According to a recent report by CCTV News, exploration teams have uncovered a massive deposit of phosphorite in Kaiyang County, Guizhou Province. This discovery boasts a verified reserve of 801 million tons of phosphorite, which is roughly double the total amount mined from China's largest Kaiyang Phosphorous Mine over the past 22 years.
The exploration efforts for this site began more than a decade ago, but it wasn't until recently that they were fully assessed. The phosphorite spans nearly 50 square kilometers, with an average thickness of 5.49 meters and an average ore grade (P2O5) of 33.47%. Among these reserves, high-grade phosphate ore accounts for 8 billion tons, with a maximum control depth reaching 1,629.4 meters and a minimum control elevation for the phosphate layer at -404.57 meters.
Despite the country's current abundance of phosphate reserves, experts warn that if the current mining practices continue—where higher-grade ores are prioritized while lower-grade ones are neglected—China’s phosphate deposits could be entirely depleted within the next two decades.
Approximately 80% of China's phosphate resources are concentrated in five provinces: Yunnan, Guizhou, Sichuan, Hubei, and Hunan. Of these, Yunnan Province holds the richest reserves, with a long-term stockpile of 20 billion tons. Yunnan's Kunyang Mine ranks among the world's top four phosphate mines alongside Florida in the United States, Kola in Russia, and Morocco in Africa.
While this discovery is promising, it also highlights the urgent need for sustainable mining practices to ensure that future generations can benefit from these critical resources. As global demand for fertilizers continues to grow, maintaining a balanced approach to extraction becomes increasingly vital.
Attached below are images showing the scale and significance of this discovery:
[Image description: Aerial view of the Kaiyang County phosphorite site]
[Image description: Geological survey team conducting on-site analysis]
[Image description: Cross-section illustration of the phosphorite deposit layers]
[Image description: Comparison chart of global phosphate reserves]
This find underscores the importance of continued geological research and strategic resource management in ensuring China's energy security and agricultural sustainability.
Porcelain Fuse Cutout
Dropout Fuse Cutout and load drop fuse cutout are outdoor used high-voltage protective devices. They are connected with the main lines of the distribution transformer or the distribution wires to protect the transformer or wires from short circuit and overload, and on/off loading current. Dropout fuse cutout consists of insulating bracket and fuse tube. The static contacts are fixed on the two ends of bracket, while the moving contacts are fixed on the two ends of fuse tube. Fuse tube is composed of inner extinction tube and the outer epoxy glass tube. The load drop fuse cutout is added with elastic supporting contacts and arcing shield for switching on-off loading current. In normal operation, the fuse tube will form an enclosure via its tightened fuse link. The fuse will be melt off quickly and form an arc if there is any fault, the extinction tube is heated by the arc, exploding much gas to give high pressure into the tube and blow along with the tube, so the arc is quickly elongated and extinguished. When the fuse is cut off, moving contacts at the bottom turn down without tension; the locking frame will release the fuse, so the fuse drops to form obvious break. When it needs to put load on, start the contact with insulating cod, then the static and moving contacts are still keeping in touch, keep pulling the contacts till the supporting contacts apart. Then there is the arc among the supporting contacts, which is prolonged in the narrow space of arcing shield.At the same time, the arc extinguishing cover generates gas, and the arc is extinguished when the current exceeds zero.
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