Colored glass prepared by using chromium-containing waste residue and its preparation method

Abstract

A colored glass prepared by using chromium-containing waste residue, characterized in that the raw material composition and weight percentage include: 1-70% of chromium residue, one of quartz sand, quartzite, silica sand and sandstone with SiO2 content not less than 90% or more than 10% to 56%, one or more of boric acid, borax, boronite, boronite, 5% to 30%, one or more of soda ash, caustic soda, Glauber’s salt 2 to 15%, etc.; further It also includes coloring regulators and crystal nucleating agents. The preparation method of the colored glass of the present invention includes preparation of batch materials, glass melting, and further includes the steps of crystallization treatment, rapid cooling, coloring dilution, glass forming and annealing. The present invention can be used to prepare multiple varieties of Venus glass, colored glass that can be directly used as architectural decorative glass, and the quenched glass block can also be used as a coloring material for the production of glass casing materials, ordinary green glass, mosaics, ceramic glazes, etc. , so as to solve the pollution of Cr6+ in the chromium slag to the environment.

Description

Technical field [0001] The invention belongs to glass containing solid waste and a preparation method thereof, and relates to a colored glass prepared by using chromium-containing waste residue and a preparation method thereof. It is suitable for using chromium-containing waste residue as the main raw material to prepare colored glass including Venus glass, which is used as building decoration material. Background technique [0002] Chromium-containing waste residue (hereinafter referred to as chromium slag) is the residue of industrial chromium salt and other chemical raw materials, with SiO 2 , CaO, MgO, Fe 2 O 3 , Al 2 O 3 Etc. as the main component, while residual Cr 3+ , Cr 6+ , Of which Cr 6+ Mainly exists in compounds including soluble sodium chromate and acid-soluble calcium chromate (the composition of chromium slag generally contains 10-30% by weight of SiO 2 , 20-30% CaO, 6-25% MgO, 6-25% Fe 2 O 3 , 5-22% Al 2 O 3 , And 0.5-4.5% Cr 3+ And Cr 6+ The oxides are all useful...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there are mainly three methods for the processing and utilization of chromium slag: adopt the reduction method to 6+ reduced to Cr 3+ 1. The chemical precipitation method is used to extract the chromium element in the chromium slag, and the chromium slag is used as a raw material to manufacture ceramic products so that the chromium element is sealed by the vitreous film on the surface of the chromium slag particle; however, the reduction method needs to consume a large amount of reducing agent, and the reduction is not complete. It will also produce secondary pollution (air pollution, etc.); the precipitation method produces a large amount of waste water, which contains Cr 6+ , also causes secondary pollution, and solid waste exists as usual; when manufacturing ceramic products, the firing temperature cannot be too high, otherwise the product will be deformed, and at a lower temperature Cr 6+ It is not easy to participate in the reaction, and the vitreous body has a high viscosity, which cannot completely seal the chromium slag particles. When it is eroded by water, there are still Cr 6+ Dissolved in water, causing serious environmental pollution

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