Bell-less top multi-ring matrix distribution center coke charging method of blast furnace
A cloth and blast furnace technology, applied to blast furnaces, blast furnace details, blast furnace parts, etc., can solve the problems of easy collapsing of coke layers, unstable furnace conditions, and difficulty in ensuring the stability of central gas, and achieve the goal of reducing production costs and stabilizing the edge Effect
Active Publication Date: 2012-08-01
SHOUGANG CORPORATION
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Problems solved by technology
[0008] However, in the aforementioned method of coking in the center of multi-ring matrix distribution on the top of the bellless furnace, because the material surface is funnel-shaped, it is easy to collapse the coke layer when distributing ore, and a mixed layer of material surface is formed near the center.
In the case of fluctuating coke quality, it is not easy to ensure the stability of central gas, and if necessary adjustment measures are not taken, it is easy to cause instability of furnace conditions
Method used
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Embodiment
[0019] Embodiment (Germany AMEH factory 5A blast furnace (furnace capacity 2032 stands))
[0020] The 5A blast furnace is equipped with a set of Paul Wurth ring-shaped bellless furnace roof distribution system (the capacity of the receiving hopper is 24m 3 , silo capacity 36m 3 ) (using a water-cooled gearbox and a 3.5m long cloth chute).
[0021] Sintered ore is screened and divided into three particle sizes: >8mm, 4-8mm and <4mm. Sinters of the first two grain sizes are fed into the blast furnace.
[0022] Coke is divided into three particle sizes of >38mm, 10-38mm and <10mm. Cokes of the first two sizes are fed directly into the blast furnace.
[0023] The charge used is sinter, pellets and lump ore (the ratio is about 80% / 90% / 11%). Sintered ore includes small-grained sintered ore. The reducing agent is coke and coal powder.
[0024] Table 1 is the standard charging information of 5A blast furnace. figure 1 It is the effect drawing of standard charging of 5A blast f...
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Abstract
The invention relates to a bell-less top multi-ring matrix burden distribution central coke charging method of a blast furnace, which belongs to the technical field of blast furnace burden distribution. The method comprises the following steps of: on the basis of a multi-ring matrix burden distribution method, firstly, distributing more than 50 percent of coke amount in the central area of a furnace throat so that the thickness of central coke is greater than that of edge coke and the burden surface of the furnace throat forms a steamed bread shape; removing a central mixture layer of the furnace throat to accurately control radial ore to coke ratio because the center of the burden surface is high while the edge is low. The invention has the advantages of being adapted to the fluctuation of coke quality, facilitating the use of ore with ultra-small size fraction, maintaining steady and smooth furnace conditions and realizing the aim of opening the center, stabilizing the edge so as toreduce production cost. The furnace top thermal imaging edge temperature is 120+ / -50 DEG C, and the center temperature is 450+ / -150 DEG C.
Description
technical field [0001] The invention belongs to the technical field of blast furnace material distribution, in particular to a coking method for the center of multi-ring matrix material distribution on a bellless top of a blast furnace. Background technique [0002] Blast furnace distribution refers to the reasonable selection and distribution of the charging sequence, loading method, rotating chute α angle, material line and batch weight when the charging is loaded into the furnace. The principle of the blast furnace material distribution method is to ensure the reasonable distribution of gas, improve the utilization rate of gas, and ensure the smooth operation of the blast furnace. Blast furnace material plays a key role in the stable operation of the blast furnace and the utilization of gas, that is, it plays a decisive role in the technical and economic indicators of the blast furnace - output and coke ratio. [0003] Bellless stove top cloth has gained certain experien...
Claims
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IPC IPC(8): C21B7/00
Inventor 竺维春齐树森王冬青
Owner SHOUGANG CORPORATION