on a product in a mixing process is reduced.

Description

technical field [0001] The invention provides a patterned glass-ceramic directly using molten blast furnace slag and a preparation method thereof, and the content relates to the field of resource utilization of waste. Background technique [0002] Blast furnace slag glass-ceramics is a kind of polycrystalline solid material containing a large number of microcrystalline phases and glass phases, which is obtained by controlling the temperature rise system during the heating process. This kind of material has the characteristics of high mechanical strength, excellent cutting performance, good wear resistance, high hardness, good thermal stability, acid and alkali corrosion resistance, etc. It is widely used in various architectural decoration projects, and in many cases It can replace marble, granite and other natural stones, and has good development and application prospects. [0003] The temperature of molten blast furnace slag is above 1400℃, which is a good waste heat reso...

AI Technical Summary

Problems solved by technology

In the glass melting process, in order to ensure the uniformity of the glass, it takes a long time and huge energy consumption to complete the clarification and homogenization of the glass liquid, followed by a large amount of external supplementary heat source consumption

On the other hand, since the molten blast furnace slag contains Fe and a small amount of other metal elements remaining after ironmaking, these metal elements will produce a deep coloring of the homogenized molten glass, resulting in the current use of blast furnace slag as the main raw material for the preparation of micro The color of crystal glass is uniform and single (black or gray). Some products pass the selection of crystal nucleating agent (such as calcium fluoride) and increase the addition of crystal nucleating agent. The final prepared glass-ceramic product is white or light yellow.

Although reducing the proportion of blast furnace slag added will improve the color of the glass-ceramics, the utilization efficiency of blast furnace slag will also decrease accordingly.

[0005] At present, the glass-ceramic for architectural decoration produced by molten blast furnace slag has a single color tone, simple pattern or even no pattern, which affects its decorative effect and reduces the added value of this type of product.

At the same time, it takes a long time to homogenize the blast furnace slag and auxiliary material melt, and a large amount of heat needs to be supplemented externally, which reduces the profit of the production enterprise.

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