JPS589945A - Water-cooled breaker and removing method for oil-can from flash smelting furnace - Google Patents

Abstract

PURPOSE:To easily remove oil-can accumulated on the uptake of an flash smelting furnace for copper while saving man power without requiring skill by using a water-cooled breaker. CONSTITUTION:When heat of hot water gas generated in a flash smelting furnace for copper is recovered with a boiler, oil-cans grown on the uptake of the exhaust port of the furnace by the accumulation of ore dust, and the waste gas permeability is reduced, resulting in a lower rate of operation of the furnace. To remove the oil-cans a water-cooled rod 24 repeatedly hits on the oil-cans 21. By working the 3rd hydraulic cylinder 20 and a pneumatic cylinder 22, the force of an impact hammer is provided to the rod 24. The rod 24 can be brought into contact with the position of the oil-cans 21 on the uptake 2 at a suitable angle by horizontal movement by a hydraulic cylinder 14 on a carriage 8 and rotation by the 2nd hydraulic cylinder 16. Thus, the oil-cans can be easily removed without using fuel such as heavy oil.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a water-cooled breaker for use in removing debris accumulated in the up-tee portion of a flash furnace used in flash smelting, and a method for removing debris from the plate. Regarding.

The exhaust gas generated in the flash smelting furnace used for smelting copper ore is extremely high at 1.300°C, and moreover, this exhaust gas contains a lot of dust, which is liquid ore. ing. This exhaust gas was installed at the tip of the flash furnace, and the exhaust heat was collected and cooled by the furnace. Therefore, is the uptick, which is the exhaust gas outlet of the flash furnace, mentioned above? At the joint, the exhaust gas is cooled and the SLF gradient becomes very large.The cooled dust becomes semi-integrated and deposits at the joint. This deposit is usually called a flash smelting smelter, and the ventilation resistance of the two flash smelting furnace exhaust gases in which the deposit grows increases, eventually making it impossible to vent.

As an example of the conventional method for removing the above-mentioned beko, heavy oil is poured into the 4-barrelation section. A method of unremoval of flI is known, but this method has the following drawbacks. First, the K that dissolves Beko is the # gas il @ 1.3 that passes through the uptick.
Not only does it have to be heated to a temperature higher than 00°C, but it must also be taken into consideration that the heat of the beco will escape through the iller.Therefore, the dissolution efficiency of the beco is poor and the amount of heavy oil consumed will be large. Second, the use of heavy oil increases exhaust gas, which increases the heat load on the furnace, and also reduces the heat recovery rate of the furnace due to dust adhesion that is characteristic of flash furnace waste heat and furnaces. Thirdly, the ceiling and side walls of the uptick are made of brick or castable refractories, but long-term use of heavy oil causes significant wear and tear on the bricks and caster refractories, resulting in a large amount of heat loss due to heat dissipation from the wall. ,
Fourthly, the ceratora of a flash smelting furnace separates the 119 wrinkles and trowels by melting copper ore and chemical reactions, but when the trowel is discharged from the ryuttler, it melts or melts due to the burning of heavy oil from the uptick. Beko, who is in a molten state, mixes with Yuu, and this alleviates Go's trouble of getting stuck in the trowel's opening.

Another example of traditional beko removal methods is Dyna! There is a known method of destroying and removing beko by using light. This method requires the furnace to be shut down, which is unproductive, and also poses many safety problems for workers and equipment. The labor cost will be considerably high.

The present invention is a book aimed at providing a water-cooled breaker for use in a flash furnace, etc., which eliminates the above-mentioned drawbacks of the conventional art, and a method for removing flash furnace cracks. However, in the breaker, a circulation flow path is provided inside the rod member of the breaker which heats up the high temperature inside the flash furnace, and cooling water is allowed to flow through the circulation flow path.

Furthermore, a method for removing slag in a flash melting furnace, which comprises removing sludge using a rod member while flowing cooling water through a circulation channel provided inside the rod member in the flash smelting furnace during operation. It is.

Since the present invention is constructed using KII as described above, heavy oil is not used at all, contributing to resource savings. Even if the flash smelting furnace breaks down during operation, it can easily remove the debris from the ceiling of the furnace by creating a negative pressure inside the furnace, resulting in high productivity. Removal of beko with a single shot of IIAVc is a harmful bird and does not require skill and requires less manpower.In other words, the present invention conventionally eliminates the red heat within a few minutes when a breaker rod is inserted into a flash furnace. This is a one-time project that overturns the conventional wisdom among manufacturers that it is impossible to use a breaker rod in a flash smelting furnace during heavy operation.

Below, an actual example of the present invention will be explained with reference to aK.

As shown in No. 111, the breaker 1 for mold tank furnaces by Book 1@Akira has a breaker insertion port provided near the joint between the uptick 2, which is the exhaust gas outlet of the flash smelting furnace, and the slug 4. 6, it is inserted into uptick I12. The breaker #1, a bogie 8 km attached, and a f L/-0 bogie $ held by a car operating device 10 are moved by a drive device 12 on a predetermined rail. Play car operating device 1,011, first hydraulic cylinder 14, second hydraulic cylinder 16, column IHt18 and fifth hydraulic cylinder y
Consists of l-3!0. The first hydraulic cylinder 14 is for operating the breaker 1 in the horizontal direction tc11.

The pressure cylinder 16 is for rotating the breaker 1 around the lower end of the support member 180, and the third hydraulic cylinder 20 is for moving the breaker 1 back and forth over the breaker insertion port 21. be. As shown in FIG. 112, the breaker 1 includes a pneumatic cylinder 22,
The rod member 24, the water supply pipe 1!6 and the drain pipe attached to the rod member 24! Consisting of 8. The pneumatic cylinder 22 is for applying a hammering force in the direction of the rod member 24 to the heel 21 with an air pressure of 4 to 5 kg/an'. A first practical example of the rod member 24 is, as shown in FIG.
A transverse cylindrical hole 3 for communicating with the other cylindrical hole 30
z, and both ends 34 of this III! Add salt. The jid member 24 may be constructed by joining several rods P together due to processing technology.

j12m of rod member 24! In Example III, as shown in the iris diagram, an even number of cylindrical halves S# (or gutter-like members) 29 are welded to the outer wall of the round bar 27 in the length direction. The cooling water passage at the tip of the rod member 24 is constituted by a transverse cylindrical hole as in the first refreshing example.

As shown in FIG. 4, the breaker insertion port 6 of the flash furnace 2 is located near the uptick portion 40 at the top of the flash furnace 2 K, 1I.
IllI flexible Il[, 42 are arranged.

Next, we will explain the operation of the deraker for flash-smelting furnaces with primary configuration. Negative pressure KL
, remove the flash furnace shell 842 and insert the breaker insertion port 6.
6 Next, drive value f11! Activate the trolley 8
Move it to the appropriate place and fix it. Then, the first cylinder 14, the second cylinder 16, and the fifth cylinder 20 are operated, respectively, and the rad member 24 is inserted into the plaaker insertion port 6. At this time, the cooling water continues to be supplied to the rod member 24 through the water supply pipe 26, and continues to be discharged from the drain pipe 28. Preparation for removing the water is completed. The removal operation is performed by applying hammer force to the rod member 24 by operating the gs cylinder 20 and the pneumatic cylinder 22.

Next, the design method and cooling capacity of the rod member 24 using cooling water will be explained using numerical examples. Generally, the amount of heat transfer in the uptick of a flash smelting furnace used for copper smelting is 100
Mcal 7m2h K reaches 0 For example, rod member 2
4 diameter 100sa*, rod member 2 inserted into the furnace
If the length of rod 4 is 4.0OOtg, the amount of heat transferred to the rod will be 126, 4Mcsl/h.

Assuming that the cooling water maintains a temperature of 20°C during supply and 60°C during discharge, it is necessary to flow 5.2 t/h of cooling water. The diameter of the rod member 24 is 100 fl.

The diameter of the cylindrical hole 30 of the rod member 24 is 20 m11. The maximum distance from the cooling water to the surface of the rod member 240 is 50U, and the amount of heat transferred from the high ffl gas is 100,000 cal.
7m2h ℃s Cooling water temperature [40℃. The general formula for heat transfer is: q=α(tb -ta) Kcal/m2h ℃=λ
/ l (tc - tb) is expressed as cat/mht:. Here, α is the heat transfer coefficient (Kcat/m2h °C)
, λ is the thermal conductivity (in cal/mh'C), and t is the thickness (m). Therefore, 100.000 cat/m2ht: = 2,000
ca4/m2ht:
0.05 to ca4/mh℃X (to-9o℃tc =
201℃ In other words, the temperature of the outer surface of the rod member in contact with the gas is 20℃.
It becomes 1℃.

Therefore, the rod member can sufficiently withstand the temperature inside the furnace.

Next, when the present invention is actually used in a large flash furnace, the ventilation resistance of Agtake, the heavy oil consumption of Beko melting, and the electricity consumption of Beko melting will be compared with the case where heavy oil is used to melt Beko. show. The electricity consumption of the above-mentioned beco melting is for driving the ventilation fan of the flash melting furnace.

[Brief explanation of drawings]

Fig. 1 is a detailed explanatory diagram of the present invention, Fig. 2 is a cross-sectional view of the first embodiment of the rod member, Fig. 3 is a longitudinal sectional view of the second embodiment of the rod member, and Fig. 4 is a self-melting FIG. 3 is a perspective view of the vicinity of the gray car insertion part of the furnace. 1... Breaker for flash furnace - 12... Uptick,
4...Ira, 6...Breaker insertion port, 8...
Trolley, 10... Player operating device, 24... Rod member Fig. 4

Claims (1)

[Scope of Claims] (1) A (water-cooled) breaker characterized in that a circulation flow path is provided in 11 of the rod members of the breaker, and the circulation 1IrItWsVc cooling water flows therethrough (8) Self-fusing during operation A method for removing tongues in a flash-smelting furnace, in which the tongues are removed by the rod member while flowing cooling water through a circulation passage provided inside the rod member in the furnace. +31 41. The flash-melting furnace removal method according to claim 2, wherein the inside of the flash-melting furnace is kept under negative pressure KL, and the upper member is inserted into the flash-melting furnace from the ceiling of the furnace.