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              EN CN

              Home / Products / Calcining & smelting

              Vertical preheate

              Main function of shaft preheater is that qualified limestone is sent to main body of preheater to exchange heat with counter flow high-temperature flue gas (about 1150℃) discharged from rotary kiln after calcination.

              Main function of shaft preheater is that qualified limestone is sent to main body of preheater to exchange heat with counter flow high-temperature flue gas (about 1150℃) discharged from rotary kiln after calcination.

              Working Principle

              Limestone is uniformly preheated to about 900℃ in preheater. Limestone decomposition rate reaches about 35% then hydraulic push rod device pushes limestone into rotary kiln quantitatively and sequentially for further calcination. Calcination process not only shortens calcination time of lime in kiln but also obtains lime with high activity.

              Product Features

                Besides electric control, preheater is mainly composed of five parts

              • Chamber feeding system

                It mainly includes upper chamber feeding bin and discharging chute. Volume of feeding bin is 450m3. Discharging mode and structure can ensure that feeding to preheater main body can be completely closed, so that external cold air can not enter preheater, and feeding can be realized continuously or intermittently with help of rod valve.

              • Preheater main body

                Which is most important part to ensure that materials are preheated to about 900 ℃. It is composed of preheater cylinder, distribution arch, suspension device and refractory brick lining (refractory is not within scope of supply). Most part of main body is steel structure, and some materials are made of heat-resistant steel, which can work at 1000-1100 ℃. In addition, updated design is adopted for structure of refractory brick lining, which can ensure that materials are evenly preheated in preheater and reach preheating temperature.

              • Hydraulic push rod device

                Which mainly includes push head, frame and connecting rod. Push head is made of heat-resistant steel casting and can withstand high temperature. Through electric control and hydraulic system, eight hydraulic push rods can be operated quantitatively and sequentially as per automatic control program.

              • Lower feeding chamber

                Which mainly includes chute, main main body of feeding chamber and feeding dish. Its main function is to introduce preheated limestone into rotary kiln for calcination.

              • Structural framework

                Which mainly consists of columns, ring beams, diagonal bracing rods and etc.. Its main function is to bear weight load of superstructure of preheater, weight of maintenance platform of hydraulic push rod frame, and thrust load of hydraulic push rod in operation.

              Specifications

              SN

              Item

              Unit

              Specification

              Remarks

              1

              Manufacturer

              ANDE

              2

              Model no.

              SY200

              3

              Designed capacity

              t/d

              200

              4

              Dimension

              Height

              m

              19.2

              External diameter

              m

              Φ5.6

              5

              Parameters of production process

              Exhaust temperature

              200~250

              Preheating time of limestone in preheater

              h

              >2h

              Flue gas temperature at preheater inlet

              950-1100

              Pressure drop of system

              Pa

              ~4500

              6

              Total weight of equipment

              t

              98.8

              Excluding refractory

              7

              Total installed motor power

              kW

              18×2

              1 in operation and the other for standby

              Performance
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              Contact

              Future Square, No.55 Industrial South Road, High-tech Zone, Jinan, China

              +86-0531-83323931
              huangfan@andeindustries.com

              ? 2020 ANDE Metallurgical Machinery Equipment Co., Ltd All rights reserved

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