Study on a New Technology of Flue Gas Desulfurization in Sintering Process

Abstract:

In this paper, a new technology of sintering flue gas desulfurization is proposed. The principle is that some kind of additives is introduced into feed mix, the additives decompose into NH₃ in sintering process during heating, the NH₃ reacts with SO₂ gas to form ammonium sulphate solid particles, the particles are captured as dust by ESP, so the removal of SO₂ in sintering flue gas is achieved. The study results show that the concentration of SO₂ in sintering flue gas decreases gradually with the increase of additive amount, when the specific quantity of additive is 3.02kg per ton mix, the decreasing rate of SO₂ is up to 81.33%(mass). Since sintering dust must be recycled as raw materials, in order to solve the problem of flue gas SO₂ concentration is gradually increasing, the approach of increasing the amount of additive can be taken, or the dust is separately treated for sulfur removal before being used as raw sintering material. The new approach of reducing SO₂ emission in sintering flue gas has advantages of low investment, small occupation area and low operation cost. Moreover, the additive is inexpensive and readily available, so sintering cost is not increased obviously.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 2284-2290
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.2284
• Online since: August 2013
• Authors: Su Ping Wang*, Xue Gong Bi, De Ming Weng
• Keywords: Additive, Sintering Flue Gas, Sintering Process, SO₂ Emission

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