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                            IMPEX

                            Equipment

                            CALCINATION / HEAT TREATMENT

                            furnace.jpg (84657 bytes)

                            Multiple
                            Hearth Furnace
                            click to enlarge

                            HANKIN MULTIPLE HEARTH CALCINERS
                            Calcining, or heat soaking, alters the crystal structure of minerals, producing new, value-added characteristics to the mineral, such as high brightness with low abrasion. Normal temperatures range from 1500°-2100°F for periods of up to 60-minutes. This calls for a furnace capable of reliable, efficient and continuous operation for tens of thousands of hours. The Hankin multiple-hearth calciner is a vertical furnace comprised of alternating in and out hearths. The number of hearths is determined by the desired product rate, the process requirements (for time and temperature), and any pre- or post- temperature conditioning. Material is moved through the calciner by rabble teeth, or plows, driven from a central (vertical) shaft. Top feed, bottom outlet.

                            • Reliable process rate, product characteristics and efficiency predicted from laboratory evaluation.
                            • Stationary refractory for maximum thermal insulation and long life with low maintenance.
                            • Good turn-down ratio and flexibility.
                            • Accurate control of product residence time.
                            • Low dust carry-over.
                            • Minimum operator attention, suitable for automation.
                            • Small space requirement.
                            • Burners can be mounted on individual hearths with up to 4 burners per hearth.
                            • Burner mountings eliminate direct flame impingement on product.
                            • Burner management provides safe, precise and efficient combustion with accurate control of temperatures and atmosphere.
                            • Efficient heat transfer produces low heat input per ton of product.
                            • Feed preparation and product systems can be designed and provided.
                            • Many installations for various applications providing extensive experience.

                            Information Available
                            Equipment Brochures

                            PO Box 1028, Milledgeville, GA USA 31061 Telephone: 478-452-5636?Facsimile: 478-452-5636?Email: contact@impexequip.com
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