Steel turnings briquetting chamber with injection port

Abstract

The utility model discloses a steel scrap press cake work cavity with spout, relates to steel scrap press cake additive adding technical field. This steel scrap press cake work cavity with spout, including press work cavity, the press work cavity is used for adding steel scrap, and will steel scrap press as steel scrap press cake, a single or a plurality of spout communication has on the press work cavity, the spout is used for spouting additive to steel scrap. This steel scrap press cake work cavity with spout utilizes the mode of high pressure gas delivery powder additive, can after steel scrap adds high pressure gas with powder additive through the spout set on the wall of work cavity and spouts in steel scrap.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steel scrap briquetting additive adding technical field, concretely to a steel scrap briquetting working chamber with a jet port. BACKGROUND

[0002] When purchasing scrap steel for converter, in order to control the cost, more and more attention is paid to the raw material such as steel scrap, planer scrap, welding slag, particle steel and iron-containing slag briquetting scrap steel. The addition amount of long-process steel scrap or steel planer scrap briquetting in some steel plants is even more than 20%. Due to the reason of converter heat balance, it is difficult to further increase the scrap steel ratio.

[0003] In the electric furnace steelmaking link, considering the cost reduction, the scrap steel type in the electric furnace is mostly medium scrap and sheared scrap. The reason is that the electric furnace mainly relies on the electrode to melt the scrap steel, and the heavy scrap steel takes a long time to melt, which is high in cost. In addition, the electric furnace is relatively preferred for high-carbon materials, and the whole-process steel plant will also add a certain proportion of molten iron in the electric furnace according to the economic situation. With the reduction of molten iron ratio in the steel plant, the further improvement of scrap steel smelting ratio in the electric furnace puts forward higher challenges to the heat and time demand of the molten pool melting.

[0004] In order to improve the smelting scrap steel ratio, the previous way of adding carbon-based materials in the converter is to add powder or granular carbon in the form of injection or hopper. The addition of carbon-based materials in the electric furnace is also similar. The biggest advantage of this method is convenient operation and low cost. However, since the carbon-based materials are added in the form of bulk materials, before they enter the molten pool in the form of carburizing or burn, part of the fuel directly floats to the surface of the molten steel and is burned, thereby reducing the yield of carbon-based materials and limiting the contribution of heat in the furnace, resulting in a lot of waste.

[0005] In the steelmaking process, too much briquetting is added, in addition to insufficient heat, due to the presence of a large amount of iron oxide in the briquetting, which leads to a more intense oxidation reaction in the converter after adding more steel planer briquetting, even producing spatter and other problems affecting production and environmental protection, and also affecting the metal yield of the briquetting.

[0006] The prior art such as CN202311669832.8 a kind of steel scrap or steel planer scrap briquetting and their production method of quick melting proposes a way of adding additives to steel scrap or steel planer scrap briquetting to improve the performance of steel scrap or steel planer scrap briquetting in smelting scrap steel.

[0007] At present, in the experimental stage, the additives required by a single steel scrap or steel planer scrap briquetting can be added to the pressing bin manually or with the steel scrap or steel planer scrap into the pressing bin, but in the actual production stage, there is no efficient adding method in the prior art.

[0008] In addition, the additive is usually in the form of powder, but if the additive is not mixed with the steel scrap or the steel shavings sufficiently during the adding process, the additive powder in the pressed steel scrap or the steel shavings cake is not dispersed sufficiently, and then the performance during the subsequent smelting of the scrap steel is reduced. Content of the utility model

[0009] (1) technical problems solved

[0010] In view of the defects in the prior art, the utility model provides a steel scrap cake working cavity with a spraying port, and the following technical problems are solved:

[0011] 1. The prior art lacks an additive batch automatic adding device for the steel scrap cake with additives.

[0012] 2. The mixing of the additive and the steel scrap is not sufficient in the prior adding mode.

[0013] 3. The working cavity pressure of the steel scrap cake is large, and the installation position of the spraying port needs to be determined in the spraying adding mode.

[0014] (2) technical scheme

[0015] In order to achieve the above object, the utility model is implemented by the following technical scheme: a steel scrap cake working cavity with a spraying port, comprising a pressing working cavity, the pressing working cavity is used for adding steel scrap and pressing the steel scrap into a steel scrap cake, a single or multiple spraying pipes are communicated with the pressing working cavity, and the spraying pipes are used for spraying additives to the steel scrap.

[0016] Preferably, a feeding cavity is arranged, the feeding cavity is communicated with the pressing working cavity, and a detection port of a dust sensor is connected to one or both of the feeding cavity and the pressing working cavity.

[0017] Preferably, a feeding cavity is arranged, the feeding cavity is communicated with the pressing working cavity, and a gate valve is arranged on the feeding cavity.

[0018] Preferably, an upper pressing block is arranged at the upper end of the inner side of the pressing working cavity, and a lower pressing block is arranged at the lower end, the lower pressing block is connected with the bottom of the pressing working cavity, a hydraulic cylinder is connected to the top of the upper pressing block, and a side pressing block is arranged on the side surface of the bottom of the pressing working cavity, the upper pressing block and the lower pressing block are used for pressing in the X-axis direction of the steel scrap cake, and the side pressing block is used for pressing in the Z-axis direction of the steel scrap cake.

[0019] Preferably, the installation height of the spraying pipe is higher than the installation height of the side pressing block.

[0020] Preferably, the spraying mode of the spraying pipe adopts high-pressure gas mixed additive spraying.

[0021] (3) beneficial effects

[0022] The steel scrap cake pressing working cavity with the injection port has the following beneficial effects:

[0023] (1) The steel scrap cake pressing working cavity with the injection port uses the mode of conveying the powder additive by high-pressure gas, and can spray the high-pressure gas with the powder additive in the steel scrap through the injection port arranged on the wall of the working cavity after the steel scrap is added.

[0024] (2) The steel scrap cake pressing working cavity with the injection port is communicated with the dust detection device at the working cavity or the feeding cavity, so that the dust concentration in the working cavity or the feeding cavity can be effectively detected, and the mixing degree of the powder additive and the steel scrap is monitored.

[0025] (3) The steel scrap cake pressing working cavity with the injection port arranges the injection port in the low-pressure area of the working cavity, improves the service life of the injection port, and reduces the possibility of the injection port being blocked by the steel scrap. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The utility model structural schematic diagram.

[0027] In the drawing: 1, feeding cavity; 2, pressing working cavity; 3, injection pipe; 4, upper pressing block; 5, hydraulic cylinder; 6, lower pressing block; 7, side pressing block; 8, detection port; 9, gate valve. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0029] Embodiment 1

[0030] A steel scrap cake pressing working cavity with an injection port comprises a pressing working cavity 2, the pressing working cavity 2 is used for adding steel scrap and pressing the steel scrap into a steel scrap cake, and the pressing working cavity 2 is communicated with a single or multiple injection pipes 3, and the injection pipe 3 is used for spraying the additive to the steel scrap.

[0031] Wherein:

[0032] The feeding cavity 1 is communicated with the pressing working cavity 2, the feeding cavity 1 is provided with a gate valve 9, the gate valve 9 does not completely isolate the feeding cavity 1 from the outside world, and there is still some gap, in the case of not using a dust sensor, the injection of the additive can be carried out after the gate valve 9 is closed, and when the additive dust leaks from the gap of the gate valve 9, it indicates that the mixing of the additive and the steel chips has been completed.

[0033] The upper end of the inner side of the pressing working cavity 2 is provided with an upper pressing block 4, and the lower end is provided with a lower pressing block 6, the lower pressing block 6 is connected with the bottom of the pressing working cavity 2, the top of the upper pressing block 4 is connected with a hydraulic cylinder 5, the side of the bottom of the pressing working cavity 2 is provided with a side pressing block 7, the upper pressing block 4 and the lower pressing block 6 are used for pressing in the X-axis direction of the steel chip cake, and the side pressing block 7 is used for pressing in the Z-axis direction of the steel chip cake. The injection mode of the injection pipe 3 adopts high-pressure gas mixed additive injection.

[0034] In order to improve the service life of the injection port and avoid the injection port being blocked by the steel chips, the installation height of the injection pipe 3 is higher than the installation height of the side pressing block 7. In the specific pressing process, the side pressing block 7 is pressed after the upper pressing block 4 and the lower pressing block 6 are pressed, and the pressure of the steel chips is already high after the upper pressing block 4 and the lower pressing block 6 are pressed. Therefore, the pressing pressure of the side pressing block 7 is greater than the pressing pressure between the upper pressing block 4 and the lower pressing block 6. Therefore, the installation height of the injection pipe 3 is higher than the installation height of the side pressing block 7, which can avoid the injection pipe 3 working in a high-pressure area for a long time, thereby improving the service life and avoiding blockage. The specific improvement time is related to the material selection and installation angle of the injection port 3. Generally speaking, it is more difficult to be blocked by the steel chips if the installation angle is not perpendicular to the direction of pressing, because the steel chips are usually crushed and the steel chips are soft. If the steel chips are stuck in the injection port, the steel chips stuck in the injection port will be cut off during the pressing process. In addition, a small amount of steel chips stuck in the injection port can improve the degree of turbulence of the injection gas flow, thereby improving the mixing degree of the additive and the steel chips.

[0035] Embodiment 2

[0036] On the basis of embodiment 1, the feeding cavity 1 is communicated with the pressing working cavity 2, and one or both of the feeding cavity 1 and the pressing working cavity 2 is connected with a detection port 8 of a dust sensor. The specific dust sensor can be selected according to the component characteristics of the additive. The dust sensor is mainly used for detecting the dispersion degree of the powder additive in the pressing working cavity 2 or the feeding cavity 1. The quantitative powder additive is delivered to the pressing working cavity 2 together with the high-pressure gas. If the flow and pressure of the high-pressure gas are appropriate, the powder additive can be effectively mixed with the steel chips, and the corresponding dust parameters can also be detected by the dust sensor.

[0037] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0038] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A steel- scrap press cake working chamber with a spout, comprising a press working chamber (2) for adding steel scrap and pressing the steel scrap into a steel- scrap press cake, characterized in that: The pressing working chamber (2) is communicated with single or multiple injection pipes (3) for injecting additives into the steel chips.

2. A steel turnings briquetting work chamber with a jet according to claim 1, characterized in that: The feeding chamber (1) is communicated with the pressing working chamber (2), and one or both of the feeding chamber (1) and the pressing working chamber (2) is provided with a detection opening (8) of a dust sensor.

3. A steel turnings compacting work chamber with a jet port according to claim 1, characterized in that: The feeding chamber (1) is communicated with the pressing working chamber (2), and the feeding chamber (1) is provided with a gate valve (9).

4. A steel turnings compacting work chamber with a jet port according to claim 1, characterized in that: The upper end of the inner side of the pressing working chamber (2) is provided with an upper pressing block (4), and the lower end is provided with a lower pressing block (6) connected with the bottom of the pressing working chamber (2); the top of the upper pressing block (4) is connected with a hydraulic cylinder (5); and the side of the bottom of the pressing working chamber (2) is provided with a side pressing block (7); the upper pressing block (4) and the lower pressing block (6) are used for pressing in the X-axis direction of the steel chip cake; and the side pressing block (7) is used for pressing in the Z-axis direction of the steel chip cake.

5. A steel turnings compacting work chamber with a jet port according to claim 4, characterized in that: The installation height of the injection pipe (3) is higher than that of the side pressing block (7).

6. A steel turnings compacting work cavity with a jet port according to claim 1 wherein: The injection pipe (3) adopts a high-pressure gas mixed additive injection mode.

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