A carbonized slag smelting electric furnace

Abstract

The present invention discloses an electric furnace for smelting carbonized slag, comprising a rectangular furnace and a furnace bottom, the rectangular furnace and the furnace bottom being fixedly connected, a slag outlet being provided at the connection between the two, and the rectangular furnace comprising furnace walls and at least one insulating member. The present invention utilizes a rectangular furnace design, which is divided into sections using insulating members. Each section is equipped with an electrode heating function, and different sections perform different functions, ultimately achieving continuous smelting. This avoids problems such as blockage of the slag outlet caused by frequent opening and closing, thereby accelerating the smelting process and increasing production.

Description

Technical Field

[0001] The present invention relates to the technical field of smelting, in particular to a carbonized slag smelting electric furnace. Background Art

[0002] The carbonization furnace of the Panzhihua Iron and Steel Titanium-containing Blast Furnace Slag High-temperature Carbonization Demonstration Line uses liquid Panzhihua Iron and Steel Titanium-containing Blast Furnace Slag and coke powder as raw materials, and a three-phase AC electric furnace as the reaction vessel. Liquid carbonized slag is obtained through reduction carbonization reaction.

[0003] Current electric furnaces are circular, and due to the specific nature of the process, only intermittent smelting is possible, not continuous smelting. Intermittent smelting, however, leads to a series of problems, including frequent opening and closing of the slag tap, which leads to blockage, slow smelting, and low production output.

[0004] In view of this, the existing technology should be improved to solve the above-mentioned technical problems existing in the existing technology. Summary of the Invention

[0005] The main purpose of the present invention is to provide a carbonized slag smelting electric furnace to solve the problems of frequent opening and closing of the slag outlet caused by intermittent smelting, resulting in slag outlet blockage, slow smelting rhythm and low output.

[0006] According to one aspect of the present invention, a carbonized slag smelting electric furnace is proposed, which includes: a rectangular furnace and a furnace bottom, the rectangular furnace and the furnace bottom are fixedly connected, a slag outlet is provided at the connection between the two, and the rectangular furnace includes a furnace wall and at least one isolation component.

[0007] According to one embodiment of the present invention, the aspect ratio of the rectangular furnace is (3-3.5):1.

[0008] According to one embodiment of the present invention, the isolation component vertically extends from the furnace bottom to the furnace top and is parallel to the furnace wall.

[0009] According to one embodiment of the present invention, the isolation component is detachably plugged into the furnace bottom.

[0010] According to one embodiment of the present invention, the isolation component is made of copper and is hollow inside, and can be cooled by water.

[0011] According to one embodiment of the present invention, two isolation components are provided to divide the rectangular furnace into three adjacent areas on the left, middle and right.

[0012] According to one embodiment of the present invention, the three regions are all provided with heatable electrodes.

[0013] According to one embodiment of the present invention, the power density of the electrode heating is 660-670 kW / m 2 .

[0014] According to one embodiment of the present invention, the slag outlet is arranged near the edge of the furnace bottom.

[0015] According to one embodiment of the present invention, the slag outlet is higher than the furnace bottom in the horizontal direction.

[0016] In a carburizing slag smelting electric furnace according to an embodiment of the present invention, the furnace is designed as a rectangular furnace and divided into sections using insulating components. Each section is equipped with an electrode heating function, and different sections perform different functions, ultimately achieving continuous smelting. This design avoids problems such as slag tapping blockage caused by frequent opening and closing, speeding up the smelting process and increasing production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some implementation cases of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of a carbonized slag smelting electric furnace according to an exemplary embodiment of the present invention is shown.

[0019] The reference numerals in the figures are described as follows:

[0020] 1-furnace wall; 2-furnace bottom; 3-isolation components; 4-slag outlet; 5-finished product area; 6-reduction area; 7-heating area. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] like Figure 1As shown, a carbonized slag smelting electric furnace includes: a rectangular furnace and a furnace bottom 2, the rectangular furnace and the furnace bottom 2 are fixedly connected, and a slag outlet 4 is provided at the connection between the two. The rectangular furnace includes a furnace wall 1 and at least one isolation component 3.

[0024] In the carbonized slag smelting electric furnace according to an embodiment of the present invention, the bottom portion is a furnace bottom 2, above which is a rectangular furnace having an aspect ratio of (3 to 3.5):1. The rectangular furnace includes a furnace wall 1 and at least one insulating member 3. The insulating member 3 extends vertically from the furnace bottom 2 toward the furnace top, parallel to the furnace wall 1, and is removably connected to the furnace bottom 2.

[0025] In some embodiments, two isolation components 3 are vertically inserted into the furnace bottom 2, dividing the rectangular furnace into three adjacent zones: left, center, and right. These three zones serve different functions. In practice, they are referred to as the heating zone 7, the reduction zone 6, and the finished product zone 5. The order of the three zones can be adjusted according to actual needs. The heating zone 7 is used to heat titanium-containing blast furnace slag, the reduction zone 6 is used to add coke powder for reduction, and the finished product zone 5 is used to store the finished product after the reaction. The fluidity of the liquid slag between the different zones enables continuous smelting, accelerating the smelting process.

[0026] The three areas are all provided with heatable electrodes, and the power density of the electrode heating is 660-670kW / m 2 During operation, the liquid levels in the three zones of the rectangular furnace can be adjusted by pulling the isolation member 3 upwards away from the furnace bottom 2 or pushing it downwards into the furnace bottom 2. Once the liquid levels are level, electrode heating is performed and coke powder is added for reduction. The coke powder addition rate is 100 kg / min, resulting in a final coke powder to slag mass ratio of 12%.

[0027] The isolation member 3 can be a partition plate made of copper, hollow inside, and can be cooled by water. Cooling the copper plate with water can ensure that the temperature can be reduced in time when the reaction temperature is too high, reducing damage to raw materials and equipment and extending the service life of the rectangular furnace.

[0028] A slag outlet 4 is provided at the connection between the rectangular furnace and the furnace bottom 2. The slag outlet 4 is provided near the edge of the furnace bottom 2 and is horizontally higher than the furnace bottom 2. The slag outlet 4 is used to discharge slag after the reaction is completed.

[0029] Example 1

[0030] The electric furnace model is rectangular with a length-to-width ratio of 3:1. The rectangular furnace is divided into three areas along the long side by partitions, namely the heating area, the reduction area, and the finished product area. The partitions are hollow copper plates that can be cooled by water. Each area is equipped with electrodes, which have a heating function. The power density of the electrode heating is 665kW / m 2 .

[0031] The partition between the heating zone and the reduction zone is numbered "Partition 1," and the partition between the reduction zone and the finished product zone is numbered "Partition 2." Initially, both partitions are lowered to the bottom, and liquid Panzhihua titanium-containing blast furnace slag is poured into the heating zone. The electrodes in the heating zone begin heating. After the slag temperature rises to approximately 1600°C, partition 1 is lifted. Once the liquid levels in the heating and reduction zones are level, partition 1 is lowered. The electrodes in the reduction zone begin heating, and coke powder is added to the reduction zone at a rate of 100 kg / min until the mass ratio of coke powder to the slag reaches 12%. Ten minutes after the coke powder has been added, partition 2 is lifted. Once the liquid levels in the reduction and finished product zones are level, partition 2 is lowered. The electrodes in the finished product zone begin heating. After the slag temperature rises to 1700°C, the slag outlet is opened for discharge. The electrodes in all three zones continue heating, and the above operation is repeated, ultimately achieving continuous smelting.

[0032] According to the smelting rhythm of the scaled-down electric furnace model, the output can be increased by 30%.

[0033] Example 2

[0034] The electric furnace model is rectangular with an aspect ratio of 3.5:1. The rectangular furnace is divided into three areas by partitions in the long direction. The three areas are heating area, reduction area and finished product area. The partitions are hollow copper plates that can be cooled by water. Each area is equipped with electrodes with heating function. The power density of electrode heating is 665kW / m 2 .

[0035] The partition between the heating zone and the reduction zone is numbered "Partition 1," and the partition between the reduction zone and the finished product zone is numbered "Partition 2." Initially, both partitions are lowered to the bottom, and liquid Panzhihua Iron and Steel titanium-containing blast furnace slag is poured into the heating zone. The electrodes in the heating zone begin heating. After the slag temperature rises to 1600°C, partition 1 is lifted. Once the liquid levels in the heating and reduction zones are level, partition 1 is lowered. The electrodes in the reduction zone begin heating. Coke powder is added to the reduction zone at a rate of 100 kg / min until the mass ratio of coke powder to the slag reaches 12%. Ten minutes after the coke powder has been added, partition 2 is lifted. Once the liquid levels in the reduction and finished product zones are level, partition 2 is lowered. The electrodes in the finished product zone begin heating. After the slag temperature rises to 1700°C, the slag outlet is opened for discharge. The electrodes in all three zones continue heating, and the above operation is repeated to ultimately achieve continuous smelting.

[0036] According to the smelting rhythm of the scaled-down electric furnace model, the output can be increased by 35%.

[0037] The present invention can solve a series of problems caused by intermittent smelting, such as frequent opening and closing of the slag outlet leading to slag outlet blockage, slow smelting rhythm and low output, by designing the electric furnace as a rectangular furnace and realizing zoned operation, thereby realizing continuous smelting, reducing the number of slag outlet blockages, ensuring the cleanliness of the equipment interior, reducing the number of abnormal equipment shutdowns, eliminating potential safety hazards, extending the equipment operation cycle and improving production efficiency.

[0038] The above are exemplary embodiments disclosed in the present invention. The order in which the above embodiments of the present invention are disclosed is for description only and does not represent the pros and cons of the embodiments. However, it should be noted that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope disclosed in the embodiments of the present invention (including the claims) is limited to these examples. Various changes and modifications may be made without departing from the scope defined in the claims. The functions, steps and / or actions of the method claims according to the disclosed embodiments described herein do not need to be performed in any particular order. In addition, although the elements disclosed in the embodiments of the present invention may be described or required in individual form, they may also be understood as multiple unless expressly limited to the singular.

[0039] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples. Within the spirit of the embodiments of the present invention, the technical features of the above embodiments or different embodiments may be combined, and there are many other variations of the different aspects of the embodiments of the present invention described above, which are not provided in detail for the sake of clarity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included within the scope of protection of the embodiments of the present invention.

Claims

1. A carbonized slag smelting electric furnace, characterized in that: include: A rectangular furnace and a furnace bottom, wherein the rectangular furnace and the furnace bottom are fixedly connected, a slag outlet is provided at the connection between the two, the slag outlet is provided near the edge of the furnace bottom, and the slag outlet is higher than the furnace bottom in the horizontal direction; The rectangular furnace includes a furnace wall and at least one isolation component, wherein the isolation component vertically extends from the furnace bottom toward the furnace top and is parallel to the furnace wall, and the isolation component is detachably plugged into the furnace bottom; The isolation components are provided in two numbers, dividing the rectangular furnace into three adjacent areas on the left, middle and right sides; the three areas include a heating area for heating titanium-containing blast furnace slag, a reduction area for adding coke powder for reduction, and a finished product area for placing finished products after the reaction; During use, the isolation component can be pulled up and away from the furnace bottom or pushed down and inserted into the furnace bottom to adjust the liquid levels of the three areas, and continuous smelting is achieved through the fluidity of liquid slag between different partitions.

2. The carbonized slag smelting electric furnace according to claim 1, characterized in that: The aspect ratio of the rectangular furnace is (3-3.5):

1.

3. The carbonized slag smelting electric furnace according to claim 1, characterized in that: The isolation component is made of copper and is hollow inside, and can be cooled by water.

4. The carbonized slag smelting electric furnace according to claim 1, characterized in that: The three regions are all provided with heatable electrodes.

5. The carbonized slag smelting electric furnace according to claim 4, characterized in that: The power density of the electrode heating is 660~670kW / m 2 .

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