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With the advent of low-carbon era, it is imminent to speed up the technological progress of the phosphate fertilizer industry. Last week, experts from the Chinese Phosphatic Fertilizer Industry Association, the China Chemical Mining Association, and the China National Chemical Industry News Agency's "Agricultural Resources" sponsored the promotion of bio-enzyme activators and bio-enzyme-activated phosphate fertilizers. The experts agreed that China should make full use of low and medium grades. Phosphorite, the development of energy-saving, high-efficiency, low-carbon new phosphate fertilizer, acid-free phosphate fertilizer will become one of the important directions for the development of phosphate fertilizer.
According to Professor Liao Zongwen of South China Agricultural University, about two-thirds of China’s cultivated land is seriously deficient in phosphorus, and over 80% of China’s phosphate resources are used for phosphate fertilizer production. How to effectively use the total amount of low- and medium-grade phosphate rock resources is related to The overall situation of China's phosphorus resources strategy and sustainable development of agriculture. According to the "Eleventh Five-Year Plan" of China's phosphate fertilizer industry, China's phosphate fertilizer output will reach 12 million tons (P2O5) this year. Although the total amount of domestic phosphate rock resources ranks second in the world, the average content of P2O5 is mainly less than 17%, and the high-grade P2O5 content of more than 30% accounts for only about 8% of the total. According to statistics, China's existing phosphate rich mineral resources can only be used for about 10 years.
Liao Zongwen proposed that traditional phosphate fertilizer production can be divided into two types of technical systems. One is the production of water-soluble phosphate fertilizers by acid decomposition technology, including superphosphate, heavy superphosphate, nitrate phosphate, and ammonium phosphate, and its output accounts for 90 percent of total phosphate fertilizer output. % or more; the other is the thermal decomposition technology to produce soluble phosphorus fertilizer, such as calcium magnesium phosphate fertilizer, steel slag phosphate fertilizer, defluorinated phosphate fertilizer and so on. The former dissolves quickly after being applied to the soil, and as the rainwater enters the water body, it becomes one of the main reasons for the eutrophication of the water body. Moreover, the production process needs to consume a large amount of sulfuric acid. As domestic sulfur mainly relies on imports, the soaring international sulfur price in recent years has caused great impact on China's phosphate fertilizer production enterprises and agricultural production. Calcium, magnesium, and phosphate fertilizers have poor water solubility and are slow in fertilizer efficiency. They easily combine with aluminum, iron, and manganese ions in the soil to form insoluble precipitates, which leads to a further reduction in the use of phosphate fertilizers. At present, these two production technologies not only consume high acid and consume high energy, but also have high requirements for phosphate rock grades and impurities, and produce gas, solid, and liquid pollution during production. Under the situation where energy supply is tight and environmental issues are increasingly concerned, the development of new products that effectively increase the utilization rate of phosphate fertilizers, reduce the risk of water-soluble phosphorus loss, and prevent pollution has become an important strategic goal of the technological revolution of the phosphate fertilizer industry.
According to Prof. Xu Xiucheng, the National Research Institute for Calcium, Magnesium and Phosphorus Compound Fertilizer Technology, to achieve the goal of reducing carbon dioxide emissions by 24 to 45% per unit of GDP in China in 2020 compared to 2005, all industries must complete corresponding carbon reduction tasks and build new fertilizers. The system, improving fertilizer utilization, and reducing energy consumption are the key ways to complete the carbon reduction task in the fertilizer industry. The efficient use of low-energy low-grade phosphate rock, especially the direct use of phosphate rock in agriculture, will be a new direction for the development of the phosphate fertilizer industry. At present, South China Agricultural University, Beijing Zhongnong Ruiliyuan High-tech Development Company and Tsinghua University have developed a series of new energy-saving, low-emission CO2 fertilizers, which have high promotion value.
Liao Zongwen said that the use of low-grade phosphate rock developed by the New Fertilizer Resource Research Center of South China Agricultural University is to study the results of acid-free phosphate release fertilizers. The low-grade phosphate rock powder and organic-inorganic activator can be used directly after mixing, completely avoiding Traditional sulfuric acid processing and high temperature processing and other production processes have eliminated the generation of pollutants. The activators added to the rock phosphate include zeolites, bentonites, vermiculite and other inorganic materials with special structures and strong ion exchange capacity, and lignin, MSG waste liquids containing a large number of active groups such as hydroxyl groups, carboxyl groups, and amine groups. Organic matter. Due to the use of an ion exchange system, the release of phosphorus from insoluble phosphates is promoted, and the fixation of water-soluble phosphorus and the loss of phosphorus are greatly reduced. Phosphorus in phosphate rock powder can be effectively released for crop utilization, but also can effectively avoid precipitation reactions with calcium, aluminum, iron, and manganese ions in the soil, reducing the eutrophication of water caused by leaching loss, and avoiding ordinary Excessive free acid in the phosphate fertilizer is used to bind farmland and improve its utilization. This new product has now completed laboratory and field trials. Compared with traditional phosphate fertilizers, it can increase the utilization rate of phosphate fertilizer by about 20%, and can save costs from 80 to 280 yuan per ton. It is currently being promoted in Yunnan, Guizhou and Guangxi. And sold to South Africa, India, Australia, Indonesia and other countries and regions.
According to Professor Liao Zongwen of South China Agricultural University, about two-thirds of China’s cultivated land is seriously deficient in phosphorus, and over 80% of China’s phosphate resources are used for phosphate fertilizer production. How to effectively use the total amount of low- and medium-grade phosphate rock resources is related to The overall situation of China's phosphorus resources strategy and sustainable development of agriculture. According to the "Eleventh Five-Year Plan" of China's phosphate fertilizer industry, China's phosphate fertilizer output will reach 12 million tons (P2O5) this year. Although the total amount of domestic phosphate rock resources ranks second in the world, the average content of P2O5 is mainly less than 17%, and the high-grade P2O5 content of more than 30% accounts for only about 8% of the total. According to statistics, China's existing phosphate rich mineral resources can only be used for about 10 years.
Liao Zongwen proposed that traditional phosphate fertilizer production can be divided into two types of technical systems. One is the production of water-soluble phosphate fertilizers by acid decomposition technology, including superphosphate, heavy superphosphate, nitrate phosphate, and ammonium phosphate, and its output accounts for 90 percent of total phosphate fertilizer output. % or more; the other is the thermal decomposition technology to produce soluble phosphorus fertilizer, such as calcium magnesium phosphate fertilizer, steel slag phosphate fertilizer, defluorinated phosphate fertilizer and so on. The former dissolves quickly after being applied to the soil, and as the rainwater enters the water body, it becomes one of the main reasons for the eutrophication of the water body. Moreover, the production process needs to consume a large amount of sulfuric acid. As domestic sulfur mainly relies on imports, the soaring international sulfur price in recent years has caused great impact on China's phosphate fertilizer production enterprises and agricultural production. Calcium, magnesium, and phosphate fertilizers have poor water solubility and are slow in fertilizer efficiency. They easily combine with aluminum, iron, and manganese ions in the soil to form insoluble precipitates, which leads to a further reduction in the use of phosphate fertilizers. At present, these two production technologies not only consume high acid and consume high energy, but also have high requirements for phosphate rock grades and impurities, and produce gas, solid, and liquid pollution during production. Under the situation where energy supply is tight and environmental issues are increasingly concerned, the development of new products that effectively increase the utilization rate of phosphate fertilizers, reduce the risk of water-soluble phosphorus loss, and prevent pollution has become an important strategic goal of the technological revolution of the phosphate fertilizer industry.
According to Prof. Xu Xiucheng, the National Research Institute for Calcium, Magnesium and Phosphorus Compound Fertilizer Technology, to achieve the goal of reducing carbon dioxide emissions by 24 to 45% per unit of GDP in China in 2020 compared to 2005, all industries must complete corresponding carbon reduction tasks and build new fertilizers. The system, improving fertilizer utilization, and reducing energy consumption are the key ways to complete the carbon reduction task in the fertilizer industry. The efficient use of low-energy low-grade phosphate rock, especially the direct use of phosphate rock in agriculture, will be a new direction for the development of the phosphate fertilizer industry. At present, South China Agricultural University, Beijing Zhongnong Ruiliyuan High-tech Development Company and Tsinghua University have developed a series of new energy-saving, low-emission CO2 fertilizers, which have high promotion value.
Liao Zongwen said that the use of low-grade phosphate rock developed by the New Fertilizer Resource Research Center of South China Agricultural University is to study the results of acid-free phosphate release fertilizers. The low-grade phosphate rock powder and organic-inorganic activator can be used directly after mixing, completely avoiding Traditional sulfuric acid processing and high temperature processing and other production processes have eliminated the generation of pollutants. The activators added to the rock phosphate include zeolites, bentonites, vermiculite and other inorganic materials with special structures and strong ion exchange capacity, and lignin, MSG waste liquids containing a large number of active groups such as hydroxyl groups, carboxyl groups, and amine groups. Organic matter. Due to the use of an ion exchange system, the release of phosphorus from insoluble phosphates is promoted, and the fixation of water-soluble phosphorus and the loss of phosphorus are greatly reduced. Phosphorus in phosphate rock powder can be effectively released for crop utilization, but also can effectively avoid precipitation reactions with calcium, aluminum, iron, and manganese ions in the soil, reducing the eutrophication of water caused by leaching loss, and avoiding ordinary Excessive free acid in the phosphate fertilizer is used to bind farmland and improve its utilization. This new product has now completed laboratory and field trials. Compared with traditional phosphate fertilizers, it can increase the utilization rate of phosphate fertilizer by about 20%, and can save costs from 80 to 280 yuan per ton. It is currently being promoted in Yunnan, Guizhou and Guangxi. And sold to South Africa, India, Australia, Indonesia and other countries and regions.
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