JPH03181791A - Manufacture of sintered ore - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for preventing sloping that occurs when igniting sintered raw materials and for manufacturing sintered ore with high productivity. .

[Prior Art] Sintered ore is generally produced by an endless moving grade sintering machine as shown in FIG. That is, the sintering machine includes an endless pallet 1 that moves continuously in a certain direction,
A plurality of wind boxes 2 are provided below the pallet l along the movement direction thereof, and a hopper 3 for supplying raw materials is provided above the upstream end of the pallet 1 and has a roll feeder 4 at its lower end. A chute 5 inclined at a predetermined angle, the upper end of which is located directly below the roll feeder 4 and the lower end located above the pallet 1; It consists of an ignition furnace 6 for igniting raw materials and a crusher 7 provided near the downstream end of the pallet l.

The raw material in the hopper 3 is cut out by a roll feeder 4, passes through a chute 5, and is delivered to a continuously moving pallet I-
1. The raw materials charged into pallet 1 are
In the ignition furnace 6, coke powder on the surface thereof is ignited by combustion gas injected from multiple rows of burners provided in the width direction of the ignition furnace 6.

High-temperature combustion exhaust gas produced by combustion of coke breeze is sucked downward by a wind box 2 provided below the pallet 1, heats the raw material in the pallet 1, and burns it. In this way, the sintered ore produced in the pallet 1 is discharged from the downstream end of the pallet 1 and passed through the crusher 7.
The particles are crushed to a predetermined particle size.

As shown in FIG. 3, between the hopper 3 and the ignition furnace 6,
Contacting the surface of the raw material 8 charged in pallet l-1,
A pressure roller 9 having a cylinder 10 is provided for pressurizing the raw material 8.

The pressure roller 9 pressurizes the raw material 8 charged into the pallet 1, and prevents the slopping of the raw material caused by the combustion gas injected from the burner 6a toward the raw material 8 at the time of ignition in the ignition furnace 6, and This prevents slag from adhering to the tip of the burner 6a due to ropping.

[Problems to be Solved by the Invention] As described above, in order to prevent slag from adhering to the tip of the burner 6a due to slopping that occurs in the ignition furnace 6, the raw material 8 charged in the pallet 1 is is pressed by a pressure roller 9.

As a result, even if the occurrence of slopping is prevented, the air permeability of the raw material layer within the pallet 1 deteriorates.

The air permeability of the raw material layer has a great effect on the production efficiency of sintered ore, and the production rate of sintered ore decreases significantly due to the deterioration of air permeability.

Therefore, an object of the present invention is to provide a method for producing sintered ore that can prevent the occurrence of slopping during ignition of raw materials without reducing the production efficiency of sintered ore.

[Means for Solving the Problems] The present invention supplies raw materials into the pallet at the upstream end of a continuously moving pallet of an endless moving grade sintering machine; of,
Pressure is applied by a pressure roller, and then the raw material in the pallet is ignited in an ignition furnace, and the combustion exhaust gas is sucked downward by a wind box provided below the pallet, and is blown into the pallet. In the method for producing sintered ore, the ignition furnace is provided with a detector for detecting the occurrence of slopping, and based on the detection signal of the occurrence of slopping from the detector, The present invention is characterized in that the pressure applied by the pressure roller to the raw material in the pallet is controlled.

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is an explanatory diagram of the vicinity of an ignition furnace showing the method of the present invention. As shown in FIG. 1, a pressure roller 9 having a cylinder 10 is provided between the hopper 3 and the ignition furnace 6, and the raw material 8 charged into the pallet 1 is moved by the pressure roller 9.
Pressurizing is the same as in the past.

A plurality of detectors 11 for detecting the occurrence of slopping are installed on one side wall 6a of the ignition furnace 6 toward a position 50 to 100 mm below the lower end of the burner 6a.
is provided in the width direction. As the detector 11, a laser light sensor, an ultrasonic sensor, an industrial television, etc. are used.

A detection signal from the detector 11 is sent to a controller 12 that operates the cylinder 10 of the pressure roller 9.

The cylinder 10 is actuated by a signal from the controller 12 and controls the pressure applied by the pressure roller 9 to the raw material 8 in the pallet 1.

The raw material 8 in the pallet 1 is constantly pressurized by a pressure roller 9, but the pressure is controlled to be the minimum necessary when no slopping occurs in the ignition furnace 6. 12.

When the detector 11 detects the occurrence of slopping, a signal thereof is immediately sent to the controller 12. The controller 12 operates the cylinder 10 based on the signal,
The pressure roller 9 is lowered to increase the pressure applied to the raw material 8 in the pallet 1. When the detector 11 detects that the occurrence of slopping has disappeared due to the pressurization of the raw material 8, the signal is immediately transmitted to the control plumber 2.
The cylinder 10 is operated to return the pressurizing force to the raw material 8 to the minimum necessary state.

[Effects of the Invention] As described above, according to the present invention, only when slopping occurs in the ignition furnace 6, the pressure roller 9
The pressurizing force against the raw material 8 in the pallet 1 is increased by this, and when slopping does not occur, the pressurizing force is controlled to the necessary minimum. Therefore, without reducing the production efficiency of sintered ore, it is possible to immediately eliminate the occurrence of slopping during ignition of raw materials, prevent sludge from adhering to the tip of the burner, and ensure smooth operation. can.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the vicinity of the ignition furnace of the sintering machine showing the method of the present invention, Fig. 2 is an explanatory diagram of the endless moving grade type sintering machine, and Fig. 3
The figure is an explanatory diagram of the vicinity of a conventional sintering machine ignition furnace. In the drawings, 1... Pallet, 2... Wind box, 3... Hopper, 4... Roll feeder, 5... Chute, 6... Ignition furnace, 7... Crusher,
8... Raw material, 9... Pressure roller, 10... Cylinder, 11... Detector, 12... Controller.

Claims (1)

[Claims] 1. Feeding raw materials into the pallet at the upstream end of the continuously moving pallet of the endless moving grade sintering machine;
Next, the raw material supplied into the pallet is pressurized by a pressure roller, the raw material in the pallet is ignited in an ignition furnace, and the combustion exhaust gas is directed downward through a wind box provided below the pallet. In the method for producing sintered ore, the method comprises sucking the raw material in the pallet toward the sintered ore, and thus sintering the raw material in the pallet, wherein a detector is provided in the ignition furnace to detect the occurrence of slopping, and the detector A method for manufacturing sintered ore, characterized in that the pressure applied by the pressure roller to the raw material in the pallet is controlled based on a detection signal of the occurrence of slopping.