ENFI WHB for Smelting, Waste Heat Recovery Boiler

Product Brief

WHB for smelting

Having the experience of designing and operating over 2000 WHBs, ENFI has the leading WHB technologies in the world. After technological development and improvement for more than 50 years, the core expertise owned by ENFI has been formed with over 20 proprietary and patented technologies of ENFI’ own in structural design, forced circulation, thermal calculation, control system, dust removal equipment and other key technologies capable of effectively improving energy efficiency and providing significant upgrades in energy saving, emission reduction and environmental protection.

Processing Capacity：Maximum steam output of single unit: 150t/h; maximum steam parameters: 6MPa, 400°C;
Applicable for 1 million t/a top blown nickel smelting furnace and 400kt/a copper flash furnace to its largest capacity.
Application Fields：The WHB can be adopted in smelting process of lead, zinc, copper, nickel and tin, compatible with bottom blowing furnace, reduction furnace, side blowing furnace, rotary kiln, boiling roasting furnace, blast furnace, reflection furnace, electric furnace, flash furnace, fuming furnace, coking furnace, rotary furnace, AUSMELT furnace and other furnaces.

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Advantages & Features

Full-time constant pressure regulating technology and mixed water recycling technology are applied to effectively eliminate corrosion caused by flue gas, smoke dust depositing and slagging, corrosion and wear. It also adapts to the frequent fluctuation of smelting process load.
The WHB has the advantages of wide application range, supporting multiple furnace types, high reliability and good economic benefits.

Technical Parameters

Type of metallurgical furnaces	Dozens of types including bottom-blowing furnace, top-blowing furnace, roasting furnace, flash furnace, etc.
Rated steam amount of the boiler	8.5-150t/h
Rated steam pressure of the boiler	2.5-6.0MPa
Rated steam temperature of the boiler	226-400°C
Water feed temperature of the boiler	104-130°C
Exhaust gas temperature of boiler	220-380°C
Off-gas at the boiler inlet	700-1650°C
Design thermal efficiency	81-83%
Water circulating mode	Forced circulation and natural circulation

The Application Achievements

ENFI has completed more than 100 projects of WHB design for nonferrous metallurgy, and has undertaken more than 40 projects as the main contractor for WHB, including the world's first WHB for oxygen-enriched air top-blowing nickel smelting furnace with the largest evaporation (capacity 1million t/a, evaporation160t/h) and the first WHB for copper flash furnace with the largest evaporation (capacity 400k t/a, evaporation116t/h). ENFI has provided excellent service for clients such as Jianchuan Group Co.,Ltd, Baiyin Nonferrous Group Co.,Ltd, Daye Nonferrous Metals Group Holdings Co., Ltd, Jiangxi Copper Corporation Limited, China Yun Copper (Group) Co., Ltd, Yunnan Tin Group (Holding) Company Limited, JIEN NICKEL, China Nonferrous Metal Mining(Group) Co., Ltd among others, and has introduced WHBs to more than 10 countries including India, Pakistan, Zambia, Congo, Myanmar, Vietnam, Papua New Guinea and so on.