Atomizing powdering device and atomizing powdering method

Abstract

A atomizing powdering is provided and is provided with an open smelting furnace used for melting steel and a tundish for receiving molten steel. The molten steel in the open smelting furnace is kept sufficient so that the tundish can quickly receive the molten steel from the furnace, thereby pouring a spray ladle. Further, on the one hand, a plurality of tundishes, such as two, can be designed such that the two tundishes can alternately receive molten steel from the open smelting furnace and carry out continuous multi-pack casting of the same spray ladle. On the other hand, multiple spray ladles can be designed to save time in replacing the spray ladles. In this way, the time and operation rate of the powdering process can be improved, and the refractory material in the spray ladles can besaved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of metal powder making, and in particular to an atomized powder making device and an atomized powder making method. Background technique [0002] Atomization powder production refers to the powder production method that breaks metal or alloy liquid into fine droplets by the impact of fast-moving fluid (atomization medium), and then condenses into solid powder. Atomized powder is the best way to produce fully alloyed powder, and its product is called pre-alloyed powder. Each particle of this powder not only has the same uniform chemical composition as the given molten alloy, but also refines the crystal structure due to rapid solidification, eliminating the macro-segregation of the second phase. [0003] The vacuum air atomization powder making method is a new type of process developed in the metal powder manufacturing industry in recent years. It has the advantages of not easy oxi...

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Problems solved by technology

[0005] based on figure 1 The shown atomization equipment carries out atomization pulverization, has the following defects: 1) pulverization operation rate is low: smelting furnace, for example, the smelting furnace that can hold the quality of molten steel is 200-500kg, from melting raw material to molten steel to temperature, The preparation time is 90-100min; the milling time is 15-30min; the 24h continuous production milling time is only 3-4h

2) The cost of refractory materials (that is, refractory materials) is high, and the refractory materials need to be replaced every time molten steel is poured

However, in the actual milling process, the smelting furnace needs to prepare a new batch of molten steel after pouring one batch of molten steel into the spray ladle 130, and when the spray ladle 130 receives one batch of molten steel, that is, after 300kg of molten steel, due to the There is no heating device around the draft tube, so the molten steel flowing through the draft tube will gradually cool down, causing the molten steel to hang on the inner wall of the draft tube or block the draft tube. If a new batch of molten steel is prepared in the smelting furnace 120 In the future, if you continue to pour the spray bag 130, the atomization effect will be seriously affected. Therefore, even if the service life of the refractory material is not exhausted, the refractory material must be replaced

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