Glaz-use potassium feldspar powder and preparation method thereof

Abstract

The invention discloses a glaze-use potassium feldspar powder. The glaze-use potassium feldspar powder is prepared from the following raw materials: by weight, 3-3.5 parts of white potassium feldspar, 3-3.5 parts of yellow potassium feldspar and 2-3 parts of grey potassium feldspar. The raw materials are mixed to obtain a mixture, and then the glaze-use potassium feldspar powder is obtained through homogenizing, grinding, and purifying of the mixture. The glaze-use potassium feldspar powder comprises the following chemical compositions: by weight, 73-76 parts of silicon dioxide, 12-15 parts of aluminum oxide, 9.5-11 parts of potassium oxide, 0.1-0.5 parts of sodium oxide and 0.05-0.2 parts of ferric oxide. The glaze-use potassium feldspar powder with low sodium content can reduce sintering temperature, shorten sintering time, reduce energy consumption, and improve product yield and product quality and the like. In manufacturing processes of ceramic, glass and the like, usage amount of chemical raw materials can be reduced through increase of the usage amount of the potassium feldspar powder, the usage amount of the potassium feldspar powder is increased from the original about 10% up to 30-50%, and the production cost of the ceramic, glass and the like can be reduced, requirements of customers can be meet.

Description

technical field [0001] The present invention relates to a potassium feldspar powder for glaze, in particular to a low-sodium potassium feldspar powder for glaze for producing high-grade ceramic frit, and also relates to a glaze for producing high-grade ceramic frit A method for preparing low-sodium potassium feldspar powder. Background technique [0002] The chemical formula of potassium feldspar is K(AlSi 3 o 8 ), the crystal belongs to monoclinic or triclinic silicate minerals, because of its low melting temperature, it can reduce the firing temperature of products and promote the dissolution of other minerals in feldspar, so it is widely used in ceramics, glass and other industries application. [0003] The existing potassium feldspar melting temperature range is relatively narrow, which makes it difficult to control the product under high temperature conditions. When used as a raw material in the ceramic frit industry, the high sodium and aluminum content in pot...

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Problems solved by technology

[0003] The existing potassium feldspar melting temperature range is relatively narrow, which makes it difficult to control the product under high temperature conditions. When used as a raw material in the ceramic frit industry, the high sodium and aluminum content in potassium feldspar limits the ceramic frit. The amount of potassium feldspar raw materials added in the block formula is generally about 10%. In order to lower the melting temperature, a certain amount of chemical raw materials must be added, such as potassium carbonate and potassium nitrate, and the relative price of chemical raw materials is relatively high. Then the production cost of the ceramic frit is increased, resulting in the problem of low economic benefit

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