CISDI’s rotary hearth furnace is cleaning up the steel sector

CISDI’s rotary hearth furnace recycles 100 per cent of a steel plant’s iron-bearing dusts and sludges and converts them to resources.

The RHF is now a leading product for achieving clean, green steel production and more efficient use of resources.

The 14 operational RHFs built by CISDI account for around 80 per cent of the Chinese market.

They bring about the following results each year:

ü  up to 3.30 million tonnes of zinc-bearing dusts and sludges with a high content of iron recycled

ü  waste recycled into 2 million tonnes of iron products and around 100,000 tonnes of zinc products

ü  over USD 147,000,000 economic returns are gained.

Star projects:

The rotary hearth furnace at Xinyu Steel in China’s Jiangxi Province, which has an annual production capacity of 250,000 tonnes

Xinyu Steel had been experiencing difficulties in piling its iron and zinc-bearing dusts and sludges.

Dusts and sludges were returning into main production procedures, causing operational and environmental problems.

CISDI’s RHF has enabled the plant to achieve zero discharge of its solid wastes and produce 162,000 tonnes of direct reduction iron, 13,000 tonnes of zinc hypoxide powders and 164,000 tonnes of steam for power generation - creating around USD 23,570,000 of economic benefits a year.

The twin rotary hearth furnaces at Baosteel WISCO in China’s Hubei Province, each with an annual production capacity of 200,000 tonnes

All iron and zinc-bearing dusts and sludges are recycled at WISCO and amount to around 390,000 tonnes in dry basis. These valuable resources are reutilised, achieving an outstanding demo for zero discharge of iron-bearing solid waste.