Preparation method of ardealite baked brick

Abstract

The invention discloses a preparation method of an ardealite baked brick. The ardealite baked brick is prepared by the following steps of: taking ardealite, a shaping adhesive, a catalytic intensifier and a melting point depressing intensifier as raw materials, and crushing, mixing, shaping and drying and baking in a kiln according to a conventional process to obtain an ardealite baked brick, wherein the shaping adhesive is clay or shale, the catalytic intensifier is an iron-contained compound, and the melting point depressing intensifier is fluosilicate. The weight ratio of the ardealite to the shaping adhesive to the catalytic intensifier to the melting point depressing intensifier is 55-80:16-41:1-2:1-4, and the baking temperature is 700-870 DEG C. The invention not only solves the problem that sulfur dioxide generated in high-temperature sintering of the ardealite pollutes the environment but also can reduce the sintering temperature and reduce energy consumption.

Description

technical field

[0001] The invention relates to a novel wall production technology, in particular to a method for preparing sintered bricks with phosphogypsum as the main raw material. Background technique

[0002] Phosphate and compound fertilizer industry produces 1 ton of phosphoric acid (100% P 2 o 5 ) will produce about 5-6 tons of phosphogypsum. A medium-sized phosphogypsum production enterprise discharges about 1 million tons of phosphogypsum waste residue a year. How to deal with the utilization has always been a difficult problem that plagues the wet-process phosphoric acid industry. Although some phosphogypsum can be used to replace natural gypsum to produce construction gypsum powder, cement retarder, gypsum board and other building material products, the amount of phosphogypsum is far from solving the problem of phosphogypsum outlet compared with the phosphogypsum emission in the wet-process phosphoric acid industry. Moreover, the land occupation problem of ph...