It is imperative to develop efficient and clean ra

2022-08-17
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It is imperative to develop efficient and clean rapid magnesium smelting technology

Abstract: keep clean in the middle (it is best to clean after each experiment); China is a large country in the world's raw magnesium industry, and the output of raw magnesium accounts for more than 80% of the world. However, China's current raw magnesium smelting process is still dominated by the small pot Pidgeon process, which has been used for more than 70 years. This method uses a small alloy tank as the reduction container and gas or raw coal as the external heating fuel. There are many problems, such as low single output of a single tank, high energy consumption, high pollution, low degree of equipment automation, high magnesium oxide content in slag, and unable to be directly used. For this reason, the state has listed crude magnesium smelting in the Industrial Catalogue of restricted development. Therefore, it is imperative to develop efficient and clean rapid industrial magnesium smelting technology in the development of magnesium industry

China is a large country in the world's raw magnesium industry, and the output of raw magnesium accounts for more than 80% of the world. However, China's current raw magnesium smelting process is still dominated by the small pot Pidgeon process, which has been used for more than 70 years. This method uses a small alloy tank as the reduction container and gas or raw coal as the external heating fuel. There are many problems, such as low single output of a single tank, high energy consumption, high pollution, low degree of equipment automation, high magnesium oxide content in slag, and unable to be directly used. For this reason, the state has listed crude magnesium smelting in the Industrial Catalogue of restricted development. Therefore, it is imperative to develop efficient and clean rapid industrial refining and explain the testing process of rubber tensile testing machine magnesium technology in the development of magnesium industry

"Improve the utilization level of new materials

in the past 20 years, in view of the problems existing in the Pidgeon process, researchers have mainly focused on the discussion and improvement of the raw materials, temperature, reduction tank specification, heating mode and other aspects of the Pidgeon process, and achieved some results, but it is difficult to fundamentally solve the disadvantages of the small tank Pidgeon process.

Wang Xiaogang team of Xi'an University of science and technology proposed and designed the internal heating shaft furnace as a large reaction magnesium smelting container With clean electricity as the heating method and convenient electricity as the heating source, we try to thoroughly solve the fundamental problems of high pollution, high energy consumption and high labor intensity in the reduction process

recently, the team has basically achieved a rapid, efficient and continuous process of refining magnesium through industrial experiments, and its various indicators are better than that of the Pijiang method, the overall equipment of industrial experiments

success of semi industrial test of electric internal heating method

during the semi industrial test that lasted for nearly 4 years, the team of Wang Xiaogang carried out more than 10 tests with the charging capacity of the semi industrial test furnace of about 1.5 tons as the index, and obtained a series of industrial parameters and process indicators

new progress has been made in industrial tests

on the basis of semi industrial tests, the team further enlarged the test device and designed and manufactured a rapid magnesium smelting furnace with a charging capacity of more than 4 tons. During the industrial test, a total of 4 tons of raw materials and bedding materials were added, of which about 2 tons were pellet materials and about 2 tons were reduced magnesium slag as insulation bedding materials. The maximum temperature rise during the test was 1275 ℃, with a total power consumption of 2650kwh. The vacuum degree in the whole high temperature stage was maintained at 10pa-15pa

the reduction cycle of the whole high temperature section measured by changing the angle is 4 hours, and the energy consumption of this section is about 1620kwh, accounting for 61% of the total energy consumption. The crude magnesium is 320kg, the feed magnesium ratio is about 6.25, and the power consumption per ton of magnesium is about 8280kwh. The purity of the obtained crude magnesium is about 99.903wt.%. The impurity content in crude magnesium is shown in Table 2, and the impurity content is mainly silicon and calcium, which may be related to the volatilization of calcium and silicon compounds under vacuum conditions

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