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Method for Preparing a Soda-Lime-Silica Glass Basic Formulation and a Method for Extracting Aluminum from Coal Ash for Co-Production of Glass

  • US 20150321946A1
  • Filed: 11/27/2012
  • Published: 11/12/2015
  • Est. Priority Date: 11/27/2012
  • Status: Active Grant
First Claim
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1. A method for preparing a soda-lime-silica glass basic formulation, comprising the steps of:

  • a1) pre-desiliconizing silicon-containing powdery industrial waste with a sodium hydroxide solution, and separating, to obtain a pre-desiliconization mother liquor and residues;

    a2) introducing carbon dioxide to the pre-desiliconization mother liquor for carbonation decomposition, and separating, to obtain a silicic acid precipitate and a sodium carbonate solution;

    a3) drying the silicic acid precipitate to obtain silicon dioxide;

    a4) adding lime milk into the sodium carbonate solution for causticization, and separating, to obtain a calcium carbonate precipitate and a sodium hydroxide solution;

    a5) drying the calcium carbonate precipitate; and

    a6) according to the requirements on the amounts of respective components in the soda-lime-silica glass, using the silicon dioxide prepared in step a3) and part of the dried calcium carbonate from step a5) and adding sodium oxide thereto, to obtain a soda-lime-silica glass basic formulation.

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