Spring blossoms, and the best decoration season in the year, spring decoration, summer ventilation, autumn stay is a choice of many citizens. As an indispensable main material in decoration materials, ceramic tiles are both practical and decorative, and are widely loved by consumers. However, like natural stone, the radiation of tiles has always been a concern. To this end, the reporter interviewed experts from the Nantong National Inspection and Testing Center.
According to experts, because radioactive materials are colorless and odorless, if there is no special instrument measurement, people in daily life can't directly discern which tiles are out of the standard, so try not to decorate the interior with tiles. If you want to choose, choose matt bricks as the best; if you use polished tiles, usually try to open small lights in your home, try to avoid direct light or affect the eyes through reflection. In general, the darker the tiles, the more radioactive materials they contain, and the greater the radiation. Among all the glazed tiles, the red is the most serious. For example, the radioactivity of the tiles such as General Red and Rhododendron is higher than other colors. "But it's not that the lighter and whiter the tiles are the least radiated." The staff said that some ultra-white polished tiles add more radioactive chemicals to bleach the raw materials, which gives them more radiation. In order to enhance the brightening effect of the tile surface during production, some merchants add a brightener called zirconia, which is the main source of radiation.
In general, quality, large brand of tiles, radiation can be assured, consumers do not have to panic. When purchasing ceramic tiles, it is best to leave the accidental packaging to indicate whether the product has met the Class A standard. If the package is not clearly indicated, the dealer may be required to issue relevant inspection reports, and try to use the green products recommended by the China Consumers Association and the national health department. Qualified products are inspected. [Follow the WeChat public number "Jiuzheng Ceramics Network" ; pay attention to surprises, scan the code to read the "the difference between women's entry into the room, deep feelings"! Jiuzheng Ceramics Network Exchange Group: 80123558 】
The production process of copper in China is dominated by copper concentrates and pyrotechnic smelting of blister copper. The status quo is that the processing capacity is greater than the smelting capacity, smelting capacity has greatly exceeded the support capacity of copper concentrate, copper concentrate resources and scrap copper imports are required. Statistics show that in the 21st century, the output of domestic copper concentrate has not been significantly increased, maintaining an annual output of 600,000 tons (copper content, the same below), by the end of 2007 will form nearly 3.7 million tons of smelting capacity, far exceeding By then China's copper concentrate resources and the protection of the capacity of the international market may provide the amount of copper concentrate. The production capacity of copper mines in China can only meet 40% of the smelting capacity.
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