T/CI 170-2022 1000mm ultra-thick material layer energy-saving and low-carbon sintering technology specifications

Scope

Scope: This document specifies the general technical requirements for energy-saving and low-carbon sintering technology of ultra-thick material layers, including technical terms and definitions, principles, and process requirements. This document is applicable to the sintering process in the steel metallurgy field. Main technical content: 4.1 Sintering Mixing Technology 4.1.1 This standard provides a sintering mix for ultra-thick material layers with low carbon emissions, which includes the following components by weight: - 90–110 parts of sinter-ready iron ore powder; - 14–20 parts of returned ore A; - 8.4–10.4 parts of returned ore B; - 2–4 parts of coke powder; - 7–9 parts of quicklime; - 6.4–8.4 parts of binder. 4.1.2 The particle size of returned ore A is 1–2 mm, and the particle size of returned ore B is 2.4–4 mm. 4.1.3 The binder for the sintering mix with ultra-thick material layers and low carbon emissions is an organic polymer compound, and the aqueous solution of the binder with a concentration of 3–8% is used. 4.1.4 The particle size of the sinter-ready iron ore powder should be less than 3 mm, with more than 80% of the particles smaller than 1 mm. 4.1.5 The particle size of coke powder should be less than 1 mm, and the particle size of quicklime should be less than 1 mm. 4.1.6 Mix the sinter-ready iron ore powder with returned ore A of 1–2 mm in size once, then add coke powder and quicklime for a second mixing. 4.1.7 Add binder and returned ore B of 2.4–4 mm in size for a third mixing to obtain the mixed material. Heat the sintering mix with ultra-thick material layers and low carbon emissions with steam at a temperature of 80–110 °C. 4.1.8 The mixing time for the first stage of the sintering mix with ultra-thick material layers and low carbon emissions is 3–6 minutes. The mixing time for the second stage is 2–4 minutes, and the mixing time for the third stage is 3–4 minutes. 4.1.9 Control the material temperature

Development Information

Related Standards