30-07-2012, 01:19 PM
TUTOR SEARCH & REGISTRATION SYSTEM AT CORE INFOCOM (P) LIMITED GANDHI NAGAR,JAIPUR
TUTOR SEARCH.docx (Size: 1.15 MB / Downloads: 46)
ABOUT HZL ,DEBARI
Zinc smelter Debari , is a unit of Hindustan Zinc Limited. It was started in 1968. It was the first Zinc smelter of HZL. In this plant, zinc along with its products viz. Silver, Cadmium, Sulphuric acid etc. are produced from Zawar Mines and other mines of the company. Initially this Smelter started with 18,000 tonnes per annum capacity, but at present the capacity of plant is 49,000 tonnes per annum, the recovery of Zinc in this plant is 99.52%.
ACID PLANT
Gases coming out of hot gas precipitator have 7-8% SO2 & at 3300C. In this section SO2 Gas at temp 3300C is passed through scrubbing tower, which has sedimentation tank & SO2 stripper & wet gases precipitator is obtained at temp 550C. SO2 gas has moisture. This SO2 gas is first dried in a drying tower with H2SO4 to remove the moisture content.
LEACHING AND PURIFICATION:-
Leaching is a selective dissolution of ore minerals /oxide minerals in acid or solution of other reagents according to the condition adjusted in a manner to leave maximum gangue in the insoluble residue. Calcine comes into the hopper from roaster with the help of bucket elevators. From the hopper the calcite is coming to a redder conveyor through a rotatory value.
By adjusting the speed of the rotatory value calcine directly into puchuua. The calcine if expand in stored in sizes The average rates of calcine consumption is 11MT/hr, whereas the rate of solution supply is 90 m3/hr . this corresponds to 140-150MT of Zinc ingots per day.
Solution cooling and storage:
Neutral electrolyte from purification shall be available at 60-70% as hot purification process has been adopted for expansion. The neutral solution is fed directly to atmospheric coolers where solution is cooled to 35oC, coolers have been provided for this circulating spent solution cooled in separate 5nos. coolers out of which normally three are in services and two are standby. Here temperature drop is from 42oC to 35o. Gypsum deposit take place in these coolers.
ZIN DUST PLANT
Zinc dust is produced in the Zinc dust plant. Zinc dust is produced & then used in Leaching & purification plant.In the production of Zn dust following type’s steps is followed.
First of all Zinc maggots are melted in an oil furnace, from which melted Zinc is taken into Electro Furnace to vapourise the Zinc. For this purpose coke is used between two graphite electrodes. This Vapour is allowed to pass through a condenser or where it is cooled by Nitrogen Gas. After cooling the Vapour is changed in the form of dust Known as “ZINC DUST”.
ELECTRICAL DEPARTMENT:-
Power situation in any industry is alarming. The gap between demand and supply keeps widening day by day. The energy SBU thus determines how each business unit or process consumes power. This helps to promote accountability, increase efficiency and productivity. Electrical energy acts as a raw material for industry. It implies energy saving through various ways after all energy saved is energy generated.
CONCLUSION
The 30 days training stint at HZL proved to be a fruitful and learning experience as it provided an opportunity for me to work in a rapidly developing organization striving for excellence in its operations and services.
The Project team, with whom I worked in my time spent here, not only cleared my basic knowledge but also explained the systematic and efficient manner in which they carry out their day to day operations for achieving customer satisfaction. The hierarchy at HZL insures that there is accountability and transparency in the system and the projects undertaken are completed on or before time.