Zinc lignosulfonate stabilizing binder solution for magnesium oxide refractory forming mixtures and method
阅读：57发布：2023-06-28
专利汇可以提供Zinc lignosulfonate stabilizing binder solution for magnesium oxide refractory forming mixtures and method专利检索，专利查询，专利分析的服务。并且Refractory shapes containing magnesium oxide are pressed from a refractory forming mixture which consists of particulate refractory material containing magnesium oxide and a binder solution of zinc lignosulfonate in water. The use of zinc lignosulfonate in solution as a binder stabilizes the refractory forming mixture, to substantially prevent the loss of density of refractory shapes as the refractory forming mixture ages. Zinc may alternatively be provided in the binder solution by adding a zinc compound to a binder solution composed of water and lignosulfonate salt, the zinc compound dissociating in solution to provide zinc ions. A refractory forming mixture is prepared by mixing zinc lignosulfonate, water, and particulate refractory material containing magnesium oxide, or by mixing a lignosulfonate salt, water, a zinc compound which dissociates in solution to provide zinc ions, and particulate refractory material containing magnesium oxide.，下面是Zinc lignosulfonate stabilizing binder solution for magnesium oxide refractory forming mixtures and method专利的具体信息内容。
1. A REFRACTORY FORMING MIXTURE SUITABLE FOR PRESSURES FORMING INTO REFRACTOORY SHAPES, CONSISTING ESSENTIALLY OF: A. ABOUT 90% TO ABOUT 98% BY WEIGHT PARTICULATE REFRACTORY MATERIAL CONTAINING MAGNESIUM OXIDE, AND B. ABOUT 2% TO ABOUT 10% BY WEIGHT OF DENSIFYING BINDER SOLUTION INTERMIXED WITH SAID PARTICULATE REFRACTORY MATERIAL, SAID BINDER SOLUTION CONSISTING ESSENNTIALLY OF A SOLUTION OF ZINC LIGNOSULFONATE AND WATER, SAID ZINC LIGNOSULFONATE BEING PRESENT IN AN AMOUNT SUFFICIENT TO STABILIZE THE REFRACTORY FORMING MIXTURE FOR UP TO ABOUT 3 HOURS AT AGING TEMPERATURES ABOVE 35*C TO PREVENT SUBSTANTIAL LOSS OF DENSITY OF REFRACTORY SHAPES PRESSED FROM THE REFRACTORY FORMING MIXTURE, THE WATER BEING FROM ABOUT 1% AND NOT EXCEEDING ABOUT 5% BY WEIGHT OF THE REFRACTORY MATERIAL.
2. The refractory forming mixture as specified in claim 1 wherein said particulate refractory material includes a chromium refractory compound.
3. A refractory mixture suitable for pressure forming into refractory shapes, consisting essentially of: a. about 90% to about 98% by weight particulate refractory material containing magnesium oxide; and b. about 2% to about 10% by weight of densifying binder solution intermixed with said particulate refractory material, said binder solution consisting essentially of a solution of a zinc compound and a lignosulfonate salt, other than zinc lignosulfonate, in water, said zinc compound being selected from the group consisting of zinc compounds which provide zinc ions in a water solution containing said lignosulfonate salt and being contained in said binder solution in an amount sufficient to provide at least about 0.9% zinc ions based on the weight of said salt and sufficient to stabilize the refractory forming mixture for up to about 3 hours at aging temperatures above 35*C to prevent substantial loss of density of refractory shapes pressed from the refractory forming mixture, the water being from about 1% and not exceeding about 5% by weight of the refractory material.
4. THE REFRACTORY FORMING MIXTURE AS SPECIFIED IN CLAIM 3 WHEREIN SAID BINDER SOLUTION CONTAINS AT LEAST ABOUT 1.0% ZINC ON THE WEIGHT OF SAID LIGNOSULFONATE SALT.
5. A refractory forming mixture suitable for pressure forming into refractory shapes, consisting essentially of: a. about 90% to about 98% by weight particulate refractory material containing magnesium oxide; and b. about 2% to about 10% by weight of a densifying binder solution intermixed with said particulate refractory material, said binder solution consisting essentially of a solution of a zinc compound and a lignosulfonate salt, other than zinc lignosulfonate, in an acidic water solution, said zinc compound being selected from the group consisting of zinc compounds which provide zinc ions in an acidic water solution containing said lignosulfonate salt and being contained in said binder solution in an amount sufficient to provide at least about 0.9% zinc ions based on the weight of said salt and sufficient to stabilize the refractory forming mixture for up to about 3 hours at aging temperatures above 35*C to prevent substantial loss of density of refractory shapes pressed from the refractory forming mixture, the water being from about 1% and not exceeding about 5% by weight of the refractory material.
6. THE REFRACTORY FORMING MIXTURE AS SPECIFIED IN CLAIM 5 WHEREIN SAID BINDER SOLUTION CONTAINS AT LEAST ABOUT 1.0% ZINC ON THE WEIGHT OF SAID LIGNOSULFONATE SALT.
7. The refractory forming mixture as specified in claim 5 wherein said zinc compound consists of zinc oxide.
8. A method of making refractory forming mixture containing magnesium oxide suitable for pressure forming into refractory shapes, comprising: mixing with water a lignosulfonate salt, other than zinc lignosulfonate, a zinc compound selected from the group of zinc compounds which provide zinc ions in a water solution containing said lignosulfonate salt, and particulate refractory material containing magnesium oxide, in a proportion by weight of between about 2% and about 10% of the densifying combination of said water, lignosulfonate salt and zinc compound, and between about 90% to 98% of said refractory material, said zinc compound being present in an amount sufficient to provide at least about 0.9% zinc ions based on the weight of said salt and sufficient to stabilize the refractory forming mixture for up to about 3 hours at aging temperatures above 35*C to prevent substantial loss of density of refractory shapes pressed from the refractory forming mixture, the water being from about 1% and not exceeding about 5% by weight of the refractory material.
9. The method of making refractory forming mixture as specified in claim 8 wherein said zinc compound is selected from the group consisting of zinc chloride and zinc sulfate and wherein said lignosulfonate salt is selected from the group consisting of calcium lignosulfonate and sodium lignosulfonate.
10. The method of making refractory forming mixture as specified in claim 8 wherein said zinc compound, said lignosulfonate salt, and said particulate refractory material are mixed with an acidic water solution, and wherein said zinc compound is selected from the group consisting of zinc compounds which provide zinc ions in an acidic water solution containing said lignosulfonate salt.
11. The method of making refractory forming mixture as specified in claim 10 wherein said zinc compound is zinc oxide.
12. A method of making refractory forming mixture containing magnesium oxide suitable for pressure forming into refractory shapes, comprising: mixing with water zinc lignosulfonate and a particulate refractory material containing magnesium oxide, in a proportion by weight of between about 2% and about 10% of the densifying combination of said water and zinc lignosulfonate, and between about 90% to 98% of said refractory material, to yield a refractory forming mixture, said zinc lignosulfonate being containeD in said refractory forming mixture in an amount sufficient to stabilize the refractory forming mixture for up to about 3 hours at aging temperatures above 35*C to prevent substantial loss of density of refractory shapes pressed from said refractory forming mixture, the water being from about 1% and not exceeding about 5% by weight of the refractory material.
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