A phase change furnace for preparing high-temperature alumina powder and its application method

Abstract

The invention belongs to the technical field of high-temperature alumina powder production equipment, and in particular relates to a phase change furnace for preparing high-temperature alumina powder and a use method thereof. In order to solve the problem of insufficient residence time of materials in existing devices during conversion, the invention discloses a phase change furnace for preparing high-temperature alumina powder, which includes a feed inlet, an outer shell, an outlet pipe, an overflow port, Wall, furnace lining, wall feed port, hood, air chamber, ventilating distribution plate, the fluidized powder gradually flows from the feed chamber to the discharge chamber through the wall feed port, and gradually accumulates in the discharge chamber. When the height of the material level in the discharge chamber reaches the overflow port, it flows out from the overflow port to obtain high-temperature alumina powder products. After adding the discharge port and the flow sealing valve, the phase change furnace of the present invention can also realize the preparation of metallurgical grade alumina powder, realizing multiple functions in one furnace. The invention successfully realizes the production of high-temperature alumina powder products in the phase change furnace, and compared with the traditional rotary kiln, the phase change furnace saves energy by more than 60%, saves land occupation, and has more stable production and operation.

Description

technical field [0001] The invention belongs to the technical field of high-temperature alumina powder production devices, and in particular relates to a phase change furnace for preparing high-temperature alumina powder and a method for using the same. Background technique [0002] High temperature alumina is one of the important products of special alumina, which is widely used in refractory castables, synthetic refractory raw materials and other fields. When producing high-temperature alumina powder, the powdery material needs to stay in the furnace for about 30 to 40 minutes to complete the transformation of the alumina crystal form, and the conversion rate is generally greater than 90%. The reaction temperature entering the phase change furnace needs to be 1350℃~1400℃. [0003] Traditional equipment such as rotary kiln has defects such as high energy consumption, large area and large capital investment, which cannot meet the needs of fierce market competition. And oth...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a phase change furnace suitable for the production of high-temperature alumina powder and its use method, to solve the problem of insufficient residence time of materials in existing devices during transformation, and to successfully realize the heating temperature in the furnace at 1350 Under the premise of ℃~1400℃, the material stays in the furnace for a long enough time to complete the crystal transformation, and obtain high-quality high-temperature alumina powder with a conversion rate greater than 95% in line with industry standards

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