Product Brief
High-temperature pressure leaching system
The high-pressure acid leaching system and patented product that are interdependently researched and developed by ENFI consists of key equipment such as multi-tube heat exchanger (preheater), autoclave, flash vessel, tail gas scrubbing system, multi-medium mixing nozzle, nuclear level gauge casing, acid lance, thickener and agitation equipment. Widely applicable in metallurgical projects including pressure acid leaching of nickel laterite, pressure oxidative leaching of sulfide concentrate (zinc, copper, cobalt, nickel, molybdenum, etc.), pressure pre-oxidation of refractory gold concentrate, iron removal of iron-bearing solution using hematite, copper anode slime treatment and aluminum oxide processing, etc.
Specification & Series：Customizable to features and process flow of the process medium, transportation conditions and client requirements.
- Processing Capacity：Subject to specific conditions of a project.
- Application Fields：The high-pressure acid leaching system widely applicable in metallurgical projects including high pressure acid leaching of nickel laterite ore, pressurized oxygen leaching of sulfide ore (zinc, copper, cobalt, nickel, molybdenum, etc.), pressurized pretreatment of refractory gold concentrate, iron removal of hematite, anode slime treatment and aluminum oxide processing.
SERVICE CALL+86 13521339794 
Price Inquiry
Online Remarks
enfi.cemsa@gmail.com
Advantages & Features
- The system can be used for processing resources of complex composition and low grade, quick and effective leaching of valuable metals from raw materials to achieve a leaching rate that is difficult to obtain under atmospheric pressure. Characterized by low energy consumption and environmental friendliness, the system can also be used for comprehensive recovery of valuable metals from the resources and slag recycling. This technology is a green, environmental protection and low carbon emission technology.
- The whole system has reached or exceeded the rated efficiency, and performs well even in the slurry system with severe uneven scaling conditions or under severe abrasion condition, ensuring a safe, long-term and stable operation of the plants, saving the operating expenses of the customers by a large amount.
Working Principle
High pressure acid leaching of nickel laterite includes slurry storage, slurry thickening, high pressure acid leaching, recycled leaching and neutralization as well as other systems.
Technical Parameters
| Name | Parameter |
|---|---|
| Autoclave material | Subject to temperature, acid or alkali, oxygen, hydrogen ion content and other process conditions as well as investment and operation cost, commonly used materials include carbon steel, stainless steel, titanium alloy, steel lined with lead bricks, steel lined with membrane bricks, steel titanium composite plate, etc. |
| Autoclave inner lining bricks | Mainly subject to shell deformation, orifice size and layout, internal structure, cooling and heating measures, brick bibulous rate, thermal expansion rate and coefficient of thermal conductivity, etc. The selection of mortar is mainly subject to chemical properties, elastic modulus, service life and the requirements on acidification. Material selection of isolation layer is mainly determined by tolerant temperature, bond strength, oxidation temperature, decomposition temperature, combustion temperature, maintainability, etc. |
| Alloy autoclave | Mainly 904L super austenitic stainless steel, double phase stainless steel, super double phase stainless steel, titanium materials, etc. |
| Wear-resistant coating | Mainly titanium oxide, zirconia ceramic coating, etc. |
| Types of agitator blade | Mainly paddle, propeller, turbine, etc. |
| Thickener material | Steel shell lined with rubber bricks, concrete lined with FRP bricks. |
| Agitation equipment material | Steel shell lined with rubber bricks, concrete lined with FRP bricks. |
| Storage tank types | Round tank, square tank |
| Nuclear level gauge casing material | Duplex stainless steel as inner casing, lead for the middle protective layer and titanium as outer shield. |
| Multi-medium mixture nozzle material | Duplex stainless steel as the inner tube, PTFE as the middle layer and titanium as the outer tube. |
| Multi-tube heat exchanger material | The tube plate and tube bundle are made of duplex stainless steel 2507 and the shell side is made of 316L. |
The Application Achievements
Nickel laterite hydrometallurgical project
Huayou Cobalt Project in Quzhou, Zhejiang Province
Shuiyindong Gold Mine Project of Guizhou Zijin
Copper Anode Slime Project of Zhongyuan Smelter
Hualian Zn-In Metallurgical Technology Upgrade Project
Related Recommendations
Online Message
Online Message
For the purpose that your message can be handled in time, please fill in your correct telephone number!