How to Convey Hot Stuff

Apron Conveyor

How to Convey Hot Stuff

Steel Apron Conveyor for Transport of hot Bulk Solid Materials
Steel apron conveyors are heavy duty conveyors especially for high temperature bulk materials. In the following some design specifications for a long lasting, failure free operation of such systems are presented by means of a newly developed solution.
(ed. WoMaMarcel - 09/10/2015)
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Fig. 1: The newly developed apron conveyor has beeb designed with special respect to efficiency, rigidity and applicability for inclined conveyance.

During the development of the new steel – apron conveyors system SZB 250 the known requirements of the cement plants were reconsidered  and, based on the existing experiences, new solutions produced. The cement plants’ most significant requirements are the following:

  • efficiency,
  • rigidity, and
  • applicability for inclined conveyance.

Keeping these main features in mind a modular design was developed which provides numerous alternatives.

The efficiency is governed by availability, durability and maintenance costs of the steel-apron conveyor system. During the design phase of the new conveyor special attention was paid to these features.

Three different modules are the basis of the SZB 250 apron conveyor — conveyor cell, roller and chain with their common interface at the attachment point. This interface point is dimensioned in such a way, that it is applicable for all dimensions of rollers and chains thus drastically reducing the diversity of parts. This common interface point is easily accessible, essentially alleviating maintenance and servicing.

Due to weight limitations the stability  of the conveyor may not be achieved through extensive material usage, but rather through constructive measures which are aimed at decreasing the level of strain of the apron conveyor system. These constructional measures include:

  • short lever arms,
  • elf-supporting conveyor cell system,
  • wide base for the fixation, and
  • framework construction for the conveyor cell.

During inclined conveyance of hot materials the apron conveor is subjected to especially high demands regarding

  • leak tightness,
  • wearing performance, and
  • dead load.
  • Here the SZB 250 is believed to set new standards.

Fig. 2: Longitudinal and transversal section of the newly developed steel-apron conveyor.

Fig. 2 presents the longitudinal and cross section of the steel — apron conveyor  SZB 250 where the basic assembly and operting mode is visible whereas Fig. 3 shows the three modules which form the conveyor:

  • Pos. 1: Apron conveyor cell
  • Pos. 2: Roller with retainer
  • Pos. 3: Chain

Fig. 3: Elements of an apron conveyor: 1 - Conveyor cell; 2 - Roller with retainer; 3 - Chain

These modules merge at the attachment point. This merger point is the same for all variations of the apron-conveyor, so there is no dependency with regard to  the size of either chain or roller. A roller change is very easy and can be performed with simple tools due to the good accessibility. This alleviates preventive servicing and maintenance of conveyor system thus to the conveyors high availablility. The possibility to fix a roller on every conveyor cell impressively substantiates the modularity of the  system.

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