Molybdenum carbide has a high melting point and hardness, good thermal stability and mechanical stability, and excellent corrosion resistance and other characteristics. Molybdenum is a silvery white refractory metal, a melting point of 2615 ℃, density of 10.2 g / cm 3, the expansion coefficient is small, a special tube is almost the same coefficient of expansion of the glass. Molybdenum stable at room temperature is higher than 600 ℃, rapidly oxidized.
2013年7月31日星期三
Environmental Protection Department will commence tungsten and molybdenum companies environmental verification
Ministry of Environmental Protection, said tungsten enterprises, including ammonium tungstate (salt), tungstic acid, tungsten oxide, tungsten powder production enterprises; molybdenum companies, including Molybdenum (molybdenum), molybdenum iron, ammonium (salt), molybdic acid, high purity molybdenum oxide, high purity molybdenum plating disulfide, molybdenum powder products manufacturing enterprises.
Environmental Protection Department today published guidelines for the verification of tungsten, molybdenum enterprises through setting a clear environmental verification conditions, in accordance with the requirements of environmental protection department, tungsten, molybdenum companies must meet seven requirements to pass environmental inspections.
Including, legally enforceable construction projects (including new and expansion projects) EIA approval and completion and acceptance of environmental protection systems; achieve total control of pollutant emissions requirements and sewage fees paid in full accordance with the law; major pollutants and characteristics of pollutants discharge standards.
MEP specifically asked through environmental verification of tungsten, molybdenum business, should have no serious environmental violations and verification does not occur within hours of major environmental emergencies or ecological damage event, "Verification period no major unexpected environmental level and above events or major ecological sabotage. "verification guidelines require, through verification companies also need the verification period has not been ordered deadline governance, limited production limitation or discontinuation remediation.
In addition, the verification period but also not subject to the provincial environmental protection department of environmental protection department or punishment.
Ministry of Environmental Protection, said the purpose of verification is to protect public health and safeguard the ecological environment safety, pollution prevention and control to improve the industry level. Meanwhile, the Department will continue to conduct environmental verification work, according to the program announcement environmental compliance tungsten, molybdenum list of enterprises, and regular and irregular conduct business through review and verification checks and found that there is not consistent with this approach, and will withdraw its list and announce it.
Ministry of Environmental Protection requirements, the provincial environmental protection department and the environmental supervision centers to strengthen the tungsten, molybdenum business daily law enforcement supervision, and urge enterprises to find and solve problems, for violations of environmental laws and regulations, tungsten, molybdenum enterprises, to punishment according to law, and will be investigated and dealt with promptly report Ministry of Environmental Protection.
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