Preface
At the present time most of the corporations use both reflect kiln and out heating rolling kiln in China. And most of corporations abroad use multi chambers kilns.
As the development of molybdenum products market, the performance of the calciner and end gas controlling effect the corporation’ benefit.
The inner heating equipments designed and manufactured by our Co. used in molybdenum drying and calcining and the end gas controlling is more advanced than traditional ones in technology.
The system consists of the main parts of moly drying, inner heating rolling kiln system, collecting system, and mixing air system of direct heating furnace of burning coal.
The processes are as follows:
Put the moly concentrate powder into the dryer to dry and to average particle, and then the dried powder be fed to the bunker by conveyor, then to the kiln. Being the source of heating air the direct heating furnace supports hot air to rolling kiln to calcining the molybdenum.
The gas of sulfur dioxide generated during the production is treated by temperature adjuster, cyclone collector, bag collector, and static dust catcher. The air treated is let out. The treatment method of sulfur dioxide can be sodium sulfite and limestone. The first one cost higher and the other one is simple and much cheaper.
The main technology is in:
1. Using direct inner heating rolling kiln to calcine can make the life of the equipment much longer and heighten the thermal efficiency much.
2. The system equipped with dryer can reduce the acid materials out. As the materials being average therefore the calcining is full.
3. The system uses two collecting system the rate of collection is high.
4. The system is in the tiny negative pressure operation there is no dust out. The rate of collection is heightened.
Data of the system technology and performance
The detail is as follows:
1. Capacity : One system produces moly oxide 7～8 ton / h.
2. sulfur content in moly oxide is ≤0.07%
3. One ton moly oxide production cost standard coal about 350 KG.
4. One ton moly oxide production cost electricity 280kwh.
5. Rate of collection of the dust ≥99.5%
6. The energy for the system is about 120 kw.
