Efficient and energy-saving magnetizing roasting rotary kiln

Abstract

The invention discloses an efficient and energy-saving magnetizing roasting rotary kiln comprising a driving motor, a feeding device, a rotary drum (6) and a transmission supporting mechanism (10) of the rotary drum, an electric heating furnace and an electric heating element (7), a waste gas discharging device (1) and a material discharging device (12), wherein the rotary drum (6) is internally provided with a temperature monitoring device (8); the waste gas discharging device (1) is located at the upper part of one side of a kiln tail; the feeing device is located at the outer side of the kiln tail; the material discharging device (12) is located at the lateral lower part of a kiln head; and the feeding device is composed of a feeding hopper (2) and a screw feeder (3). An adjusting screw rod device is arranged at the bottom of the rotary drum (6), and a mounting inclined angle is adjustable in a range of 0-2.5 degrees. A three-blade material overturning wall scraper device (13) is arranged between a front end pre-heating section and a roasting section of the rotary drum (6); a fixed flange bracket (9) is arranged on the inner wall of a drum in front of the three-blade material overturning wall scraper device (13); an hearth outer rotary drum of the rotary drum (6) is a carbon steel compound rotary drum (5); and the carbon steel compound rotary drum (5) is filled with a heat-insulating material. The efficient and energy-saving magnetizing roasting rotary kiln is stable and reliable in operation and can effectively prevent roasted materials from being stuck on the inner wall of the rotary kiln even forming a ring; and the rotary kiln solves the key technical problem of the existing roasting rotary kiln that the ring is easily formed in the kiln and the production efficiency is influenced, and the working efficiency of the rotary kiln is high.

Description

technical field [0001] The invention relates to a rotary kiln, in particular to a rotary kiln for magnetization reduction roasting, which is used for the magnetization reduction roasting of low-grade iron ores that are difficult to separate by conventional mineral processing methods, and which cannot be obtained by other mineral processing methods. It is especially important for ores with technical indicators, such as refractory hematite, siderite, limonite and other iron silicate minerals. Background technique [0002] As we all know, there are a large number of low-grade refractory hematite, siderite, limonite and other iron silicates and other mineral resources in China, which are characterized by large reserves and low iron grade, and the iron grade is generally 20-35. %, the content of harmful impurities is high, and the embedded particle size is fine. At present, the use of this part of resources is to use conventional mineral processing methods for enrichment and re...

AI Technical Summary

Problems solved by technology

The rotary kiln has the function of saving energy and improving the production capacity of the rotary kiln, but it still cannot solve the problem of low-melting point substances encountered in the magnetization roasting of low-grade refractory hematite, siderite, limonite and other mineral resources such as iron silicates. Phenomena such as reflow, bonding, and ring formation occur, and the energy consumption is large

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