Alum were of the world, "said the alum hills has more than 640 years of alum mining, smelting, accumulated a rich culture, cultivate a large number of geological, geographical knowledge and good at professional mine of the mining technology, thereby giving impetus to the development of the county of mine industry, in different periods of site recorded the scene of mining workers production and life here, also witnessed the historical process of China's mining development evolution until strong prosperity. The process of "mining - calcination - weathering - dissolution - crystallization" created by him remains intact and is still in use today. The derived mining, blasting, tunneling, smelting and other technologies have made indelible contributions to China's industrial development.
Surrounded by mountains, surrounded by Emerald green hills and surrounded by forests and luxuriant bamboo, walking in the ecological ancient town, the vast majority of areas within The territory of Yanshan have been surveyed by the provincial geological department with selenium content of over 1.32mg per kilogram of soil, making it a veritable "selenium-rich town". After pollution control, tree planting and improvement of rural living environment, fanshan Town, which enjoys the title of "provincial forest town, provincial ecological town and provincial advanced town of civilization", is a natural oxygen bar.
Vanadium Hydride, the nature of the material is very lively, intense chemical reaction occurs under the influence of water, and produces a large number of flammable gas, release a large amount of heat, occur the thermal ignition. VH2 Powder widely used as metallurgical additive, reducing agent; Hydrogen generator.
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