The treatment process of regenerated zinc in China is divided into two methods: fire separation method and wet method. Wherein the high zinc content of the waste processing method of metal materials having a reducing heteroaryl distillation, wet, liquation melting aluminum method. The treatment of zinc dust with low zinc content, such as rotary kiln, flat kiln and other processes, first produces zinc oxide, and zinc ingots can be obtained directly. 1. Treatment of waste materials with high zinc content The distillation method and the wet method are currently used for the recovery process of zinc slag, zinc ash, etc., which have a high zinc content, and zinc ingots can be obtained directly. (1) Treatment of zinc-rich waste by horizontal tank distillation This method is relatively simple in production process, does not require a lot of electromechanical equipment, has less capital investment and lower cost. It is still used by some small-scale regenerative zinc smelters in China to process zinc-rich waste, such as hot-dip galvanized ash, zinc slag and coarse Zinc ingots, scraps, etc. When the raw material for zinc smelting in the horizontal tank is zinc slag, the zinc recovery rate is 80%-85%, and if it is zinc ash, it is only 40%-60%. The zinc obtained from the horizontal tank zinc smelting is not high, generally only reach No. 4 or No. 5 zinc, even the outer zinc. In order to obtain high quality regenerated zinc, it needs to be rectified and refined. (2) Vacuum distillation The principle of this method is to use zinc vapor and other metals in the zinc slag to achieve the purpose of separating zinc and impurities. The method can only deal with hot-dip galvanizing slag, which has the advantages of higher evaporation rate and higher metal recovery rate at lower temperature, selective recovery of components in the material, and avoidance of oxidation and product. Other pollution, the purity can reach 99.8% ~ 99.9%, the recovery rate can reach more than 85%. The unvaporized zinc in the slag can be returned to the distillation after simple sorting, so the total recovery rate can reach over 98%, and the equipment is simple, the operation is simple, and the processing cost is lower than the conventional flat tank regeneration process. However, the equipment investment of this law is large, and the promotion is limited. It is used in some large galvanized steel plants. (3) Wet process The wet process can be divided into two processes: soluble anode electrolysis and leaching-purification-electrodeposition. The soluble anodic electrolysis process is suitable for treating zinc slag, while the leaching-purification-electrodeposition process is suitable for treating zinc ash. Both processes use an aqueous solution of sulfuric acid and zinc sulfate as the electrolyte. In the zinc smelting industry, wet zinc smelting is the main technical development direction. The advantage of the wet process is that the zinc recovery rate is high, about 20% higher than the traditional fire method, which is convenient for mechanization, automation, process wastewater, Less waste residue and less environmental pollution. Second, the treatment of zinc dust in steel plants Industrial sectional High Speed Overhead Door overhead sectional door , sliding door , industrial overhead door,automatic industrial doors , industrial sectional door,industrial sectional overhead door SHENZHEN HONGFA AUTOMATIC DOOR CO., LTD , http://www.hongfarrd.com
Product Description
Product Description:
Name
Sectional overhead glass panel garage door
Operation way
electric /remote/manual
Position
garage/shop/auto4S store/Industrial/Garden etc.
Door panel structure
aluminum alloy frame +Tempered Glass / Polycarbonate Glass
/double-glazing
Door panel frame
material
aluminum alloy
thickness
2.0mm
color
white, black ,gray, silver gray, wood grain, cream
(any colours can be specified)
surface Treating
baking varnish
Thickness of door
panel
40mm/50mm
Core of the door
panel
Tempered Glass
5.0`6.0mm thickness ,Full view clear or frosted
Polycarbonate
Glass
5.0mm ~10mm thickness ,Full view clear or frosted
aluminium sheet
9.0mm in thickness,baking varnish with surface
traeting,color like the frame
other tempered
Glass
mirror glass,baking glass and many kind of glass
for your options
choose your glass:
The glass can be use polycarbonate glass( clear or frosted )
and tempered glass (clear or frosted/coated colour /tinted color/mirrow)
5-10mm thickness for glass
>>Tempered Glass - enhanced safety
>>Polycarbonate - superior strength with UV protection
hardware Accessories
Guide rail
Size
2"/3"
Materail
galvanized steel
Thickness
2.0mm
Bracket
Materail
galvanized steel
Thickness
3.0mm
Hinge
Model
Finger-protect/normal
Materail
galvanized steel
Thickness
3.0mm
Roller
Size
2"/3"
Materail
galvanized steel/Nylon
shaft
Model
solid/hollow
Materail
galvanized steel
External key lock
For independent garage door, this sort of lock allows you to use external key to start the clutch deviceand open the door in case of power failure under the condition that there are no entries or side doors.
Box airbag safety system
The door will be automatically to rise If there are any obstacles in the
process of downward
Spring break device
When the spring is broken,the door can auto stop to prevent the door
falling down
Cable break safety system
Once the cable is broken ,this device will blocked on the guide rails in case of breakage of the steel wire prevent the door falling down
V external reinforcing bars
helping to enhance the strength of door panels,1.0mm thickness,
80mm height, with the bars the door can against the Hurricane
Main process of recycled zinc recovery
Electric Overhead Sliding Door For Logistic