Fixed high-temperature slag discharging device with monitor

Abstract

The utility model relates to a fixed high-temperature slag discharging device with a monitor, which comprises a slag runner with a U-shaped section and a concrete layer and a refractory material layer which are sequentially arranged from outside to inside; the slag tank is arranged at the outlet end of the slag runner and is connected with the outlet end of the slag runner through a flow guide device; a heat compensation insulating layer is arranged in the wall of the slag tank; the monitoring device is arranged on the inner side wall and / or the bottom of the slag trough and comprises a temperature sensor and / or a flow detection device; and the temperature sensor, the flow detection device and the heat compensation insulating layer are electrically connected with the controller. The utility model solves the problems in the prior art that the temperature and the quality are not measured in the deslagging process, the slag cooling is large and the like.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace slag treatment, specifically to a fixed high-temperature slag discharge device with a monitor. Background Technology

[0002] The high-temperature molten slag discharge from blast furnaces is intermittent, which cannot be matched with subsequent blast furnace slag treatment processes. Therefore, a molten slag buffer device is required.

[0003] The slag buffer device can achieve the following functions:

[0004] 1) Quality control: The slag can be preliminarily inspected and treated in the buffer pool, such as removing unmelted solids or adjusting the chemical composition of the slag to meet the requirements of subsequent processing.

[0005] 2) Flow balancing: There is a time difference between slag generation and slag treatment. The buffer pool can balance this time difference to ensure the continuity and stability of the production process.

[0006] 3) Safety: Blast furnace slag may be accompanied by dangers such as splashing. The buffer pool can serve as a safe isolation area to reduce operational risks.

[0007] With the intensification of blast furnace smelting and the increase in slag temperature, the operating environment of refractory materials for slag trench linings is becoming increasingly harsh, requiring frequent repairs to maintain production, thus classifying them as consumables. Summary of the Invention

[0008] The purpose of this invention is to provide a fixed high-temperature molten slag discharge device with a monitor, so as to solve the problems of lack of measurement of temperature and quality during slag discharge and large slag cooling in the existing technology.

[0009] To achieve the above objectives, the technical solution of this utility model is as follows:

[0010] A stationary high-temperature molten slag discharge device with a monitoring device, comprising:

[0011] The slag trench has a U-shaped cross-section, with a concrete layer and a refractory material layer arranged sequentially from the outside to the inside.

[0012] A slag pot is installed at the outlet end of the slag ditch and connected to the outlet end of the slag ditch via a flow guiding device; the slag pot wall is provided with a heat-replenishing and heat-insulating layer.

[0013] A monitoring device, installed on the inner wall and / or bottom of the slag ditch, includes a temperature sensor and / or a flow detection device;

[0014] The controller is electrically connected to the temperature sensor, flow detection device, and heat insulation layer.

[0015] Preferably, the heat-insulating layer is a molybdenum electrode heat-insulating layer.

[0016] Preferably, the heat-insulating layer is equipped with a temperature monitoring device and electrically connected to the controller.

[0017] Preferably, the temperature sensor is a corundum tube S-type thermocouple.

[0018] Preferably, the flow guiding device is a flow guiding groove.

[0019] Preferably, the slag pot is made of cast steel.

[0020] Preferably, the refractory material layer is formed by vibration casting in a mold, with a steel keel inside and lifting rings welded on the steel keel.

[0021] Preferably, the refractory material layer is formed by one-time casting of alumina, silicon carbide, charcoal and cement.

[0022] Preferably, a fixed support is provided under the slag ditch.

[0023] In the discharge device described in this utility model:

[0024] This invention features a monitoring device installed on the side wall of the slag ditch, which can be used to simultaneously monitor the flow rate and temperature of the high-temperature molten slag.

[0025] Among them, the temperature sensor (corundum tube S-type thermocouple) is used to measure the temperature of the high-temperature molten slag. Its hot end is in contact with the high-temperature molten slag, and its cold end is in the external environment of the device. When the high-temperature molten slag flows through the monitor, the temperature of the high-temperature molten slag can be measured and fed back to the intelligent control system of the molybdenum electrode heat-compensating insulation layer.

[0026] The flow detection device can detect the flow rate of the high-temperature molten slag when it flows through it (by multiplying the flow velocity of the high-temperature molten slag by the cross-sectional area of ​​the high-temperature molten slag and then by the density of the high-temperature molten slag, the mass flow rate of the high-temperature molten slag is obtained), and adjust the flow rate of the high-temperature molten slag according to the monitoring data. The adjusted high-temperature molten slag flows into the slag pot through the flow guiding device.

[0027] The slag pot is equipped with a heat-replenishing and insulation layer to provide heat replenishment and insulation for the high-temperature molten slag flowing into the slag pot at a relatively low temperature.

[0028] The temperature is controlled by a temperature control system, whose input signal is the temperature of the high-temperature molten slag obtained by the monitoring device.

[0029] When the temperature of the high-temperature molten slag in the slag trough is lower than the set temperature of the monitor, the molybdenum electrode heating and insulation layer starts to work, heating the high-temperature molten slag in the slag pot, thereby achieving the effect of heat preservation of the high-temperature molten slag.

[0030] Furthermore, this invention can reduce the thickness of the refractory layer in the slag trench. Because the surface temperature of the slag trench is low after slag discharge, the high-temperature molten slag can form a layer of crystals on the surface of the slag trench upon cooling, which can act as a self-bonding refractory material, thus becoming the lining material of the slag trench, reducing the amount of refractory material used and consumed. The main components of blast furnace slag are CaO, SiO2, MgO, and Al2O3, similar to those of silicate cement. Blast furnace slag forms different crystalline phases under different cooling rates, resulting in different applications. Under slow cooling conditions, blast furnace slag forms crystalline slag, mainly used for roadbed materials; while under rapid cooling conditions, it forms glassy slag with high hydration characteristics. This slag has a higher added value and is often used as an admixture in silicate cement or concrete, and also has wide applications in the construction field.

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0032] This invention measures the temperature of the high-temperature molten slag in the slag trench and feeds the measured temperature back to the control system of the slag pot's heat-replenishing and insulation layer, which can promptly replenish and insulate the high-temperature molten slag in the slag pot.

[0033] The discharge device described in this utility model can effectively utilize the detection of molten slag flow in the slag ditch to buffer slag and regulate slag flow, thereby ensuring the stability, continuity and safety of the production process.

[0034] The slag pot is designed with a heat-replenishing and insulation layer, and also has its own temperature monitoring device to monitor the temperature inside the slag pot. When the temperature of the high-temperature molten slag in the slag pot is too low, the heat-replenishing and insulation layer (molybdenum electrode) starts to work to replenish and keep the high-temperature molten slag in the slag pot warm.

[0035] In addition, this invention can also reduce the thickness of the refractory layer in the slag trench. Since the surface temperature of the slag trench is low after slag discharge, the high-temperature molten slag can form a layer of crystals on the surface of the slag trench when it cools down. This crystal can act as a self-curing refractory material, and thus become the lining material of the slag trench, reducing the amount of refractory material used and consumed. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0037] Figure 2 This is a cross-sectional schematic diagram of the slag ditch in an embodiment of this utility model. Detailed Implementation

[0038] See Figure 1 , Figure 2 The fixed high-temperature molten slag discharge device with a monitor described in this utility model includes:

[0039] Slag ditch 1 has a U-shaped cross section, with a concrete layer 11 and a refractory material layer 12 arranged sequentially from the outside to the inside.

[0040] Slag pot 2 is located at the outlet end of the slag ditch 1 and is connected to the outlet end of the slag ditch 1 through a flow guiding device 3; the slag pot 2 has a heat-replenishing and heat-insulating layer 21 inside its wall;

[0041] Monitoring device 4, installed on the inner wall and / or bottom of the slag ditch 1, includes a temperature sensor and / or a flow detection device;

[0042] The controller (not shown in the figure) is electrically connected to the temperature sensor, flow detection device, and heat insulation layer.

[0043] Preferably, the heat-insulating layer 21 is a molybdenum electrode heat-insulating layer.

[0044] Preferably, the heat-insulating layer 21 is equipped with a temperature monitoring device and electrically connected to the controller.

[0045] Preferably, the temperature sensor is a corundum tube S-type thermocouple.

[0046] Preferably, the flow guiding device 3 is a flow guiding groove.

[0047] Preferably, the slag pot 2 is made of cast steel.

[0048] Preferably, the refractory material layer 12 is formed by mold vibration casting, and a steel keel is set inside, with lifting rings 5 ​​welded on the steel keel.

[0049] Preferably, the refractory material layer 12 is formed by one-time casting of alumina, silicon carbide, carbon and cement.

[0050] Preferably, a fixed support 6 is provided under the slag ditch 1.

[0051] The flow guiding device directs the high-temperature molten slag flowing in the slag channel into a slag pot containing the high-temperature molten slag. The aforementioned heat-replenishing and insulation layer surrounds the slag pot, providing heat replenishment for the relatively low-temperature molten slag flowing into the pot and maintaining its temperature. The aforementioned monitoring device simultaneously monitors the flow rate and temperature of the high-temperature molten slag.

[0052] When the temperature of the high-temperature molten slag in the slag trough is lower than the set temperature of the monitor, the (molybdenum electrode) heat-replenishing and insulation layer starts to work, replenishing the heat of the high-temperature molten slag in the slag pot, thereby achieving the effect of heat preservation of the high-temperature molten slag.

Claims

1. A fixed high temperature molten slag discharge apparatus with a monitor, characterized by, The application relates to a slag channel and a slag tank. The slag channel is of a U-shaped section, and a concrete layer and a refractory material layer are arranged in the slag channel from outside to inside. The slag tank is arranged at the outlet end of the slag channel and is connected to the outlet end of the slag channel through a flow guide device. A heat supplementing and heat preserving layer is arranged in the tank wall of the slag tank. A monitoring device is arranged on the inner wall and / or the bottom of the slag channel, and the monitoring device comprises a temperature sensor and / or a flow detection device.

2. The fixed high temperature molten slag tapping device with a monitor according to claim 1, wherein A controller is electrically connected to the temperature sensor, the flow detection device and the heat supplementing and heat preserving layer.

3. A fixed high temperature molten slag tapping device with a monitor according to claim 1 or 2, characterized in that, The heat supplementing and heat preserving layer is a molybdenum electrode heat supplementing and heat preserving layer.

4. The fixed high temperature molten slag tapping device with a monitor according to claim 1, wherein The heat supplementing and heat preserving layer is provided with a temperature monitoring device and is electrically connected to the controller.

5. The fixed high temperature molten slag tapping device with a monitor according to claim 1, wherein The temperature sensor is an S-shaped thermocouple.

6. The fixed high temperature molten slag tapping device with a monitor according to claim 1, wherein The flow guide device is a flow guide groove.

7. The fixed high temperature molten slag tapping device with a monitor according to claim 1, wherein The slag tank is made of cast steel.

8. The fixed high temperature molten slag tapping device with a monitor according to claim 1, wherein The refractory material layer is formed through mold vibration pouring, and a steel bar keel is arranged in the refractory material layer, and a hoisting ring is welded on the steel bar keel. Fixed supports are arranged under the slag channel.

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