JPS63100113A - Bell-less charging apparatus in blast furnace - Google Patents

Abstract

PURPOSE:To optically charge multiple kinds of ore, coke, etc., corresponding to the purpose in a bell-less charging apparatus of blast furnace by arranging three pieces or more of hoppers to be possible to supply optically raw materials in the blast furnace at the top side of furnace. CONSTITUTION:In case of charging under mixing multiple kinds of ore, coke, etc., the ore is stored in the hopper 12 and the coke in the hopper 13 and coke having different characteristic from the coke in the hopper 13, ore, sintered ore, lime stone or silica rock, etc., is stored in the hopper 14. And, by opening the hoppers 13 and 14 at the same time, the raw material in the hopper 14 in the coke is mixed. And, by opening the hoppers 12 and 14 at the same time the raw material in the hopper 14 in the core is charged under mixing condition. Further, the fine particle kind of ore in the hopper 12 and the coase particle kind of ore in the hopper 13 and the coke in the hopper 14 are charged respectively and at the same time of charging the ore in the furnace and at the peripheral part of the furnace, the hopper 12 is opened and at the center part of the furnace, the hopper 13 is opened and so distribution of the ore having difference between peripheral part and the center part is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a bellless charging device for a blast furnace that is capable of controlling the distribution of raw material charges into the furnace.

(Prior Art) The radial distribution of the core thickness and grain size of the coke and ores charged into the furnace determines the ventilation resistance distribution of the charging layer m, which determines the radial distribution of the gas flow. For this reason, controlling the distribution of raw materials is important for blast furnace operation.

A bellless charging device is generally equipped with a coke hopper and an iron ore hopper above a blast furnace, and each raw material is charged from a rotating chute. Furthermore, as an improved version of this device, a device has been proposed in which two hoppers are arranged coaxially and perpendicularly to improve circumferential balance control.

However, because conventional bellless charging equipment has two hoppers, it is difficult to arbitrarily charge various brands of ore, coke, etc., and even if it is done, it takes a long time to charge, and the production capacity is inhibit. Furthermore, it is not possible to arbitrarily charge multiple brands of ore and coke in the radial direction of the blast furnace.

(Technical Problems to be Solved by the Invention) The present invention enables the charging of various brands of ore, coke, etc. to be arbitrarily charged according to the purpose, and the charging material and gas flow rate distribution in the blast furnace to be adjusted to the desired value. The purpose of the present invention is to provide a bellless charging device for a blast furnace.

(Means for Solving the Technical Problem) The present invention is a bellless charging device for a blast furnace, which is provided with at least three hoppers at the top of the blast furnace that can quickly supply raw materials into the blast furnace. All of the raw material charging devices of the hopper installed above can discharge υ that can be charged into the furnace at the same time.
1111 device is equipped.

(Detailed Description of the Invention) FIG. 1 shows a bellless charging device for a blast furnace. This device has three hoppers 12, 13 and 14 above the blast furnace body 11.
is attached. An opening/closing plate 15 is attached to each raw material supply port of each hopper, and these opening/closing plates can be opened and closed as desired.

On the other hand, a rotating chute 16 is attached to the upper part of the furnace body corresponding to the lower part of the hopper, and is used to sequentially charge raw materials into the furnace while changing the rotation angle during the rotation.

However, according to the bellless charging device, there are three hoppers and the discharge control section can be controlled independently, so it is possible to mix and charge various brands of ore, coke, etc., and to charge these raw materials in the radial direction of the blast furnace. can be arbitrarily distributed. For example, when performing mixed charging, ore is placed in the hopper 12, coke is placed in the hopper 13, coke (different properties from the coke in the hopper 13), ore, pellets, sintered ore, limestone, or silica stone is placed in the hopper 14. If you put it in,
By simultaneously opening the hoppers 13,14, it is possible to mix the raw materials in the hopper 14 into the coke. Moreover, if the hoppers 12 and 14 are opened at the same time, the raw materials in the hoppers 14 can be mixed and charged into the ore. In addition, a fine brand of ore is placed in the hopper 12, a coarse brand of ore is placed in the hopper 13, and coke is placed in the hopper 14. When putting ore into the blast furnace, the hopper 12 is opened for the surrounding area of the blast furnace, and the center of the blast furnace is placed in the hopper 12. By opening the hopper 13, the distribution of ore can be made different between the periphery and the center.

(Effects of the Invention) As described above, according to the method of the present invention, raw materials such as coke and ore can be mixed and charged, and the distribution of raw materials can be made arbitrary. Improve operational efficiency. Note that the present invention is not limited to three hoppers, but it goes without saying that four or more hoppers may be used.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of a bellless charging device according to the present invention, and FIG. 2 is an explanatory diagram showing the arrangement of each hopper. 11...Furnace body, 12,13.14...Hopper, 15...Opening/closing plate, 16...Swivel chute.

Claims (2)

[Claims] (1) A bellless charging device for a blast furnace, which is provided with at least three hoppers at the top of the blast furnace that can arbitrarily supply raw materials into the blast furnace. (2) The bellless charging device according to claim 1, wherein all of the material charging devices of at least three or more hoppers are equipped with a discharge control device that allows material charging into the furnace at the same time.