Method for preparing black cobalt-based ceramic pigment by utilizing tannery sludge

Abstract

The invention discloses a method for preparing cobalt-based black ceramic pigment by utilizing tannery sludge. Leather industrial waste is employed and comprises the following components, by weight: 40-60% of tannery sludge, 20-30% of iron oxide red, 5% of nickel oxide and 15-20% of cobalt oxide. The tannery sludge is calcined and sieved in a non-oxidizing atmosphere for later use, and then the processed tannery sludge and other components are blended, mixed, calcined and crushed to obtain a product. The invention also discloses black ceramic pigment prepared by the preparation method. The method can be used for preparing the ceramic pigment for the black glaze, wherein the pigment is high in blackness, pure in color and stable.

Description

technical field

[0001] The invention relates to a production method of a cobalt-based black ceramic pigment capable of reducing production costs, and belongs to the technical field of ceramic pigment preparation. Background technique

[0002] Black ceramic pigment is a very important pigment in decorative materials. Black glaze is favored by people for its pure and dignified decorative effect, and is even regarded as a treasure by high-end decorators. Generally, crystal coloring is used to prepare black pigments: chromium, iron, manganese, nickel, copper, cobalt and other metal oxides form isomorphic mixed spinel crystals. Although this black pigment and glaze are not affected by the firing atmosphere, However, with the soaring price of oxides, the mass production and application of this black material are limited. Therefore, using industrial waste residues to reduce the production cost of black ceramic pigments has become a market demand. Contents of the invention [00...

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