Black talcum powder-shaped suspension calcining and whitening device and process

Abstract

The invention discloses a black talcum powder-shaped suspension calcining and whitening device and a process. A powdery calcined black talc product with the whiteness being greater than 90% is obtained. The process comprises the following steps: firstly, taking black talcum as a raw material, beneficiating, crushing and grinding to obtain black talcum powder; preheating the black talcum powder byadopting a multi-stage series suspension preheater, feeding the preheated black talcum powder into a suspension calcining furnace system for calcining, and combusting and releasing organic matters inthe black talcum powder; and finally, discharging the calcined talcum powder from the suspension calcining furnace system to enter a multi-stage series suspension cooler to be cooled. The device is composed of the multi-stage series suspension preheater, a first-stage cyclone separator, a first-stage suspension calcining furnace, a second-stage cyclone separator, a second-stage suspension calcining furnace, an auxiliary combustion ignition chamber, the multi-stage series suspension cooler, a fluidization cooler and the like, and the whole process of preheating and calcining black talcum powderand cooling finished product calcined talcum powder is completed in a suspension state. The process is advanced, green and energy-saving; the automation degree is high, and intelligence can be achieved; and the single-line production scale can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of black talc whitening, in particular to a black talc powder suspension calcined whitening device and process. Background technique [0002] The main mineral in black talc is talc, with a content of more than 92%. In addition, it contains about 5% of quartz and about 2% of organic matter. The organic matter in it is the main reason for its blackening. my country's black talc is very rich in resources, but its application is limited due to its low whiteness. In order to expand the application field of black talc, appropriate measures must be taken to improve the whiteness of black talc. Calcination treatment is an effective method. Calcined talc can be superfinely crushed to obtain high-quality high-white superfine powder. After calcining, the whiteness can be greatly improved. It has good insulation, heat resistance, adsorption, lubrication and other properties. It is widely used in coatings, plastics, rubb...

AI Technical Summary

Problems solved by technology

Due to the calcination of massive black talc, the thermal efficiency of the above-mentioned process equipment is low, the heat consumption of calcination is high, it is difficult to guarantee the uniformity of product quality, and there are phenomena such as inner under-burning to varying degrees.

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