Large-scale production process for paper surface gypsum boards with annual yield scale being 50 million square meters

Abstract

The invention discloses a large-scale production process for paper surface gypsum boards with the annual yield scale being 50 million square meters, which comprises the following steps that: 100 percent of industrial byproduct gypsum (desulfurization gypsum and phosphor gypsum) are used as raw materials to be subject to graded storage and prehomogenization, conveyance metering, fast baking and calcination, graded modification, pneumatic homogenization and proportioning forming, a programmable logic controller (PLC) of a Mitsubishi newest QU series central processing unit (CPU) is used as a main control element, and the automatic control production of the flow line of the paper surface gypsum boards is realized. The production process has the advantages that the production and forming speed of the paper surface gypsum boards reaches 100m / min, the annual yield scale reaches 50 million square meters, and the production process breaks through the limitation of the foreign process technology.

Description

1. Technical field [0001] The invention relates to the technical field of equipment for gypsum building decoration materials, in particular to a process for producing gypsum boards by rapid prototyping using 100% industrial by-product gypsum (desulfurized gypsum and phosphogypsum) as raw materials. 2. Background technology [0002] Domestic gypsum board production generally takes a scale of 20-30 million m 2 Mainly, the production molding speed is 40-60m / min. In the use of raw materials, the use of heat sources, and the specific automatic control system, batching, molding, cutting, belt closing, edge sealing, waste board return and other technical links, it cannot break through the existing Technical bottleneck, so there is no large-scale gypsum board equipment technology and achieve foreign advanced production level. In recent years, the rapid development of the domestic green and environmentally friendly decorative building materials market has led to a situation in which...

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Problems solved by technology

The annual production capacity of single-line equipment of these enterprises has reached 20-30 million m 2 , except for Taishan gypsum, most rely on the introduction of complete sets, or foreign direct investment. Foreign production lines are superior to domestic production lines in terms of scale and technology, but the disadvantages are: high fuel and gas energy consumption, large investment, long construction period, and difficult operation and maintenance.

Taishan Gypsum has previously developed a medium-sized production line using industrial by-product gypsum (desulfurized gypsum, phosphogypsum) as raw materials, with a molding speed of 40-60m / min. The production process of 50 million square meters of large-scale gypsum board is still blank

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