Jaw Crushers are used as alternatives to Gyratory Crushers as primary crushers in Zinc, Lead, Copper and Gold Mining when the throughput needed is less than 500 – 600 metric TPH.
Vibrating Feeders are extensively used to reclaim ROM/ Large Size ores from Dump Hoppers for primary crushing at mine end Ore Handling.
Dajia has agency design, produce and install this equipment, which are required as Secondary (150/ 75 mm) and Tertiary Crushers (30/10 mm) in Beneficiation circuits.
Dajia product range includes all types of drive and non-drive pulleys, and idlers.
Rod Mills (Grinding Ball Mill)
In most of Zn-Pb-Cu-Au mining circuits, final crushed ore from tertiary crushers is ground to (-) 1mm by rod mills. Where High Pressure Grinding Rolls are used secondary and tertiary crushing as well as rod milling is dispensed with. Dajia has a large range of rod mills to suit most ore characteristics and product requirements.
Vibrating Screens are used to segregate various size fractions in ore streams. Sometimes used to reduce load on crushers by removing fraction which is already smaller than required size and at other times Vibrating Screens are used to recirculate oversize fractions from crushed product stream back to crushers. Possible application is in Mines before despatch to beneficiation plants and also in beneficiation plants. Vibrating Screens are available in 1, 2 and 3 decks to get 2, 3 and 4 size fractions respectively. Each size fraction may be requiring different post processing.
Rotary Disc Feeders
Rotary Disc Feeders are continuous volumetric device reclaiming dry small lumps, coarse, fine grained and powdery material from surge bins and hoppers to feed subsequent equipment. Rotary Disc Feeders can be used in chemical conditioning slurry tanks for dosing reagents.
Linear Screens are used for similar applications but in more demanding situations, e.g.-
Where the height is limited by surrounding facilities,
For the screening of small and short fractions
Where required throughput is high.
Grizzly Screens are used in primary crushing operation as scalping screen in downstream of the Primary Ore Crusher to separate undersized and oversized ore. Typical separation is at 80 mm. Grizzly Screens are also used as Feeders to reclaim ore from Hoppers/Bins.
In Beneficiation plants usually the process involves transporting of Ore Slurry (suspension of Crushed/ Ground Ore in Water) between various stages. This is done by use of Slurry Pumps. Dajia has a vast range of Horizontal and Vertical Centrifugal Pumps catering to Slurry Pumps requirements.
Thickeners are used to concentrate Ore Slurry (30-35% Solids) from various stages of flotation to about 60- 70 % Solids. Overflow product is mostly water and is recycled into circuit whereas the underflow is taken for filtration (in case of Concentrate Thickeners) or to tailings as reject disposal.
Flotation Cells are used for removal of specific impurities ore separation of different metallic particles from multi-metal ore slurries. Tests determine the size and configuration of the Flotation Cell Banks.