JPH07151472A - Dust collecting method for sintered ore - Google Patents

Abstract

PURPOSE:To effectively and cheaply collect dust to be generated in crushing of sintered ore by injecting compressed air toward the crushed sintered ore from a compressed air injecting nozzle provided under a primary crusher and collecting dust generated by crushing after forcibly floating it. CONSTITUTION:When sintered ore sintered by a sintering machine 21 is crushed by a primary crusher 3 in an exhaust ore part 2, compressed air is injected toward the sintered ore from a compressed air injecting nozzle 4 provided under the primary crusher 3. Dust 5 generated according to crushing of the sintered ore, and to be settled by gravity exists in the space to which compressed air is injected, and it is blown up by compressed air. The dust 5 forcibly floated is collected by a dust collecting machine 6 provided above the exhaust ore part 2. Since the dust to be settled to the lower part is also collected, dust collecting efficiency in the exhaust ore part 2 is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for collecting dust generated when a large lump of sintered ore sintered by a sintering machine is crushed by a primary crusher.

[0002]

2. Description of the Related Art Large blocks of sintered ore discharged from a sintering machine are
After being crushed by the primary crusher at high temperature, it is fed to a sinter cooler, cooled, and then discharged. Dust is generated in the air when these sinters are discharged, crushed, and fed, but these dusts are collected in the dust collector installed above the sinter ore cooler of the sinter or the sinter cooler. Dust is collected by the device. As a dust collector for the sinter cooler, a louver dust collector is provided between the cooling zone of the cooler and the exhaust tower,
The method of spraying water in the exhaust tower is adopted.

However, since the amount of the dust-containing gas after cooling the sinter is large, it takes a great equipment cost to collect the total amount of exhaust gas. Generally, only a tower is provided with a simple dust collector such as the louver type dust collector.

Further, in order to deal with such a problem, in the dust collecting method for a sinter ore cooler based on the technique disclosed in Japanese Patent Laid-Open No. 5-79770, the cooler is cooled in the first half and in the second half. In the first half of cooling, the sinter ore is cooled and forced dust is generated by the cooling air, and the gas in only the second half of cooling is processed by the dust collector.

Further, in the dust collecting method of the sinter ore cooler based on the technique disclosed in Japanese Patent Application Laid-Open No. 60-208428, the high-concentration dust generating section is a high-performance dust collecting section, and the low-concentration dust generating section is simple. I try to collect dust with a dust collector.

[0006]

However, the above-mentioned conventional dust collecting method for the sinter cooler has the following problems. (1) Method using a louver-type or spray-type simple dust collector Although it is advantageous in terms of cost, the dust collection efficiency is low and a large amount of dust is discharged into the atmosphere from the exhaust tower. (2) JP-A-5-79770 and JP-A-60-20
The method disclosed in Japanese Patent No. 8428 has a large equipment cost and is not economical even though it is efficient.

The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a method for collecting dust of sinter that can efficiently collect dust at a low cost. Has an aim.

[0008]

The method for collecting dust of a sintered ore according to the present invention is generated when a large lump of the sintered ore sintered by a sintering machine is crushed by a primary crusher in an effluent section. Generated by crushing by injecting compressed air toward the crushed sinter from the compressed air injection nozzle provided below the primary crusher in the method of collecting the dust that is generated by the dust collector installed above the primary crusher. The dust is forced to float and collected.

[0009]

The dust generated when the sinter ore is crushed and settling downward due to gravity is forcibly suspended by compressed air and collected by the dust collector provided above the primary crusher. Therefore, the dust collection efficiency at the time of crushing is increased. Therefore, when the sinter ore is cooled after crushing, the concentration of the dust contained in the cooling gas is low, the dust can be efficiently collected even by the simple dust collector, and the atmosphere is not polluted with the dust.

[0010]

EXAMPLE A method of collecting dust of sinter according to an example of the present invention will be described with reference to the explanatory view of FIG. In this dust collecting method, when the sintered ore 1 sintered by the sintering machine 21 is crushed by the primary crusher 3 in the discharge ore section 2, from the compressed air injection nozzle 4 provided below the primary crusher 3, Compressed air is jetted toward the sintered ore 1. In the space into which the compressed air is jetted, there are dusts 5 that are generated due to the crushing of the sintered ore 1 and are about to settle due to gravity, but these dusts 5 are blown up by the compressed air.

The dust 5 thus forcibly suspended is collected by a dust collector 6 provided above the mine ore section 2. In this dust collection method, even the dust that has conventionally settled downward is collected, so that the dust collection efficiency in the mine unit 2 is increased. The crushed sinter 1a enters the cooler 23 from the ore feeding section 22 and is cooled by the cooling air sent from the cooling blower 25 while moving the cooler 24 to the discharge ore section 23.

The dust-containing air that has passed through the cooling zone 26 of the cooler 23 has a small amount of dust because the dust is collected in the exhaust ore section 2 in an amount of 90% or more, and is exhausted directly from the exhaust tower 27. However, it does not pollute the atmosphere. The dust collector 6 may be an electric dust collector or a bag filter dust collector.

[0013]

According to the present invention, the dust of the sintered ore can be efficiently collected at a low cost and the air pollution does not occur.

[Brief description of drawings]

FIG. 1 is an explanatory view of a method for collecting dust of a sintered ore according to an embodiment of the present invention.

[Explanation of symbols]

 1 Sintered ore 2 Exhaust ore part 3 Primary crusher 4 Compressed air injection nozzle 5 Dust 6 Dust collector

Claims (1)

[Claims] 1. A method of collecting dust generated by crushing a large lump of sinter ore sintered by a sinter with a primary crusher in an effluent section by a dust collector provided above the primary crusher. Sintered ore characterized by injecting compressed air toward a crushed sinter from a compressed air injection nozzle provided below the primary crusher and forcibly suspending the dust generated by the crush and collecting the dust. Dust collection method.