JPH05296674A - Operating method of control damper - Google Patents

Abstract

PURPOSE:To permit the collection of gas smoke from a plurality of generating sources efficiently by a method wherein the opening degree of a plurality of control dampers for preventing the leakage of gas smoke is regulated by remote control from the operating chamber of a ceiling crane. CONSTITUTION:The remote control panels of all control dampers are installed in a ceiling crane. The operating chamber of the crane is in a high place and, therefore, a plurality of generating sources can be seen therefrom whereby gas smoke can be sucked most efficiently by operating the control dampers. When operators in charge of a furnace are not waiting upon charging mat into a converter, for example, one series of operations of not only the regulation of the opening degrees of respective dampers but also the opening and closing of a mat charging port, the setting of a traversing hood and the like can be effected from the operating chamber of the crane by remote control. According to this method, the leakage of sulfur dioxide gas smoke can be prevented perfectly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for opening and closing a plurality of control dampers.

[0002]

2. Description of the Related Art Copper smelting operation usually consists of a smelting furnace, a converter and a refining furnace. In the smelting furnace, copper concentrate is melted and divided into mat and slag, slag is subjected to water granulation, and mat is a converter. The slag is crushed after casting to be subjected to beneficiation, and the wrought copper is treated in a refining furnace to further remove impurities and cast in an anode mold for electrolytic refining. In the smelting furnace, iron sulfide in the copper concentrate burns to generate sulfurous acid gas, and a reaction occurs to form slag with iron oxide and silicon oxide.In the converter, the remaining iron sulfide in the mat is sulfurous acid gas. Then, a reaction to form slag occurs, and subsequently, a desulfurization reaction of copper sulfide produces sulfurous acid gas and crude copper. Sulfurous acid gas generated in the main reaction between the smelting furnace and the converter is sent to the sulfuric acid manufacturing process through a dedicated exhaust gas treatment path.

By the way, the above-mentioned mat contains sulfur, and when the mat comes into contact with air, it produces a small amount of sulfurous acid gas and at the same time produces dust, resulting in sulfurous acid gas smoke (hereinafter referred to as gas smoke).

Since the converter is a batch operation in which the mat is transferred from the smelting furnace by a ladle, gas smoke leakage is unavoidable when the mat is charged, the slag is poured, and the copper is transferred. A hood, a control damper, and a duct are installed in all of these leaked gas smoke sources, and environmental smoke collecting equipment is installed to discharge the leaked gas as harmless gas by sucking and processing it.
The leaking gas smoke is being sucked in and processed. Each control damper is provided with a remote control panel that can be fully opened and fully closed, and each smelting furnace operator opens and closes the remote control panel whenever necessary.

Now, as the blowing of air into the converter is improved to the blowing of oxygen-enriched air, and the processing capacity of the smelting equipment is remarkably improved, the number of batches increases and the chances of gas generation increase.

As a result, it is required to open and close the control damper frequently, but since other work also increases, it is necessary to increase the number of workers in order to perform the opening and closing operation at an appropriate time. Of course, if the number of workers is not increased, the control damper will not open and close properly, and if it is closed at the time when it should be opened, the suction wind speed of the hood will fall below the restricted wind speed (capture speed) and gas smoke will be sucked. However, the gas smoke leaks into the factory, and conversely, if it is opened at the time when it should be closed, excess air is sucked and the load of the suction blower becomes high.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of operating a control damper for efficiently collecting gas smoke from a plurality of sources.

[0008]

According to the present invention, the degree of opening and closing of a plurality of control dampers can be efficiently controlled by a remote operation from an overhead crane operation room capable of overlooking a plurality of sources to prevent leaked gas smoke. The point is characteristic.

[0009]

As described above, the mat is delivered by the ladle, and an overhead crane is usually used to carry the ladle, and the crane cab is provided at a position where the ladle can be easily seen. That is, since the crane cab is located at a high place and can overlook a plurality of generation sources, if the control damper can be operated from this location, the gas smoke can be sucked most efficiently. Therefore, we installed remote control panels for all control dampers in the overhead crane.

The control damper operation panel for each source can be operated by a worker on the ground, but if the damper opening is too wide when viewed from the operator's cab, it is throttled, and if it is forgotten to be closed, it is closed. Readjust.

Further, even when the operator in charge of the furnace is not on standby at the time of loading the mat into the converter, the opening / closing of the mat loading opening, the loading of the mat, and the adjustment of the opening / closing degree of each damper can be performed. It is also possible to remotely perform a series of operations such as setting of a swivel hood when the empty ladle after charging the mat is left in front of the furnace from the crane cab.

[0012]

According to the present invention, the leakage of sulfurous acid gas smoke can be completely prevented.

Claims (1)

[Claims] 1. A control method for operating a plurality of control dampers of a smoke collecting facility having a plurality of suction parts, wherein the opening / closing degree of the control damper is adjusted by a remote operation panel installed in an operation room of an overhead crane. How to operate the damper.