Environmental-protective stone-imitation floor and preparation method thereof

Abstract

The invention discloses an environmental-protective stone-imitation floor and a preparation method thereof and belongs to the technical field of building materials. The stone-imitation floor is prepared from following raw materials, by weight: 40-60 parts of phosphogypsum, 15-30 parts of yellow phosphorus furnace slag, 1-3 parts of a coagulant, 0.1-2 parts of fibers and 4-8 parts of quick lime. In the invention, the stone-imitation floor is prepared with the phosphogypsum, the yellow phosphorus furnace slag and the quick lime as the raw materials, so that a problem that the waste phosphogypsum is stacked just like mountains can be solved. The invention has an important significance on environment protection and sustainable development. The raw materials are wide-range in sources and low in cost so that the stone-imitation floor is low in production cost. The stone-imitation floor is light in weight, is good in water and fire resistance, is high in compressive strength and is strong in weather resistance, and 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 an environment-friendly imitation stone floor 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...

AI Technical Summary

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 phosphogypsum environmental-friendly imitation stone floor produced by this method has low wear resistance, weather resistance, compressive strength and other properties, and it is difficult to meet the use requirements of building decoration materials

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