Method for producing a raw material for the production of refractory ceramic products, a raw material produced according to the method and a raw material for producing refractory ceramic products

Patent metadata

Field	Value
Publication number	US-10233122-B2
Application number	US-201615556931-A
Country	US
Kind code	B2
Filing date	Mar 23, 2016
Priority date	May 28, 2015
Publication date	Mar 19, 2019
Grant date	Mar 19, 2019

Abstract

The invention relates to a method for producing a raw material for the production of refractory ceramic products, a raw material produced by said method, and a raw material for producing refractory ceramic products.

First claim

The invention claimed is:

1. Method for producing a raw material for the production of refractory ceramic products that comprises the following steps:
provision of a raw material containing Cr(VI) that is present to at least 50% by weight in a particle size greater than 50 μm;
provision of ascorbic acid;
provision of water;
combining of the raw material containing Cr(VI) with the ascorbic acid and the water;
mixing of the raw material containing Cr(VI) with the ascorbic acid and the water;
drying of the raw material containing Cr(VI); wherein the method is carried out such that the particle size of the raw material containing Cr(VI) does not change or does not change significantly during the course of the method.

2. Method as claimed in claim 1 , in which the raw material containing Cr(VI) is provided in the form of used refractory ceramic products.

3. Method as claimed in claim 1 , in which the raw material containing Cr(VI) is provided with a content of Cr(VI) of at least 500 ppm.

4. Method as claimed in claim 1 , in which after drying, the raw material containing Cr(VI) has a content of Cr(VI) of less than 500 ppm.

5. Method as claimed in claim 1 , in which after drying, the raw material containing Cr(VI) is provided as a raw material for the production of refractory ceramic products.

Assignees

• Refractory Intellectual Property Gmbh & Co Kg

Inventors

• Budna Karl
• Deutsch Thomas
• Neubock Rainer

Classifications

• C04B35/632

  Organic additives · CPC title

• C04B2235/449

  Organic acids, e.g. EDTA, citrate, acetate, oxalate · CPC title

• C04B2235/725

  Metal content · CPC title

• C04B35/62695

  Granulation or pelletising (devices for shaping artificial aggregates from ceramic mixtures B28B1/004) · CPC title

• C04B35/66

  Monolithic refractories or refractory mortars, including those whether or not containing clay {(making or repairing of linings F27D1/16)} · CPC title