By K. Ishii
With a purpose to decrease the price of operating blast furnaces (BFs), injected pulverized coal is used instead of coke to fireplace BFs. due to this, unburned nice fabrics are blown with the fuel into the bosh and useless guy components with attainable unsafe results on gasoline circulation and permeability of the coke column. The skill of the furnace to devour those debris by means of resolution loss is perhaps one of many boundaries to coal injection. it's, as a result, vital to appreciate the physicochemical and aerodynamic behaviour of fines together with the swap of in-furnace phenomena.
The Committee of Pulverized Coal Combustion and In-Furnace response in BF used to be manage in 1993 as a cooperative study of the Japan Society for the merchandising of technological know-how (JSPS) and the Iron and metal Institute (ISIJ) to guage examine initiative into this challenge.
This e-book studies at the JSPS/ISIJ Committee's actions and describes the translation of findings drawn from combustion experiments and the result of dwell furnace functions, and furnace functionality.
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Additional info for Advanced Pulverized Coal Injection Technology and Blast Furnace Operation
Translucent in transmitted light - whitishyellow, yellow, golden yellow or red. Black, dark grey to light grey in reflected light. Coalified resins or other plant secretions or exudates. Translucent in transmitted light - whitishyellow, yellow, golden yellow or red. Black, dark grey to light grey in reflected light. Characteristics essentially those of fusinite (Stopes-Heerlen system). Characteristics essentially those of semifusinite (Stopes-Heerlen System). Characteristics essentially those of micrinite (Stopes-Heerlen System).
Characteristics essentially those of semifusinite (Stopes-Heerlen System). Characteristics essentially those of micrinite (Stopes-Heerlen System). v4-v24 Eo- Eis RO-RIS c c -- rrlo-rlw SF2-SF39 Mz-Men 22 2. CHARACTERISTICS OF PULVERIZED COAL COMBUSTION under reducing conditions. Sometimes, limits on the elemental composition of the ash are also included, particularly in terms of sodium content. v) Results from a standard grindability test (Hardgrove) are used to indicate possible problems in pulverizing a coal consignment.
3-7 Temperature change of combustion flame measured by high-speed two-color pyrometer efficiency increases much slower and in a similar manner for both cases. The effect of the injection rate is not clear in either case. The effect of the number of lances, double or single, is most noticeable in the range of 300 to 600 mm from the lance. 5 ms). Then, it is considered that the observed temperature indicates temperature of the luminous flame observed in Figs. 3-3 and 3-4. For the double lance, the temperature reaches about 2100°C almost instantaneously at a point 300 mm from the lances, while for the single lance, the temperature rises slower and attains the maximum at a point 600 mm from the lance.
Advanced Pulverized Coal Injection Technology and Blast Furnace Operation by K. Ishii