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Semi-dry production method for mechanically and continuously preparing ardealite building block, and ardealite building block

A production method and technology of phosphogypsum, which is applied in the field of phosphogypsum blocks, can solve problems such as inability to carry out continuous production, lower production line efficiency, and restrict production efficiency, and achieve the effects of improving mechanization, increasing production efficiency, and increasing the pass rate

Active Publication Date: 2021-10-01
遵义汉丰装饰材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the existing semi-dry method of preparing phosphogypsum blocks greatly shortens the traditional production cycle, the pressing and molding process still takes 3-5 minutes, which still restricts production efficiency and cannot be used for continuous production. After molding, auxiliary drying is still required , reducing the efficiency of the entire production line and increasing production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A semi-dry production method for mechanized and continuous preparation of phosphogypsum blocks, comprising the following steps:

[0037] 1) Material preparation: Prepare 100 parts of fried phosphogypsum powder, 25-30 parts of water and an appropriate amount of auxiliary agent according to the weight ratio. Auxiliaries include polymer water-retaining agents, water-reducing agents, dispersants, retarders and reinforcing agents. Among them, the polymer water-retaining agent is 0.01-0.3 parts. Polymer water retaining agent, referred to as SAP, can absorb water much larger than its own weight, its water absorption rate is 100-1000 times its own weight, and has a strong water retention capacity, so it is also called super water retaining agent High water retention agent. Polymer water retaining agents include starch type, cellulose type and resin type, specifically polyacrylate, acrylic acid copolymer, polyvinyl alcohol, etc. The fineness of polymer water retaining agent i...

Embodiment 2

[0101] The difference technical feature of this embodiment 2 and embodiment 1 is:

[0102] A semi-dry production method for mechanized and continuous preparation of phosphogypsum blocks, comprising the following steps:

[0103] 1) Material preparation: Calculated by weight, prepare 100 parts of fried phosphogypsum powder, 25 parts of water, 0.01 part of polymer water-retaining agent, 0.1 part of water-reducing agent, 0.1 part of dispersant, 0.1 part of retarder, reinforcement 0.2 part of the agent; the fineness of the water-retaining agent is 20 mesh, and the water absorption rate is 100 times of its own weight.

[0104] 2) Mixing: Add the raw materials according to the above ratio, and mix and stir evenly for 70 seconds.

[0105] 3) Compression molding: Pour the mixture into a molding machine with a pressure of 180 tons and a pressure of 18 MPa. The pressing process is 20 seconds, and the mixture is pressed into shape. After the pressing is completed, the block is ejected. ...

Embodiment 3

[0110] The difference technical feature of this embodiment 3 and embodiment 1 is:

[0111] 1) Preparation of materials: Calculated by weight, prepare 100 parts of fried phosphogypsum powder, 28 parts of water, 0.1 part of polymer water-retaining agent, 0.5 part of water-reducing agent, 0.5 part of dispersant, 0.5 part of retarder, reinforcement 0.6 part of the agent; the fineness of the water-retaining agent is 80 mesh, and the water absorption rate is 500 times of its own weight.

[0112] 2) Mixing: Add the raw materials according to the above ratio, and mix and stir evenly for 85 seconds.

[0113] 3) Compression forming: Pour the mixture into a molding machine with a pressure of 210 tons and a pressure of 21 MPa. During the pressing process for 25 seconds, the mixture is pressed and formed, and the block is ejected after the pressing is completed.

[0114] 4) Forming maintenance: put the pressed blocks for 25 minutes before they can be put into storage or leave the factory....

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Abstract

The invention discloses a semi-dry production method for mechanically and continuously preparing an ardealite building block. The method comprises the following steps: firstly, preparing 100 parts by weight of fried ardealite powder, 25-30 parts by weight of water and a proper amount of auxiliary agent; secondly, adding the raw materials in proportion, and uniformly mixing and stirring for 70-100 seconds; pouring the mixture into a forming machine, pressing for 20-30 seconds under the pressure of 180-230 tons and the pressure intensity of 18-23 MPa, performing compression molding on the mixture, and ejecting the building block after the compression is finished; and finally, standing the pressed building block for 15-30 minutes, and warehousing or leaving a factory. The invention further discloses the phosphogypsum building block. According to the production method disclosed by the invention, the water consumption and the compression molding time can be reduced, the curing temperature of the building block is increased by utilizing heat of hydration reaction, drying is not needed, the building block can be hoisted and transferred into a warehouse or leaves a factory within 15-30 minutes, the strength of the phosphogypsum building block is remarkably improved, the production cost is saved, the production efficiency is improved, and the qualified rate of products is ensured.

Description

technical field [0001] The invention belongs to the technical field of phosphogypsum chemical building materials, and in particular relates to a semi-dry production method for preparing phosphogypsum blocks with full mechanization and continuous high-efficiency and a phosphogypsum block. Background technique [0002] Phosphogypsum (the main component is CaSO 4 2H 2 O) the fried phosphogypsum powder produced (the main component is CaSO 4 1 / 2H 2 O, the original "P" of phosphogypsum 2 o 5 , SiO 2 、Al 2 o 3 , Fe 2 o 3 , MgO, F and other impurities" are greatly reduced due to high temperature burning loss, and the burning loss rate is about 14%) is a human-friendly cementitious material similar to cement, because hemihydrate gypsum (CaSO 4 1 / 2H 2 O) dihydrate gypsum (CaSO 4 2H 2 O) The crystals (water of crystallization) will be cross-linked with each other, thereby developing the strength of the phosphogypsum-like block. Therefore, using fried phosphogypsum (powder...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14B28B1/52B28B3/08B28B11/24
CPCC04B28/143B28B1/52B28B3/086B28B11/245C04B2201/50C04B2103/302C04B2103/408C04B2103/22C04B16/06C04B18/24
Inventor 封信超陈正强
Owner 遵义汉丰装饰材料有限责任公司
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