Preparation method for phosphogypsum baking-free brick

A technology of phosphogypsum and non-burning bricks is applied in the field of yellow phosphorus slag as raw material, which can solve the problem of high production cost and achieve the effects of promoting employment, easy maintenance, and easy popularization and application.

Inactive Publication Date: 2014-10-08
云南常青树化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing method of making bricks from phosphogypsum with adhesives relies on the adhesive force of the adhesive to produce strength and durability. Although it is technically feasible and the process route is simple, the production cost is still too high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Phosphogypsum, a by-product produced in the phosphoric acid production process, is taken out of the phosphoric acid system for stacking as a raw material for the production of phosphogypsum unburned bricks;

[0032] ⑵Dry the yellow phosphorus slag and stack it as a raw material for the production of phosphogypsum unburned bricks;

[0033] (3) Stack quicklime as raw material for producing phosphogypsum unburned bricks;

[0034] ⑷Through metering, according to the mass percentage ratio of 43:2, the yellow phosphorus slag and lime are ground, and the fineness after grinding reaches -180 mesh 95%;

[0035] (5) After the phosphogypsum is measured, the phosphogypsum is added according to the mass percentage ratio of 55:43:2, and three kinds of raw material solid phases are made and transported to the digestion bin;

[0036] (6) Digest the uniformly mixed solid-phase material in the digestion chamber, and the reaction time is controlled within 7 hours;

[0037] ⑺The mate...

Embodiment 2

[0040] (1) Phosphogypsum, a by-product produced in the phosphoric acid production process, is taken out of the phosphoric acid system for stacking as a raw material for the production of phosphogypsum unburned bricks;

[0041] ⑵Dry the yellow phosphorus slag and stack it as a raw material for the production of phosphogypsum unburned bricks;

[0042] (3) Stack quicklime as raw material for producing phosphogypsum unburned bricks;

[0043] ⑷Through metering, according to the mass percentage ratio of 42:3, the yellow phosphorus slag and lime are ground, and the fineness after grinding reaches -180 mesh 95%;

[0044] (5) After the phosphogypsum is measured, the phosphogypsum is added according to the mass percentage ratio of 55:42:3, and three kinds of raw material solid phases are made and transported to the digestion bin;

[0045] (6) Digest the homogeneously mixed solid-phase material in the digestion chamber, and the reaction time is controlled within 8 hours;

[0046] ⑺The ...

Embodiment 3

[0049] (1) Phosphogypsum, a by-product produced in the phosphoric acid production process, is taken out of the phosphoric acid system for stacking as a raw material for the production of phosphogypsum unburned bricks;

[0050] ⑵Dry the yellow phosphorus slag and stack it as a raw material for the production of phosphogypsum unburned bricks;

[0051] (3) Stack quicklime as raw material for producing phosphogypsum unburned bricks;

[0052] ⑷Through measurement, according to the mass percentage ratio of 41:4, the yellow phosphorus slag and lime are ground, and the fineness after grinding reaches -180 mesh 95%;

[0053] (5) After the phosphogypsum is measured, the phosphogypsum is added according to the mass percentage ratio of 55:41:4, and three kinds of raw material solid phases are made and transported to the digestion bin;

[0054] (6) Digest the homogeneously mixed solid-phase material in the digestion chamber, and the reaction time is controlled within 9 hours;

[0055] ⑺T...

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Abstract

The invention discloses a preparation method for a phosphogypsum baking-free brick. The preparation method comprises the following steps of (1), guiding byproduct phosphogypsum produced in a phosphoric acid production process out of a phosphoric acid system for stacking to be used as a material for producing the phosphogypsum baking-free brick, metering, and uniformly mixing the phosphogypsum, yellow phosphorus residue and lime in a weight proportion of 55:(41-43):(2-4) to prepare three material solid phases which are conveyed to a digestion bin. The brick disclosed by the invention can replace the clay brick for use, and a great deal of phosphogypsum can be digested, so that not only is waste residue piling and maintaining pressure of light phosphatic fertilizer enterprises relieved, but also environment is protected and land is saved. According to the invention, production materials are from various industrial waste residues, and therefore, the preparation method has the remarkable advantages of low production cost, simple process, strong operability and environment friendliness.

Description

technical field [0001] The invention relates to a production method of phosphogypsum non-fired bricks, in particular to a production method using phosphogypsum, a by-product produced in the production process of phosphoric acid, and yellow phosphorus slag produced in the production process of a yellow phosphorus plant as raw materials, and the raw material cost is low. Background technique [0002] At present, in the production of many unburned bricks, it is often necessary to add cement as an active activator to prepare composite cementitious materials, resulting in high production costs. In particular, phosphogypsum is used as the main raw material for production. Since phosphogypsum is very fine particles ranging from a few microns to about two hundred microns, most of which are in the particle size of tens of microns, when making bricks, the compression ratio of the material is large, and there is no bite force between the particles under pressure. The mechanical streng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
Inventor 陈爱中刘兵
Owner 云南常青树化工有限公司
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