Antimony trioxide prices have continued their relentless rise as supply from the world’s production hub, China, remains tight.The government has also shut down over an estimated 100 antimony smelters in the country’s major antimony-producing region in an effort to control illegal mines and pollution, as well as protect domestic resources from near exhaustion. According to distributors based in China, latest prices for antimony trioxide graded 99.5 SbO3 (20 tonne lots, FOB...