CISDI’s patented rotary hearth furnace set to solve problems for Jingtang

CISDI is supplying its revolutionary eco-friendly rotary hearth furnace to solve zinc waste problems at Shougang Jingtang United Iron & Steel.

Based at the Tangshan Caofeidian Industrial Zone in China’s Hebei Province, the plant’s current furnace, which has an output of 300,000 tonnes, treats zinc-bearing solid waste and has a 150,000-tonne homogenising line.

Jingtang urgently needs to build a replacement so it can turn its waste into resources.

Environmental regulations which came into force in 2018 now prevent the sale of zinc-bearing solid waste. And because of the composition of its stock materials, Jiangtang’s zinc load far exceeds the trade’s average.

CISDI Thermal & Environmental Engineering’s rotary hearth furnace has been awarded over 30 patents and six project references.

Iron, zinc and carbon solid wastes can be treated and transformed into resources. Its design solves the industry’s chronic problem of solid waste treatment and the difficulties of achieving a zero discharge of iron-bearing dusts.

An open-loop recycling system for treating zinc waste will be created, with a zero-discharge and zero-landing target.

CISDI Thermal won the Engineering, Procurement and Construction contract thanks to its success at Yanshan Steel and Baowu Zhanjiang, where CISDI-designed and supplied fast ramp-up RHFs are giving optimal production results and world-leading indicators of over 85 per cent of the final de-zincification ratio.

CISDI Thermal is already developing other core equipment in line with the furnace’s complex technology.

Baowu Zhanjiang’s solid waste system is China’s first metallurgical solid waste treatment and waste-to-energy centre. Built by rotary furnace hearth experts at CISDI Thermal, the patented technology solved the steelwork’s iron-bearing dust treatment issue and achieved dust recycling throughout the plant