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Refractories and use thereof

A refractory product and refractory technology, applied in the field of refractory products and their applications, can solve problems that cannot be solved satisfactorily

Active Publication Date: 2017-08-29
REFRATECHNIK HLDG GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This problem, although known, has so far not been satisfactorily solved

Method used

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Embodiment Construction

[0075] Within the scope of the present invention, according to a particular embodiment, at least one of the abovementioned silicic acids is used. Advantageously, the silicic acid is selected according to its ability to react with the MgO of the magnesia powder, and it is ensured that the silicic acid reacts with the MgO as completely as possible during hardening.

[0076] Finely divided dry silicic acid is added to the dry batch mixture up to 10% by weight, especially 0.5% to 6% by weight.

[0077] According to one embodiment, preferably according to the invention, only water is also added to the above-described dry base batch according to the invention, calculated as 100% by weight, in order to produce the refractory product according to the invention.

[0078] Preferably, the following dry base batches in % by weight are thus combined:

[0079] Coarse-grained magnesium oxide: 30 to 74, especially 40 to 60

[0080] Magnesia powder: 25 to 50, especially 35 to 45

[0081] Re...

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Abstract

The invention relates to a refractory in the form of a dry, mineral batch of fire-resistant mineral materials combined in such a way that refractories which are long-term resistant to fayalite-containing slags, sulfidic melts (mattes), sulfates and non-ferrous metal melts and are used for refractory linings in industrial non-ferrous metal melting furnaces can be manufactured, said refractory at least containing: - at least one coarse-grained magnesia raw material as the main component; - magnesia (MgO) meal; - at least one fire-resistant reagent which, during the melting process, acts (in situ) in a reducing manner on non-ferrous metal oxide melts and / or non-ferrous metal iron oxide melts and converts same into non-ferrous metal melts.

Description

technical field [0001] The invention relates to a refractory product in particular according to DIN ISO / R836, DIN51060, in the form of a dry mineral batch or mixture based on at least one magnesia raw material as a coarse-grained main component, and suitable for Refractory products for the manufacture of linings for furnaces in the non-ferrous metal industry, and in the form of unshaped or shaped refractory products, such as shaped bricks, manufactured from said batches, which are used in furnaces in the non-ferrous metal industry When used, it can resist the erosion of fayalite slag (iron silicate slag), sulfide slag (matte) and sulfate to a large extent, and can resist non-ferrous metal melts for a long time, especially copper melts. Furthermore, the invention relates to unshaped or shaped refractory products produced from said batches in non-ferrous metals industrial furnaces, especially within the range of oxidizing furnace zones, preferably in the slag melting zone of non...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043C04B35/632
CPCC04B35/043C04B35/632C04B2235/48C04B2235/5427C04B2235/80C04B2235/77C04B2235/9676C04B2235/96C04B2235/3418C04B2235/3826C04B2235/422C04B2235/425C04B2235/424C04B35/053C04B35/66C04B2235/40C04B2235/9669C04B35/013C04B35/6316
Inventor 黑尔格·扬森托马斯·舍梅尔沃尔克·斯坦
Owner REFRATECHNIK HLDG GMBH
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