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Soil conditioner produced from ardealite as well as producing method and using method of soil conditioner

A technology of soil improver and phosphogypsum, applied in chemical instruments and methods, land preparation methods, soil conditioning materials, etc., can solve problems such as limited market capacity of phosphogypsum comprehensive utilization products, and inability to produce phosphogypsum

Inactive Publication Date: 2013-03-20
GANSU WENGFU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is understood that at present, many large phosphate fertilizer enterprises located in mountainous areas, due to the huge production of phosphogypsum and the limited market capacity of phosphogypsum comprehensive utilization products, cannot fully utilize phosphogypsum in the short term, and can only use open-air stacking.

Method used

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  • Soil conditioner produced from ardealite as well as producing method and using method of soil conditioner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] According to the weight percentage of ratio 1, prepare 100 tons of raw materials for production. After the materials are mixed evenly, they are sent to the granulator, and steam is introduced at the same time. The humidity is controlled at 15%-20%, and the temperature is 20°C-25°C. Hot air drying is carried out, the process temperature is controlled at 120°C-124°C, and the tail gas temperature is less than 60°C. The granular material is dried in the rotary dryer and then transferred to the flip cooler. After cooling to room temperature, it is screened in two stages. The first stage has a sieve hole of 4.75mm, and the large particles are screened out and crushed. The second-stage screening, the second-stage sieve hole is 2.2mm, and the materials with a particle size of less than 2.2mm are sent to the granulator together with the first-stage crushed materials, and the qualified materials after the second-stage screening are transferred to the coating film The system is co...

Embodiment 2

[0023] Prepare 100 tons of raw materials according to the weight percentage of proportioning 2 for production. The production process is the same as in Example 1, the only difference being the steam that passes into the granulator, the humidity is controlled at 16%-23%, the temperature is 25°C-30°C, and the temperature is 25°C-30°C. The air drying temperature is 122°C-128°C, and the amount of anti-caking agent used is 0.7% of the product weight.

Embodiment 3

[0025] Prepare 100 tons of raw materials according to the weight percentage of proportioning 2 for production. The production process is the same as in Example 1. The only difference is the steam that passes into the granulator, the humidity is controlled at 16%-25%, the temperature is 22°C-26°C, and the heat The air drying temperature is 125°C-130°C, and the amount of anti-caking agent used is 0.7% of the product weight.

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Abstract

The invention discloses a soil conditioner produced from ardealite as well as a producing method and a using method of the soil conditioner. The soil conditioner contains ardealite, humic acid, ferrous sulfate, urea and sulfuric acid which are mixed and shaped to granules. The soil conditioner is produced from ardealite which is the main raw material and added with a certain amount of nutrient elements and has the characteristics of conditioning the soil structure, adjusting pH of soil, activating the activity of nutrient elements of the soil, supplementing trace elements such as calcium, sulphur, ferrum and zinc in the soil, and the like; and the soil conditioner is suitable to conditioning of saline-alkali soil. The soil conditioner has the advantages of lowering the pH of surface soil, the content of water-soluble Na<+> and exchangeable Na<+> in the soil, the alkalisation degree and the volume weight of the soil, and enhancing the soil infiltration, the utilization rate of fertilizers and the soil productivity. A method for conditioning saline-alkali land, which is effective, economical, practical and consistent with the actual situations, is successfully proposed.

Description

technical field [0001] The invention relates to a new way of utilizing phosphogypsum, in particular to a method for preparing a saline-alkali soil improver by using phosphogypsum as a raw material. Background technique [0002] Phosphogypsum is a by-product of the production process of phosphate fertilizer. The treatment and utilization of phosphogypsum is a worldwide problem. As the world's largest producer of phosphate fertilizer, China is also the largest by-product of phosphogypsum. It is understood that at present, many large phosphate fertilizer enterprises located in mountainous areas, due to the huge production of phosphogypsum and the limited market capacity of phosphogypsum comprehensive utilization products, cannot fully utilize phosphogypsum in the short term, so they can only use open-air stacking. Most domestic small enterprises adopt the method of dry slag discharge and flat stacking. Large-scale phosphate fertilizer enterprises use wet slag discharge, build...

Claims

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Application Information

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IPC IPC(8): C09K17/40A01B77/00A01B79/00C09K101/00C09K109/00
Inventor 高源张胜葛洪均王世文李永龙李蓉清张天军
Owner GANSU WENGFU CHEM
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