A Modifier-Roasting Combined Modification Method of Waste Residue Fluorogypsum

A modifier, fluorine gypsum technology, applied in the field of gypsum, can solve problems such as antibiotic abuse and environmental pollution, and achieve the effect of protecting the environment, strong mechanical properties, and optimizing the modification process

Active Publication Date: 2016-03-02
ANHUI JINYANG FLUORINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, landfilling and incineration will seriously pollute the environment, and making animal feed will cause the abuse of antibiotics, and protein feed produced from raw materials containing antibiotic ingredients is explicitly banned by the relevant state departments

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Modifier-roasting method of the present invention combined modified waste residue fluorogypsum, comprising:

[0023] Heat-treat waste fluorine gypsum after hydrofluoric acid production at a temperature of 140°C for 1.5 hours; add 0.55 parts of steel slag, 0.9 parts of calcium carbide slag, and 0.42 parts of half water in parts by weight to 100 parts of heat-treated fluorogypsum Gypsum, 1.0 parts of sodium tripolyphosphate, 0.8 parts of potassium mirabilite, 1.7 parts of calcined alum, 1.6 parts of calcined dolomite, 0.9 parts of polycarboxylate modifier, 0.55 parts of waste mycelia modifier, stirred evenly and then stood still for 15 hours. Roasting, the roasting temperature is 230°C, the roasting time is 55min, and the aging is 7h;

[0024] Wherein, the polycarboxylic acid modifier is prepared according to the following steps: by weight, 24 parts of acrylic acid, 31 parts of methyl acrylate, 20.5 parts of sodium methacrylate and 7.5 parts of propylene polyoxyethylene e...

Embodiment 2

[0027] Modifier-roasting method of the present invention combined modified waste residue fluorogypsum, comprising:

[0028] Heat-treat waste fluorine gypsum after hydrofluoric acid production at a temperature of 130°C for 2 hours; add 0.2 parts of steel slag, 1.2 parts of calcium carbide slag, and 0.5 parts of semi-water to 100 parts of heat-treated fluorogypsum in parts by weight Gypsum, 0.5 parts of sodium tripolyphosphate, 0.2 parts of potassium mirabilite, 3 parts of calcined alum, 0.5 parts of calcined dolomite, 1.2 parts of polycarboxylate modifier, 0.8 parts of waste mycelium modifier, stirred evenly and then stood for 10 hours Roasting, the roasting temperature is 200°C, the roasting time is 80min, and aged for 5h;

[0029] Wherein, the polycarboxylic acid modifier is prepared according to the following steps: by weight, 20 parts of acrylic acid, 25 parts of methyl acrylate, 18 parts of sodium methacrylate and 5 parts of propylene polyoxyethylene ether are added to In...

Embodiment 3

[0032] Modifier-roasting method of the present invention combined modified waste residue fluorogypsum, comprising:

[0033] Heat-treat waste fluorine gypsum after hydrofluoric acid production at a temperature of 150°C for 1 hour; add 0.8 parts of steel slag, 0.5 parts of carbide slag, and 0.2 parts of half water in parts by weight to 100 parts of heat-treated fluorogypsum Gypsum, 1.5 parts of sodium tripolyphosphate, 1.2 parts of potassium mirabilite, 1 part of calcined alum, 2 parts of calcined dolomite, 0.2 parts of polycarboxylic acid modifier, 0.3 parts of waste mycelia modifier, stir well and let it stand for 20 hours before Roasting, the roasting temperature is 245°C, the roasting time is 30min, and aged for 10h;

[0034] Wherein, the polycarboxylic acid modifier is prepared according to the following steps: by weight, 25 parts of acrylic acid, 35 parts of methyl acrylate, 22 parts of sodium methacrylate and 8 parts of propylene polyoxyethylene ether are added to In water...

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Abstract

The invention discloses a method for modifying waste residue fluorgypsum by combining a modifier with roasting. The method comprises the following steps: thermally treating fluorgypsum for 1-2 hours at 130-150 DEG C; adding slag, carbide slag, semi-hydrated gypsum, sodium tripolyphosphate, glaserite, roasted alum, roasted dolomite, a polycarboxylic acid modifier and a mycelium residue modifier into the fluorgypsum subjected to thermal treatment for roasting for 30-80 minutes at 200-245 DEG C, wherein the preparation steps for the polycarboxylic acid modifier are as follows: adding acrylic acid, methyl acrylate, sodium methallyl sulfonate and propenyl polyoxyethylene ether into water, adding potassium persulfate aqueous liquor after heating, stirring and preserving heat, regulating a pH value of the liquor until the liquor is neutral after heating, stirring and preserving the heat; and the preparation steps for the mycelium residue modifier are as follows: drying and smashing the penicillin mycelium residue to prepare suspension liquid, heating, regulating the pH value, stirring and preserving the heat, and filtering. According to the method, the environment is protected, the setting time for the modified fluorgypsum is short and the mechanical strength is high.

Description

technical field [0001] The invention relates to the technical field of gypsum, in particular to a modifier-roasting combined method for modifying waste residue fluorogypsum. Background technique [0002] Fluorogypsum is the main by-product in the production process of hydrofluoric acid and sodium fluoroaluminate, mainly produced in inorganic fluoride and organic fluoride production plants and other hydrofluoric acid production plants. About 3.6t of anhydrous fluorogypsum is produced for every 1t of hydrofluoric acid produced. The main component of fluoride gypsum is calcium sulfate, and contains some calcium fluoride and other fluorides, and sometimes H 2 SO 4 The high content makes the discharged fluorine gypsum acidic, which is a highly corrosive toxic and hazardous waste. Untreated fluorine gypsum cannot be disposed of directly, and it is difficult to be used. And because the solubility of fluorine gypsum is low and the dissolution rate is slow, the setting time is ver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B11/26
Inventor 陈喜
Owner ANHUI JINYANG FLUORINE CHEM
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