Glazes made from tailings resources and their glazing process

Abstract

The invention discloses a glaze material manufactured by utilization of tailings. The glaze material comprises 40-65% of feldspar, 10-25% of quartz, 15-30% of iron ore mine tailings, 0-10% of limestone, 0-10% of kaolin and 0-10% of bone ash. The glaze material comprises following components by weight: 1-5 parts of K2O, 1-8 parts of Al2O3, 55-70 parts of SiO2, 1-5 parts of P2O5, 1-5 parts of Na2O, 1-8 parts of Fe2O3, 5-15 parts of CaO and 1-8 parts of MgO. The invention also discloses a glazing process of the glaze material manufactured by utilization of the tailings. The glazing process includes: adding the materials into a ball grinder and performing ball-milling, adding water, uniformly mixing, stirring and dissolving to obtain glaze slurry, with the fineness of the glaze slurry being controlled to be less than 0.01% of residue on sieve of a ten-thousand hole sieve; discharging the glaze slurry and stirring; sieving the glaze slurry with a sieve having a size of 200 meshes, applying the fully suspended glaze slurry onto the surface of a green body with the concentration being 38-46 baume degrees and the thickness of the glaze slurry on the surface of the green body being 0.2-1.2 mm; and subjecting the green body to high-temperature sintering, and cooling in furnace to room temperature after the sintering is finished to obtain a ceramic product. By adoption of a one-time sintering process, the product quality can reach that of secondary sintering and the product energy consumption is reduced.

Description

technical field [0001] The invention relates to raw materials for ceramic products, and more particularly relates to a glaze made from tailings resources and a glazing process thereof. Background technique [0002] With the rapid development of the economy and society, people's quality of life is improving day by day, and the concept of consumption is also constantly changing, requiring that ceramic products should not only be practical, but also artistic and ornamental. The existing glaze color can be divided into high temperature glaze and low temperature glaze according to the firing temperature; according to the appearance characteristics, it can be divided into transparent glaze, opacity glaze, colored glaze, glossy glaze, matte glaze, crackle glaze (open sheet), crystal glaze and so on. [0003] K based on ceramic production 2 O-AL 2 o 3 -SiO 2 The phase diagram of the ternary system and the color development principle of iron oxides under different conditions: the...

AI Technical Summary

Problems solved by technology

[0004] my country is rich in iron ore resources and has a huge reserve. After mining and purification, the tailings slag has not been used. The tailings slag produced in the country exceeds 100 million tons every year. As much as 4 million tons, these tailings are piled up like a mountain, which not only seriously pollutes the surrounding area, but also wastes a lot of resources

Tailings occupy a large amount of land, causing water and soil erosion and environmental pollution, and it is urgent to solve them. Therefore, it is urgent to develop a practical technology that can use large quantities of tailings for reproduction to solve the comprehensive utilization of tailings.

[0005] In the current production, in order to achieve stable color, no color difference, and reduce glaze defects, colored glaze ceramic products generally adopt a second firing process. The disadvantage of this production method is that the green body is first bisque fired to eliminate The structural water and organic matter in the green body make the carbonate decompose and discharge gas to avoid pinholes in the glaze layer; the surface color and pattern effect change less, because all colors are obtained by coloring the clay material, so there are fewer types of colors, plus Due to the limitation of the fabric method during production, only some fixed patterns can be produced, and the pattern changes are single