Acidification Roasting Rotary Kiln (Acidification Kiln)

Applications

Suitable for the acidification roasting of lithium concentrates such as spodumene and ferromagnetite, with heating temperatures ranging from 200°C to 350°C.

Product Description

This type of kiln features two support types: rolling and sliding. The drive can utilize DC or AC variable frequency speed regulation, and various seal types are available to accommodate different operating conditions. The company can design custom kilns to meet specific customer requirements. The rotary kiln consists of a cylinder, a transmission mechanism, support and retaining wheel systems, a kiln tail seal, an external jacket, a combustion system, a hot air duct system, and a kiln head hood. The kiln barrel is the heated, rotating component, constructed from high-quality carbon steel sheets welded together. It is supported on a support structure by wheel tyres, and mechanical or hydraulic stoppers are installed on one or more of the support structures to control axial movement. A transmission mechanism, via a ring gear located in the centre of the barrel, rotates the barrel at the required speed for the process. For installation and maintenance purposes, larger kilns are equipped with an auxiliary transmission that allows the barrel to rotate at a very low speed. To prevent cold air from entering and flue gas and dust from escaping the barrel, reliable sealing devices are installed at the inlet and outlet ends of the barrel. To ensure efficient external heating, special air ducts are installed within the jacket to ensure thermal efficiency and precise temperature control. Special anti-sticking devices are installed on the outer and inner walls of the barrel to ensure smooth material flow.

Highlights
● Acidification kilns can be designed in various configurations to meet customer needs and operating requirements.
● To ensure efficient external heating, special air ducts are installed within the jacket to ensure hot air efficiency and precise temperature control, guaranteeing the conversion rate of the acidified material.
● The lithium concentrate acidification kiln utilizes large-diameter, low-aspect-ratio support roller bearings for enhanced reliability. The bearings are self-aligning.
● The spring-laminated flexible seal and double-layer spring-laminated seal provide an additional insulation layer, enhancing the reliability and service life of the lithium concentrate acidification kiln.

Operating Principle
The rotary kiln consists of a drum, transmission mechanism, support and retaining rollers, kiln tail seal, external jacket, combustion system, hot air ducting system, and kiln head hood. The kiln barrel, the heated, rotating component, is made from high-quality carbon steel sheets welded together. It is supported on a support structure by wheel tyres, and mechanical or hydraulic stoppers are installed on one or more of the support structures to control axial movement of the barrel. A transmission mechanism, via a ring gear located in the centre of the barrel, rotates the barrel at the speed required by the process. Due to installation and maintenance requirements, larger kilns are equipped with an auxiliary transmission that allows the barrel to rotate at a very low speed. To prevent cold air from entering and smoke and dust from escaping the barrel, reliable sealing devices are installed at the feed and discharge ends of the barrel. To ensure efficient external heating, special air ducts are installed within the jacket to ensure thermal efficiency and precise temperature control of the hot air. Special anti-sticking devices are installed on the outer and inner walls of the barrel to ensure smooth material flow.