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Soil conditioner used for treating heavy metal pollution

A soil conditioner, heavy metal technology, applied in the direction of soil conditioning materials, applications, organic fertilizers, etc., to achieve the effect of reasonable durability

Inactive Publication Date: 2015-12-30
湖南博川农业发展有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the current situation that my country's soil is "acid in the south, alkali in the north, and desert in the northwest" and overcome the problem of soil heavy metal pollution, the purpose of the present invention is to provide a soil conditioner for controlling soil heavy metal pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment one: press CaO 40%, SiO 2 30%, MgO 10%, and other elements 20%. Choose one or more of calcareous raw materials; choose one or more of magnesia raw materials; choose one or more of siliceous raw materials, choose flux minerals One or several kinds of ingredients, the standard deviation is controlled at 1%, and then the raw meal is prepared, and its fineness exceeds 100 mesh and enters the raw meal homogenization warehouse. When the degree of homogenization reaches the standard and the deviation is not greater than 0.2%, the The firing temperature is controlled at 1150-1250°C, and the firing time is controlled at 8 hours. After leaving the kiln and cooling sufficiently, it is put into the workshop for grinding. The fineness is over 100 mesh. When the temperature is less than 40°C and the standard deviation is less than 0.2%, it can be packed in 50kg, 40kg, or 25kg for storage.

Embodiment 2

[0022] According to CaO 60%, SiO 2 20%, MgO 5%, and other elements 15%. Choose one or more of the calcareous raw materials, choose one or more of the magnesia raw materials; choose one or more of the siliceous raw materials, choose one or more of the flux minerals One or several kinds of ingredients, the standard deviation is controlled at 1%, and then the raw meal is prepared, and its fineness exceeds 100 mesh and enters the raw meal homogenization warehouse. When the degree of homogenization reaches the standard and the deviation is not greater than 0.2%, the Fired in a rotary kiln, the firing temperature is controlled at 1150 to 1250 ° C, and the firing time is controlled at 0.5 hours. After leaving the kiln and cooling sufficiently, it is put into the workshop for grinding. The fineness is over 100 mesh. After cooling, For homogenization, when the temperature is less than 40°C and the standard deviation is less than 0.2%, it can be packed in 50kg, 40kg, or 25kg for storage...

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Abstract

The invention provides a soil conditioner used for treating heavy metal pollution. The soil conditioner comprises the following chemical components by weight: 40 to 60% of CaO, 20 to 30% of SiO2, 3 to 10% of MgO and 10 to 30% of other non-functional mineral elements consisting of Al2O3 and Fe2O3. Polluted soil contains the following heavy metals: no more than 5 ppm of mercury, no more than 10 ppm of cadmium, no more than 10 ppm of arsenic, no more than 50 ppm of lead and no more than 50 ppm of chromium. The soil conditioner is prepared from a calcareous raw material, a magnesian raw material, a siliceous material and flux minerals through batching, raw grinding, sintering, grinding after cooking, detection and packaging after detection is passed. According to testing results, the soil conditioner can completely passivate and chelate soil containing less than 20 ppm of cadmium, enables yield to be increased by more than 30%, particularly guarantees agricultural products produced by obstructed soil reach the standard within 20 to 30 years and poses no adverse influence to the microbial populations, enzyme and granular structure of soil.

Description

technical field [0001] The invention relates to a soil conditioner for controlling heavy metal pollution, belonging to the technical field of agricultural chemical fertilizers. Background technique [0002] Due to the harmfulness, concealment, and complexity of heavy metal pollution, it has aroused widespread concern from the whole society. After World War II, Western industrialized countries took nearly 40 years to control the pollution of agricultural land caused by industrial production, and spent as much as 300,000 RMB per month. Mu, heavily polluted areas have brought serious disasters to local residents; [0003] Since my country's reform and opening up, industrial enterprises have risen rapidly. In 30 years, it has become the second largest economy in the world from a typical agricultural country. Its gross national product has exceeded 10 trillion US dollars. The large amount can support economic development. Most of them are primary and secondary industries. Typical...

Claims

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Application Information

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IPC IPC(8): C09K17/08C09K101/00
Inventor 雷志刚雷星宇
Owner 湖南博川农业发展有限责任公司
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