阅读说明：本技术 一种金属镁半连续精炼设备及其精炼工艺 (Semi-continuous refining equipment and refining process for magnesium metal ) 是由 郭建文 李永彦 王兆亮 卜利军 许源 尹贵忠 朱广东 于 2021-08-06 设计创作，主要内容包括：本发明公开了一种金属镁半连续精炼设备,包括镁熔炼炉、镁熔化炉、混合熔化炉、连续铸锭机和熔剂渣收集槽；其中,镁熔炼炉依次与镁熔化炉、混合熔化炉和连续铸锭机连接；熔剂渣收集槽与混合熔化炉连接。精炼工艺：(1)将镁熔炼炉中制得的粗镁进行预处理；(2)将粗镁、熔剂和萤石粉加入镁熔化炉中进行熔化；(3)加入混合熔化炉中静置分离,然后将上层的镁液加入连续铸锭机中进行铸锭,最后将下层的熔剂渣加入熔剂渣收集槽中进行循环回收再利用。本发明工艺简单,自动化程度高,产品质量稳定,杂质少,能耗低,可完全代替传统的间歇法生产工艺,是金属镁行业技术提升的有效措施。(The invention discloses semi-continuous refining equipment for magnesium metal, which comprises a magnesium smelting furnace, a magnesium melting furnace, a mixed melting furnace, a continuous ingot casting machine and a flux slag collecting tank, wherein the magnesium smelting furnace is connected with the magnesium melting furnace; wherein, the magnesium smelting furnace is connected with the magnesium melting furnace, the mixed melting furnace and the continuous ingot casting machine in sequence; the flux slag collecting tank is connected with the mixed melting furnace. The refining process comprises the following steps: (1) pretreating crude magnesium prepared in a magnesium smelting furnace; (2) adding crude magnesium, a flux and fluorite powder into a magnesium melting furnace for melting; (3) and adding the mixture into a mixed melting furnace, standing for separation, adding the magnesium liquid on the upper layer into a continuous ingot casting machine for ingot casting, and finally adding the flux slag on the lower layer into a flux slag collecting tank for recycling. The invention has simple process, high automation degree, stable product quality, less impurities and low energy consumption, can completely replace the traditional batch production process, and is an effective measure for improving the technology of the magnesium metal industry.)

1. Semi-continuous refining equipment for metal magnesium is characterized by comprising a magnesium smelting furnace, a magnesium melting furnace, a mixed melting furnace, a continuous ingot casting machine and a flux slag collecting tank;

the magnesium smelting furnace is sequentially connected with the magnesium melting furnace, the mixed melting furnace and the continuous ingot casting machine;

and the flux slag collecting tank is connected with the mixed melting furnace.

2. The semi-continuous refining apparatus of metal magnesium according to claim 1, further comprising a mixed liquor outlet controller disposed between the magnesium melting furnace and the mixed melting furnace.

3. The semi-continuous refining equipment for the magnesium metal according to claim 2, further comprising a magnesium liquid outlet controller, wherein the magnesium liquid outlet controller is arranged between the mixed melting furnace and the continuous ingot casting machine.

4. The semi-continuous refining equipment for the magnesium metal according to claim 3, further comprising an ingot level controller, wherein the ingot level controller is arranged on the continuous ingot casting machine.

5. The semi-continuous refining apparatus for magnesium metal according to claim 4, further comprising a flux slag delivery pump disposed between the mixed melting furnace and the flux slag collection tank.

6. The semi-continuous refining apparatus for magnesium metal according to claim 5, further comprising a flux slag outlet controller provided between the flux slag delivery pump and the flux slag collection tank.

7. The semi-continuous refining apparatus of metal magnesium according to claim 6, further comprising a flux slag standby outlet controller provided at the bottom of the mixing and melting furnace.

8. A refining process of the semi-continuous magnesium metal refining equipment as set forth in claim 1, which comprises the following steps:

(1) pretreating the crude magnesium prepared in the magnesium smelting furnace to obtain pretreated crude magnesium;

(2) adding the pretreated crude magnesium, the flux and the fluorite powder into a magnesium melting furnace for melting to obtain crude magnesium mixed solution;

(3) adding the crude magnesium mixed solution into a mixing melting furnace, standing for separation, adding the magnesium solution on the upper layer into a continuous ingot casting machine for ingot casting, and finally adding the flux slag on the lower layer into a flux slag collecting tank for recycling.

9. A refining process according to claim 8, wherein in step (1), the pre-treatment comprises: picking out iron pieces with slag in the crude magnesium, removing mixed material pellets carried by crude magnesium crystallization, removing oxides, nitrides and carbides bonded with the crude magnesium after burning loss, and crushing the mixture into particles with the particle size of 200-300 mm.

10. A refining process according to claim 8, characterized in that in step (2), the mass of barium chloride in the flux is 8% -12%.

Technical Field

The invention relates to the technical field of non-ferrous metal smelting, in particular to semi-continuous metal magnesium refining equipment and a refining process thereof.

Background

The magnesium metal is a novel green metal structure material, and the magnesium metal industry is vigorously developed, so that the national economic level can be obviously improved.

At present, the domestic production of metal magnesium is a Pidgeon magnesium smelting production process, crude magnesium containing more impurities is produced in the production process of a thermal reduction method, and a flux containing various chlorides is added for impurity removal and refining.

The Su Union has sufficient energy and low electricity price, and the refined magnesium obtained by adopting the continuous refining process of electric heating has higher and stable quality. In the production of metal magnesium in China, the melting equipment adopts a steel crucible heated by cheap gas for heating and melting, an intermittent operation mode, complicated processes of preheating, melting, clarifying, separating and the like of crude magnesium, the production efficiency is low, the labor intensity is high, the product quality fluctuation is large, and the quality is unstable.

Therefore, how to refine the magnesium metal is a problem that needs to be solved urgently by those skilled in the art.

Disclosure of Invention

In view of the above, the present invention aims to provide a semi-continuous magnesium metal refining apparatus and a refining process thereof, so as to solve the defects in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a semi-continuous refining device for metal magnesium comprises a magnesium smelting furnace, a magnesium melting furnace, a mixed melting furnace, a continuous ingot casting machine and a flux slag collecting tank; wherein, the magnesium smelting furnace is connected with the magnesium melting furnace, the mixed melting furnace and the continuous ingot casting machine in sequence; the flux slag collecting tank is connected with the mixed melting furnace.

The working principle of the semi-continuous magnesium metal refining equipment is as follows:

adding crude magnesium prepared in a magnesium smelting furnace into a magnesium smelting furnace for smelting, then flowing into a mixed smelting furnace with the height-diameter ratio of more than 3 for standing and separating, wherein a metal magnesium liquid with low density flows out from an upper overflow port of the mixed smelting furnace along with the increase of yield on the upper part of flux slag with high density, and enters a continuous magnesium ingot casting machine for casting ingots; and the flux slag at the lower layer of the mixed melting furnace enters a flux slag collecting tank for centralized treatment.

Further, the semi-continuous refining equipment for the metal magnesium further comprises a mixed liquid outlet controller, and the mixed liquid outlet controller is arranged between the magnesium melting furnace and the mixed melting furnace.

The mixed liquid outlet controller is used for controlling the crude magnesium mixed liquid in the magnesium melting furnace to be added into the mixing and melting furnace for standing and separating.

Further, the semi-continuous refining equipment for the magnesium metal further comprises a magnesium liquid outlet controller, and the magnesium liquid outlet controller is arranged between the mixed melting furnace and the continuous ingot casting machine.

The beneficial effect of adopting above-mentioned further technical scheme lies in, through the setting of magnesium liquid outlet control ware for the control adds the continuous ingot casting machine into with the magnesium liquid of mixing melting furnace upper strata and carries out the ingot casting.

Further, the semi-continuous refining equipment for the magnesium metal further comprises an ingot casting liquid level controller, and the ingot casting liquid level controller is arranged on the continuous ingot casting machine.

The beneficial effect of adopting the further technical scheme is that the device is used for controlling the liquid level in the continuous ingot casting machine through the arrangement of the ingot casting liquid level controller, thereby controlling the replacement of the magnesium ingot mould.

Further, the semi-continuous refining equipment for the metal magnesium further comprises a flux slag conveying pump, and the flux slag conveying pump is arranged between the mixed melting furnace and the flux slag collecting tank.

The flux slag conveying pump is used for pumping out flux slag at the lower layer of the mixing melting furnace and conveying the flux slag to the outside of the mixing melting furnace.

Further, the semi-continuous refining equipment for the metal magnesium further comprises a flux slag outlet controller, and the flux slag outlet controller is arranged between the flux slag conveying pump and the flux slag collecting tank.

The flux slag outlet controller is used for controlling the flux slag outside the mixing melting furnace to flow into the flux slag collecting tank for recycling.

Further, the semi-continuous magnesium metal refining equipment further comprises a standby flux slag outlet controller, and the standby flux slag outlet controller is arranged at the bottom of the mixing melting furnace.

The flux slag standby outlet controller is used for controlling the flux slag at the lower layer of the mixing melting furnace to be discharged, collected and processed.

The refining process of the semi-continuous magnesium metal refining equipment specifically comprises the following steps:

(1) pretreating the crude magnesium prepared in the magnesium smelting furnace to obtain pretreated crude magnesium;

(2) adding the pretreated crude magnesium, the flux and the fluorite powder into a magnesium melting furnace for melting to obtain crude magnesium mixed solution;

(3) adding the crude magnesium mixed solution into a mixing melting furnace, standing for separation, adding the magnesium solution on the upper layer into a continuous ingot casting machine for ingot casting, and finally adding the flux slag on the lower layer into a flux slag collecting tank for recycling.

Further, in the step (1), the pretreatment includes: picking out iron pieces (such as fire damper, potassium-sodium feeder, etc.) from the slag in the crude magnesium, removing mixed material pellets from the crude magnesium crystallization, removing oxides, nitrides and carbides bonded by the crude magnesium after burning loss, and crushing to a particle size of 200-300 mm.

Further, in the step (2), the mass of barium chloride in the flux is 8-12%.

According to the technical scheme, compared with the prior art, the invention has the following beneficial effects:

the invention has simple process, high automation degree, stable product quality, less impurities and low energy consumption, can completely replace the traditional batch production process, and is an effective measure for improving the technology of the magnesium metal industry.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a semi-continuous magnesium metal refining device provided by the invention.

The device comprises a 1-magnesium smelting furnace, a 2-magnesium melting furnace, a 3-mixed melting furnace, a 4-continuous ingot casting machine, a 5-flux slag collecting tank, a 6-mixed liquid outlet controller, a 7-magnesium liquid outlet controller, an 8-ingot casting liquid level controller, a 9-flux slag conveying pump, a 10-flux slag outlet controller and an 11-flux slag standby outlet controller.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The embodiment of the invention discloses semi-continuous refining equipment for magnesium metal, which comprises a magnesium smelting furnace 1, a magnesium melting furnace 2, a mixed melting furnace 3, a continuous ingot casting machine 4 and a flux slag collecting tank 5, wherein the magnesium smelting furnace 1 is connected with the mixed melting furnace 3 through a pipeline; wherein, the magnesium smelting furnace 1 is connected with a magnesium melting furnace 2, a mixed melting furnace 3 and a continuous ingot casting machine 4 in sequence; the flux slag collecting tank 5 is connected with the mixed melting furnace 3. The working principle of the semi-continuous magnesium metal refining equipment is as follows: adding crude magnesium prepared in a magnesium smelting furnace 1 into a magnesium melting furnace 2 for melting, then flowing into a mixed melting furnace 3 with the height-diameter ratio larger than 3 for standing and separation, wherein a metal magnesium liquid with low density flows out from an upper overflow port of the mixed melting furnace 3 along with the increase of yield on the upper part of flux slag with high density, and enters a continuous magnesium ingot casting machine for casting ingots; and the flux slag on the lower layer of the mixed melting furnace 3 enters a flux slag collecting tank 5 for centralized treatment.

In one embodiment, the semi-continuous magnesium metal refining apparatus further comprises a mixed liquor outlet controller 6, and the mixed liquor outlet controller 6 is disposed between the magnesium melting furnace 2 and the mixed melting furnace 3. And the mixed liquid outlet controller 6 is used for controlling the crude magnesium mixed liquid in the magnesium melting furnace 2 to be added into the mixed melting furnace 3 for standing and separation.

In one embodiment, the semi-continuous magnesium metal refining equipment further comprises a magnesium liquid outlet controller 7, and the magnesium liquid outlet controller 7 is arranged between the mixed melting furnace 3 and the continuous ingot casting machine 4. And the magnesium liquid outlet controller 7 is used for controlling the magnesium liquid on the upper layer of the mixed melting furnace 3 to be added into the continuous ingot casting machine 4 for ingot casting.

In one embodiment, the semi-continuous magnesium metal refining equipment further comprises an ingot casting level controller 8, and the ingot casting level controller 8 is arranged on the continuous ingot casting machine 4. The arrangement of the ingot casting liquid level controller 8 is used for controlling the liquid level in the continuous ingot casting machine 4, thereby controlling the replacement of the magnesium ingot mold.

In one embodiment, the semi-continuous magnesium metal refining equipment further comprises a flux slag delivery pump 9, and the flux slag delivery pump 9 is arranged between the mixed melting furnace 3 and the flux slag collecting tank 5. And the flux slag conveying pump 9 is used for pumping out the flux slag at the lower layer of the mixing and melting furnace 3 and conveying the flux slag to the outside of the mixing and melting furnace 3.

In one embodiment, the semi-continuous magnesium metal refining apparatus further includes a flux slag outlet controller 10, and the flux slag outlet controller 10 is disposed between the flux slag delivery pump 9 and the flux slag collection tank 5. And the flux slag outlet controller 10 is used for controlling the flux slag outside the mixed melting furnace 3 to flow into the flux slag collecting tank 5 for recycling.

In one embodiment, the semi-continuous magnesium metal refining apparatus further includes a flux slag standby outlet controller 11, and the flux slag standby outlet controller 11 is provided at the bottom of the mixed melting furnace 3. The flux slag standby outlet controller 11 is provided for controlling the discharge, collection and treatment of the flux slag in the lower layer of the mixing and melting furnace 3.

The embodiment of the invention also discloses a refining process of the semi-continuous magnesium metal refining equipment, which comprises the following steps:

(1) pretreating the crude magnesium prepared in the magnesium smelting furnace 1, picking out iron pieces (such as a fire damper, a potassium-sodium supply device and the like) which are included in slag in the crude magnesium, removing mixed material pellets which are brought by crude magnesium crystallization, removing oxides, nitrides and carbides which are bonded by the crude magnesium and are burnt, and crushing the mixed material pellets to the particle size of 200-300mm to obtain pretreated crude magnesium;

(2) adding the pretreated crude magnesium, a flux (the mass of barium chloride is 10%) and fluorite powder (total 100kg) into a magnesium melting furnace 2 for melting to obtain crude magnesium mixed solution;

(3) when the crude magnesium mixed liquor in the magnesium melting furnace 2 is full, starting the mixed liquor outlet controller 6, adding the crude magnesium mixed liquor into the mixed melting furnace 3, separating due to density difference, wherein the upper layer is magnesium liquor, and the lower layer is flux slag;

then discharging the magnesium liquid on the upper layer from an overflow port at the upper part of the mixed melting furnace 3 and controlled by a magnesium liquid outlet controller 7, flowing into a continuous ingot casting machine 4 for ingot casting, and controlling the replacement of a magnesium ingot mold by a liquid level controller 8 of the continuous ingot casting machine 4;

finally, pumping out the flux slag on the lower layer by using a flux slag conveying pump 9, conveying the flux slag to the outside of the mixing melting pot, and opening the flux slag to flow into a flux slag collecting tank 5 by using a flux slag outlet controller 10 for recycling; or, the flux slag is discharged and collected by the standby outlet controller 11.

According to the technical scheme, compared with the prior art, the invention has the following beneficial effects:

the invention has simple process, high automation degree, stable product quality, less impurities and low energy consumption, can completely replace the traditional batch production process, and is an effective measure for improving the technology of the magnesium metal industry.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.