Device and method for pre-melting crude magnesium with waste heat of reduced magnesium slag
A pre-smelting and magnesium slag technology, applied in the field of smelting, can solve the problems of difficult promotion, lack of technology and equipment, and high cost, and achieve the effect of large promotion value, saving crude magnesium refining time and small investment.
Active Publication Date: 2017-06-06
郭世平
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Problems solved by technology
However, the operating cost of these methods is often higher than the original value of waste heat, and it is not easy to promote in actual production
So far there is no ideal and mature process and equipment
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[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0018] see figure 1 , 2, the present invention pre-smelting coarse magnesium device is arranged between the reduction furnace and the refining furnace, the heat source is the high temperature magnesium slag produced by the reduction furnace and sent to the pre-smelting device for supply through the transfer device.
[0019] The device for pre-smelting crude magnesium includes a pre-smelting chamber capable of collecting reduced magnesium slag 11, the top of the pre-smelting chamber is provided with a rough magnesium fixed platform, and a plurality of crucibles 4 for containing crude magnesium 2 are arranged on the rough magnesium fixed platform , The crucible 4 is equipped with a crucible cover 3 and a temperature sensor 5 for detecting the heating temperature. The pre-smelting chamber is provided with a smoke exhaust port 8 and an ash discharge port 12. The...
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The invention discloses a device and a method for pre-melting crude magnesium with waste heat of reduced magnesium slag. The pre-melting device comprises a pre-melting chamber, wherein the pre-melting chamber can be used for collecting reduced magnesium slag; a crude magnesium fixing platform is arranged at the top of the pre-melting chamber; a plurality of crucibles for holding crude magnesium are arranged on the crude magnesium fixing platform; a fume discharge hole and an ash discharge hole are formed in the pre-melting chamber; and an ash discharge valve is mounted on the ash discharge hole. The pre-melting method comprises the following steps: taking reduced high-temperature magnesium slag as a heat medium, performing pre-melting on crude magnesium, putting the reduced high-temperature magnesium slag into the pre-melting chamber from the upper part of the pre-melting chamber by using a high-temperature magnesium slag transfer device, and after the crude magnesium absorbs heat and is molten into a magnesium liquid, discharging the magnesium slag of which the heat is completely released to a low-temperature magnesium slag transfer device from the ash discharge hole. By adopting the device and the method, waste of the waste heat of the magnesium slag in the magnesium smelting process can be reduced, and the crude magnesium refining efficiency can be improved.
Description
technical field [0001] The invention relates to smelting technology, in particular to a device and method for pre-smelting crude magnesium by utilizing the residual heat of reduced magnesium slag. Background technique [0002] In 2015, my country's magnesium output was 859,200 tons. Calculated by producing 6-8 tons of magnesium slag per ton of magnesium, the generated magnesium slag will reach about 6 million tons. The current production process of reducing furnace slag is still intermittent. The temperature of magnesium slag just out of the furnace is as high as 1200°C, with huge physical sensible heat, and the specific heat is 782J / (kg·°C). If calculated according to the room temperature of 25°C, when the magnesium slag drops from 1200°C to room temperature, 1kg of magnesium slag can release about 919kJ of heat. In 2015, the waste heat of magnesium slag can be equivalent to 1.14 million tons of standard coal (Ji Kedan. Research on the kinetics of cold hydration reaction of...
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IPC IPC(8): C22B26/22F27D17/00
CPCC22B26/22F27D17/004
Inventor 郭世平郭静静高波李宁李威君高源
Owner 郭世平