Allimand Sa

PULPING AND REFINING

PULPING AND REFINING

Pulping and refining are the two first pulp treatments in the papermaking process. They are essential to obtain the desired characteristics for the quality of the final fiber product. They are also essential for ensuring a good runnability of the sheet on the production line.
The design of Allimand machines is guaranteed by Allimand’s expertise in the areas of pulping and refining, its know-how and the experience gained through its new projects with high added value papers.

• PULPER
• REFINER
• DEFLAKING

PULPING AND REFINING

PULPER

The first part in a paper production line is the pulper which suspends the raw stock bales. The quality of suspension is very important for the efficiency of the treatments applied later on to the stock.
Our pulpers for virgin pulp and clean wastepaper are made up of:

• a tank made of mechanically welded stainless steel,
• a rotor, geometrically calculated,
• a stainless-steel drilled screen block,
• a drive by horizontal motor and gear reducer or vertical motor and belts.
  Their continuous or discontinuous operation modes can be manually or automatically controlled.

The pulping sequence can be optimized by adjusting the pulping parameters: temperature, working concentration, time of pulping, choice of additives and geometry of the drilled screen. Each type of pulp and paper has its optimum operating conditions. The main advantages of Allimand pulpers are that they are robust, save energy and have easy maintenance.