System solution -Direct Reduced Iron with Rotary Hearth Furnace (RHF)

Direct reduced iron with Rotary hearth furnace (RHF)
Basic introduction

The RHF process belongs to the coal-based direct reduction iron process and can be used to treat various iron-containing materials, such as (Magnetite, hematite, limonite) concentrate powder, metallurgical dust residue, -5mm oxidized pellets, DRI sludge, Mill scale, etc.

It mainly consists of the following areas

■ Dosing Area
■ Raw material Briquetting and drying Area
■ RHF Area
■ Cooling area
■ Water treatment system
■ Exhaust gas management system
■Automated control system
For the RHF system, metalized pellets with a MFe content of at least 80% can generally be obtained. If it is necessary to further increase the MFe content to above 90%, the following areas will be required for additional processing.
■Magnetic separation and CBI system

Advantages and Disadvantages of the RHF Process

Advantages
■The process is simple, with a short production line
■Fast direct reduction speed
■Low investment.
■High degree of automation, environmentally friendly.
■The key point is: it can handle materials that are difficult to pellet, such as -5mm oxidized pellets, Mill scale etc.

Disadvantages
The relatively low content of MFe in the product

Capacity of a single production line

Based on the raw materials :
100000ton/year ; 200000ton/year ; 300000ton/year ;
Based on the Finished product
≈60000ton/year ; ≈120000ton/year ; ≈180000ton/year

Project implementation process

Steps	Content	Implementing
1	Laboratory research and feasibility report The shortest period:60 days	Entrust the implementation to the university Users can directly enter into contracts with the universities that have signed cooperation agreements with our company.
2	Engineering design stage The shortest period: 75days	Carried out by our company Provide： • P&I diagrams for water, nitrogen, hydraulic, and gas media • The PFS Drawing of each Areas • TOP Drawing • The General layout and the layout for each area • BD Drawing each Each device • BE Drawing • Electrical system network diagram • Electrical system single-line diagram • List of Motors and Instruments Note: The civil engineering part was entrusted to qualified design units for implementation. Alternatively, the user can select the implementation unit based on the BD diagram provided by our company.
3	Design review	Carried out jointly by the user and our company
4	Equipment ordering The shortest period: 210 days	Overall, it will be implemented by our company. Among them: The feeding equipment for RHF and the high-temperature flue gas treatment system will be contracted out to other companies for implementation.
5	The civil engineering sections such as the factory buildings and equipment foundations	Carried out by the user
6	Equipment acceptance inspection The shortest period: 30 days	Carried out by the user
7	Equipment installation and commissioning The shortest period: 180 days	Implementation entity: User Our company will dispatch personnel to provide technical services.
8	Trial production and delivery The shortest period: 90 days	Carried out jointly by the user and our company

Where there is briquette, mixing, drying,
and system solution related,there is Kaizheng