CN219266022U - Device for detecting flow property of liquid casting powder - Google Patents

Abstract

The utility model discloses a device for detecting the flow property of liquid casting powder, belonging to the technical field of steelmaking continuous casting; the device for detecting the flow performance of the liquid covering slag comprises a base body and a cover body matched with the base body, wherein the cover body covers the base body, a flow guide groove for the flow of the liquid covering slag is arranged between the cover body and the base body, the flow guide groove comprises a first flow groove formed in the cover body and a second flow groove formed in the base body, the first flow groove and the second flow groove are identical in structure and are symmetrically arranged, and a material pouring opening is formed in one end of the first flow groove; the utility model has the advantages of little influence by external environment and more accurate detection data.

Description

Device for detecting flow property of liquid casting powder

Technical Field

The utility model relates to the technical field of steelmaking continuous casting, in particular to a device for detecting the flow property of liquid casting powder.

Background

The continuous casting protecting slag is one kind of auxiliary steel-smelting functional material for covering the surface of molten steel inside the crystallizer of continuous casting machine in steel smelting process, and has the functions of heat insulating, preventing oxidation of molten steel, absorbing floating inclusion in molten steel, lubricating the relative motion between the copper plate of the crystallizer and the casting blank, controlling heat transfer, etc. and is the final technological element for controlling the surface quality of casting blank in steel smelting process.

Usually, the covering slag is mainly composed of CaO and SiO2 binary system, and is externally matched with fluxing agents such as CaF2, na2O, li2O and the like, and a small amount of components such as Al2O3, mgO and the like and other unavoidable impurities (such as Fe2O3 and MnO), so that the covering slag is a mixed inorganic silicate material. Since the melting point of the mold flux is 400-500 deg.c lower than that of the molten steel, a certain amount of carbonaceous materials such as carbon black and graphite must be added in order to control the slow melting of the relatively low melting point mold flux on the surface of the molten steel. The carbonaceous material has a very high melting point, and can effectively prevent the aggregation of the casting powder droplets, thereby effectively controlling the melting speed of the casting powder; the carbon material can be completely combusted to become gas, and the covering slag is not polluted, so that the carbon material is a cheap and practical framework material.

When the covering slag covers the surface of molten steel, a three-layer structure of a powder slag layer, a sintering layer and a liquid slag layer is formed from top to bottom, the powder slag layer mainly plays a role in heat insulation and heat preservation, the liquid slag layer is mainly used for preventing molten steel from oxidizing and absorbing floating impurities, and sufficient liquid slag is provided between a casting blank and a crystallizer copper plate gap. Under the periodic vibration action of the crystallizer, the liquid slag continuously flows into gaps between a casting blank and a copper plate, and forms a solid slag film and liquid slag film double-layer structure, the liquid slag film plays a role in lubricating, the casting blank is prevented from being pulled and cracked, the solid slag film is mainly in a glassy state or a crystalline state structure according to a morphological structure, the crystalline state structure is in a porous morphology, and the crystalline state structure have completely different heat conducting capacities, so that the solid slag film plays a key role in controlling the heat conducting capacity of the crystallizer. Once the performance of the casting powder is poor, the sufficient thickness and the sufficient consumption of the liquid slag layer cannot be ensured, so that the surface defects such as slag inclusion, cracks and the like of a casting blank can be caused, and the steel leakage accident is caused by the serious excessive blank pulling resistance. Among the five functions, the lubricating function is the most basic, and the performance index for determining the lubricating effect is mainly the fluidity of the liquid mold flux. However, the standard method for detecting the properties of the mold flux has only a melting temperature and a viscosity, and the fluidity is not uniform.

The utility model of China patent application number 201510466447.2 provides a launder which simulates the fluidity of casting powder in a gap between a casting blank and a crystallizer copper plate, and can rapidly predict the lubrication and consumption of slag in the continuous casting process. However, the launder is inclined and is of an open structure, so that the liquid mold flux can be influenced by gravity and external environment temperature when flowing in the launder, for example, the external environment temperature has a larger temperature difference between summer and winter, and the fluidity of the liquid mold flux is obviously different at different temperatures.

Disclosure of Invention

The utility model aims to solve the problem that the flow of liquid casting powder is greatly influenced by gravity and temperature when a launder in the prior art detects the fluidity of the liquid casting powder, and provides a device for detecting the flow property of the liquid casting powder.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model provides a detect liquid covering slag flow performance's device, includes the pedestal and with the supporting lid of pedestal, the lid is in on the pedestal, be provided with the guiding gutter that supplies liquid covering slag to flow between lid and the pedestal, the guiding gutter is including seting up the first flow groove on the lid and seting up the second flow groove on the pedestal, first flow groove and second flow groove structure are the same and the symmetry sets up, the one end of first flow groove is provided with the feed back mouth.

Further, the diversion trench is spiral.

Further, the material pouring opening is arranged at the center of the cover body.

Further, the pouring opening is connected with a pouring funnel.

Further, the cover body and the base body are hinged.

Further, handles are arranged on one sides of the cover body and the base body, which are far away from the pin shaft.

Further, the diversion trench is S-shaped.

Further, the diversion trench is linear.

Further, the cover body and the base body are rectangular.

Further, the cover body and the seat body are round.

Compared with the prior art, the utility model provides a device for detecting the flow property of liquid mold flux, which has the following beneficial effects:

according to the device for detecting the flow property of the liquid protection slag, the cover body is covered on the seat body to form the complete diversion trench, the liquid protection slag is poured into the diversion trench from the pouring opening, after the liquid protection slag is solidified, the flow property of the protection slag is judged according to the length of the solid protection slag, compared with the prior art, the diversion trench is small in contact area with the external environment and is in a horizontal state, so that the influence on the flow property of the liquid protection slag is smaller, and the flow property data detection result is more accurate.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows; and will be apparent to those skilled in the art in part based upon a review of the following; alternatively, the teachings may be directed to practice of the present utility model.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

In the figure:

1. a cover body; 2. a base; 3. a first flow channel; 4. a second flow channel; 5. a handle.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1, the device for detecting the flow property of liquid mold flux of the utility model comprises a base body 2 and a cover body 1 matched with the base body 2, wherein the cover body 1 and the base body 2 can be rectangular, circular, or other shapes, and the shapes are not unique;

the cover body 1 is covered on the base body 2, a diversion trench for flowing the liquid-state protective slag is arranged between the cover body 1 and the base body 2, and the diversion trench can be spiral, S-shaped, straight-line-shaped or other shapes, so that the liquid-state protective slag can flow conveniently;

the guiding gutter is including seting up the first flow groove 3 on lid 1 and seting up the second flow groove 4 on pedestal 2, first flow groove 3 and second flow groove 4 structure are the same and the symmetry sets up, first flow groove 3 and second flow groove 4 are half of the guiding gutter respectively, close together and constitute complete guiding gutter, the one end of first flow groove 3 is provided with the pouring gate, closely laminate lid 1 lid on pedestal 2, pour into liquid covering slag from the pouring gate to trench mechanism in, liquid covering slag flows in the guiding gutter, detect its mobility.

In this embodiment, the guiding gutter is spiral, and specifically, the guiding gutter is R=5mm's circular slot, has a guiding gutter on lid 1 and the pedestal 2 respectively, and tight silk is closed when merging, constitutes an annular circular slot, and annular circular slot is by six semicircle ring inscriptions of different diameter sizes to be connected and forms, from inside to outside, 1 st ring: an inner diameter of 30mm and an outer diameter of 50mm; ring 2: an inner diameter of 60mm and an outer diameter of 80mm; 3 rd ring: an inner diameter of 90mm and an outer diameter of 110mm; 4 th ring: an inner diameter of 120mm and an outer diameter of 140mm; ring 5: an inner diameter of 140mm and an outer diameter of 160mm; the second ring: the internal diameter 170mm, external diameter 190mm, compare in prior art, the overall dimension of this device obviously reduces, and the central point that sets up at lid 1 is selected to the material pouring mouth, and the whole length of guiding gutter is utilized to the maximum degree.

The pouring opening is connected with a pouring funnel, so that the liquid protection slag can be poured into the diversion trench conveniently.

The cover body 1 and the base body 2 are rotationally connected through a pin shaft or a hinge, as shown in fig. 1, so that after the cover body 1 and the base body 2 are buckled, the first flow groove 3 and the second flow groove 4 are accurately butted.

The cover body 1 and the base body 2 are provided with handles 5 on one sides far away from the pin shafts, so that the cover body 1 and the base body 2 can be conveniently opened or buckled.

Working principle: the cover body 1 is buckled with the base body 2, the equal amount of different liquid protection slag is poured into the diversion trench from the pouring hopper, after the liquid protection slag is solidified, the cover body 1 is opened, the solid protection slag is taken out, and the lengths of the different solid protection slag are compared to judge the flow performance of the solid protection slag.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (7)

1. The device for detecting the flow performance of the liquid casting powder is characterized by comprising a base body (2) and a cover body (1) matched with the base body (2), wherein the cover body (1) is covered on the base body (2), a diversion trench for flowing the liquid casting powder is arranged between the cover body (1) and the base body (2), the diversion trench comprises a first flow trench (3) formed in the cover body (1) and a second flow trench (4) formed in the base body (2), the first flow trench (3) and the second flow trench (4) are identical in structure and are symmetrically arranged, and a pouring opening is formed in one end of the first flow trench (3);

the diversion trench is spiral;

or the diversion trench is S-shaped;

or the diversion trench is linear.

2. The device for detecting the flow property of the liquid mold flux according to claim 1, wherein the pouring opening is formed at the center of the cover body (1).

3. The apparatus for detecting the flowability of liquid mold flux according to claim 2, wherein the pouring opening is connected with a pouring hopper.

4. The device for detecting the flow property of the liquid mold flux according to claim 1, wherein the cover body (1) and the base body (2) are hinged.

5. The device for detecting the flow property of the liquid mold flux according to claim 4, wherein handles (5) are arranged on one side, far away from the pin shaft, of the cover body (1) and the base body (2).

6. The device for detecting the flow property of the liquid mold flux according to claim 1, wherein the cover body (1) and the base body (2) are rectangular.

7. The device for detecting the flow property of the liquid mold flux according to claim 1, wherein the cover body (1) and the base body (2) are circular.

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