System and method of induction heating liquid mixing continuous magnesium production

Abstract

The invention discloses a system and method of induction heating liquid mixing continuous magnesium production. The system comprises a silicon iron raw material bin, a magnesium ore raw material bin,a flux raw material bin, a feeding mechanism and a smelting mechanism. Each raw material bin is provided with an inert gas inlet and a vacuuming port. The smelting mechanism comprises an airtight chamber and an induction furnace. The induction furnace is arranged in the airtight chamber. A feeding pipeline and an exhaust gas pipeline are arranged on the top of the induction furnace. The feeding pipeline extends out of the airtight chamber and is connected with a screw conveyer. The exhaust gas pipeline extends out of the airtight chamber. A slag outlet and an iron outlet are arranged on the side on the induction furnace. The induction furnace is further provided with a stirring paddle. The airtight chamber is provided with an inert gas inlet on the side wall. The induction furnace is provided with an inert gas inlet on the side wall. The airtight chamber is provided with a vacuuming port on the top wall. The exhaust gas pipeline is provided with a vacuuming port. According to the system of induction heating liquid mixing continuous magnesium production, because the negative micro-pressure operation or normal-pressure operation is adopted, continuous feeding and discharging can be implemented, continuous production of the metal magnesium is implemented, and the production cost is reduced; and splashing can be effectively reduced, the quantity of soot is effectively reduced, thequality of original magnesium is improved, and the stable running state of equipment is improved.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular, the invention relates to a system and a method for inductively heating liquid-state stirring continuous magnesium smelting. Background technique [0002] At present, the vast majority of domestic magnesium production still adopts the traditional Pidgeon process, which has at least the following disadvantages: (1) Most of the processes on the production site rely on manual operations, which is labor-intensive and has many potential safety hazards; (2) Magnesium smelting It is intermittent production, with long reduction cycle and low production efficiency; (3) The production process is fully open, with a lot of dust and exhaust gas on site, high noise, and serious environmental pollution; (4) Vacuum reduction tanks are expensive, have a short service period, and are used in large quantities (5) The reduction smelting adopts the external heating method, and the heat utilization efficiency i...

AI Technical Summary

Problems solved by technology

[0002] At present, the vast majority of domestic magnesium production still adopts the traditional Pidgeon process, which has at least the following disadvantages: (1) Most of the processes on the production site rely on manual operations, which is labor-intensive and has many potential safety hazards; (2) Magnesium smelting It is intermittent production, with long reduction cycle and low production efficiency; (3) The production process is fully open, with a lot of dust and exhaust gas on site, high noise, and serious environmental pollution; (4) Vacuum reduction tanks are expensive, have a short service period, and are used in large quantities (5) The reduction smelting adopts the external heating method, and the heat utilization efficiency is low; (6) The magnesium reduction reaction is a solid-solid reaction, the reaction rate is slow, and the raw material utilization rate is low; (7) The reduction smelting needs to be carried out under vacuum conditions, and the vacuum The system is complex and the energy consumption is high; (8) the reduced magnesium vapor is condensed into a solid state at the mouth of the tank, and there are many impurities, which need to be reheated, melted and purified, and the energy consumption is high

Since there is no heating device in the vacuum chamber, the reduction of magnesium and the evaporation of metal magnesium are both endothermic reactions, and the magnesium ore powder needs to be injected into the ferrosilicon liquid, which will easily reduce the temperature of the melt in the ferrosilicon ladle and increase the viscosity of the melt. High, the reduction reaction rate is reduced, and it is easy to cause insufficient superheating of magnesium vapor to condense in the pipeline

Even if the heating method is also used in the injection process as shown in CN105970004A, CN105950889A, and CN107541608A, because the amount of injected gas is too much, a large amount of heat from the melt will be taken away, reducing the thermal efficiency of the device

Moreover, the injection will also produce a large amount of smoke and dust, which will pollute the device and the flue gas system, reduce the purity of metal crude magnesium, and increase the burden of subsequent flue gas treatment and magnesium refining

In addition, magnesium-containing raw materials such as the calcined white used not only need to be ground very finely, but also tend to absorb water and deliquesce, block the material pipe, and are not easy to stabilize production

Moreover, most technologies need to maintain a vacuum environment in the system, which increases the burden on the system, thereby increasing energy consumption and cost

[0005] In summary, the existing systems and methods for smelting magnesium still need to be improved

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