Stacking methods

Stacking in a side scraper store is usually done by a ST stacker.

Cone Shell
The Cone Shell method is the most common used stacking method in Side Scraper stores, where homogenisation is not necessary.

The pile is formed by depositing material in a single cone from a fixed position. When this conical pile is full, the depositing of material moves to a new position and a new cone is formed against the shell of the first one.

This process continues in the longitudinal direction of the store until the stockpile is complete.

Windrow – open pile


With the Windrow method material is deposited from a number of positions across the full width of the pile.

The method prevents segregation and ensures more even distribution of fine and coarse particles across the pile.

The Windrow method is preferred in cases where segregation would make an open pile base unacceptable – typically in coal stores due to spontaneous ignition.

In order to be able to stack the material according to the windrow method the stacker must be a slewing type stacker.

Chevron


With the Chevron method material is deposited by the stacker moving to and fro over the centre line of the pile.

The method causes segregation of the material with fine particles in the central part of the pile and coarse particles on the surface and at the bottom of the pile.

Due to the reclaiming method used in a side scraper store it is not possible to achieve any considerable blending effect with the chevron stacking method.

Reclaiming methods

The Side Scraper runs on rails along one side of the pile.

The material is reclaimed by means of a scraper chain system which removes one slice at a time from the pile, while the Side Scraper travels along the pile. The scraper chain fitted with blades conveys the materials to the discharge point above the outgoing conveyor.

Alternative designs

In case of special requirements due to specific material properties or limited space, FLSmidth can offer a vide range of special designs.