Method for preparing soil conditioner by using ardealite as raw material through high-temperature calcination

A soil conditioner and high-temperature calcination technology, which is applied in the field of solid waste resource utilization, can solve the problems of long processing process, low consumption of phosphogypsum, poor processing effect, etc., and achieves simple process, easy control and operation. , The effect of repairing the status quo of soil compaction

Pending Publication Date: 2022-02-11
GUIZHOU RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the above-mentioned process of preparing soil conditioner by calcination of phosphogypsum as raw material is relatively complicated, and requires regional resources such as potassium feldspar, resulting in high cost of raw material preparation process, and long and complicated treatment process, resulting in The absorption capacity of phosphogypsum is low, and the treatment effect is not good

Method used

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  • Method for preparing soil conditioner by using ardealite as raw material through high-temperature calcination
  • Method for preparing soil conditioner by using ardealite as raw material through high-temperature calcination
  • Method for preparing soil conditioner by using ardealite as raw material through high-temperature calcination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] After the phosphogypsum collected from the slag dump is crushed through a 50-mesh sieve, it is granulated by adding water, and the particle size is maintained between 2mm-5mm, and then sent into the calciner, protected by a nitrogen atmosphere, and treated at 300°C for 1 hour , to obtain phosphogypsum particles;

[0026] Take phosphogypsum freshly discharged from the wet-process phosphoric acid process as an auxiliary material, add the auxiliary material and phosphogypsum particles at a mass ratio of 0.5:1, and stir at a stirring speed of 100r / min for 30 minutes to obtain the product.

Embodiment 2

[0028] Such as figure 2 As shown, the phosphogypsum collected from the slag dump was crushed through a 50-mesh sieve to obtain phosphogypsum powder; the plant waste (corn straw) was crushed and passed through a 50-mesh sieve to obtain plant powder; the phosphogypsum powder Mix with plant powder according to the mass ratio of 1:0.01, add water to granulate, and then send it into a calciner, protect it in a nitrogen atmosphere, and treat it at a temperature of 300°C for 1 hour to obtain phosphogypsum particles; other operations are prepared according to the operation method of Example 1, Instantly.

Embodiment 3

[0030] Such as figure 2 As shown, the phosphogypsum collected from the slag dump was crushed through a 50-mesh sieve to obtain phosphogypsum powder; the plant waste (trimmed tea tree dead branches) was crushed and passed through a 50-mesh sieve to obtain plant powder; Mix phosphogypsum powder and plant powder according to the mass ratio of 1:0.05, add water to granulate, and then send it into a calciner, protect it in a nitrogen atmosphere, and treat it at a temperature of 500°C for 1 hour to obtain phosphogypsum granules; other operations are carried out according to the operation method of Example 1. Operation processing preparation, that is.

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Abstract

The invention relates to the technical field of solid waste resource utilization, in particular to a method for preparing a soil conditioner by using ardealite as a raw material through high-temperature calcination, wherein particles formed by calcined ardealite granulation are utilized, volatile substances in the particles continuously escape outwards to form pores, the air permeability and the permeability of the soil conditioner are enhanced, by supplementing fresh ardealite and blending, the content of free nutrients is increased, the free nutrients can be adsorbed, and the purposes of supplementing nutrients to crops and increasing the yield of the crops are achieved.

Description

technical field [0001] The invention relates to the technical field of solid waste resource utilization, in particular to a method for preparing a soil conditioner by using phosphogypsum as a raw material for high-temperature calcination. Background technique [0002] Phosphogypsum is the industrial waste discharged from the wet-process phosphoric acid process. Generally, every ton of wet-process phosphoric acid (in P 2 o 5 In total), 4 to 4.5 tons of phosphogypsum will be produced. The stockpiling of a large amount of phosphogypsum not only easily leads to environmental pollution and waste of land resources, but also makes it difficult for phosphogypsum to be utilized as a resource, resulting in a heavy burden on phosphorus chemical enterprises and poor economic benefits. [0003] At present, the comprehensive utilization of phosphogypsum resources has been preliminarily studied, and corresponding results have been achieved, making phosphogypsum widely used in building ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/06C05G3/80C09K101/00
CPCC09K17/06C05D3/00C05G3/80C09K2101/00
Inventor 陈文兴谯祖勤代应会丁蕾陈梅梅司孝刚王文章
Owner GUIZHOU RES INST OF CHEM IND
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