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The Chinese Society of Chemical Industry hosted the Guizhou Provincial Research Institute of Chemical Industry and Guizhou Shengyuan New Materials Co.
, Ltd.
last week in Weng'an County, Guizhou Province.
Scientific and technological achievements evaluation meeting
.
Experts believe that these two technological achievements have reached the domestic leading level and are of great significance to the sustainable development and ecological protection of the phosphorus chemical industry
.
It is recommended to speed up the industrial application and promotion on the basis of the 3000 ton/year pilot test device
.
Among them, the integrated beneficiation technology for the efficient and clean comprehensive utilization of low- and medium-grade phosphate rock is a major breakthrough in the beneficiation technology of carbonate-type phosphate rock, which improves the utilization rate of phosphorus resources and realizes the resource utilization of calcium and magnesium in phosphate rock.
It solves the environmental protection problem caused by the phosphorus tailings produced by the existing flotation method
.
Using this technology to treat low- and medium-grade phosphate rock (P2O518%~22%), phosphate concentrate with 37%～38% P2O5 content can be obtained, and the phosphorus recovery rate is over 99%.
There is no waste water and tailings discharge in the whole process.
The resulting product is Downstream processing creates good conditions and is an efficient, clean, green and environmentally friendly process
.
? The efficient and clean comprehensive utilization technology of phosphate tailings realizes the secondary utilization of phosphorus and calcium and magnesium resources in phosphate tailings, and solves the major problems of phosphate tailings accumulation occupying a large amount of land and affecting the ecological environment.
It is an efficient and clean comprehensive utilization of phosphate tailings.
Utilization opens up new ways and has great promotion value
.
? China has large reserves of phosphate rock resources, but about 90% of them are low- and medium-grade phosphate rock that cannot be directly utilized.
Among them, 80% are extremely difficult to select collophane rock, which contains more impurities such as iron, aluminum, magnesium, and silicon
.
At present, most low-grade phosphate ores are enriched by flotation, and the magnesium content of the phosphate concentrate obtained by flotation can be reduced to 0.
8% to 1.
5%, which can meet the requirements of phosphate ores for wet processing in most cases
.
But for the production of water-soluble fertilizer and polyphosphoric acid, ammonium polyphosphate and nitrophosphate fertilizer tower melt granulation process, the magnesium content of this phosphate concentrate is still too high
.
The middle and low-grade phosphate rock that passed the evaluation this time can help solve this problem with the efficient, clean and comprehensive utilization of beneficiation technology
.
In addition to phosphorus, there are many useful minerals in phosphorus tailings, such as calcium, magnesium, manganese, antimony, copper, iron, etc.
.
At present, the utilization rate of tailings in China is about 7%, and most of the remaining tailings are stored in tailings ponds
.
In the face of the challenge of the global scarcity of phosphate rock resources and the increasingly high environmental protection requirements, it is of great significance to use phosphate tailings as a secondary resource for rational development and utilization
.
? Academician of the Chinese Academy of Engineering and President of Guizhou University Song Baoan served as the chairman of the evaluation committee; Professor Zhong Benhe, a senior phosphorus chemical expert from Sichuan University, and Hua Wei, vice chairman and secretary-general of the China Chemical Industry Society, served as the deputy chairman.
Experts from the Group, Wengfu Group, Kingenta Nuotel Chemical Co.
, Ltd.
and other units attended the evaluation meeting
.
, Ltd.
last week in Weng'an County, Guizhou Province.
Scientific and technological achievements evaluation meeting
.
Experts believe that these two technological achievements have reached the domestic leading level and are of great significance to the sustainable development and ecological protection of the phosphorus chemical industry
.
It is recommended to speed up the industrial application and promotion on the basis of the 3000 ton/year pilot test device
.
Among them, the integrated beneficiation technology for the efficient and clean comprehensive utilization of low- and medium-grade phosphate rock is a major breakthrough in the beneficiation technology of carbonate-type phosphate rock, which improves the utilization rate of phosphorus resources and realizes the resource utilization of calcium and magnesium in phosphate rock.
It solves the environmental protection problem caused by the phosphorus tailings produced by the existing flotation method
.
Using this technology to treat low- and medium-grade phosphate rock (P2O518%~22%), phosphate concentrate with 37%～38% P2O5 content can be obtained, and the phosphorus recovery rate is over 99%.
There is no waste water and tailings discharge in the whole process.
The resulting product is Downstream processing creates good conditions and is an efficient, clean, green and environmentally friendly process
.
? The efficient and clean comprehensive utilization technology of phosphate tailings realizes the secondary utilization of phosphorus and calcium and magnesium resources in phosphate tailings, and solves the major problems of phosphate tailings accumulation occupying a large amount of land and affecting the ecological environment.
It is an efficient and clean comprehensive utilization of phosphate tailings.
Utilization opens up new ways and has great promotion value
.
? China has large reserves of phosphate rock resources, but about 90% of them are low- and medium-grade phosphate rock that cannot be directly utilized.
Among them, 80% are extremely difficult to select collophane rock, which contains more impurities such as iron, aluminum, magnesium, and silicon
.
At present, most low-grade phosphate ores are enriched by flotation, and the magnesium content of the phosphate concentrate obtained by flotation can be reduced to 0.
8% to 1.
5%, which can meet the requirements of phosphate ores for wet processing in most cases
.
But for the production of water-soluble fertilizer and polyphosphoric acid, ammonium polyphosphate and nitrophosphate fertilizer tower melt granulation process, the magnesium content of this phosphate concentrate is still too high
.
The middle and low-grade phosphate rock that passed the evaluation this time can help solve this problem with the efficient, clean and comprehensive utilization of beneficiation technology
.
In addition to phosphorus, there are many useful minerals in phosphorus tailings, such as calcium, magnesium, manganese, antimony, copper, iron, etc.
.
At present, the utilization rate of tailings in China is about 7%, and most of the remaining tailings are stored in tailings ponds
.
In the face of the challenge of the global scarcity of phosphate rock resources and the increasingly high environmental protection requirements, it is of great significance to use phosphate tailings as a secondary resource for rational development and utilization
.
? Academician of the Chinese Academy of Engineering and President of Guizhou University Song Baoan served as the chairman of the evaluation committee; Professor Zhong Benhe, a senior phosphorus chemical expert from Sichuan University, and Hua Wei, vice chairman and secretary-general of the China Chemical Industry Society, served as the deputy chairman.
Experts from the Group, Wengfu Group, Kingenta Nuotel Chemical Co.
, Ltd.
and other units attended the evaluation meeting
.
