The influence of ortho-phosphoric acid and kaolin on the properties of unburnt refractory material

Authors

DOI:

https://doi.org/10.15587/2312-8372.2015.47001

Keywords:

unburnt refractories, phosphate binder, kaolin, mullite-corundum products shards

Abstract

This thesis investigates the development of a composition of unburnt refractories based on shards of high-alumina refractory products and sintered corundum, kaolin and ortho-phosphoric acid. The experiment was carried out to determine physical and mechanical properties of the developed compositions. The analyzed results show that 7-9 % ortho-phosphoric acid content allows to receive the best properties specimen. It was also identified that the quantity of ortho-phosphoric acid influences the physical and mechanical properties of high-alumina samples both after heat treatment and after hard firing. In addition the experiment shows that the interaction of kaolin and ortho-phosphoric acid leads to the formation of combinations, which provide high mechanical strength to the obtained refractory material. The use of the ortho-phosphoric acid for such products manufacturing significantly simplifies the manufacturing technology of refractory materials, excludes their hard firing, cuts process losses and reduces finished material costs. The paper shows the perspective for production of the unburnt mullite-corundum refractories with improved operational properties based on the shards of mullite-corundum products, sintered corundum, kaolin as a clay bond and ortho-phosphoric acid as a phosphate binder.

Author Biographies

Юлія Вячеславівна Харибіна, National Technical University «Kharkiv Polytechnic Institute», 21, Frunze str., 61002, Kharkiv

Postgraduate

Department of the technology of ceramics, refractories, glass and enamels

Ярослав Миколайович Пітак, National Technical University «Kharkiv Polytechnic Institute», 21, Frunze str., 61002, Kharkiv

Doctor of Technical Sciences, Professor

Department of the technology of ceramics, refractories, glass and enamels

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Published

2015-07-23

How to Cite

Харибіна, Ю. В., & Пітак, Я. М. (2015). The influence of ortho-phosphoric acid and kaolin on the properties of unburnt refractory material. Technology Audit and Production Reserves, 4(4(24), 4–6. https://doi.org/10.15587/2312-8372.2015.47001

Issue

Vol. 4 No. 4(24) (2015): Technologies of food, light and chemical industry

Section

Technologies of food, light and chemical industry

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Copyright (c) 2016 Юлія Вячеславівна Харибіна, Ярослав Миколайович Пітак

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