A kind of preparation method of soil conditioner using phosphogypsum as raw material

A soil conditioner and phosphogypsum technology, which is applied in soil conditioning materials, chemical instruments and methods, organic fertilizers, etc., can solve the problems that soil conditioners are difficult to widely use, and achieve the effects of resource utilization, enhanced capacity and low cost

Active Publication Date: 2018-06-26
赵常然
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] In order to realize the comprehensive utilization of phosphogypsum and solve the problem that the existing soil conditioner is difficult to be widely used, the present invention provides a preparation method of a soil conditioner using phosphogypsum as a raw material to achieve environmental protection, no pollution, and low-cost improvement of soil quality

Method used

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  • A kind of preparation method of soil conditioner using phosphogypsum as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Grinding the phosphogypsum waste residue produced by the phosphorus chemical industry to 20 meshes to obtain phosphogypsum powder;

[0035] (2) The weight ratio of phosphogypsum powder (on dry basis) to wet-process activated carbon (on dry basis) is 1:0.1, and the phosphogypsum powder obtained in step (1) is uniformly mixed with wet-process activated carbon to obtain a mixture;

[0036] Wherein, the wet-process activated carbon is made according to the following method:

[0037] a. Crushing the straw to 200 mesh to obtain straw powder;

[0038] b. According to step a, the weight ratio of straw powder to industrial waste sulfuric acid is 1:40, the straw powder obtained in step a is mixed with industrial waste sulfuric acid with a concentration of 90wt%, and reacted at 160°C at a rotation speed of 20rpm for 6 hours, get the reactants;

[0039] c, separating the reactant obtained in step b to obtain a solid product and a filtrate, repeatedly washing the solid product...

Embodiment 2

[0044] (1) Grinding the phosphogypsum waste residue produced by the phosphorus chemical industry to 60 meshes to obtain phosphogypsum powder;

[0045] (2) The weight ratio of phosphogypsum powder (on dry basis) to wet-process activated carbon (on dry basis) is 1:1, and the phosphogypsum powder obtained in step (1) is uniformly mixed with wet-process activated carbon to obtain a mixture;

[0046] Wherein, the wet-process activated carbon is made according to the following method:

[0047] a. Dissolve 400 mesh glucose with 1 times water;

[0048] b. According to step a, the weight ratio of glucose and titanium dioxide waste acid with a concentration of 93wt% is 1:2, mix the glucose obtained in step a with titanium dioxide waste acid, and oscillate at 100°C at an oscillation frequency of 60 times / min React for 10 seconds to get the reactant;

[0049] c, separating the reactant obtained in step b to obtain a solid product and a filtrate, repeatedly washing the solid product with...

Embodiment 3

[0054] (1) Grinding the phosphogypsum waste residue produced by the phosphorus chemical industry to 120 mesh to obtain phosphogypsum powder;

[0055] (2) According to the weight ratio of phosphogypsum powder (on dry basis) to wet-process activated carbon (on dry basis) is 1:2, the phosphogypsum powder obtained in step (1) and wet-process activated carbon are uniformly mixed to obtain a mixture;

[0056] Wherein, the wet-process activated carbon is made according to the following method:

[0057] a. Dissolve 200g of 120-mesh tapioca starch with 4 times of water, and heat to 80°C for gelatinization while stirring;

[0058] B, according to the weight ratio of the tapioca starch after step a gelatinization and the alkylation waste sulfuric acid that concentration is more than 60wt% is 1:12, under the agitation condition of 1 revolution / second, step a gained tapioca starch and alkylation The waste sulfuric acid was mixed, and then placed in an ultrasonic instrument at 80°C for 30 ...

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Abstract

The invention discloses a preparation method of a soil conditioner taking phosphogypsum as a raw material, and belongs to the technical field of phosphogypsum resource utilization. The preparation method comprises the steps of smashing the raw material, namely the phosphogypsum, and mixing with wet-process activated carbon evenly according to a certain ratio, then adding ammonium hydroxide or ammonia-nitrogen wastewater to carry out an acid-base neutralization reaction, obtaining a solid product and filter liquor after performing solid-liquid separation on a reactant, and drying the solid product to obtain the soil conditioner. The obtained soil conditioner is charcoal grey and in the shape of amorphous wet powder particle, has flexibility and elasticity, has no dust, has high specific surface area and high adsorptive property, and meanwhile, contains multiple nutritional ingredients required by the growth of crops, wherein ammonium hydrogen phosphate and ammonium dihydrogen phosphate have the capabilities of adjusting and stabilizing the pH value. The soil conditioner strengthens the capability of conditioning soil, increases the storage property, and really has eurytopicity, specificity, versatility, environmental protection property and economy.

Description

technical field [0001] The invention belongs to the technical field of phosphogypsum resource utilization, and relates to a preparation method of a soil conditioner using phosphogypsum as a raw material. Background technique [0002] Phosphogypsum is mainly the solid waste produced by the wet production of phosphoric acid in phosphoric acid plants, detergent plants and other chemical fertilizers and daily chemical systems. 2 o 5 ) to produce 5-6t (dry basis) of phosphogypsum, and the actual amount is about 7t. Phosphogypsum except CaSO 4 In addition, it also contains undecomposed phosphate rock, unwashed phosphoric acid, calcium fluoride, iron, aluminum compounds, acid insoluble matter, organic matter and other impurities, which affect the utilization of phosphogypsum. Currently, the vast majority of phosphogypsum is discarded as waste. However, the discarding of phosphogypsum waste residues has the following problems: one is to occupy a large amount of land; In additio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/06C09K101/00C09K109/00
CPCC09K17/06C09K2101/00C09K2109/00
Inventor 赵常然
Owner 赵常然
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