CN103382525A - Magnesium alloy smelting protective fluxing agent and preparation method thereof - Google Patents
Magnesium alloy smelting protective fluxing agent and preparation method thereof Download PDFInfo
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- CN103382525A CN103382525A CN2013102498318A CN201310249831A CN103382525A CN 103382525 A CN103382525 A CN 103382525A CN 2013102498318 A CN2013102498318 A CN 2013102498318A CN 201310249831 A CN201310249831 A CN 201310249831A CN 103382525 A CN103382525 A CN 103382525A
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 33
- 230000001681 protective effect Effects 0.000 title claims abstract description 30
- 238000003723 Smelting Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 title description 4
- 230000004907 flux Effects 0.000 claims abstract description 38
- 239000000843 powder Substances 0.000 claims abstract description 16
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 14
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 14
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 14
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 7
- 229910001629 magnesium chloride Inorganic materials 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 7
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 5
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 10
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 10
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 8
- 229910052746 lanthanum Inorganic materials 0.000 claims description 5
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 5
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 5
- 239000001095 magnesium carbonate Substances 0.000 claims description 5
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 5
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 claims description 4
- 238000007873 sieving Methods 0.000 claims description 2
- QDMGKUOANLJICG-UHFFFAOYSA-N [Mg].[N+](=O)(O)[O-] Chemical compound [Mg].[N+](=O)(O)[O-] QDMGKUOANLJICG-UHFFFAOYSA-N 0.000 claims 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 23
- 239000011777 magnesium Substances 0.000 abstract description 23
- 229910052749 magnesium Inorganic materials 0.000 abstract description 22
- 238000000034 method Methods 0.000 abstract description 13
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 8
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 abstract description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 239000000956 alloy Substances 0.000 description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000003063 flame retardant Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 208000028571 Occupational disease Diseases 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000001573 beryllium compounds Chemical class 0.000 description 1
- XNEYCQMMVLAXTN-UHFFFAOYSA-N carbonic acid;magnesium Chemical compound [Mg].OC(O)=O XNEYCQMMVLAXTN-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- PALNZFJYSCMLBK-UHFFFAOYSA-K magnesium;potassium;trichloride;hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-].[Cl-].[K+] PALNZFJYSCMLBK-UHFFFAOYSA-K 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
Abstract
一种镁合金熔炼保护熔剂，其化学成分质量百分比为：碳酸钡8-15%、硫酸钙12-20%、碳酸钙10-18%、氯化镁12-15%、硝酸镁12-20%、碳酸镁12-20%、氯化锂1-5%和稀土氧化物1-5%；上述熔炼防护熔剂的制备方法主要是：将上述原料在170-210℃分别烘干脱水；再将上述烘干的原料混合后放入球磨机碾磨成粉状，其粉状的平均颗粒尺寸小于10μm；将上述粉状物过筛后，装入密闭容器中备用。本发明工艺简单、成本低廉、阻燃性能好、高温保护效果佳，能有效地减少有害气体的排放。A magnesium alloy smelting protection flux, its chemical composition mass percent is: 8-15% of barium carbonate, 12-20% of calcium sulfate, 10-18% of calcium carbonate, 12-15% of magnesium chloride, 12-20% of magnesium nitrate, carbonic acid 12-20% of magnesium, 1-5% of lithium chloride and 1-5% of rare earth oxide; the preparation method of the above-mentioned smelting protective flux is mainly: drying and dehydrating the above-mentioned raw materials at 170-210°C; After the raw materials are mixed, they are put into a ball mill to grind into powder, and the average particle size of the powder is less than 10 μm; after the above powder is sieved, put it into a closed container for standby. The invention has the advantages of simple process, low cost, good flame retardancy, good high temperature protection effect and can effectively reduce the discharge of harmful gas.
Description
技术领域 technical field
本发明属于金属材料与冶金类领域，特别涉及一种熔炼保护熔剂及其制备方法。 The invention belongs to the field of metal materials and metallurgy, and in particular relates to a smelting protective flux and a preparation method thereof. the
背景技术 Background technique
镁合金作为最轻的工程金属结构材料，具有比重轻、比强度及比刚度高、阻尼性及切削加工性好、导热性好、电磁屏蔽能力强以及减振性好和易于回收的优点，满足航空、航天、现代汽车工业对减重、节能的要求，并可替代工程塑料以满足3C（计算机、通讯、消费类电子）产品的轻、薄、小型化，高集成度以及环保方面的要求，成为现代汽车和3C产业的首选材料，被誉为“21世纪的绿色工程材料”。 As the lightest engineering metal structure material, magnesium alloy has the advantages of light specific gravity, high specific strength and specific stiffness, good damping and machinability, good thermal conductivity, strong electromagnetic shielding ability, good vibration damping and easy recycling. Aviation, aerospace, and modern automobile industries have requirements for weight reduction and energy saving, and can replace engineering plastics to meet the requirements of 3C (computer, communication, consumer electronics) products in terms of lightness, thinness, miniaturization, high integration, and environmental protection. It has become the material of choice for modern automobiles and 3C industries, and is known as "the green engineering material of the 21st century". the
但是较差的耐蚀性能和极高的化学活性，已然成为制约镁合金应用的两大主要技术瓶颈。长久以来，在镁合金熔炼保护中，人们已做了大量的工作，来防止镁液的氧化和燃烧，但迄今为止尚未很好地解决。镁合金在熔炼过程中的易氧化和燃烧问题是阻碍镁合金熔炼技术和加工技术发展的关键，严重影响到镁合金材料的发展和应用。 However, poor corrosion resistance and high chemical activity have become two major technical bottlenecks restricting the application of magnesium alloys. For a long time, in the protection of magnesium alloy melting, people have done a lot of work to prevent the oxidation and combustion of molten magnesium, but it has not been well solved so far. The easy oxidation and combustion of magnesium alloys during the smelting process is the key to hindering the development of magnesium alloy smelting technology and processing technology, which seriously affects the development and application of magnesium alloy materials. the
当前，镁合金在熔炼过程中的保护方法主要有：气体保护法和熔剂保护法。 At present, the protection methods of magnesium alloys in the smelting process mainly include: gas protection method and flux protection method. the
气体保护法实施最为简单、且对铸件性能的影响最小。上世纪70年代至今，以SF6气体为代表的的气体保护技术一直是镁工业界普遍采用的镁合金阻燃保护方法。然而，温室效应所引起的环境问题日益引起人们的关注。SF6是一种严重的温室效应气体，其温室效应约为CO2的23900倍，SF6的生命周期估计可达3200年，并且会严重破坏臭氧层。因此，国际镁业协会(IMA)已确定于2015年前实现SF6的零排放(Cashion S P et.al.Journal of Light Metals，2002;1：37)。 The gas protection method is the easiest to implement and has the least impact on casting performance. Since the 1970s, the gas protection technology represented by SF 6 gas has been the flame retardant protection method for magnesium alloys commonly used in the magnesium industry. However, the environmental problems caused by the greenhouse effect have attracted people's attention day by day. SF 6 is a serious greenhouse effect gas, its greenhouse effect is about 23900 times that of CO 2 , the life cycle of SF 6 is estimated to be up to 3200 years, and it will seriously damage the ozone layer. Therefore, the International Magnesium Association (IMA) has determined to realize the zero discharge of SF 6 before 2015 (Cashion S P et.al.Journal of Light Metals, 2002; 1:37).
熔剂保护法就是在熔炼过程中，在镁熔体表面覆盖熔剂，对镁液精炼， 对去除镁液中的气体和氧化夹杂。现在普遍使用的熔剂由无水光卤石(MgCl2-KCl)为主添加一些氟化物、氯化物组成，该熔剂使用前要重熔脱水，加到镁液表面时立即化成水状，同时释放出呛人的气味，污染环境，厂房严重锈蚀，操作者呼吸道职业病多，此外，该熔剂造渣能力低，与镁熔体的分离性差，易裹入镁熔体内形成熔剂夹杂。上海交通大学的发泡镁合金覆盖剂(CN1122112C)的特点是该覆盖剂在使用过程中产生惰性气体气泡，其保护性能优于传统熔剂，但是其高温下的保护效果不理想。上海交通大学的镁及镁合金复合保护阻燃覆盖熔剂及其生产方法(CN1208481C)的特点是复合保护，提高覆盖剂在在高温下的保护效果，但是铍化物的加入虽然提高了阻燃性能，却致使合金晶粒粗大，会降低合金的力学性能。 The flux protection method is to cover the flux on the surface of the magnesium melt during the smelting process, refine the magnesium liquid, and remove gas and oxidized inclusions in the magnesium liquid. The flux commonly used now is mainly composed of anhydrous carnallite (MgCl 2 -KCl) with some fluoride and chloride added. The flux must be remelted and dehydrated before use. It emits a choking smell, pollutes the environment, the workshop is seriously corroded, and the operators have many respiratory occupational diseases. In addition, the flux has low slagging ability and poor separation from the magnesium melt, so it is easy to be wrapped in the magnesium melt to form flux inclusions. The foamed magnesium alloy covering agent (CN1122112C) of Shanghai Jiaotong University is characterized in that the covering agent produces inert gas bubbles during use, and its protection performance is better than that of traditional fluxes, but its protection effect at high temperatures is not ideal. Magnesium and magnesium alloy composite protective flame retardant covering flux and its production method (CN1208481C) of Shanghai Jiaotong University are characterized by composite protection, which improves the protective effect of the covering agent at high temperatures, but although the addition of beryllium compounds improves the flame retardant performance, However, the grains of the alloy are coarse, which will reduce the mechanical properties of the alloy.
发明内容： Invention content:
本发明的目的在于提供一种工艺简单、成本低廉、阻燃性能好、高温保护效果佳的镁合金熔炼保护熔剂。 The object of the present invention is to provide a protective flux for smelting magnesium alloys with simple process, low cost, good flame retardancy and good high temperature protection effect. the
本发明的镁合金熔炼保护熔剂的化学成分质量百分比为:碳酸钡8-15%、硫酸钙12-20%、碳酸钙10-18%、氯化镁12-15%、硝酸镁12-20%、碳酸镁12-20%、氯化锂1-5%和稀土氧化物1-5%。所述稀土氧化物包括：氧化镧、氧化铈、氧化富镧富铈中的一种或者多种，多种时各氧化物成分质量百分数等同。 The chemical composition mass percent of magnesium alloy smelting protective flux of the present invention is: 8-15% of barium carbonate, 12-20% of calcium sulfate, 10-18% of calcium carbonate, 12-15% of magnesium chloride, 12-20% of magnesium nitrate, carbonic acid Magnesium 12-20%, lithium chloride 1-5% and rare earth oxide 1-5%. The rare earth oxides include: one or more of lanthanum oxide, cerium oxide, and lanthanum-rich cerium oxide, and when there are more than one, the mass percentage of each oxide component is equal. the
上述镁合金熔炼防护熔剂的制备方法： The preparation method of above-mentioned magnesium alloy smelting protective flux:
（1）将上述原料在170-210℃分别烘干脱水； (1) Dry and dehydrate the above raw materials at 170-210°C;
（2）将上述烘干的原料混合后放入球磨机碾磨成粉状，其平均颗粒尺寸小于10μm； (2) Mix the above-mentioned dried raw materials and put them into a ball mill to grind them into powder with an average particle size of less than 10 μm;
（3）将上述粉状物过筛后，装入密闭容器中备用。 (3) After sieving the above powder, put it into a closed container for later use. the
使用时，将上述镁合金熔炼防护熔剂撒在镁表面上，炉内温度高于500 ℃以后，防护熔剂逐渐融化，并且产生直径为2-3mm的气泡，随着温度继续升高，熔剂迅速在镁液表面融化并铺展开，镁没有发生氧化燃烧。在高温下这种保护效果可持续3h。 When in use, sprinkle the above magnesium alloy smelting protective flux on the magnesium surface. After the temperature in the furnace is higher than 500 °C, the protective flux will gradually melt and produce bubbles with a diameter of 2-3mm. As the temperature continues to rise, the flux rapidly The surface of the magnesium liquid melts and spreads, and the magnesium does not oxidize and burn. This protective effect can last for 3 hours at high temperature. the
本发明与现有技术相比具有如下优点： Compared with the prior art, the present invention has the following advantages:
1、工艺简单，成本低廉。 1. The process is simple and the cost is low. the
2、在使用过程中，不会引入合金元素，并且提高了镁合金的燃点，使其获得优良的阻燃性能。 2. During use, no alloying elements will be introduced, and the ignition point of the magnesium alloy will be improved, so that it can obtain excellent flame retardancy. the
3、高温性能好，在高温条件下（大于500℃），熔剂熔化成液态，铺开在合金或镁液表面，起到隔绝空气的作用。同时，发泡物质受热分解放出气体，一方面使熔剂浮在镁液表面，另一方面，也起到隔绝空气中氧的作用。 3. Good high-temperature performance. Under high-temperature conditions (greater than 500°C), the flux melts into a liquid state and spreads on the surface of the alloy or magnesium liquid to isolate the air. At the same time, the foaming substance is heated and decomposed to release gas. On the one hand, the flux floats on the surface of the magnesium liquid, and on the other hand, it also plays a role in isolating oxygen in the air. the
4、减少有害气体的排放，达到环保的目的。 4. Reduce the emission of harmful gases and achieve the purpose of environmental protection. the
5、熔炼除渣效果好。 5. The effect of smelting and slag removal is good. the
具体实施方式： Detailed ways:
实施例1 Example 1
取碳酸钡8kg、硫酸钙20kg、碳酸钙18kg、氯化镁12kg、硝酸镁20kg、碳酸镁20kg、氯化锂1kg、氧化富镧富铈1kg。将上述原料分别在170℃烘干脱水；再将上述烘干的原料混合后放入球磨机碾磨成平均颗粒尺寸小于10μm的粉状；将上述粉状物过筛后制备成镁合金熔炼保护熔剂，并将其装入密闭容器中备用。 Get 8kg of barium carbonate, 20kg of calcium sulfate, 18kg of calcium carbonate, 12kg of magnesium chloride, 20kg of magnesium nitrate, 20kg of magnesium carbonate, 1kg of lithium chloride, and 1kg of lanthanum-rich cerium oxide. Dry and dehydrate the above-mentioned raw materials at 170°C; then mix the above-mentioned dried raw materials and put them into a ball mill to grind them into a powder with an average particle size of less than 10 μm; sieve the above-mentioned powders to prepare a protective flux for magnesium alloy smelting , and store it in an airtight container. the
使用时，在镁表面撒上上述镁合金熔炼防护熔剂，炉内温度高于500℃以后，防护熔剂逐渐融化，并且产生直径为2mm的气泡，随着温度继续升高，熔剂迅速在在镁液表面融化并铺展开，镁没有发生氧化燃烧。在高温下这种保护效果持续3h。 When in use, sprinkle the protective flux for magnesium alloy smelting on the surface of magnesium. After the temperature in the furnace is higher than 500°C, the protective flux will gradually melt and produce bubbles with a diameter of 2mm. As the temperature continues to rise, the flux will rapidly dissolve in the molten magnesium The surface melted and spread out, and the magnesium did not oxidize and burn. This protective effect lasts for 3h at high temperature. the
实施例2 Example 2
取碳酸钡15kg、硫酸钙20kg、碳酸钙18kg、氯化镁15kg、硝酸镁12kg、碳酸镁12kg、氯化锂3kg、氧化镧2.5kg、氧化铈2.5kg。将上述原料分别在200℃烘干脱水；再将上述烘干的原料混合后放入球磨机碾磨成平均颗粒尺寸小于10μm的粉状；将上述粉状物过筛后制备成镁合金熔炼保护熔剂，并将其装入密闭容器中备用。 Get barium carbonate 15kg, calcium sulfate 20kg, calcium carbonate 18kg, magnesium chloride 15kg, magnesium nitrate 12kg, magnesium carbonate 12kg, lithium chloride 3kg, lanthanum oxide 2.5kg, cerium oxide 2.5kg. Dry and dehydrate the above-mentioned raw materials at 200°C; then mix the above-mentioned dried raw materials and put them into a ball mill to grind them into a powder with an average particle size of less than 10 μm; sieve the above-mentioned powders to prepare protective flux for magnesium alloy smelting , and store it in an airtight container. the
使用时，在镁表面撒上上述镁合金熔炼防护熔剂，炉内温度高于500℃以后，防护熔剂逐渐融化，并且产生直径为2.5mm的气泡，随着温度继续升高，熔剂迅速在镁合金液表面融化并铺展开，镁合金没有发生氧化燃烧。在高温下这种保护效果持续3h。 When in use, sprinkle the above protective flux for magnesium alloy smelting on the surface of magnesium. After the temperature in the furnace is higher than 500°C, the protective flux will gradually melt and produce bubbles with a diameter of 2.5mm. As the temperature continues to rise, the flux will rapidly dissolve in the magnesium alloy. The surface of the liquid melted and spread out, and the magnesium alloy did not oxidize and burn. This protective effect lasts for 3h at high temperature. the
实施例3 Example 3
取碳酸钡15kg、硫酸钙12kg、碳酸钙10kg、氯化镁15kg、硝酸镁20kg、碳酸镁20kg、氯化锂5kg、氧化镧1kg、氧化铈1kg、氧化富镧富铈1kg。将上述原料分别在180℃烘干脱水；再将上述烘干的原料混合后放入球磨机碾磨成平均颗粒尺寸小于10μm的粉状；将上述粉状物过筛后制备成镁合金熔炼保护熔剂，并将其装入密闭容器中备用。 Take 15kg of barium carbonate, 12kg of calcium sulfate, 10kg of calcium carbonate, 15kg of magnesium chloride, 20kg of magnesium nitrate, 20kg of magnesium carbonate, 5kg of lithium chloride, 1kg of lanthanum oxide, 1kg of cerium oxide, and 1kg of lanthanum-rich cerium oxide. Dry and dehydrate the above-mentioned raw materials at 180°C; then mix the above-mentioned dried raw materials and put them into a ball mill to grind them into a powder with an average particle size of less than 10 μm; sieve the above-mentioned powders to prepare protective flux for magnesium alloy smelting , and store it in an airtight container. the
使用时，在镁表面撒上上述镁合金熔炼防护熔剂，炉内温度高于500℃以后，防护熔剂防护熔剂逐渐融化，并且产生直径为3mm的气泡，随着温度继续升高，熔剂迅速在在镁合金液表面融化并铺展开，镁合金没有发生氧化燃烧。在高温下这种保护效果持续3h。 When in use, sprinkle the protective flux for magnesium alloy smelting above on the surface of magnesium. After the temperature in the furnace is higher than 500°C, the protective flux will gradually melt and produce bubbles with a diameter of 3mm. The surface of the magnesium alloy liquid melted and spread out, and the magnesium alloy did not oxidize and burn. This protective effect lasts for 3h at high temperature. the
实施例4 Example 4
取碳酸钡12kg、硫酸钙18kg、碳酸钙15kg、氯化镁14kg、硝酸镁17kg、碳酸镁18kg、氯化锂3kg、氧化铈1.5kg、氧化富镧富铈1.5kg。 将上述原料分别在210℃烘干脱水；再将上述烘干的原料混合后放入球磨机碾磨成平均颗粒尺寸小于10μm的粉状；将上述粉状物过筛后制备成镁合金熔炼保护熔剂，并将其装入密闭容器中备用。 Get 12kg of barium carbonate, 18kg of calcium sulfate, 15kg of calcium carbonate, 14kg of magnesium chloride, 17kg of magnesium nitrate, 18kg of magnesium carbonate, 3kg of lithium chloride, 1.5kg of cerium oxide, and 1.5kg of lanthanum-rich cerium oxide. Dry and dehydrate the above-mentioned raw materials at 210°C; then mix the above-mentioned dried raw materials and put them into a ball mill to grind them into a powder with an average particle size of less than 10 μm; sieve the above-mentioned powders to prepare protective flux for magnesium alloy smelting , and store it in an airtight container. the
使用时，在镁表面撒上上述镁合金熔炼防护熔剂，炉内温度高于500℃以后，防护熔剂逐渐融化，并且产生直径为2mm的气泡，随着温度继续升高，熔剂迅速在在镁液表面融化并铺展开，镁没有发生氧化燃烧。在高温下这种保护效果持续3h。 When in use, sprinkle the protective flux for magnesium alloy smelting on the surface of magnesium. After the temperature in the furnace is higher than 500°C, the protective flux will gradually melt and produce bubbles with a diameter of 2mm. As the temperature continues to rise, the flux will rapidly dissolve in the molten magnesium The surface melted and spread out, and the magnesium did not oxidize and burn. This protective effect lasts for 3h at high temperature. the
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