Rugby-ball-like magnesium ball forming method

Abstract

The invention provides a rugby-like magnesium block material forming method, and belongs to the technical field of magnesium block material smelting. Comprising the following steps: step 1, establishing a first cross section equation # imgabs0 # of a rugby-like magnesium pellet material; step 2, establishing a second cross section equation # imgabs1 # of the rugby-like magnesium pellet material; step 3, establishing a third cross section equation # imgabs2 # of the rugby-like magnesium pellet material; step 4, taking any two groups in the first cross section equation, the second cross section equation and the third cross section equation as lofting tracks, the other group is a lofting surface for lofting; and preparing a flat pressing mold in a simulated manner, and pressing the rugby-like magnesium pellet material in a rugby-like shape by using the pressing mold. The rugby-like magnesium ball material is used for preparing magnesium, the powder rate is low, the material-to-magnesium ratio is low, the content of magnesium oxide in residues is low, the magnesium preparation efficiency can be greatly improved, and the economic benefit is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of magnesium agglomerate refining, and in particular relates to a method for forming a rugby-shaped magnesium agglomerate. Background Art

[0002] In the Pijiang process of magnesium smelting, dolomite is mainly calcined at 1200 degrees in a rotary kiln, and then mixed with ferrosilicon as a reducing agent and fluorite powder as a catalyst. After mixing according to a certain raw material ratio, the magnesium agglomerate is pressed into magnesium agglomerates, and then the magnesium agglomerates are placed in a reduction tank at a high temperature of 1180-1200°C to participate in a reduction reaction under vacuum (1-10Pa). After the magnesium vapor reacts and escapes from the agglomerates, the magnesium is condensed in a horizontal tank, and the magnesium vapor moves to the collector of the cooling water jacket of the reduction tank to crystallize and solidify into crude magnesium with a content of 98%.

[0003] In the process of pressing magnesium agglomerates, if the magnesium agglomerates are pressed into strips, the strips will break and shatter during the pressing and transportation process, and more magnesium powder will be produced. The powder rate of the formed magnesium agglomerates is high. The strips of magnesium agglomerates with more magnesium powder are added to the metal reduction tank. Since the magnesium powder is tightly filled in the metal reduction tank, there is a lack of gas flow cavity, which is not conducive to the escape of magnesium vapor. The magnesium content in the residue after reduction is high, and the magnesium production efficiency is low. If the magnesium agglomerates are pressed into squares, although less magnesium powder is produced during the pressing and transportation of the square magnesium agglomerates, the square magnesium agglomerates are added. When the magnesium agglomerates are put into the metal reduction tank, the magnesium vapor inside the square magnesium agglomerates is not easy to escape, the magnesium content in the residue after reduction is high, and the magnesium production efficiency is low; if the magnesium agglomerates are pressed into spheres, although the spherical magnesium agglomerates produce less magnesium powder during the pressing and transportation process, the spherical magnesium agglomerates are still added to the metal reduction tank, the magnesium vapor inside the spherical magnesium agglomerates is not easy to escape, the magnesium content in the residue after reduction is high, and the magnesium production efficiency is low; therefore, no matter they are pressed into strip magnesium agglomerates, square magnesium agglomerates or spherical magnesium agglomerates, the magnesium vapor is not easy to escape, the magnesium content in the residue after reduction is high, and the magnesium production efficiency is low. Summary of the invention

[0004] Based on this, the present invention provides a method for forming a rugby-shaped magnesium agglomerate to solve the technical problems in the prior art that, regardless of being pressed into strip-shaped magnesium agglomerates, square-shaped magnesium agglomerates or spherical magnesium agglomerates, magnesium vapor is difficult to escape, the magnesium content in the reduced residue is high, and the magnesium production efficiency is low.

[0005] The technical solution of the present invention to solve the above technical problems is as follows:

[0006] A method for forming a rugby-shaped magnesium mass, comprising:

[0007] Step 1: Establish the first cross-section equation of the football-like magnesium mass Wherein, a represents the distance from the center point along the x-axis direction of the first cross section, and b represents the distance from the center point along the y-axis direction of the first cross section. The interval of a is set to [3, 5], and the interval of b is set to [1.5, 2].

[0008] Step 2: Establish the second cross-section equation of the football-like magnesium mass Wherein, a represents the distance from the center point along the x-axis direction of the second cross section, and c represents the distance from the center point along the z-axis direction of the second cross section. The interval of a is set to [3, 5], and the interval of c is set to [0.8, 1];

[0009] Step 3: Establish the third cross-section equation of the football-like magnesium mass Wherein, b represents the distance from the center point in the third cross section along the x-axis direction, and c represents the distance from the center point in the third cross section along the z-axis direction. The interval of b is set to [1.5, 2], and the interval of c is set to [0.8, 1];

[0010] Step 4: Use any two of the first cross-sectional equation, the second cross-sectional equation and the third cross-sectional equation as the lofting trajectory and the other group as the lofting surface for lofting; simulate the preparation of a flat pressing mold, and use the pressing mold to press a rugby-shaped magnesium mass.

[0011] Preferably, a is 3, b is 1.5, and c is 0.8.

[0012] Preferably, a is 4, b is 1.75, and c is 0.9.

[0013] Preferably, a is 5, b is 2, and c is 1.

[0014] Compared with the prior art, the present invention has at least the following advantages:

[0015] (1) The powder rate of the football-shaped magnesium agglomerate is less than the powder rate of the spherical magnesium agglomerate, less than the powder rate of the square magnesium agglomerate, and less than the powder rate of the strip magnesium agglomerate. The powder rate of the football-shaped magnesium agglomerate is much smaller than the powder rate of the spherical magnesium agglomerate, the powder rate of the square magnesium agglomerate, or the powder rate of the strip magnesium agglomerate. This indicates that less powder is generated after the football-shaped magnesium agglomerate is pressed and transported. When the football-shaped magnesium agglomerate is added to the reduction tank, the magnesium powder will not fill the flow cavity in the reduction tank, which is more conducive to the flow of magnesium vapor in the flow cavity, and is convenient for the precipitation and crystallization of magnesium vapor.

[0016] (2) The magnesium ratio of the football-shaped magnesium agglomerate is less than the magnesium ratio of the spherical magnesium agglomerate, less than the magnesium ratio of the square magnesium agglomerate, and less than the magnesium ratio of the bar-shaped magnesium agglomerate. Moreover, the magnesium ratio of the football-shaped magnesium agglomerate is much smaller than the magnesium ratio of the spherical magnesium agglomerate, the magnesium ratio of the square magnesium agglomerate, or the magnesium ratio of the bar-shaped magnesium agglomerate. This indicates that the reduced magnesium vapor is more conducive to flowing out of the football-shaped magnesium agglomerate, crystallizing to produce more crude magnesium, and the reduced magnesium is in an optimal state.

[0017] (3) The residual magnesium oxide content of the football-like magnesium agglomerates is less than the residual magnesium oxide content of the spherical magnesium agglomerates, less than the residual magnesium oxide content of the square magnesium agglomerates, and less than the residual magnesium oxide content of the strip-shaped magnesium agglomerates. The residual magnesium oxide content of the football-like magnesium agglomerates is much lower than that of the spherical magnesium agglomerates, the square magnesium agglomerates, or the strip-shaped magnesium agglomerates. The magnesium oxide content in the residue after reduction is low, which further indicates that the reduced magnesium content in the football-like magnesium agglomerates is relatively high.

[0018] (4) The use of the second type of rugby magnesium agglomerates to produce magnesium is better than the first type of rugby magnesium agglomerates and the second type of rugby magnesium agglomerates. The powder rate, material-magnesium ratio, and magnesium oxide content in the residue of the second type of rugby magnesium agglomerates are lower than those of the first type of rugby magnesium agglomerates or the second type of rugby magnesium agglomerates.

[0019] Therefore, by producing magnesium from rugby-like magnesium lumps, the powder rate is low, the material-magnesium ratio is low, and the magnesium oxide content in the residue is low, which can greatly improve the efficiency of magnesium production and increase economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the lines of a rugby-like magnesium mass.

[0021] Figure 2 This is a first cross-sectional schematic diagram of a football-like magnesium agglomerate.

[0022] Figure 3 This is a second cross-sectional schematic diagram of a rugby-like magnesium agglomerate.

[0023] Figure 4 This is a schematic diagram of the third cross section of a rugby-shaped magnesium agglomerate.

[0024] In the figure: a rugby-like magnesium mass 100 , a first cross section 110 , a second cross section 120 , and a third cross section 130 . DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The technical solution of the present invention will be further described below in conjunction with the drawings of the embodiments of the present invention, and the present invention is not limited to the following specific implementation methods.

[0026] It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present invention, it should be understood that if the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] Please see Figure 1 A method for forming a rugby-shaped magnesium mass, comprising:

[0028] Step 1: See Figure 2 , establish the first cross-sectional equation of the rugby-like magnesium mass 100 Wherein, a represents the distance from the center point along the x-axis direction of the first cross section, and b represents the distance from the center point along the y-axis direction of the first cross section. The interval of a is set to [3, 5], and the interval of b is set to [1.5, 2].

[0029] Step 2: See Figure 3 , establish the second cross-sectional equation of the rugby-like magnesium mass 100 Wherein, a represents the distance from the center point along the x-axis direction of the second cross section, and c represents the distance from the center point along the z-axis direction of the second cross section. The interval of a is set to [3, 5], and the interval of c is set to [0.8, 1];

[0030] Step 3: See Figure 4 , establish the third cross-sectional equation of the rugby-like magnesium mass 100 Wherein, b represents the distance from the center point in the third cross section along the x-axis direction, and c represents the distance from the center point in the third cross section along the z-axis direction. The interval of b is set to [1.5, 2], and the interval of c is set to [0.8, 1];

[0031] Step 4: Use any two of the first cross-sectional equation, the second cross-sectional equation and the third cross-sectional equation as lofting trajectories and the other as lofting surfaces for lofting; simulate the preparation of a flat pressing mold, and use the pressing mold to press the rugby-shaped magnesium mass 100.

[0032] Specifically, in step 4: Method 1: Use the first cross-section equation and the second cross-section equation as the lofting trajectory, and use the third cross-section equation as the lofting surface to perform lofting.

[0033] Method 2: Use the second cross-section equation and the third cross-section equation as the lofting trajectory and the first cross-section equation as the lofting surface for lofting;

[0034] Method three: Use the first cross-section equation and the third cross-section equation as the lofting trajectory and the second cross-section equation as the lofting surface for lofting.

[0035] Furthermore, a is 3, b is 1.5, and c is 0.8; that is, the first cross-sectional equation is Second cross-section equation The third cross-section equation The first cross-sectional equation and the second cross-sectional equation are used as lofting trajectories and the third cross-sectional equation is used as a lofting surface to simulate the preparation of a flat pressing mold, and the pressing mold is used to press the rugby-like magnesium mass 100 in a rugby-like shape.

[0036] Furthermore, a is 4, b is 1.75, and c is 0.9; that is, the first cross-sectional equation is Second cross-section equation The third cross-section equation The first cross-sectional equation and the second cross-sectional equation are used as lofting trajectories and the third cross-sectional equation is used as a lofting surface to simulate the preparation of a flat pressing mold, and the pressing mold is used to press the rugby-like magnesium mass 100 in a rugby-like shape.

[0037] Furthermore, a is 5, b is 2, and c is 1; that is, the first cross-sectional equation is Second cross-section equation The third cross-section equation The first cross-sectional equation and the second cross-sectional equation are used as lofting trajectories and the third cross-sectional equation is used as a lofting surface to simulate the preparation of a flat pressing mold, and the pressing mold is used to press the rugby-like magnesium mass 100 in a rugby-like shape.

[0038] Pre-treatment

[0039] 1. Screening: Screen the dolomite to remove impurities and small particles of dolomite. The screened dolomite is passed into the silo, and then the dolomite in the silo is transported by a large-angle belt and enters the preheating chamber;

[0040] 2. Calcination: Mix dolomite and coal powder and add them into a rotary kiln, heat them to 1250℃±50℃, decompose calcium carbonate and magnesium carbonate (CaCO3, MgCO3) in the dolomite into calcium oxide and magnesium oxide (CaO, MgO), and calcine the dolomite in the rotary kiln until it matures;

[0041] 3. Enter the calcined ore bin, rotate through the rotary kiln itself to the single cooler, and after cooling, it is lifted by the bucket elevator into the calcined ore bin. The calcined ore products in the calcined ore bin are (CaO, MgO);

[0042] 4. Ball milling: add calcined white (CaO, MgO), fluorite powder and ferrosilicon powder into a batching machine according to a preset ratio and mix them to form a mixture, and then add the mixture into a ball mill to form a mixed powder;

[0043] dolomite Calcined White Ferrosilicon Fluorite powder Ratio 200％ 83.0％ 16.0％ 1.0％ Quantity (tons) 10.846 5.4232 1.0454 0.0653

[0044] 5. Distribute the powder, extract a certain amount of mixed powder, and measure it into 1 t portions, namely, the first mixed powder, the second mixed powder, the third mixed powder, and the fourth mixed powder.

[0045] Embodiment 1:

[0046] Determination of powder rate, material-magnesium ratio and residual magnesium oxide content of magnesium strip pellets

[0047] Pressing: take the first mixed powder (1 t) and divide it into two portions, each weighing 500 kg, and add them into the powder elevator one by one. Scrape the first mixed powder in the powder elevator into the strip pressing machine through a powder scraper and press it into strip-shaped magnesium agglomerates. The volume of the strip-shaped magnesium agglomerates is length × width × height = 5 cm × 3 cm × 1 cm. Collect the prepared strip-shaped magnesium agglomerates into a receiving vehicle, and collect 500 kg of strip-shaped magnesium agglomerates in each receiving vehicle. The first mixed powder that has not been pressed into shape enters the powder elevator again through the return screw for secondary pressing until all 1 t of the first mixed powder is pressed into strip-shaped magnesium agglomerates and filled into two receiving vehicles with strip-shaped magnesium agglomerates.

[0048] Material delivery: After the preparation of the magnesium bar mass is completed, the magnesium bar mass needs to be delivered from the calcination process to the reduction process and transported by a receiving vehicle. Therefore, the delivery is simulated. The simulation condition is that 500 kg of magnesium bar mass is transported by a receiving vehicle, and the transportation distance is 1 km (simulating the delivery from the calcination process to the reduction process). A total of two transportations are carried out by the receiving vehicle, 500 kg each time, and a total of 1 t is transported;

[0049] Powder rate: Detect the total powder rate in the magnesium bar mass after pressing and transportation (the powder rate specifically refers to: press 1t of the first mixed powder, and then select the complete magnesium bar mass in the receiving vehicle after transportation. After selection, the remaining magnesium bar mass in the receiving vehicle is identified as powder, weigh the powder weight of the magnesium bar mass, and then calculate the powder rate. The specific calculation method is: powder rate = powder weight / magnesium bar mass weight). See the table below for specific powder rates:

[0050] Magnesium bar mass weight kg Powder weight kg Magnesium strip pellet powder rate % First receiving car 500 121.5 24.31％ First receiving car 500 110.6 22.12％

[0051] The average powder rate of the strip magnesium agglomerate is:

[0052] (24.31%+22.12%) / 2=23.22%

[0053] Reduction: Add the strip magnesium agglomerates in the first receiving car and the second receiving car into the reduction furnace. There are a number of reduction tanks in the reduction furnace. The strip magnesium agglomerates are evenly filled in the reduction tanks. After heating, the magnesium in the strip magnesium agglomerates is reduced to form magnesium vapor, which precipitates from the strip magnesium agglomerates. With the movement of magnesium vapor, it flows through the water cooling system. After cooling, the magnesium vapor turns into crystals. The crystallization position is located in the crystallization barrel in the reduction tank. After the reduction is completed, the crystallization barrel is pulled out of the reduction tank, and waits for cooling. The crystals in the crystallization barrel are taken out, which are crude magnesium.

[0054] Slag scraping: Use the slag scraping tool to reach into the reduction tank and scrape out the remaining reduction slag in the reduction tank.

[0055] Material-magnesium ratio: Take out all the crude magnesium after the reduction of the strip magnesium pellets and calculate the material-magnesium ratio (the material-magnesium ratio specifically refers to the mass ratio of the magnesium pellets to the crude magnesium output, which is used to measure the reduction efficiency of magnesium in the reduction process. The specific calculation method is: material-magnesium ratio = magnesium pellets / crude magnesium). The specific material-magnesium ratio is shown in the table below:

[0056] Magnesium bar mass weight kg Weight of crude magnesium (kg) Material magnesium ratio First receiving car 500 69.44 7.20 First receiving car 500 70.22 7.12

[0057] The average magnesium ratio of the strip magnesium pellets is:

[0058] (7.20+7.12) / 2=7.16

[0059] Residue magnesium oxide content: Collect the reduction slag, wait for it to cool, and then measure the residue magnesium oxide content according to the "EDTA complexometric titration method" (by dissolving the sample with hydrochloric acid, using triethanolamine to eliminate the influence of interfering ions such as iron and aluminum, and titrating with EDTA standard solution under specific conditions, and calculating the magnesium oxide content based on the volume of the consumed EDTA standard solution); the specific residue magnesium oxide content is shown in the following table:

[0060] Residue magnesium oxide content % First receiving car 5.142 First receiving car 5.084

[0061] The average residual magnesium oxide content of the strip magnesium agglomerate is:

[0062] (5.142%+5.084%) / 2=5.133%

[0063] Example 2

[0064] Determination of powder rate, material-magnesium ratio and residual magnesium oxide content of square magnesium pellets

[0065] Pressing: Take the second mixed powder (1 t) and divide it into two portions, each weighing 500 kg. Add them into the powder elevator one by one. Scrape the first mixed powder in the powder elevator into the square pressing machine through a powder scraper and press it into square magnesium agglomerates. The volume of the square magnesium agglomerates is length × width × height = 2.5 cm × 2.5 cm × 2.5 cm. Collect the prepared square magnesium agglomerates into a receiving vehicle, and collect 500 kg of square magnesium agglomerates in each receiving vehicle. The second mixed powder that has not been pressed into shape enters the powder elevator again through the return screw for secondary pressing until all 1 t of the second mixed powder is pressed into square magnesium agglomerates and filled into two receiving vehicles with square magnesium agglomerates.

[0066] Material delivery: After the square magnesium agglomerates are prepared, they need to be delivered from the calcination process to the reduction process and transported by a receiving vehicle. Therefore, the delivery is simulated. The simulation condition is that 500 kg of square magnesium agglomerates are transported by a receiving vehicle with a transportation distance of 1 km (simulating the delivery from the calcination process to the reduction process). A total of two transportations are carried out by the receiving vehicle, 500 kg each time, and a total of 1 t is transported.

[0067] Powder rate: Detect the total powder rate in the square magnesium mass after pressing and transportation (the powder rate specifically refers to: press 1t of the second mixed powder, and then select the complete square magnesium mass in the receiving vehicle after transportation. After selection, the remaining square magnesium mass in the receiving vehicle is identified as powder, weigh the powder weight of the square magnesium mass, and then calculate the powder rate. The specific calculation method is: powder rate = powder weight / square magnesium mass weight). See the table below for specific powder rates:

[0068] Square magnesium pellet weight kg Powder weight kg Square magnesium agglomerate powder rate % First receiving car 500 103.7 20.77％ First receiving car 500 100.6 20.12％

[0069] The average powder rate of the square magnesium agglomerate is:

[0070] (20.77%+20.12%) / 2=20.45%

[0071] Reduction: Add the square magnesium agglomerates in the first receiving car and the second receiving car into the reduction furnace. There are a number of reduction tanks in the reduction furnace. The square magnesium agglomerates are evenly filled in the reduction tanks. After heating, the magnesium in the square magnesium agglomerates is reduced to form magnesium vapor, which precipitates from the square magnesium agglomerates. As the magnesium vapor moves and flows through the water cooling system, the magnesium vapor is cooled and turns into crystals. The crystallization position is located in the crystallization barrel in the reduction tank. After the reduction is completed, the crystallization barrel is pulled out of the reduction tank, and cooled. The crystals in the crystallization barrel are taken out, which are crude magnesium.

[0072] Slag scraping: Use the slag scraping tool to reach into the reduction tank and scrape out the remaining reduction slag in the reduction tank.

[0073] Material-magnesium ratio: Take out all the crude magnesium after the reduction of the square magnesium mass and calculate the material-magnesium ratio (the material-magnesium ratio specifically refers to the mass ratio of the magnesium mass to the crude magnesium output, which is used to measure the reduction efficiency of magnesium in the reduction process. The specific calculation method is: material-magnesium ratio = magnesium mass / crude magnesium). The specific material-magnesium ratio is shown in the table below:

[0074] Square magnesium pellet weight kg Weight of crude magnesium kg Material magnesium ratio First receiving car 500 78.13 6.44 First receiving car 500 79.87 6.26

[0075] The average magnesium ratio of square magnesium pellets is:

[0076] (6.44+6.26) / 2=6.35

[0077] Residue magnesium oxide content: Collect the reduction slag, wait for it to cool, and then measure the residue magnesium oxide content according to the "EDTA complexometric titration method" (by dissolving the sample with hydrochloric acid, using triethanolamine to eliminate the influence of interfering ions such as iron and aluminum, and titrating with EDTA standard solution under specific conditions, and calculating the magnesium oxide content based on the volume of the consumed EDTA standard solution); the specific residue magnesium oxide content is shown in the following table:

[0078] Residue magnesium oxide content % First receiving car 4.405 First receiving car 4.284

[0079] The average residual magnesium oxide content of the square magnesium agglomerate is:

[0080] (4.405%+4.284%) / 2=4.345%

[0081] Example 3

[0082] Determination of powder rate, material-magnesium ratio and residual magnesium oxide content of spherical magnesium pellets

[0083] Pressing: take the third mixed powder (1 t) and divide it into two portions, each weighing 500 kg, and add them into the powder elevator one by one. Scrape the third mixed powder in the powder elevator into the spherical pressing machine through a powder scraper, and press it into spherical magnesium agglomerates with a radius of 2.2 cm. Collect the prepared spherical magnesium agglomerates into a receiving car, and collect 500 kg of spherical magnesium agglomerates in each receiving car. The third mixed powder that has not been pressed into shape enters the powder elevator again through the return screw for secondary pressing, until all 1 t of the third mixed powder is pressed into spherical magnesium agglomerates and filled into two receiving cars with spherical magnesium agglomerates.

[0084] Material delivery: After the preparation of spherical magnesium agglomerates is completed, the spherical magnesium agglomerates need to be delivered from the calcination process to the reduction process and transported by a receiving vehicle. Therefore, the delivery is simulated. The simulation condition is that 500 kg of spherical magnesium agglomerates are transported by a receiving vehicle, and the transportation distance is 1 km (simulating the delivery from the calcination process to the reduction process). A total of two transportations are carried out by the receiving vehicle, 500 kg each time, and a total of 1 t is transported;

[0085] Powder rate: Detect the total powder rate in the spherical magnesium agglomerate after pressing and transportation (the powder rate specifically refers to: pressing 1t of the third mixed material powder, and then selecting the complete spherical magnesium agglomerate in the receiving vehicle after transportation. After selection, the remaining spherical magnesium agglomerate in the receiving vehicle is identified as powder, and the powder weight of the spherical magnesium agglomerate is weighed, and then the powder rate is calculated. The specific calculation method is: powder rate = powder weight / spherical magnesium agglomerate weight). The specific powder rate is shown in the table below:

[0086] Weight of spherical magnesium pellets (kg) Powder weight kg Spherical magnesium agglomerate powder rate % First receiving car 500 95.64 19.13％ First receiving car 500 96.77 19.35％

[0087] The average powder rate of spherical magnesium agglomerates is:

[0088] (19.13%+19.35%) / 2=19.24%

[0089] Reduction: Add the spherical magnesium agglomerates in the first receiving car and the second receiving car into the reduction furnace. There are a number of reduction tanks in the reduction furnace. The spherical magnesium agglomerates are evenly filled in the reduction tanks. After heating, the magnesium in the spherical magnesium agglomerates is reduced to form a magnesium vapor state, which is precipitated from the spherical magnesium agglomerates. With the movement of the magnesium vapor and flowing through the water cooling system, the magnesium vapor is cooled and turns into crystals. The crystallization position is located in the crystallization barrel in the reduction tank. After the reduction is completed, the crystallization barrel is pulled out of the reduction tank, and waits for cooling. The crystals in the crystallization barrel are taken out, which are crude magnesium.

[0090] Slag scraping: Use the slag scraping tool to reach into the reduction tank and scrape out the remaining reduction slag in the reduction tank.

[0091] Material-magnesium ratio: Take out all the crude magnesium after the reduction of the spherical magnesium mass and calculate the material-magnesium ratio (the material-magnesium ratio specifically refers to the mass ratio of the magnesium mass to the crude magnesium output, which is used to measure the reduction efficiency of magnesium in the reduction process. The specific calculation method is: material-magnesium ratio = magnesium mass / crude magnesium). The specific material-magnesium ratio is shown in the table below:

[0092] Weight of spherical magnesium pellets (kg) Weight of crude magnesium kg Material magnesium ratio First receiving car 500 81.57 6.13 First receiving car 500 82.37 6.07

[0093] The average magnesium ratio of the spherical magnesium mass is:

[0094] (6.13+6.07) / 2=6.10

[0095] Residue magnesium oxide content: Collect the reduction slag, wait for it to cool, and then measure the residue magnesium oxide content according to the "EDTA complexometric titration method" (by dissolving the sample with hydrochloric acid, using triethanolamine to eliminate the influence of interfering ions such as iron and aluminum, and titrating with EDTA standard solution under specific conditions, and calculating the magnesium oxide content based on the volume of the consumed EDTA standard solution); the specific residue magnesium oxide content is shown in the following table:

[0096] Residue magnesium oxide content % First receiving car 4.351 First receiving car 4.425

[0097] The average residual magnesium oxide content of the spherical magnesium agglomerate is:

[0098] (4.351%+4.425%) / 2=4.388%

[0099] Example 4

[0100] Determination of the powder rate, material-magnesium ratio and residual magnesium oxide content of the first type of rugby magnesium pellets

[0101] The first type of football magnesium mass is: a = 3, b = 1.5, c = 0.8, that is, the first cross-sectional equation Second cross-section equation The third cross-section equation The first cross-sectional equation and the second cross-sectional equation are used as the lofting trajectory, and the third cross-sectional equation is used as the lofting surface to perform lofting, simulate the preparation of a first flat pressing mold, and use the first flat pressing mold to press a first type of rugby-shaped magnesium mass. The first type of rugby-shaped magnesium mass has a smaller volume, but is similar to the volume of a strip-shaped magnesium mass, a square-shaped magnesium mass, or a spherical magnesium mass (the volume is measured by the water displacement method).

[0102] Pressing: take the fourth mixed powder (1 t) and divide it into two portions, each weighing 500 kg, and add them into the powder lifting machine one by one. Scrape the fourth mixed powder in the powder lifting machine into the first flat pressing mold (first flat pressing machine) through a powder scraper, and press it into the first type of rugby magnesium agglomerate. Collect the prepared first type of rugby magnesium agglomerate into a receiving car, and collect 500 kg of the first type of rugby magnesium agglomerate in each receiving car. The fourth mixed powder that has not been pressed into shape enters the powder lifting machine again through the return screw for secondary pressing, until all 1 t of the fourth mixed powder is pressed into the first type of rugby magnesium agglomerate and filled into the first type of rugby magnesium agglomerate in two receiving cars.

[0103] Material delivery: After the preparation of the first type of rugby magnesium agglomerates is completed, the first type of rugby magnesium agglomerates need to be delivered from the calcination process to the reduction process and transported by a receiving vehicle. Therefore, the delivery is simulated. The simulation condition is that 500 kg of the first type of rugby magnesium agglomerates are transported by a receiving vehicle, and the transportation distance is 1 km (simulating the delivery from the calcination process to the reduction process). A total of two times of transportation by the receiving vehicle, 500 kg each time, a total of 1 t transported;

[0104] Powder rate: the total powder rate in the first-class football magnesium agglomerate after pressing and transportation is tested (the powder rate specifically refers to: pressing 1 t of the fourth mixed material powder, and then selecting the complete first-class football magnesium agglomerate in the receiving vehicle after transportation. After selection, the remaining first-class football magnesium agglomerate in the receiving vehicle is identified as powder, and the powder weight of the first-class football magnesium agglomerate is weighed, and then the powder rate is calculated. The specific calculation method is: powder rate = powder weight / first-class football magnesium agglomerate weight). The specific powder rate is shown in the table below:

[0105]

[0106] The average powder rate of spherical magnesium agglomerates is:

[0107] (14.47%+14.72%) / 2=14.60%

[0108] Reduction: Add the first type of rugby magnesium agglomerates in the first receiving car and the second receiving car into the reduction furnace. There are a number of reduction tanks in the reduction furnace. The first type of rugby magnesium agglomerates are evenly filled in the reduction tank. After heating, the magnesium in the first type of rugby magnesium agglomerates is reduced to form a magnesium vapor state, which is precipitated from the first type of rugby magnesium agglomerates. With the movement of the magnesium vapor and flowing through the water cooling system, the magnesium vapor is cooled and becomes crystals. The crystallization position is located in the crystallization barrel in the reduction tank. After the reduction is completed, the crystallization barrel is pulled out of the reduction tank, and cooled. The crystals in the crystallization barrel are taken out, which are crude magnesium.

[0109] Slag scraping: Use the slag scraping tool to reach into the reduction tank and scrape out the remaining reduction slag in the reduction tank.

[0110] Material-magnesium ratio: Take out all the crude magnesium after the reduction of the first type of football magnesium mass, and calculate the material-magnesium ratio (the material-magnesium ratio specifically refers to the mass ratio of the magnesium mass to the crude magnesium output, which is used to measure the reduction efficiency of magnesium in the reduction process. The specific calculation method is: material-magnesium ratio = magnesium mass / crude magnesium). The specific material-magnesium ratio is shown in the table below:

[0111]

[0112]

[0113] The average magnesium ratio of the first type of football magnesium pellets is:

[0114] (5.12+5.23) / 2=5.18

[0115] Residue magnesium oxide content: Collect the reduction slag, wait for it to cool, and then measure the residue magnesium oxide content according to the "EDTA complexometric titration method" (by dissolving the sample with hydrochloric acid, using triethanolamine to eliminate the influence of interfering ions such as iron and aluminum, and titrating with EDTA standard solution under specific conditions, and calculating the magnesium oxide content based on the volume of the consumed EDTA standard solution); the specific residue magnesium oxide content is shown in the following table:

[0116] Residue magnesium oxide content % First receiving car 2.278 First receiving car 2.305

[0117] The average residual magnesium oxide content of the first type of football magnesium agglomerate is:

[0118] (2.278%+2.305%) / 2=2.292%

[0119] Example 5

[0120] Determination of the powder rate, material-magnesium ratio and residual magnesium oxide content of the second type of rugby magnesium pellets

[0121] The second type of football magnesium mass is: a = 4, b = 1.75, c = 0.9; that is, the first cross-sectional equation Second cross-section equation The third cross-section equation The first cross-sectional equation and the second cross-sectional equation are used as the lofting trajectory, and the third cross-sectional equation is used as the lofting surface to perform lofting, simulate the preparation of the second flat pressing mold, and use the second flat pressing mold to press the second type of rugby-shaped magnesium mass. The second type of rugby-shaped magnesium mass has a medium volume, but is similar to the volume of the bar-shaped magnesium mass, the square-shaped magnesium mass, or the spherical magnesium mass (the volume is measured by the water displacement method).

[0122] Pressing: take the fourth mixed powder (1 t) and divide it into two portions, each portion is 500 kg, and add them into the powder lifting machine one by one. Scrape the fourth mixed powder in the powder lifting machine into the second flat pressing mold (second flat pressing machine) through the powder scraper, press it into the second type of rugby magnesium agglomerate, and collect the prepared second type of rugby magnesium agglomerate into the receiving car, and collect 500 kg of the second type of rugby magnesium agglomerate in each receiving car; and the fourth mixed powder that has not been pressed into shape, through the return screw, enters the powder lifting machine again, and is pressed for the second time, until 1 t of the fourth mixed powder is completely pressed into the second type of rugby magnesium agglomerate, and filled into the second type of rugby magnesium agglomerate in two receiving cars.

[0123] Material delivery: After the preparation of the second-type rugby magnesium agglomerate is completed, the second-type rugby magnesium agglomerate needs to be delivered from the calcination process to the reduction process and transported by a receiving vehicle. Therefore, the delivery is simulated. The simulation condition is that 500 kg of the second-type rugby magnesium agglomerate is transported by a receiving vehicle, and the transportation distance is 1 km (simulating the delivery from the calcination process to the reduction process). A total of two transportations are carried out by the receiving vehicle, 500 kg each time, and a total of 1 t is transported;

[0124] Powder rate: Detect the total powder rate in the second-class football magnesium agglomerate after pressing and transportation (the powder rate specifically refers to: pressing 1t of the fourth mixed material powder, and then selecting the complete second-class football magnesium agglomerate in the receiving vehicle after transportation. After selection, the remaining second-class football magnesium agglomerate in the receiving vehicle is identified as powder, and the powder weight of the second-class football magnesium agglomerate is weighed, and then the powder rate is calculated. The specific calculation method is: powder rate = powder weight / second-class football magnesium agglomerate weight). The specific powder rate is shown in the table below:

[0125]

[0126] The average powder rate of the second type of football magnesium agglomerate is:

[0127] (13.56%+13.42%) / 2=13.49%

[0128] Reduction: Add the second type of rugby magnesium agglomerates in the first receiving car and the second receiving car into the reduction furnace. There are a number of reduction tanks in the reduction furnace. The second type of rugby magnesium agglomerates are evenly filled in the reduction tanks. After heating, the magnesium in the second type of rugby magnesium agglomerates is reduced to form a magnesium vapor state, which is precipitated from the second type of rugby magnesium agglomerates. With the movement of the magnesium vapor and flowing through the water cooling system, the magnesium vapor is cooled and turns into crystals. The crystallization position is located in the crystallization barrel in the reduction tank. After the reduction is completed, the crystallization barrel is pulled out of the reduction tank, and waits for cooling. The crystals in the crystallization barrel are taken out, which are crude magnesium.

[0129] Slag scraping: Use the slag scraping tool to reach into the reduction tank and scrape out the remaining reduction slag in the reduction tank.

[0130] Material-magnesium ratio: Take out all the crude magnesium after the reduction of the second type of football magnesium pellets, and calculate the material-magnesium ratio (the material-magnesium ratio specifically refers to the mass ratio of the magnesium pellets to the crude magnesium output, which is used to measure the reduction efficiency of magnesium in the reduction process. The specific calculation method is: material-magnesium ratio = magnesium pellets / crude magnesium). The specific material-magnesium ratio is shown in the table below:

[0131]

[0132] The average magnesium ratio of the second type of football magnesium pellets is:

[0133] (5.08+5.11) / 2=5.095

[0134] Residue magnesium oxide content: Collect the reduction slag, wait for it to cool, and then measure the residue magnesium oxide content according to the "EDTA complexometric titration method" (by dissolving the sample with hydrochloric acid, using triethanolamine to eliminate the influence of interfering ions such as iron and aluminum, and titrating with EDTA standard solution under specific conditions, and calculating the magnesium oxide content based on the volume of the consumed EDTA standard solution); the specific residue magnesium oxide content is shown in the following table:

[0135] Residue magnesium oxide content % First receiving car 2.288 First receiving car 2.265

[0136] The average residual magnesium oxide content of the second type of football magnesium agglomerate is:

[0137] (2.265%+2.288%) / 2=2.277%

[0138] Example 6

[0139] Determination of the powder rate, material-magnesium ratio and residual magnesium oxide content of the third type of rugby magnesium pellets

[0140] The third type of football magnesium mass is: a = 5, b = 2, c = 1; that is, the first cross-sectional equation Second cross-section equation The third cross-section equation The first cross-sectional equation and the second cross-sectional equation are used as the lofting trajectory, and the third cross-sectional equation is used as the lofting surface to perform lofting, simulate the preparation of a third flat pressing mold, and use the third flat pressing mold to press a third type of rugby-shaped magnesium mass. The third type of rugby magnesium mass has a larger volume, but is similar to the volume of a strip magnesium mass, a square magnesium mass, or a spherical magnesium mass (the volume is measured by the water displacement method).

[0141] Pressing: take the fourth mixed powder (1 t) and divide it into two portions, each portion is 500 kg, and add them into the powder lifting machine one by one. Scrape the fourth mixed powder in the powder lifting machine into the third flat pressing mold (third flat pressing machine) through the powder scraper, and press it into the third type of rugby magnesium agglomerate. Collect the prepared first type of rugby magnesium agglomerate into the receiving car, and collect 500 kg of the third type of rugby magnesium agglomerate in each receiving car; the fourth mixed powder that has not been pressed into shape, through the return screw, enters the powder lifting machine again, and is pressed for the second time, until 1 t of the fourth mixed powder is completely pressed into the third type of rugby magnesium agglomerate, and filled into the third type of rugby magnesium agglomerate in two receiving cars.

[0142] Material delivery: After the preparation of the third type of rugby magnesium agglomerates is completed, the third type of rugby magnesium agglomerates need to be delivered from the calcination process to the reduction process and transported by a receiving vehicle. Therefore, the delivery is simulated. The simulation condition is that 500 kg of the third type of rugby magnesium agglomerates are transported by a receiving vehicle, and the transportation distance is 1 km (simulating the delivery from the calcination process to the reduction process). A total of two transportations are carried out by the receiving vehicle, 500 kg each time, and a total of 1 t is transported;

[0143] Powder rate: the total powder rate in the third-class football magnesium agglomerate after pressing and transportation is tested (the powder rate specifically refers to: pressing 1t of the fourth mixed material powder, and then selecting the complete third-class football magnesium agglomerate in the receiving vehicle after transportation. After selection, the remaining third-class football magnesium agglomerate in the receiving vehicle is identified as powder, and the powder weight of the third-class football magnesium agglomerate is weighed, and then the powder rate is calculated. The specific calculation method is: powder rate = powder weight / third-class football magnesium agglomerate weight). The specific powder rate is shown in the table below:

[0144]

[0145] The average powder rate of spherical magnesium agglomerates is:

[0146] (13.85%+13.52%) / 2=13.69%

[0147] Reduction: Add the third-type rugby magnesium agglomerates in the first receiving car and the second receiving car into the reduction furnace. There are a number of reduction tanks in the reduction furnace. The third-type rugby magnesium agglomerates are evenly filled in the reduction tanks. After heating, the magnesium in the third-type rugby magnesium agglomerates is reduced to form a magnesium vapor state, which is precipitated from the third-type rugby magnesium agglomerates. With the movement of the magnesium vapor, and flowing through the water cooling system, after cooling, the magnesium vapor becomes crystals. The crystallization position is located in the crystallization barrel in the reduction tank. After the reduction is completed, the crystallization barrel is pulled out of the reduction tank, and waits for cooling. The crystals in the crystallization barrel are taken out, which are crude magnesium.

[0148] Slag scraping: Use the slag scraping tool to reach into the reduction tank and scrape out the remaining reduction slag in the reduction tank.

[0149] Material-magnesium ratio: Take out all the crude magnesium after the reduction of the third type of football magnesium pellets, and calculate the material-magnesium ratio (the material-magnesium ratio specifically refers to the mass ratio of the magnesium pellets to the crude magnesium output, which is used to measure the reduction efficiency of magnesium in the reduction process. The specific calculation method is: material-magnesium ratio = magnesium pellets / crude magnesium). The specific material-magnesium ratio is shown in the table below:

[0150]

[0151] The average magnesium ratio of the third type of football magnesium pellets is:

[0152] (5.27+5.22) / 2=5.245

[0153] Residue magnesium oxide content: Collect the reduction slag, wait for it to cool, and then measure the residue magnesium oxide content according to the "EDTA complexometric titration method" (by dissolving the sample with hydrochloric acid, using triethanolamine to eliminate the influence of interfering ions such as iron and aluminum, and titrating with EDTA standard solution under specific conditions, and calculating the magnesium oxide content based on the volume of the consumed EDTA standard solution); the specific residue magnesium oxide content is shown in the following table:

[0154] Residue magnesium oxide content % First receiving car 2.294 First receiving car 2.334

[0155] The average residual magnesium oxide content of the third type of football magnesium pellets is:

[0156] (2.294%+2.334%) / 2=2.314%

[0157] Compare the powder rate, material-magnesium ratio and residual magnesium oxide content of strip magnesium agglomerates; the powder rate, material-magnesium ratio and residual magnesium oxide content of square magnesium agglomerates; the powder rate, material-magnesium ratio and residual magnesium oxide content of spherical magnesium agglomerates; the powder rate, material-magnesium ratio and residual magnesium oxide content of the first type of rugby magnesium agglomerates; the powder rate, material-magnesium ratio and residual magnesium oxide content of the second type of rugby magnesium agglomerates; the powder rate, material-magnesium ratio and residual magnesium oxide content of the third type of rugby magnesium agglomerates; see the table below for details:

[0158]

[0159]

[0160] As can be seen from the above table,

[0161] (1) The powder rate of the football-shaped magnesium agglomerate is less than the powder rate of the spherical magnesium agglomerate, less than the powder rate of the square magnesium agglomerate, and less than the powder rate of the strip magnesium agglomerate. The powder rate of the football-shaped magnesium agglomerate is much smaller than the powder rate of the spherical magnesium agglomerate, the powder rate of the square magnesium agglomerate, or the powder rate of the strip magnesium agglomerate. This indicates that less powder is generated after the football-shaped magnesium agglomerate is pressed and transported. When the football-shaped magnesium agglomerate is added to the reduction tank, the magnesium powder will not fill the flow cavity in the reduction tank, which is more conducive to the flow of magnesium vapor in the flow cavity and facilitates the dispersion and crystallization of magnesium vapor.

[0162] (2) The magnesium ratio of the football-like magnesium agglomerate is less than the magnesium ratio of the spherical magnesium agglomerate, less than the magnesium ratio of the square magnesium agglomerate, and less than the magnesium ratio of the bar-shaped magnesium agglomerate. Moreover, the magnesium ratio of the football-like magnesium agglomerate is much smaller than the magnesium ratio of the spherical magnesium agglomerate, the magnesium ratio of the square magnesium agglomerate, or the magnesium ratio of the bar-shaped magnesium agglomerate. This indicates that the reduced magnesium vapor is more conducive to flowing out of the football-like magnesium agglomerate, crystallizing to produce more crude magnesium, and the reduced magnesium is in an optimal state. Generally, the magnesium ratio of the magnesium production process is between 5.5 and 7.5, while the magnesium ratio of the football-like magnesium agglomerate is less than 5.5. The pressing mold manufactured by the modeling equation is then pressed into the football-like magnesium agglomerate by the pressing mold. The magnesium ratio of the football-like magnesium agglomerate is between 5.0 and 5.3, which greatly improves the reduction efficiency of magnesium compared with the traditional magnesium agglomerate.

[0163] (3) The residual magnesium oxide content of the football-like magnesium agglomerates is less than the residual magnesium oxide content of the spherical magnesium agglomerates, less than the residual magnesium oxide content of the square magnesium agglomerates, and less than the residual magnesium oxide content of the strip-shaped magnesium agglomerates. The residual magnesium oxide content of the football-like magnesium agglomerates is much lower than that of the spherical magnesium agglomerates, the square magnesium agglomerates, or the strip-shaped magnesium agglomerates. The magnesium oxide content in the residue after reduction is low, which further indicates that the reduced magnesium content in the football-like magnesium agglomerates is relatively high.

[0164] (4) The use of the second type of rugby magnesium agglomerates to produce magnesium is better than the first type of rugby magnesium agglomerates and the second type of rugby magnesium agglomerates. The powder rate, material-magnesium ratio, and magnesium oxide content in the residue of the second type of rugby magnesium agglomerates are lower than those of the first type of rugby magnesium agglomerates or the second type of rugby magnesium agglomerates.

[0165] Therefore, by producing magnesium from rugby-like magnesium lumps, the powder rate is low, the material-magnesium ratio is low, and the magnesium oxide content in the residue is low, which can greatly improve the efficiency of magnesium production and increase economic benefits.

[0166] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for forming a rugby-shaped magnesium mass, characterized in that: include Step 1: Establish the first cross-section equation of the football-like magnesium mass Wherein, a represents the distance from the center point along the x-axis direction of the first cross section, and b represents the distance from the center point along the y-axis direction of the first cross section. The interval of a is set to [3, 5], and the interval of b is set to [1.5, 2]. Step 2: Establish the second cross-section equation of the football-like magnesium mass Wherein, a represents the distance from the center point along the x-axis direction of the second cross section, and c represents the distance from the center point along the z-axis direction of the second cross section. The interval of a is set to [3, 5], and the interval of c is set to [0.8, 1]; Step 3: Establish the third cross-section equation of the football-like magnesium mass Wherein, b represents the distance from the center point in the third cross section along the x-axis direction, and c represents the distance from the center point in the third cross section along the z-axis direction. The interval of b is set to [1.5, 2], and the interval of c is set to [0.8, 1]; Step 4: Use any two of the first cross-sectional equation, the second cross-sectional equation and the third cross-sectional equation as the lofting trajectory and the other group as the lofting surface for lofting; simulate the preparation of a flat pressing mold, and use the flat pressing mold to press a rugby-shaped magnesium mass.

2. A method for forming a rugby-shaped magnesium mass as claimed in claim 1, characterized in that: a is 3, b is 1.5, and c is 0.

8.

3. A method for forming a rugby-shaped magnesium mass as claimed in claim 1, characterized in that: a is 4, b is 1.75, and c is 0.

9.

4. A method for forming a rugby-shaped magnesium mass as claimed in claim 1, characterized in that: a is 5, b is 2, and c is 1.

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