Daye Nonferrous Refinery Steam Selenium Sand Roasting Technical Improvement Domestically Advanced Level
Steamed selenium sand roasting is the first important process for the production of gold and silver products. This process plays an important role in improving the quality and output of gold and silver products, reducing production costs, and improving production efficiency. In order to ensure the quality of silver (silver products have reached international standards) and further increase the production of gold and silver, the plant's technology department aims at burning selenium-burning kiln burners: the burner type is too small, the natural gas is not fully burned, the temperature zone is easy to turn off, and the flame is turned off and then reignited. Difficulty, technical problems such as low life cycle of the burner core components were studied, and through repeated comparison of various burner data used by peer manufacturers, three Italian TBG-55P type combustion engines were finally selected. After the combustion engine was put into use The combustion of natural gas is sufficient, the CO2 content in the flue gas is ≤0.1%, and the ignition is convenient, the temperature control is stable, and the technical requirements of the process to the temperature are met. Not only can the life of the rotary kiln be extended, but only natural gas consumption can save costs of 278,600 yuan.
Dry weather is the "culprit" of cold
"The child has been suffering from a cold for more than two weeks. He has a fever and a runny nose. At first, I thought he had a common cold, so I went to the nearby clinic to buy medicine, but it didn't work. Now the child not only coughs, but also has blisters on his mouth and nosebleeds at night. This year has passed without much comfort..." at a maternal and child health care hospital in Chaoyang District, Beijing, The child's parents, Ms. Zhao, said in distress.
According to the pediatrician of the hospital, there is a high incidence of respiratory diseases in children this winter. The main reason is that the weather is dry this year, there is no snow, and there are many bacteria and dust in the air. From the reception situation, the patients are basically mycoplasma infection or chlamydia infection, including many cross infections.
Zhang Xingchao, deputy director of internal medicine of Beijing hospital, introduced that due to the low air humidity, the influenza virus propagates faster in a dry environment and survives on floating dust, which will accelerate the spread of cold. However, due to the failure of "wet deposition", it will also cause serious urban air pollution and easily lead to respiratory diseases such as asthma and pneumonia.
The medical staff of the cardiovascular department of Beijing Municipal People's hospital told reporters that since the beginning of winter, there has been a long drought without rain (snow), the weather is warm and dry, and people's life is irregular during the Spring Festival, resulting in changes in human physiological functions, slow blood flow speed and increased blood viscosity. Middle-aged and elderly patients with hypertension and hyperlipidemia are prone to cerebrovascular spasm, coronary heart disease and other diseases. These diseases have strong concealment, sometimes come quickly and seriously, and are easy to lead to sudden death. Before and after the Spring Festival, the number of middle-aged and elderly patients with cardiovascular disease increased abnormally, especially the elderly over 65 years old.
Wang, director of cardiovascular department of Beijing Municipal People's Hospital, reminded that in the current extremely warm and dry weather environment, the effective way to prevent cardiovascular disease is to drink more water, eat less meat, exercise more and keep warm. Especially the middle-aged and elderly people with "three high" should pay special attention
Experts suggest that in a dry environment, Aroma Diffuser can be used to alleviate air drying, moisturize the skin and solve the problem of drying
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