Beijing JJRS Technology Development Co., Ltd. |
Reference project 2x6.0m3/h Acid Regeneration Plant
Beijing JJRS Technology Development Co., Ltd. registered in national high tech park-Beijing Economic and Technological Development Zone, is high-tech enterprise specialized in the complete set of metallurgical equipments, intensive processing of steel strip and metal surface coating engineering project, with the integration of mechanism, optics, electric and hydraulic pressure.
JJRS is professional on turn-key projects, from general planning, designing, to manufacturing, installing, commissioning and servicing. Besides, our business also covers single equipment’s designing, manufacturing and installing, as well as electric transmission, control system and spare parts. All basing on these supporting businesses, we mark out a developing strategy that taking metal strip intensive processing and color coating production lines as main, and the associated industry products as supplement.
When hot rolled steel strip is pickledby hydrochloric acid, iron
and iron oxide on surface of hot-rolled steel strip shall have
chemical reaction with hydrochloric acid and then transform into
chloride majored by FeCL2 and dissolve into hydrochloric acid
solution. Along with acid pickling proceeding, iron ion density in
hydrochloric acid solution will go up, while dissociated HCL
density will go down. In order to maintain the density of free HCL
in the acid solution, remove the iron ion increased, the waste acid
pickling solution will be sent to acid regeneration plant to
regenerate free acid which shall be returned into acid pickling
unit for waste acid reutilization. At the same time, iron oxide
powder is obtained.
The acid pickling process is expressed as the following chemical
reaction equations.
Fe+2HCL=FeCL2+H2
FeO+2HCL=FeCL2+H2O
Fe2O3+2HCL FeCL2+FeCL3+H2O
Fe2O3+6HCL=2FeCL3+3H2O
2FeCL3+Fe=3FeCL2
4FeCL2B+4HCL+O2=4FeCL3+2H2O
Quality grade standards description | High-quality fresh HCL solution | First class fresh HCL solution | Qualified fresh HCL solution |
Total acid content percentage %(HCL)≥ | 31.0 | 31.0 | 31.0 |
Iron %≤ | 0.006 | 0.008 | 0.01 |
Sulfate %(SO42-)≤ | 0.005 | 0.03 | |
Arsenic%≤ | 0.0001 | 0.0001 | 0.0001 |
Cauterant residual %≤ | 0.08 | 0.1 | 0.15 |
Chloride %≤ | 0.005 | 0.008 | 0.010 |