An increasing amount of powdered material is being handled in the pulp and paper industry because:
- Pressure is being put on manufacturers to re-use waste products such as paper and board and this involves the use of powdered materials to de-ink and treat effluent.
- Titanium dioxide, which gives good opacity with high brightness, is becoming more widely used as a material pigment for paper filling, particularly for bible or diary paper, or to improve colour printing
- qualities.
- Modern pulp and paper techniques now often involve the use of food based powdered materials including casein, starch and gelatine.
This trend has brought, or underlined, ongoing problems including how to:
- Reduce emissions to atmosphere.
- Improve working conditions.
- Reduce costs.
Spiroflow solutions
Although the materials mentioned are traditionally handled by manual methods, in a modern pulp and paper plant they are normally handled in Big Bags (FIBCs) and, because of the large quantities used, these containers are taking the place of 25kg sacks.
Several advantages are gained:
- Dust emission to atmosphere is drastically reduced as the flow of the powder is contained in a sealed discharge and conveying system. When a traditional sack is opened, some of its contents inevitably escape and contaminate the atmosphere. Loss of product on this account is almost entirely eliminated with the use of Big Bags.
- There is no heavy lifting involved in the use of Big Bag equipment and a potential cause of personnel injury is removed. The equipment becomes popular and accepted by personnel for this reason.
- Costs are reduced because purchases of materials delivered in Big Bag quantities instead of sacks may be at discounted prices. Also, labour expenditure, including the hidden costs involved in any personnel injuries, are less because heavy manual effort is eliminated. Further savings can be made as stock control is easier. The amount of material remaining in a Big Bag can quickly be seen on the control panel of the discharger and centralised computer inventory control is possible.
The right equipment
Spiroflow has developed a comprehensive range of Big Bag handling equipment and associated closed conveyors for use in the pulp and paper industry. There are standard models for use where height restrictions demand compact units, and for where occasional deliveries of materials in 25kg sacks as well as Big Bags continue to be made.
Special accessories provide for the discharge of materials with difficult flow characteristics. The equipment is robustly built for trouble-free service over many years and incorporates the experience gained by Spiroflow as the leading manufacturer in this field.
- Acetic Acid
- Aluminium Sulphate
- Amonium Hydroxide
- Calcium Bisulphite
- Calcium Carbonate
- Calcium Hydroxide
- Calcium Hypochlorite
- Ethyl Alchohol
- Formic Acid
- Hydrochloric Acid
- Oleic Acid
- Oxalic Acid
- Palmitic Acid
- Phosphoric Acid
- Polyvinyl Acetate
- Potassium Hydroxide
- Propionic Acid
- Sodium Bicarbonate
- Sodium Bisulphate
- Sodium Borohydride
- Sodium Carbonate
- Sodium Chloride
- Sodium Hydrosulphite
- Sodium Hydroxide
- Sodium Hypochlorite
- Sodium Sulphate
- Sodium Thiosulphate
- Sulphur Dioxide
- Sulphuric Acid
- Titanium Dioxide
- Wood Flour
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