METHOD OF CHARGING SINTERING RAW MATERIAL

PURPOSE:To allow the use of a hardly sinterable iron ore and to reduce the production cost of the sintered ore by depositing raw materials for the sintered ore through a bar-shaped slant sieve so as to attain a specific grain size distribution in the thickness direction on the pallet of a sintering...

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Bibliographic Details
Main Authors FUJIMOTO MASAMI, UMETSU YOSHINORI, HIDA YUKIHIRO, INASUMI TADAHIRO
Format Patent
LanguageEnglish
Published 27.02.1990
Subjects
BLASTING
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
FURNACES
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
HEATING
KILNS
LIGHTING
MECHANICAL ENGINEERING
METALLURGY
OPEN SINTERING OR LIKE APPARATUS
OVENS
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
RETORTS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WEAPONS
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Summary:PURPOSE:To allow the use of a hardly sinterable iron ore and to reduce the production cost of the sintered ore by depositing raw materials for the sintered ore through a bar-shaped slant sieve so as to attain a specific grain size distribution in the thickness direction on the pallet of a sintering device at the time of producing the sintered ore for a blast furnace. CONSTITUTION:Quick lime is added to the powder of the iron ore which is not adequate as the raw material for the sintered ore such as easily metalble iron ore and hardly sinterable iron ore contg. SiO2 at a lower ratio and a carbonaceous material is added at need to form relatively rough minipellets 9 of 6-13mm grain size. The raw materials prepd. by adding and mixing auxiliary raw materials such as easily sinterable iron ore, returns of the sintered ore, carbonaceous material, and CaO to and with these pellets are put into a surge hopper 1. The powder raw material mixture is classified to fine grains 4a and coarse grains 4b by the primary sieve 3 arrayed obliquely with steel bars, etc. The grains are again classified by the bar-shaped secondary sieves 6a, 6b and are charged onto the pallet 7 of the sintering device so as to have the grain sizes gradually smaller from the lower layers to the upper layers to form a raw material packed layer 8. The front surface of the packed layer 8 is ignited by an ignition furnace 10 to sinter the raw materials. The use of the inexpensive sintering raw materials is possible and the cost of the sintered ore is reduced.
Bibliography:Application Number: JP19880210378