A kind of imitation marble decorative plate and preparation method thereof

Abstract

The invention discloses a marble-texture-imitation decorative board and a preparation method thereof. The marble-texture-imitation decorative board is prepared from following raw materials, by weight, 30-80 parts of phosphogypsum, 15-60 parts of yellow phosphorus furnace slag and 0.1-10 parts of quick lime. The preparation method mainly includes following steps: mixing the yellow phosphorus furnace slag with a less amount of the phosphogypsum and performing a stir-reaction at a certain temperature and grinding a reaction product to obtain phosphorus slag powder; and mixing and aging the residual phosphogypsum and the phosphorus slag powder to obtain a mixture material; pouring the mixture material into a die to form a phosphogypsum base material; performing vapor maintenance to the formed phosphogypsum base material; spraying a marble-texture paint onto the phosphogypsum base material and drying the painted phosphogypsum base material. The preparation method is simple and convenient to operate. The produced marble-texture-imitation decorative board is light in weight, is good in water and fire resistance, is high in compressive strength and is strong in weather resistance. The decorative board can be widely used as an indoor / outdoor decorative material.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a marble-like decorative board and a preparation method thereof. Background technique [0002] In the phosphoric acid production process, every ton of P produced 2 o 5 Five tons of phosphogypsum are produced by-product, and the annual by-production of phosphogypsum by medium-sized phosphoric acid production enterprises is about 3.5 million tons. So much phosphogypsum not only requires a large slag dump, but also causes water pollution. At present, the most commonly used phosphogypsum treatment methods are as follows: [0003] The first method: Phosphoric acid paste is used to backfill the pit. According to statistics, when phosphogypsum is not used to backfill the mine shaft, the filling cost of the mine shaft accounts for 1 / 3 of the mining, and the filling material accounts for 80% of the filling cost. If phosphogypsum is used to fill the mine shaft, the filling c...

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Problems solved by technology

The crystal form of phosphogypsum is the same as that of natural gypsum, which is a prismatic or columnar plate crystal, and its chemical composition is basically similar to that of natural gypsum. Phosphorus and organic impurities will prolong the hydration time of cement, reduce the early strength and prolong the setting time, so phosphogypsum cannot be directly used as a retarder for cement

Phosphogypsum needs to be processed. The current common method is to process phosphogypsum through washing, pretreatment, drying and calcination. This method is low in cost to obtain cement retarder, but the process of producing cement retarder from phosphogypsum is long. , the equipment investment is large, and the flocculant still inevitably contains phosphorus pentoxide and fluoride, which makes the hydration time and coagulation time of cement longer

[0005] The third method: making ammonium sulfate and calcium carbonate from phosphogypsum. This method uses ammonia and carbon dioxide to convert phosphogypsum into ammonium sulfate and calcium carbonate. Big

At present, phosphogypsum is usually mixed with a small amount of cement, pulp, fiber reinforced materials, etc., and then pressurized to make phosphogypsum fiberboard. Because phosphogypsum itself does not have gelling properties, high water content, and contains various impurities, etc. , the wear resistance, weather resistance, compressive strength and other properties of the phosphogypsum imitation marble pattern decorative board produced by this method are low, and it is difficult to meet the use requirements of building decoration materials

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