Dense, granular alkaline earth metal carbonate and alkali metal salt composition for use in glass manufacture
AssigneeChemical Products Corporation
InventorsCharles Adams, Jr., Jerry A. Cook
Life of this patent
Estimating the term…
Abstract
A novel alkaline earth metal carbonate product for use as a raw material in the glass manufacturing process is disclosed. The alkaline earth metal carbonate becomes a part of the liquid phase in the glass furnace more readily and at a lower temperature; it decomposes to release carbon dioxide gas more rapidly so that all of the gas can escape from the molten glass more easily. Using these alkaline earth metal carbonate compositions, the production capacity of a glass furnace is increased.
Claims20
A method of manufacturing dense, granular alkaline earth metal carbonate materials for use as glass furnace raw materials comprising
- a. admixing a fine particle size form of one or more alkaline earth metal carbonates where (substantially all particles are smaller than about 0.1 millimeter equivalent spherical diameter with at least 5 weight percent water,
- b. adding one or more alkali metal compounds to the admixture in an amount sufficient to provide at least about 0.2 gram atomic weight of alkali metal for each gram molecular weight of alkaline earth metal carbonate present,
- c. mixing the admixture for a time sufficient to allow at least a portion of the alkali metal salts to dissolve in the water that is present,
- d. drying the resultant mixture to produce granules, and
- e. classifying the dried mixture and grinding if necessary to insure that most of the granules are between about 0.1 millimeter and about 1.0 millimeter in size.
A method of manufacturing dense, granular alkaline earth metal carbonate materials for use as glass furnace feedstock comprising:
- a. precipitating barium and/or strontium carbonate crystals from a barium and/or strontium ion containing solution,
- b. filtering and washing the barium and/or strontium carbonate precipitate to produce a filter cake,
- c. adding one or more alkali metal compounds to the berium and/or strontium carbonate filter cake in an amount sufficient to provide at least about 0.2 gram atomic weight of alkali metal for each gram molecular weight of alkaline earth metal carbonate present,
- d. mixing the admixture for a time sufficient to achieve homogeneity and allow at least a portion of the alkali metal compounds to dissolve in residual water that is present in the cake,
- e. mixing the wet admixture of step (d) with an amount of the same material that has already been dried to form a crumbly, damp, less sticky mass,
- f. drying the crumbly, damp admixture, and
- g. crushing the dried admixture which contains oversized granules to insure that all granules are smaller than about 1.0 millimeter in size.
A method of manufacturing dense, granular alkaline earth metal carbonate materials for use as glass furnace raw materials that improve the performance of the glass furnace comprising
- a. admixing a fine particle size form of one or more alkaline earth metal carbonates with one or more alkali metal compounds in aqueous solution form a plastic mass containing at least 0.2 atomic weight of alkali metal for each molecular weight of alkaline earth metal carbonate,
- b. mixing for a time sufficient to achieve homogeneity;
- c. drying the resultant mixture under conditions such that the bulk of the product does not reach a temperature over about 700.degree. C.,
- d. grinding any large particles to achieve a product with a maximum particle size of about 1 millimeter.
Dependencies are inferred from the claim text.