Composition for purification treatment of waste phosphogypsum, treating method and construction material obtained thereby

A technology for building materials and compositions, applied in the field of building materials, can solve the problems of occupying land, scattered with the wind, pollution of the surrounding environment, etc., and achieves the effect of solving the problem of purification treatment, avoiding secondary pollution and simple process

CN101503283AInactive Publication Date: 2009-08-12丁根明 +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2009-08-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a composition of a construction material changed from waste phosphogypsum. The composition comprises 100 portions of magnesia-alumina powered ore, and 30 to 70 portions of an ingredient A, wherein the magnesia-alumina powdered ore contains 80 to 90 percent of magnesium oxide, 1 to 5 percent of ferric oxide, 1.5 to 10 percent of calcium oxide, and 1 to 5 percent of phosphoric oxide; and the ingredient A is aqueous solution of magnesium chloride, phosphoric acid and aluminum dihydrogen phosphate, wherein the magnesium chloride accounts for 40 to 60 percent, the phosphoric acid accounts for 0.3 to 0.7 percent, and the aluminum dihydrogen phosphate accounts for 0.2 to 0.4 percent. The invention also discloses a method for purifying the waste phosphogysum. The method is to mix 100 portions of the magnesia-alumina powered ore, 30 to 70 percent of the ingredient A with 100 to 1,200 portions of the crushed waste phosphogypsum, and stir the mixture for 3 to 6 minutes under normal temperature to be naturally solidified. The invention also discloses a construction material, comprising 100 portions of the magnesia-alumina powered ore, 30 to 70 portions of the ingredient A, and 100 to 1,200 portions of the crushed waste phosphogysum.
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Description

technical field

[0001] The invention relates to the field of environmental protection, in particular to a composition for purifying and treating waste phosphogypsum and converting it into building materials, its treatment method and the building materials obtained by the method. Background technique

[0002] Waste phosphate rock gypsum is the waste after phosphorus and phosphoric acid are extracted from phosphate rock, in powder form. At present, there is no good purification method for waste phosphogypsum. The only way is to stack. This not only occupies a large amount of land, but also causes great pollution to the surrounding environment because the waste phosphogypsum is in powder form and will be scattered with the wind. Contents of the invention

[0003] The invention provides a composition for converting waste phosphogypsum into building materials, comprising 100 parts of magnesium-aluminous mineral powder and 30-70 parts of component A, wherein the magnesium-alum...

Examples

Embodiment 1～10

[0016] Mix according to the raw material formulations in Examples 1-10 in Table 1, stir for 3 minutes and then solidify naturally.

[0017] Table 1

[0018]

[0019]

Embodiment 11～20

[0021] Mix according to the raw material formulations in Examples 11-20 in Table 2, stir for 6 minutes, put into a mold with a fixed shape, and naturally solidify after extrusion molding and demoulding.

[0022] Table 2

[0023]

Embodiment 21～30

[0025] Mix according to the raw material formulations in Examples 21-30 in Table 3, stir for 5 minutes, put into a mold with a fixed shape, and naturally solidify after extrusion molding and demoulding.

[0026] table 3

[0027]

[0028]