CN217111212U - Device for preventing molten iron of high-titanium slag closed electric furnace from penetrating into furnace - Google Patents

Abstract

The utility model discloses a device for preventing molten iron of a high titanium slag airtight electric furnace from penetrating the furnace, which belongs to the technical field of chemical production. The utility model discloses a set up several temperature sensor in the oven around the iron notch of arranging of high titanium slag airtight electric stove and with the controller that temperature sensor connects, temperature sensor uses the iron notch of arranging as two-layer arranging in center, and the contained angle between the adjacent temperature sensor is 45, and first layer temperature sensor is 20cm ~ 30cm with the distance of arranging the iron notch wall, and the distance of second floor temperature sensor and row iron notch wall is 50cm ~ 80 cm. The utility model discloses a temperature sensor's monitoring data judges the integrality on firebrick layer and the molten iron invasion condition to take the cooling measure to prevent that the molten iron from continuing to erode firebrick, thereby prevent to take place to wear the stove accident.

Description

Device for preventing molten iron of high-titanium slag closed electric furnace from penetrating into furnace

Technical Field

The utility model belongs to the technical field of chemical production, concretely relates to device of airtight electric stove molten iron of prevention high titanium sediment wears stove.

Background

The high titanium slag is a titanium ore enrichment substance formed through a chemical reaction process, the titanium ore is heated and melted through an electric furnace, titanium concentrate is smelted through the electric furnace, titanium oxide in the titanium concentrate and a reducing agent (coke, anthracite and semi-coke) are subjected to chemical reaction to generate TiO2, slag and iron are separated due to different specific gravities to obtain a titanium-rich material (titanium slag), the high titanium slag is neither waste slag nor a byproduct, and the high titanium slag is a raw material of titanium tetrachloride. The high titanium slag produced by the electric furnace needs to be subjected to the working procedures of crushing, grinding, grading and the like to produce the high titanium slag with qualified grain size and the fine acid slag.

In the production process of the high titanium slag, the temperature of the high titanium slag and the molten iron in a molten state can reach about 1700 ℃, and the refractory bricks need to keep integrity at high temperature, so that molten iron infiltration caused by crack generation is avoided to damage a furnace shell, and furnace penetration is prevented. The refractory bricks are mechanically washed and chemically corroded by flowing molten iron at the iron discharging port and have large temperature change. The refractory bricks are easily damaged to generate gaps, so that molten iron flows into the furnace and risks penetrating the furnace.

In the prior art, thermocouple temperature sensors (hereinafter referred to as thermocouples) are uniformly arranged on an electric furnace in the transverse and longitudinal directions so as to detect the temperature change of each monitoring point. The integrity of the refractory bricks in the furnace can be reflected by the temperature changes at each point. If infiltration molten iron or high titanium sediment can arouse the rising of local firebrick temperature in the damaged gap of firebrick, otherwise can pass through the thermocouple temperature and detect firebrick integrality, prevent that the molten iron from wearing the stove. During the production process, the furnace penetration is mainly near the taphole, and the reasons are that the mechanical scouring and chemical corrosion of the refractory bricks caused by molten iron discharge and the large temperature difference caused by the temperature reduction after tapping at the taphole lead the refractory bricks to be easy to crack. In production, thermocouple arrangement near the taphole is not specially arranged, so that a monitoring blind area is possible to appear, and the risk of molten iron penetrating through the furnace is caused.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides a device that stove was worn to airtight electric stove molten iron of prevention high titanium sediment, its aim at: by adding the thermocouple temperature sensor near the taphole which is easy to cause the furnace penetration accident and optimizing the arrangement of the thermocouples, the temperature change of the refractory bricks is accurately monitored, the molten iron erosion parts of the refractory bricks are accurately reflected, the temperature monitoring blind area of the refractory bricks is eliminated, the refractory bricks are prevented from being deeply eroded by molten iron and contacting the outer shell of the electric furnace, and the effect of preventing the molten iron penetration of the high-titanium slag closed electric furnace is achieved.

The utility model adopts the technical scheme as follows:

the utility model provides a device that prevention airtight electric stove molten iron of high titanium sediment was worn stove, including set up several temperature sensor and with the controller that temperature sensor connects in the oven around the iron notch of the airtight electric stove of high titanium sediment, temperature sensor uses the iron notch of arranging as two-layer arranging in the center, and the contained angle between the adjacent temperature sensor is 45, and the distance of first layer temperature sensor and iron notch wall is 20cm ~ 30cm, and the distance of second floor temperature sensor and iron notch wall is 50cm ~ 80 cm.

After the technical scheme is adopted, when the temperature change of a single temperature sensor is monitored to exceed 400 ℃, and the temperature change of the surrounding temperature sensors does not exceed 200 ℃, the molten iron invasion point can be judged to be at the temperature sensor; when the temperature changes of two or three adjacent temperature sensors are monitored to exceed 200 ℃ and not exceed 400 ℃, the molten iron intrusion position can be judged to be near the centers of the two or three points; therefore, the condition that the molten iron invades into the refractory bricks can be judged through the temperature change of each thermocouple, and the occurrence of the accident that the molten iron penetrates through the furnace is prevented.

Furthermore, the number of the first layer of temperature sensors is 8, and the first layer of temperature sensors are uniformly distributed around the iron discharging opening; the quantity of second floor temperature sensor is 10, and wherein the below of arranging the iron notch is provided with 4, and the both sides and the top of arranging the iron notch are provided with 2 respectively.

After adopting this preferred scheme, because the iron notch bottom compare with upper portion and both sides bear the pressure bigger, the machinery that receives erodees stronger, easily cause the molten iron to invade resistant firebrick more, cause and wear the stove hidden danger, set up like this and can carry out key control to iron notch bottom, further avoid the molten iron to wear the stove occurence of failure.

Furthermore, the temperature sensor is a thermocouple, the furnace wall of the high titanium slag sealed electric furnace is built by refractory bricks, and the thermocouple is embedded into 3/5 of the thickness of the furnace wall.

After the optimal scheme is adopted, the temperature condition of the refractory bricks on the furnace wall can be accurately reflected, and the thermocouple can be protected from being contacted with the invading molten iron to damage the thermocouple.

Furthermore, the furnace also comprises a cooling device arranged outside the furnace wall, wherein the cooling device is connected with the controller, and the cooling device corresponds to the temperature sensor.

After adopting this preferred scheme, each temperature sensor feeds back real-time data to the controller, and when the controller judged that certain region was overtemperature, the cooling device of controller control relevant position cooled down this region to realize cooling down the region that the hot metal invaded resistant firebrick automatically, avoid the hot metal to wear the stove occurence of failure.

Furthermore, the cooling device is a water-cooling spraying device which comprises a cooling water pipe and a plurality of spray heads arranged on the cooling water pipe, and the cooling water pipe and the spray heads are positioned outside the furnace wall and correspond to the temperature sensor.

After the preferred scheme is adopted, when the controller judges that a certain area is over-temperature, the controller automatically controls the spray heads adjacent to the area to spray water to cool the furnace wall or manually controls the spray cooling, so that the automatic cooling is realized. The molten iron is prevented from continuously eroding the refractory bricks, and the furnace penetration accident is prevented.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses a temperature sensor's monitoring data judges the integrality on firebrick layer and the molten iron invasion condition to take the cooling measure to prevent that the molten iron from continuing to erode firebrick, prevent to take place to wear the stove accident. When the temperature change of a single temperature sensor is monitored to exceed 400 ℃, and the temperature change of the ambient temperature sensor does not exceed 200 ℃, the molten iron invasion point can be judged to be at the temperature sensor; when the temperature changes of two or three adjacent temperature sensors are monitored to exceed 200 ℃ and not exceed 400 ℃, the molten iron intrusion position can be judged to be near the centers of the two or three points; therefore, the condition that the molten iron invades into the refractory bricks can be judged through the temperature change of each thermocouple, and the occurrence of the accident that the molten iron penetrates through the furnace is prevented.

2. The below of iron notch is provided with 4 temperature sensor, sets up like this and to carry out key control to iron notch bottom, further avoids the molten iron to wear the stove occurence of failure.

3. The thermocouple is embedded into 3/5 with the thickness of the furnace wall, so that the temperature condition of the refractory bricks of the furnace wall can be accurately reflected, and the thermocouple can be protected from being contacted with intruding molten iron to damage the thermocouple.

4. Each temperature sensor feeds back real-time data to the controller, and when the controller judged that certain region was overtemperature, the heat sink of controller control relevant position cooled down this region, prevented that the molten iron from continuing to erode resistant firebrick to the realization is automatic to the regional cooling of resistant firebrick of molten iron invasion, avoids the molten iron to wear the stove occurence of failure.

Drawings

The invention will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a diagram of a thermocouple arrangement around a taphole;

FIG. 2 is a schematic view of a thermocouple embedded in a refractory brick.

Reference numerals: 1-iron notch, 2-thermocouple, 3-refractory brick layer, 4-thermocouple transmission line, 5-cooling water pipe and 6-spray head.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

The present invention will be described in detail with reference to fig. 1 and 2.

The device for preventing molten iron of the high-titanium slag sealed electric furnace from penetrating through the furnace comprises a plurality of temperature sensors arranged in a furnace wall around an iron discharging port of the high-titanium slag sealed electric furnace and a controller (not shown in the figure) connected with the temperature sensors, wherein the temperature sensors are arranged in two layers by taking the iron discharging port as a center, included angles between the adjacent temperature sensors are 45 degrees, the distance between the first layer of temperature sensors and the wall of the iron discharging port is 20 cm-30 cm, and the distance between the second layer of temperature sensors and the wall of the iron discharging port is 50 cm-80 cm. In this embodiment, the controller is a PLC controller commonly used in the prior art.

As shown in fig. 1, the number of the first layer of temperature sensors is 8, and the first layer of temperature sensors are uniformly distributed around the taphole; the quantity of second floor temperature sensor is 10, and wherein the below of arranging the iron notch is provided with 4, and the both sides and the top of arranging the iron notch are provided with 2 respectively.

As shown in FIG. 2, in the present embodiment, the temperature sensor is a thermocouple 2, the furnace wall of the high titanium slag sealed electric furnace is a refractory brick layer 3, and the thermocouple 3 is embedded in 3/5 of the thickness of the refractory brick layer 3.

The utility model discloses still including setting up the heat sink in the oven outside, the heat sink is connected with the controller, just the heat sink corresponds with temperature sensor's position.

In this embodiment, the heat sink is water-cooling spray set, water-cooling spray set includes several condenser tube 4 of being connected with the water pump, sets up several shower nozzle 5 on every condenser tube 4, is provided with the valve on every condenser tube 4, condenser tube 4 and shower nozzle 5 are located the oven outside and correspond with temperature sensor's position, guarantee that every condenser tube 4 can be cooled down to an area of oven alone.

The control program involved in the present invention can be realized by those skilled in the art according to the same or similar principle of the existing program, and the control program is not the innovation of the present invention.

The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.

Claims (5)

1. The device for preventing molten iron of the high-titanium-slag sealed electric furnace from penetrating through the furnace is characterized by comprising a plurality of temperature sensors arranged in the furnace wall around an iron discharging port of the high-titanium-slag sealed electric furnace and a controller connected with the temperature sensors, wherein the temperature sensors are arranged in two layers by taking the iron discharging port as the center, the included angle between every two adjacent temperature sensors is 45 degrees, the distance between the first layer of temperature sensors and the wall of the iron discharging port is 20 cm-30 cm, and the distance between the second layer of temperature sensors and the wall of the iron discharging port is 50 cm-80 cm.

2. The device for preventing the molten iron from penetrating into the high titanium slag closed electric furnace according to claim 1, wherein the number of the first layer of temperature sensors is 8 and the first layer of temperature sensors are uniformly distributed around the iron discharging opening; the quantity of second floor temperature sensor is 10, and wherein the below of arranging the iron notch is provided with 4, and the both sides and the top of arranging the iron notch are provided with 2 respectively.

3. The apparatus according to claim 1, wherein the temperature sensor is a thermocouple, the furnace wall of the high titanium slag sealed electric furnace is built by refractory bricks, and the thermocouple is embedded in 3/5 of the thickness of the furnace wall.

4. The device for preventing the molten iron of the high titanium slag sealed electric furnace from penetrating through the furnace as claimed in claim 1, further comprising a cooling device arranged outside the furnace wall, wherein the cooling device is connected with the controller, and the cooling device corresponds to the temperature sensor.

5. The device for preventing the molten iron from penetrating through the high titanium slag closed electric furnace according to claim 4, wherein the cooling device is a water-cooling spraying device, the water-cooling spraying device comprises a cooling water pipe and a plurality of spray heads arranged on the cooling water pipe, and the cooling water pipe and the spray heads are positioned on the outer side of the furnace wall and correspond to the position of the temperature sensor.

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