Tinted glass produced by using chromium-containing waste slag and method for producing the same

Abstract

The invention relates to a colored glass prepared by substances with chromate residue, which is characterized in that the material compositions and weight percentage include 1-70 percent of the chromate residue, quartz sand with SiO2 content no less than 90 percent as well as one or a plurality of quartzite, silica sand, sand stone of 10-56 percent, one or a plurality of boric acid, borax, ascharite, bechilite of 5-30 percent and one or a plurality of soda caustic soda and mirabilite of 2-15 percent, etc; the material compositions and weight percentage further include coloring regulator and nucleating agent. The preparation method of the colored glass comprises preparing batch, melting the glass; the method further comprises processing crystallization, quenching, coloring and diluting as well as the glass forming, annealing and so on. By adopting the method, a plurality of types of glass such as aventurine glass and so on can be prepared and the glass can be directly used as the colored glass of building decorative glass; the quenching glass can be also used as pigment for producing glass nesting, common green glass, mosaic, ceramic glaze and so on, thus solving the problem of the environmental pollution cause by Cr<6 plus> in the chromate residue.

Description

technical field [0001] The invention belongs to glass containing solid waste and a preparation method thereof, and relates to colored glass prepared by using chrome-containing waste residue and a preparation method thereof. It is suitable for preparing colored glass including Jinxing glass and used as building decoration materials with chromium-containing waste residue as the main raw material. Background technique [0002] Chromium-containing waste residue (hereinafter referred to as chromium residue) is the residue of chemical raw materials such as industrial chromium salts, represented by SiO 2 , CaO, MgO, Fe 2 o 3 、Al 2 o 3 etc. as the main components, while remaining Cr 3+ 、Cr 6+ , where Cr 6+ It 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+ ox...

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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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