The pellet engineering technology is the major core technology of CIE absorbed in research and development of large scale pellet technologies. CIE has seen its core technologies of shaft furnace, travelling grate indurating furnace and grate-kiln projects. Especially over the past ten years, the grate kiln engineering technology is in the leading position domestically, and the types of ores applied in the engineering technologies involve magnetite, vanadium-titanium magnetite, hematite, limonite and pyrite cinder. CIE boasts its design and EPC capability for constructing pellet plants from 1.2 million ton to 6 million ton.

 

Alkaline pellet production technologies

 

◎ CIE develops the basic pellet technology to improve the alkaline pellet burden structure because acid pellet is produced mainly in pellet plant at present.

◎Roasting and heating pattern optimization technology of alkaline pellets

◎Grinding process and equipment technology of alkaline additives

◎Single grinding and mix grinding technology of all kinds of additives

 

Oxidized pellet technology of hematite

 

◎Using all-hematite or high proportion hematite as the major raw materials

◎Using internal carbon technology to reduce temperature difference in pellets and improve pellet roasting performance

◎Fine grinding technologies of different iron-bearing raw materials for researching adaptation and economy of different grinding process to different raw materials

 

Oxidized pellet technology of pyrite residue

 

◎ Using high proportion pyrite residue as the main raw materials for preparation of oxidized pellet

◎ Using high pressure roller grinding & side material circulation technology to activate material surface properties and solve the problem of bad balling performance of pyrite residue

◎Using material prewetting-ageing technology to improve the hydrophilicity of pyrite residue

◎Using product desulphurization and flue gas desulphurization technology to reduce product residue and SO2 emission

 

Key technologies of pellet equipment

 

(I)Key technologies of travelling grate: 

◎Double-side all-hanging two-point engagement flexible drive technology

◎Toothed plate and chain link technology improve the service life of toothed plate of main shaft substantially

◎New type of grate plate technology solves the problem of burning loss in high temperature condition

◎Pellet leakage prevention technology reduces the pellet leakage rate significantly

(II)Key technologies of rotary kiln 

◎The flexible drive technology of rotary kiln helps to maintain stable running and reduce the tooth surface wear with longer service life.

◎Leaf seal technology is developed to improve the sealing effect and prolong the service life

(III)Key technologies of ring cooling machine

◎New type of pallet car and rotary frame technology

◎Ring cooling machine shaft end supporting technology

◎Fabricated pallet technology

◎Technology of water sealing between side plate of pallet and hood of ring cooling machine

(IV)Automatic control technology of pellet

(V)Direct reduction technology of metalized pellet

Zhuhai Yujia 1.2 million t/a pellet EPC engineering

Tongling 1.2 million t/a sulfuric acid dregs pellet industrialization production demonstration engineering in Anhui Province 

Xingcheng Special Steel 1.2 million t/a pellet EP EPC engineering in Jiangyin Province 

Kunsteel 1.2 million t/a pellet engineering design 

Wusteel 5 million t/a pellet engineering 

Wusteel Chengchao iron mine pellet engineering 

Fuyun 150,000 t/a direct reduction EP engineering in Xinjiang Province 

Miyun direct reduction engineering in Beijing 

Kazuo sponge iron smelting engineering in Liaoning Province