Temperature-controlled suspension roaster

Abstract

The invention relates to a temperature-controlled suspension roaster. The temperature-controlled suspension roaster comprises a cyclone separator, a preheating cyclone drum, a temperature-controlled roaster, a drier and a multistage cyclone cooler, wherein the cyclone separator is a two-stage cyclone separator which comprises a first-stage cyclone separator and a secondary cyclone separator, and the multistage cyclone cooler sequentially comprises a first-stage cooler, a middle-stage cooler and a final-stage cooler from the upstream to the upstream of the running path of material. The temperature-controlled suspension roaster has the advantages that the process arrangement is simple, the occupied land is small, and the operation and maintenance expenses are low; the roasting effect is good, the decomposition efficiency of magnesium carbonate is high, and magnesium oxide products with different purities can be obtained by changing calcination temperature; magnesite powder is dried and preheated by using discharged waste gas, the heat of high-temperature waste flue gas is fully recycled, and the heat efficiency of the roaster is improved; and the four-stage cyclone cooler has a good cooling effect and can be used for cooling a finished product magnesium oxide to be below 100 DEG C so that caloric content of magnesium oxide can be fully recovered for disintegrating magnesite and the energy consumption of the roaster can be reduced.

Description

technical field [0001] This patent belongs to the technical field of inorganic non-metallic material manufacturing, and in particular relates to a temperature-controllable magnesium oxide suspension roasting furnace. Background technique [0002] my country is one of the countries with the most abundant magnesite resources in the world. The proven magnesite reserves reach 3.564 billion tons, accounting for 28.7% of the world's total reserves, ranking first in the world. Therefore, the production of magnesia in my country is mainly based on calcined magnesite, light-burned magnesia is mainly calcined by reverberatory kiln, rotary kiln or fluidized bed furnace, and heavy-burned magnesia is calcined by shaft furnace. [0003] In the traditional process of calcining magnesite to produce magnesium oxide, whether it is a reverberatory kiln, a rotary kiln, or a shaft furnace, there are problems of high energy consumption, low product purity, serious environmental pollution, and low...

AI Technical Summary

Problems solved by technology

Using traditional kiln-type calcined magnesite, the exhaust gas will take away a lot of heat, resulting in high heat consumption of magnesia production and increasing product cost

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