JPH02274826A - Method for removing iron in magnesia ore - Google Patents
Method for removing iron in magnesia oreInfo
- Publication number
- JPH02274826A JPH02274826A JP9701489A JP9701489A JPH02274826A JP H02274826 A JPH02274826 A JP H02274826A JP 9701489 A JP9701489 A JP 9701489A JP 9701489 A JP9701489 A JP 9701489A JP H02274826 A JPH02274826 A JP H02274826A
- Authority
- JP
- Japan
- Prior art keywords
- chlorine
- chloride
- magnesia ore
- magnesium
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 97
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 239000000395 magnesium oxide Substances 0.000 title claims abstract description 54
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 20
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims abstract description 74
- 229910001629 magnesium chloride Inorganic materials 0.000 claims abstract description 37
- 239000000460 chlorine Substances 0.000 claims abstract description 26
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 24
- 150000003839 salts Chemical class 0.000 abstract description 18
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 abstract description 16
- 229910021578 Iron(III) chloride Inorganic materials 0.000 abstract description 15
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052749 magnesium Inorganic materials 0.000 abstract description 14
- 239000011777 magnesium Substances 0.000 abstract description 14
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract description 11
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract description 4
- 229910052783 alkali metal Inorganic materials 0.000 abstract description 3
- 150000001340 alkali metals Chemical class 0.000 abstract description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 21
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 10
- 238000005660 chlorination reaction Methods 0.000 description 8
- 239000012535 impurity Substances 0.000 description 7
- CSNNHWWHGAXBCP-UHFFFAOYSA-L magnesium sulphate Substances [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 7
- 235000019341 magnesium sulphate Nutrition 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 239000011780 sodium chloride Substances 0.000 description 5
- 238000005868 electrolysis reaction Methods 0.000 description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical group [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 2
- 239000001095 magnesium carbonate Substances 0.000 description 2
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910001617 alkaline earth metal chloride Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 229910001902 chlorine oxide Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 210000003754 fetus Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- -1 sodium chloride Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、マグネシア“鉱石の脱鉄法、特に、塩化マグ
ネシウムを電解してマグネシウムを製造するに際し、塩
化マグネシウムの原料として用いるマグネシア鉱石中に
不純物として含まれる鉄分を除去するマグネシア鉱石の
脱鉄法、に関する。Detailed Description of the Invention (Industrial Application Field) The present invention is directed to a method for deironizing magnesia ore, in particular, to produce magnesium by electrolyzing magnesium chloride. This invention relates to a method for removing iron from magnesia ore, which removes iron contained as impurities.
（従来の技術）
マグネシウムの製造法は大別すると熱還元法と電解法の
二つがあるが、現在その殆どが塩化マグネシウムを電解
する電解法で製造されている０本発明者らは、先に塩化
マグネシウムを電解してマグネシウムを製造する電解槽
に供給するのに適した塩化マグネシウムの製造方法を提
案した（平成元年３月１６日付特許出願）、この方法は
、アルカリ金属又は／及びアルカリ土類金属の塩化物か
らなる溶融塩中に固体粉末状の酸化マグネシウム又は／
及び炭酸マグネシウムを懸濁させ、この懸濁液中に塩素
を含むガスを送通して酸化マグネシウムと塩素を反応さ
せる方法である。(Prior art) Magnesium production methods can be roughly divided into two types: thermal reduction method and electrolytic method, but currently most of them are produced by electrolytic method in which magnesium chloride is electrolyzed. We proposed a method for producing magnesium chloride suitable for supplying it to an electrolytic cell that produces magnesium by electrolyzing magnesium chloride (patent application dated March 16, 1989). Solid powdered magnesium oxide or/
This is a method in which magnesium carbonate is suspended, and a gas containing chlorine is passed through the suspension to cause the magnesium oxide and chlorine to react.
この方法において、酸化マグネシウム源としてマグネシ
ア鉱石を使用した場合、このマグネシア鉱石中に不純物
として含まれている各種の酸化物は、けい酸（Ｓｉｎｓ
）等一部を除いてすべて塩素化される。マグネシア鉱石
中に含まれる主要な不純物は酸化カルシウム（Ｃａｂ）
と酸化鉄（Ｆｅ、Ｏ，）で、酸化カルシウムは塩化カル
シウム（ＣａＣＪ！ ｔ）となり、溶融塩中に溶は込む
、一方、酸化鉄は塩化第二鉄（ＦｅＣ１ｓ）となる、塩
化第二鉄の沸点は３１４℃であり、塩素化時の溶融塩の
温度は５００℃以上であるので、塩化第二鉄は揮発して
しまうはずであるが、塩化マグネシウムの電解に使用さ
れる溶融塩は普通電気伝導性を向上させるため、あるい
は融点を下げるために塩化ナトリウムを含有しているの
で、塩化ナトリウムとこの塩化第二鉄とが複塩となり、
沸点が上昇する。そのため、溶融塩の塩素化時に通常用
いられる温度である６５０〜７００℃においては塩化第
二鉄は揮発せず、不純物として溶融塩中に残留する。従
来は、この溶融塩中に残留した塩化第二鉄、即ち、不純
物として含まれる鉄分を除去することなく、そのまま電
解に供していた。In this method, when magnesia ore is used as a source of magnesium oxide, various oxides contained as impurities in this magnesia ore are
) etc. All but a few are chlorinated. The main impurity contained in magnesia ore is calcium oxide (Cab).
and iron oxide (Fe, O,), calcium oxide becomes calcium chloride (CaCJ!t) and dissolves into the molten salt, while iron oxide becomes ferric chloride (FeC1s), ferric chloride The boiling point of magnesium chloride is 314℃, and the temperature of the molten salt during chlorination is over 500℃, so ferric chloride should volatilize, but the molten salt used for electrolysis of magnesium chloride is usually Since it contains sodium chloride to improve electrical conductivity or lower the melting point, sodium chloride and this ferric chloride form a double salt,
The boiling point increases. Therefore, ferric chloride does not volatilize at a temperature of 650 to 700° C., which is a temperature normally used when chlorinating a molten salt, and remains in the molten salt as an impurity. Conventionally, the ferric chloride remaining in this molten salt, that is, the iron contained as an impurity, was not removed and the salt was directly subjected to electrolysis.
（発明が解決しようとする謀Ｒ）
上記のように塩化鉄として鉄分を含有する溶融塩を電解
浴塩として電解すると、電解しようとする塩化マグネシ
ウムより分解電圧の低い塩化鉄が先に電解され、Ｆｅが
陰極上に析出して、同じ陰極上に析出するマグネシウム
に混入し、純度の高いマグネシウムを得ることができな
かった。(Plot R to be solved by the invention) As described above, when a molten salt containing iron as iron chloride is electrolyzed as an electrolytic bath salt, iron chloride, which has a lower decomposition voltage than magnesium chloride to be electrolyzed, is electrolyzed first, Fe precipitated on the cathode and mixed with magnesium precipitated on the same cathode, making it impossible to obtain highly pure magnesium.
本発明は、マグネシア鉱石の脱鉄法を提供しようとする
もので、その主な目的は、上記のような問題がない高純
度のマグネシウムの製造に適した塩化マグネシウムを供
給できるように、その原料であるマグネシア鉱石中に含
まれる鉄分を予め除去する方法を提供すること、にある
。The present invention aims to provide a method for deironizing magnesia ore, and its main purpose is to provide a raw material for magnesium chloride that is suitable for producing high-purity magnesium without the above-mentioned problems. An object of the present invention is to provide a method for removing iron contained in magnesia ore.
（課題を解決するための手段）
本発明は、鉄分を含有するマグネシア鉱石を溶融塩化マ
グネシウム中で塩素と反応させることを特徴とするマグ
ネシア鉱石の脱鉄法、を要旨とする。(Means for Solving the Problems) The gist of the present invention is a method for removing iron from magnesia ore, which is characterized by reacting magnesia ore containing iron with chlorine in molten magnesium chloride.
マグネシア磁石はＭｇＯを主成分とし、他にＦｅｔｕｓ
、Ｃａ０％５ｌｏｔ等を含有する鉱石であるが、通常は
溶融塩化マグネシウムに懸濁させた状態で塩素と反応さ
せるので、粉末状・で用いるのが好ましい。Magnesia magnets have MgO as the main component, and Fetus
It is an ore containing 0% 5 lots of Ca, etc., but it is usually reacted with chlorine while suspended in molten magnesium chloride, so it is preferable to use it in powder form.
マグネシア鉱石と反応させる塩素としては塩素ガスが単
独で用いられるが、後述の（１）式によって酸化鉄（Ｆ
ａｔ’ｓ）を塩化第二鉄（ＦｅＣＪ！ ｓ）に変えるに
足りる塩素を含むガスであれば、他のガスを含んだ混合
ガスを用いてもよい、あるいはホスゲン（ＣＯＣｌ ｍ
”）のように分解してＣｌ、を発生するガスも使用でき
る。Chlorine gas is used alone as the chlorine to be reacted with magnesia ore, but iron oxide (F
A gas mixture containing other gases may be used as long as the gas contains sufficient chlorine to convert ferric chloride (at's) into ferric chloride (FeCJ!s), or phosgene (COCl m
Gases that decompose to generate Cl can also be used.
溶融塩化マグネシウムは塩化第二鉄と複塩を形成して沸
点を上昇させる塩化ナトリウムのような塩を含有してい
ないことが必要である。It is necessary that the molten magnesium chloride does not contain salts such as sodium chloride, which form double salts with ferric chloride and raise the boiling point.
（作用）
本発明のマグネシア鉱石の脱鉄法は下記（１）の反応式
％式％（１）
に基づきマグネシア鉱石中に不純物として含まれる鉄分
が塩素と反応して塩化第二鉄に変化することを利用する
方法である。(Function) The method for removing iron from magnesia ore according to the present invention is based on the reaction formula (1) below, in which iron contained as an impurity in magnesia ore reacts with chlorine and changes to ferric chloride. This is a method that takes advantage of this fact.
塩化マグネシウムは塩化第二鉄と複塩をつくらないので
、溶融塩化マグネシウム中にマグネシア鉱石を懸濁させ
塩素ガスを送通ずると、前記（１）の反応式により鉄分
は塩化第二鉄になり、揮発除去される。この場合、酸化
マグネシウムは塩素と反応せず、塩化マグネシウム中に
は脱鉄されたマグネシア鉱石が残る。Magnesium chloride does not form a double salt with ferric chloride, so when magnesia ore is suspended in molten magnesium chloride and chlorine gas is passed through it, the iron content turns into ferric chloride according to the reaction formula (1) above. It is removed by volatilization. In this case, magnesium oxide does not react with chlorine, and deironated magnesia ore remains in magnesium chloride.
このマグネシア鉱石を含有する塩化マグネシウムをアル
カリ金属又は／及びアルカリ土類金属の塩化物からなる
電解浴塩と混合し、その中に塩素ガスを送通することに
よりマグネシア鉱石中の酸化マグネシウムを塩素化して
塩化マグネシウムに変化させ、電解浴塩の塩化マグネシ
ウム濃度を増大させる。この電解浴塩は鉄分を含まない
ので、これを電解することにより純度の高いマグネシウ
ムを得ることができる。Magnesium chloride containing this magnesia ore is mixed with electrolytic bath salt consisting of chlorides of alkali metals and/or alkaline earth metals, and chlorine gas is passed through the mixture to chlorinate the magnesium oxide in the magnesia ore. is converted into magnesium chloride to increase the concentration of magnesium chloride in the electrolytic bath salt. Since this electrolytic bath salt does not contain iron, highly pure magnesium can be obtained by electrolyzing it.
第１図は本発明を実施するための装置の一例を示す概略
断面図で、前記の酸化マグネシウムの塩素化に使用され
る塩素他炉の例である。FIG. 1 is a schematic sectional view showing an example of an apparatus for carrying out the present invention, and is an example of a chlorine furnace used for chlorinating the above-mentioned magnesium oxide.
同図において、１は耐火物で構成された塩素他炉、２は
その上蓋で、塩素他炉ｌの炉壁上方部には原料の酸化マ
グネシウム又は／及び炭酸マグネシウムを投入する原料
投入口４が、また、塩素他炉１の底部には塩素ガスある
いは塩素を含んだガスを送通ずるガス送入口８が設けら
れている。上蓋２にはガス送入口８から送通した塩素と
酸化マグネシウムとが反応した後のガスを排出するガス
排出口３が取り付けられている。In the figure, 1 is a chlorine furnace made of refractories, 2 is its upper cover, and in the upper part of the furnace wall of the chlorine furnace 1 is a raw material inlet 4 into which raw materials magnesium oxide and/or magnesium carbonate are input. Furthermore, a gas inlet 8 is provided at the bottom of the chlorine furnace 1 for passing chlorine gas or a gas containing chlorine. A gas outlet 3 is attached to the upper lid 2 for discharging gas after the chlorine and magnesium oxide reacted through the gas inlet 8.
上記のように構成された装置によりマグネシア鉱石中に
不純物として含まれている鉄分を除去するには、前記第
１図において、まず溶融塩化マグネシウム５を塩素他炉
１に導入し、８００℃程度に保つ０図には示していない
が、塩素他炉１には浴塩加熱装置が取り付けられている
０次に、原料投入口４から必要量のマグネシア鉱石の粉
末を入れ、機械的攪拌あるいはガスバブリング等の方法
により溶融塩化マグネシウム５中に懸濁させる０次いで
ガス送入口８から塩素含有ガスを送通し、溶融塩化マグ
ネシウム５中を気泡６として上昇させ、懸濁しているマ
グネシア鉱石７中の鉄分と反応させる。ガス送入口８に
は通常多孔質板あるいは小孔ノズル等が取り付けられて
いるので、塩素含有ガスは細かい気泡６となり、懸濁し
ているマグネシア鉱石７中の鉄分と効率よく反応する。In order to remove iron contained in magnesia ore as an impurity using the apparatus configured as described above, firstly, as shown in FIG. Although it is not shown in the figure, the chlorine furnace 1 is equipped with a bath salt heating device.Next, the required amount of magnesia ore powder is poured into the raw material inlet 4, and then heated by mechanical stirring or gas bubbling. Then, a chlorine-containing gas is passed through the gas inlet 8 to rise in the molten magnesium chloride 5 as bubbles 6, and the iron content in the suspended magnesia ore 7 is Make it react. Since the gas inlet 8 is usually equipped with a porous plate or a small hole nozzle, the chlorine-containing gas forms fine bubbles 6 and reacts efficiently with the iron in the suspended magnesia ore 7.
マグネシア鉱石７中の鉄分と塩素とは前記（１）式のよ
うに反応し、塩化第二鉄を生成し、この塩化第二鉄は気
体となって未反応の塩素ガス等と共に上蓋２に設けられ
ているガス排出口３から排出される。排出ガスには多量
の塩素が含まれているので、回収するのが望ましい。The iron content and chlorine in the magnesia ore 7 react as shown in equation (1) above to produce ferric chloride, and this ferric chloride becomes a gas and is placed in the upper lid 2 together with unreacted chlorine gas, etc. The gas is discharged from the gas exhaust port 3 which is provided with the gas discharge port 3. Since the exhaust gas contains a large amount of chlorine, it is desirable to recover it.
このように、鉄分が除去されたマグネシア鉱石を含有す
る溶融塩化マグネシウムを、引き続きこの塩素化炉ｌ内
でアルカリ金属又は／及びアルカリ土類金属の塩化物か
らなる電解浴塩と混合し、塩素含有ガスを送通すること
により、マグネシア鉱石の酸化マグネシウムを塩素化し
て塩化マグネシウムに変化させ、高純度のマグネシウム
の製造に通した塩化マグネシウム含有浴塩とすることが
できる。In this way, molten magnesium chloride containing magnesia ore from which iron has been removed is subsequently mixed in this chlorination furnace with an electrolytic bath salt consisting of an alkali metal or/and alkaline earth metal chloride to form a chlorine-containing By passing the gas through, the magnesium oxide in the magnesia ore is chlorinated and converted into magnesium chloride, thereby making it possible to obtain a magnesium chloride-containing bath salt that can be used to produce high-purity magnesium.
上記の装置の例は塩素化炉をそのまま使用した場合であ
るが、上記の機能を備えた専用の装置を用いてもよい。The example of the above-mentioned apparatus is a case where a chlorination furnace is used as is, but a dedicated apparatus having the above-mentioned functions may also be used.
（実施例）
第１図に示した構成を有する内径５００−一一、高さ３
５００ｍｓの塩素化炉を用い、８００℃の溶融塩化マグ
ネシウム６００ｇ中に、ＭｇＯ：９１．０％、Ｆｅ＊Ｏ
ｓ：０．６８％を含有するマグネシア鉱石の微粉末（１
００メツシユ篩下）４００ｇを懸濁させ、塩素ガスを吹
込んだ。(Example) Inner diameter 500-11, height 3 having the configuration shown in Fig. 1
Using a 500ms chlorination furnace, MgO: 91.0%, Fe*O was added to 600g of molten magnesium chloride at 800°C.
Fine powder of magnesia ore containing s: 0.68% (1
00 mesh sieve) was suspended, and chlorine gas was blown into the suspension.
第２図はマグネシア鉱石を懸濁させた溶融塩化マグネシ
ウム中のＦｅ濃度の時間的な変化を示したグラフである
が、１１時間の塩素化処理により鉄分は塩化第二鉄とな
って揮発し、Ｐｅ濃度は塩素化前の０．２７％から０．
００５％に低下した。Figure 2 is a graph showing the temporal change in Fe concentration in molten magnesium chloride in which magnesia ore is suspended. After 11 hours of chlorination treatment, the iron content becomes ferric chloride and volatilizes. The Pe concentration increased from 0.27% before chlorination to 0.27% before chlorination.
It decreased to 0.005%.
この塩化マグネシウム２００ｇを塩化ナトリウム６００
ｇ及び塩化カルシウム２００区と混合して混合塩とし、
塩素ガスを吹込んで塩素化し、次いで電解した。生成し
たマグネシウム中のＰａ濃度は２０ｐ＋）−以下であっ
た。Add 200g of this magnesium chloride to 600g of sodium chloride.
g and 200 blocks of calcium chloride to make a mixed salt,
It was chlorinated by blowing in chlorine gas and then electrolyzed. The Pa concentration in the produced magnesium was 20p+)- or less.
比較のため、上記の脱鉄処理を行わないマグネシア鉱石
２００ｇを塩化マグネシウム２００ｇ、塩化ナトリウム
４００ｇ及び塩化カルシウム２００ｇと混合して混合塩
とし、上記の実施例と同じ条件で塩素化した。For comparison, 200 g of magnesia ore that was not subjected to the above-described iron removal treatment was mixed with 200 g of magnesium chloride, 400 g of sodium chloride, and 200 g of calcium chloride to obtain a mixed salt, and chlorinated under the same conditions as in the above example.
得られた混合塩は０．２２％の塩化鉄を含んでいた。The resulting mixed salt contained 0.22% iron chloride.
次いでこの混合塩を電解したところ、電解初期に生成し
たマグネシウムには２００ｐρ−の鉄分が含まれていた
。When this mixed salt was then electrolyzed, the magnesium produced at the initial stage of electrolysis contained 200 pp- of iron.
上記の実施例及び比較例から、本発明方法を用いること
によりマグネシア鉱石中の鉄分が著しく減少し、その結
果、電解により生成するマグネシウムの純度が大幅に向
上していることがわかる。From the above Examples and Comparative Examples, it can be seen that by using the method of the present invention, the iron content in magnesia ore is significantly reduced, and as a result, the purity of magnesium produced by electrolysis is significantly improved.
（発明の効果）
マグネシア鉱石を溶融塩化マグネシウム中で塩素と反応
させる本発明方法により、マグネシア鉱石中の鉄分を除
去することが可能である。特に、塩化マグネシウムを電
解してマグネシウムを製造するに際し、塩化マグネシウ
ムの原料として用いるマグネシア鉱石に本発明方法を通
用することにより、マグネシア鉱石中の鉄分を容易に除
去することができ、高純度のマグネシウムの製造に通し
た塩化マグネシウムを得ることができる。しかも、酸化
マグネシウムなどを塩素化して塩化マグネシウムを生成
させる塩素化炉をそのまま使用することが可能で、実用
上の効果は極めて大きい。(Effects of the Invention) By the method of the present invention in which magnesia ore is reacted with chlorine in molten magnesium chloride, it is possible to remove iron from magnesia ore. In particular, when producing magnesium by electrolyzing magnesium chloride, by applying the method of the present invention to magnesia ore used as a raw material for magnesium chloride, the iron content in the magnesia ore can be easily removed, and high-purity magnesium can be produced. Magnesium chloride can be obtained through the production of Moreover, it is possible to use a chlorination furnace that chlorinates magnesium oxide and the like to produce magnesium chloride as is, and the practical effect is extremely large.
第１図は本発明方法を実施するための装置の一例を示す
概略断面図、
第２図は本発明方法を適用した場合の溶融塩化マグネシ
ウム中のＰｅ＋９１度の経時変化を示したグラフ、であ
る。
出願人 大阪チタニウム製造株式会社
代理人 弁理士 穂上照忠 （ばか１名）第
図
簗
図
時
闇
（Ｈｒ）FIG. 1 is a schematic cross-sectional view showing an example of an apparatus for carrying out the method of the present invention, and FIG. 2 is a graph showing the change over time of Pe+91 degrees in molten magnesium chloride when the method of the present invention is applied. . Applicant: Osaka Titanium Manufacturing Co., Ltd. Agent: Patent attorney: Terutada Hogami (1 idiot) Figure 1: Yanzu Tokiyami (Hr)
Claims (1)
中で塩素と反応させることを特徴とするマグネシア鉱石
の脱鉄法。A method for removing iron from magnesia ore, which is characterized by reacting magnesia ore containing iron with chlorine in molten magnesium chloride.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9701489A JPH02274826A (en) | 1989-04-17 | 1989-04-17 | Method for removing iron in magnesia ore |
| CA002012009A CA2012009C (en) | 1989-03-16 | 1990-03-13 | Process for the electrolytic production of magnesium |
| NO90901189A NO901189L (en) | 1989-03-16 | 1990-03-14 | PROCEDURE FOR ELECTROLYTIC PREPARATION OF PURE MAGNESIUM. |
| US07/493,733 US5089094A (en) | 1989-03-16 | 1990-03-15 | Process for the electrolytic production of magnesium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9701489A JPH02274826A (en) | 1989-04-17 | 1989-04-17 | Method for removing iron in magnesia ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02274826A true JPH02274826A (en) | 1990-11-09 |
| JPH0532452B2 JPH0532452B2 (en) | 1993-05-17 |
Family
ID=14180484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9701489A Granted JPH02274826A (en) | 1989-03-16 | 1989-04-17 | Method for removing iron in magnesia ore |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02274826A (en) |
-
1989
- 1989-04-17 JP JP9701489A patent/JPH02274826A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0532452B2 (en) | 1993-05-17 |
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