【発明の詳細な説明】〔産業上の利用分野〕本発明は天然産の黒鉛含有物または製鉄業當で発生ずる
副４」：黒鉛含有物からの黒鉛回収方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for recovering graphite from naturally occurring graphite-containing materials or from graphite-containing materials generated in the steel industry.
黒鉛は天然に産する他、製鉄業での副Ｐ４：物として発
生ずる。すなわち、製鉄業においては、製鋼Ｔ場の脱硫
工程で多量の黒鉛含有物が生じ、有効利用されないまま
産業廃棄物として投棄されることが多い。近年、高純度
黒鉛はＮＷＩ滑剤、炭素パツキン等の原料用として需要
が増大してきた。また、黒鉛含有物を投棄する際の発塵
は公害の原因となる。このようなことから、製鉄業では
黒鉛含有物の回収、有効利用が望まれている。In addition to being produced naturally, graphite also occurs as a secondary product in the steel industry. That is, in the steel industry, a large amount of graphite-containing substances are generated in the desulfurization process at steelmaking T plants, and are often dumped as industrial waste without being effectively utilized. In recent years, demand for high-purity graphite has increased as a raw material for NWI lubricants, carbon packing, etc. In addition, dust generated when graphite-containing materials are dumped causes pollution. For this reason, it is desired in the steel industry to recover and effectively utilize graphite-containing materials.
ところで、天然産又は製鉄業発生等の粒状黒鉛含有物は
黒鉛純度が低く、利用価値のある高純度黒鉛を得るため
には、粒状黒鉛含有物より高純度黒鉛を分離、精製する
黒鉛回収方法が必要となる。By the way, granular graphite-containing materials produced naturally or in the steel industry have low graphite purity, and in order to obtain high-purity graphite that is useful, a graphite recovery method that separates and refines high-purity graphite from granular graphite-containing materials is necessary. It becomes necessary.
従来の黒鉛回収方法としては浮遊選鉱による方法がよく
知られている。これは、例えば特開昭５８−２２３６１
０号公報に示される如く、黒鉛含有ダストを水中に懸濁
さセ、そこへ気泡を注入し、ダスト−水−空気の３相間
に働く表面張力を利用することにより、水に濡れがたい
疏水生物を気泡に付着さゼ、その浮力により表面に浮か
び上からゼで黒鉛を回収する方法である。As a conventional graphite recovery method, a method using flotation is well known. For example, JP-A No. 58-22361
As shown in Publication No. 0, graphite-containing dust is suspended in water, air bubbles are injected into it, and the surface tension acting between the three phases of dust, water, and air is used to create hydrophobic organisms that are difficult to wet with water. This is a method of collecting graphite from the surface by attaching it to air bubbles and floating it to the surface due to its buoyancy.
この方法では、純度９７〜９８％の黒鉛を回収率９０％
辺、１−で回収できる利１シがあるが、次の問題点があ
る。This method has a recovery rate of 90% for graphite with a purity of 97-98%.
There is an advantage that can be recovered with side 1-, but there is the following problem.
（イ）気泡剤としてパイン油等の油脂類を使用する必要
があり、処理１スＩ・を高める０、（ロ）浮遊１バ鉱の
下工稈で水処理ずろ必要かあ／）、作業工程が煩雑で処
理二１ストを一層高める。(a) It is necessary to use oils and fats such as pine oil as a foaming agent, increasing the treatment rate. The process is complicated and the processing time is further increased.
本発明は斯かる問題点を解決して、黒鉛含有物、１：り
黒鉛を従来法に四散する純度および回収率で、しかも経
済性よく回収する方法を提供することを１“１的とする
う〔課題を解決するだめの手段〕本発明の方法は、黒鉛含有物を水を加えてスうリー化し
た後、？！ｔＡ式篩によって前記スラリーよりＩｌ１粒
１． ＄）含有物を分岬し２、分離された札れ“Ｉハ４
．＠）含有物に対して脱水、塩酸協力１１による酸洗、
脱水、アルカリ洗どｐ、乾燥をｈｌｈずごとにより、前
記黒鉛含有物から１口１純度の黒鉛を回収するものであ
る６本発明の方法を第１図を参１］クイしてＴ稈＋ｎｒ
ｉ ｔ、こ説明する。An object of the present invention is to solve such problems and provide a method for recovering graphite-containing material, 1:1 graphite, with a purity and recovery rate comparable to conventional methods, and in an economical manner. [Another means to solve the problem] The method of the present invention involves adding water to a graphite-containing material to form a slurry, and then separating the containing material from the slurry using a ?tA sieve. Misaki 2, separated tag “Iha 4”
．． @) Dehydration of the contained materials, pickling with hydrochloric acid cooperation 11,
The method of the present invention is to recover one piece of pure graphite from the graphite-containing material by sequentially dehydrating, alkaline washing, and drying.
It, I'll explain.
０ スラリー化製鋼−ｒ、場にて産する補集ダスＩ・等は粉塵状態の成
分を多く含む。それ故、本発明では先ず、補集ダスト等
の黒鉛含イ１物に１水を１ｊ−２て粉塵状態用鉛分を水
中に懸濁さ・已てスラリー化状態にする。0 Slurry steelmaking-r, collected dust I, etc. produced in the field contain many components in the form of dust. Therefore, in the present invention, first, 1 part of water is added to 1 part of graphite-containing material such as collected dust, and the lead content for dust is suspended in water to form a slurry.
（〕 ン！品工いａ７製鋼工場に゛（産する代表的な補集ダス１〜の粒疫別成
分分布を第１表に示す。Table 1 shows the distribution of components by particle size of typical collected dust 1~ produced in steel mills.
第 １ 表第１表に示すように黒鉛の粒度は仕較的ネ１１粒のもの
が多い。一方、鉄分＆Ｊ細粒のものが多い。それ故、黒
鉛含有物の多い鉗粒分を取り出すことが望まれることに
なる。Table 1 As shown in Table 1, the grain size of graphite is often 11 grains. On the other hand, there are many iron and J fine particles. Therefore, it is desirable to extract the scales containing a large amount of graphite.
ところで、湿式篩は円筒又は多角形状の回転ドラムに篩
を張り、内面より黒鉛含有スラリーを供給するものであ
る。スラリー中の黒鉛粒径により、篩の径および回転ド
ラノ、の傾斜角度が定められる。By the way, a wet sieve is a sieve placed on a cylindrical or polygonal rotating drum, and a graphite-containing slurry is supplied from the inner surface of the sieve. The diameter of the sieve and the angle of inclination of the rotating draught are determined by the graphite particle size in the slurry.
洗浄水は篩上に注入される。洗浄水としては篩下に落ち
た水を集め回収した還流水が使われることが多い。Wash water is injected onto the sieve. The reflux water collected by collecting the water that fell under the sieve is often used as washing water.
本発明者は、前ｊホしたように黒鉛の粒径が大きいこと
から１、二の湿Ｊ（篩によってＩ！ｉｔ １：＋を篩分
けることか適切であるとした。湿式篩であれば￥Ｉ′！
径の大きい黒鉛が効果的に骨部１できるのめならず、水
洗いによって篩分番〕能率が−１かり、また回転によ−
１て高速篩分ｉＪもできるのである。The present inventor determined that it would be appropriate to sieve I!it 1:+ with a wet sieve because the particle size of graphite is large as mentioned above. ￥I'!
Graphite with a large diameter can be effectively formed into bones 1, and rinsing with water reduces the sieve size by -1, and rotation also reduces the sieve size by -1.
1) High-speed sieving can also be performed.
以−Ｉのことから、本発明で＆ン１湿式篩による篩分Ｇ
ノによって黒鉛含有物からＩｌ１粒分を取り出し、篩ト
−に・落らる水は回収され使用される。From the above, in the present invention, the sieve fraction G by &n1 wet sieve is
One grain of Il is taken out from the graphite-containing material by 2 steps, and the water that falls into the sieve is collected and used.
○ 不純物除ノに７［稈篩上の粗１１″！黒鉛含有物については、黒鉛の純度を
さらに高め高純度黒鉛とするために、その内に含まれる
Ｆｅ、ＣａＯｌＭｇＯ等の不純物を取除く必要がある。○ To remove impurities, use 7 [rough 11" on the culm sieve! For graphite-containing materials, in order to further improve the purity of graphite and make high-purity graphite, it is necessary to remove impurities such as Fe, CaO, MgO, etc. There is.
本発明における不純物除去二Ｆ程は次の脱水、酸洗、ア
ルカリ洗浄、水洗、脱水の工程よりなる。The impurity removal step 2 in the present invention consists of the following steps of dehydration, pickling, alkaline washing, water washing, and dehydration.
・ 脱水（−次）スラリー中の水分を除き、粗粒黒鉛含有物を次の酸洗い
等の処理され易い状態にする。- Dehydration (-next) Remove water from the slurry and make the coarse graphite-containing material ready for the next process such as pickling.
・ 酸洗篩分は後の黒鉛中のＦｅ、ＣａＯ、ＭｇＯ等の不純物を
除去する。酸洗いに塩酸を使用する理由番」、次の実験
による。- The pickling sieve removes impurities such as Fe, CaO, and MgO in the graphite. Reasons for using hydrochloric acid for pickling, according to the following experiment.
（イ）塩酸による実験純度７２％の黒鉛を塩酸で処理した場合、塩酸温度と処
理後の黒鉛純度との関係は、第２図のようになる。図で
（瀉才塩酸温度８０°（：のとき、△は塩酸温度２０℃
のときを示す。(a) Experiment with hydrochloric acid When graphite with a purity of 72% is treated with hydrochloric acid, the relationship between the hydrochloric acid temperature and the graphite purity after treatment is as shown in Figure 2. In the figure (when the hydrochloric acid temperature is 80° (:), △ is the hydrochloric acid temperature 20°C
Indicates when.
塩酸温度８０°Ｃの場合の黒鉛純度は９８％で最ｊ：ｉ
、塩Ｖ温度２０℃の場合の黒鉛純度は８５％で最高であ
った。このことは塩酸を使用した場合、／、１に度８０
℃の方が、塩酸？農産２０％の場合より黒鉛純度を最も
高める。When the hydrochloric acid temperature is 80°C, the graphite purity is 98% and the maximum j:i
When the salt V temperature was 20° C., the graphite purity was the highest at 85%. This means that when using hydrochloric acid, /, 1 degree 80
℃ is more hydrochloric acid? Graphite purity is highest compared to 20% agricultural product.
（＋１）硫酸による実験純度７２％の黒鉛を硅酸で処理した場合、硫酸濃度と黒
鉛純度との関係は第３図のようになる。(+1) Experiment with sulfuric acid When graphite with a purity of 72% is treated with silicic acid, the relationship between sulfuric acid concentration and graphite purity is as shown in FIG.
硫酸温度６０°Ｃのときを０印、硫酸温度２０ ’ｃの
ときをΔ印で示す。A 0 mark indicates a sulfuric acid temperature of 60°C, and a Δ mark indicates a sulfuric acid temperature of 20°C.
硫酸温度６０′Ｃの場合における黒鉛純度は８７％で最
高、硫酸温度２０“Ｃの場合における黒鉛純度は８５％
で最高である。The graphite purity is the highest at 87% when the sulfuric acid temperature is 60'C, and the graphite purity is 85% when the sulfuric acid temperature is 20'C.
It's the best.
実験（イ）および（シ１）は、塩酸使用時および硫酸使
用時における酸洗後の黒鉛純度の差を示−４もので、ノ
Ｊ髪鉛純度としては塩酸使用時の方がはるかに高い。Experiments (A) and (C1) show the difference in graphite purity after pickling when using hydrochloric acid and when using sulfuric acid, and the purity of graphite after pickling is much higher when using hydrochloric acid. .
このことにより黒鉛の不純物を取除くためには、塩酸を
例えばｌ農産２０％、温度８０ ℃の条件で使用するこ
とが有効となる。Therefore, in order to remove impurities from graphite, it is effective to use hydrochloric acid at a concentration of 20% and a temperature of 80° C., for example.
以上のことから本発明では塩酸にょる酸洗を採用する。For the above reasons, the present invention employs pickling with hydrochloric acid.
好ましい酸洗法としては黒鉛含有物を温度１５〜２５％
、温度）（０〜９０℃の塩酸中に約５時間浸漬し鉄分等
を除去する方法である。塩酸濃度がＥｉ ’ＡＶすぎる
場合および塩酸が低ｌ、ｌ＋Ａの場合は浸漬時間は長時
間となり、濃度とｉ’＋！！を度は不純物除去に適した
状態にしておく必要がある。なお、高純度の黒鉛要求さ
れる場合は他の酸洗と併合して使用することも可能であ
る。例えばＳ ｉ ０２除去のときは弗酸等による処理
と併合する。A preferred pickling method is to pickle the graphite-containing material at a temperature of 15 to 25%.
, temperature) (This is a method to remove iron, etc. by immersing it in hydrochloric acid at 0 to 90°C for about 5 hours. If the hydrochloric acid concentration is too high, or if the hydrochloric acid is low l or l + A, the immersion time will be long. , concentration and i'+!! must be in a state suitable for removing impurities.In addition, if high purity graphite is required, it can be used in combination with other pickling. For example, when removing S i 02, treatment with hydrofluoric acid or the like is combined.
酸洗いによって高純度化された黒鉛に０１着する塩酸お
よび溶出スラリーを分離する。The hydrochloric acid and elution slurry adhering to the highly purified graphite by pickling are separated.
・ アルカリ洗浄酸洗いにより高純度化された黒鉛中にイ」着する塩酸お
よびスラリー分を少量の水による水洗いによって取除い
た後、ｐ １＋ （１１′ｌを管理しながらアルカリに
て洗浄して中イ・１１する。・Alkali washing After removing the hydrochloric acid and slurry deposited in the highly purified graphite by washing with a small amount of water, the graphite was washed with alkali while controlling p 1+ (11'l). Middle school A/11.
０ 乾燥高純度黒鉛中の水分を除去するものであり、例えば黒鉛
の逸失を防１）−できる乾＋Ｖ器で乾燥する。0 It is used to remove moisture from dry high-purity graphite, for example, it is dried in a dry + V oven that can prevent loss of graphite.
本発明法では、従来の浮ｉＭ’ 選鉱法で必“県とされ
る油脂類を使用することがなく、しがも湿式篩下に落ち
る篩分水は還流、再使用できるため、全体の水使用量は
僅少であり、そのため低コストである。また、湿式篩を
使うことにょっ゛ζスラリー中の粒状黒鉛含有物のうち
黒鉛物の多い＊］■ね分を選別して取り出すことができ
、次工程のｉ′Ｉｔｇ＋を軽減する。次二Ｆ稈において
も酸洗に塩酸を使い、粗粒黒鉛含有物、Ｌす、卜゛（・
、Ｃ：ａＣ’１．ＭｇＯ等の不純物を効率よく除去する
ごとができ、最終的には純度９８％の黒鉛が回収できる
。The method of the present invention does not use the oils and fats that are required in the conventional flotation method, and the sieve water that falls under the wet sieve can be recirculated and reused. The amount used is small, and therefore the cost is low.In addition, by using a wet sieve, it is possible to sort out the granular graphite-containing material in the slurry, which has a large proportion of graphite*. , to reduce i′Itg+ in the next step. Hydrochloric acid is also used for pickling in the second F culm to remove coarse graphite-containing materials,
, C:aC'1. Impurities such as MgO can be efficiently removed, and graphite with a purity of 98% can be recovered in the end.
［実施例〕次に、本発明法を実プラン１へで実施するときの態様を
第４図に説明する。[Example] Next, the manner in which the method of the present invention is implemented for actual plan 1 will be described with reference to FIG. 4.
黒鉛含有物はスラリー槽１に入り、１人された水と混合
して深度（ＩＯへ５０％）に調整される。The graphite-containing material enters the slurry tank 1 and is adjusted to depth (50% to IO) by mixing with soaked water.
調整のための機構は熊手式またはエアー吹込式が適切で
ある。スラリー槽１で生成されたスラリーはボンブイで
１配管３を通り第１段部式篩２に入る。A rake type or air blow type mechanism is suitable for the adjustment mechanism. The slurry produced in the slurry tank 1 passes through one pipe 3 using a bomb buoy and enters the first stage sieve 2.
湿式篩２は第１段、？！＋１：式篩４ｔ；１第２段であ
る。Wet sieve 2 is the first stage, ? ! +1: Type sieve 4t; 1 second stage.
第１段部式篩２の篩トスラリ−は配管５を通って第２段
湿ア（篩３に入る。第１段、第２段の篩−１−の黒鉛含
有物は配管６を通って脱水器７に入る。第２段の篩下の
黒鉛５を除去されたスラリーは配管８を通り還流槽９に
戻される。The sieve slurry of the first stage sieve 2 passes through piping 5 and enters the second stage humidifier (sieve 3). The slurry enters the dehydrator 7. The slurry from which the graphite 5 under the second stage sieve has been removed passes through the pipe 8 and is returned to the reflux tank 9.
第１段、第２段部式篩２．４は例えば回転速度２０〜５
０ｒｐｎ、傾斜角６〜１０°で運転される。篩の網目は
黒鉛含有物の粒径を配慮して８０〜１．００メツシユで
ある。篩の段数は粒度の大小によるか２〜３段で十分に
分級する。回転速度、傾斜角、網１＋１、段数は黒鉛の
粒度、性状に応じて黒鉛回収率か高く、かっ投錨コスト
を商めないように適当に変更される。The first stage and second stage type sieves 2.4 have a rotational speed of 20 to 5, for example.
It is operated at 0 rpm and an inclination angle of 6-10°. The mesh size of the sieve is 80 to 1.00 mesh, taking into consideration the particle size of the graphite-containing material. The number of sieves depends on the particle size, and 2 to 3 sieves are sufficient for classification. The rotation speed, inclination angle, mesh 1+1, and the number of stages are appropriately changed depending on the particle size and properties of graphite so as to obtain a high graphite recovery rate and reduce the cost of anchorage.
還流槽９では、１−澄水は水槽１０に入り、沈澱物は配
信１１を通って鉄源として（，１１出回収される。In the reflux tank 9, 1- clear water enters the water tank 10 and the sediment passes through the distribution 11 and is recovered as a source of iron.
水槽１０の中の水は吸上りられ配管１２を通って第１段
、第２段部式篩・＼篩の］−１詰まり防＋Ｌのための洗
浄水として供給される３、脱水器７し４遠心分離器であり黒鉛含有物より水分を除
く。脱水された黒鉛含有物は取Ｉ−げられ経路１４を経
て酸洗槽１３に入る。The water in the water tank 10 is sucked up and passed through the piping 12 and supplied as washing water for the first and second stage sieves/\sieves]-1 to prevent clogging +L 3. Dehydrator 7. 4 A centrifugal separator to remove water from graphite-containing materials. The dehydrated graphite-containing material is removed and enters the pickling tank 13 via a path 14.
酸洗槽１３は耐酸性容器内に塩酸を入れ空気との接触を
防＋１しながら、ボイラー１５によって加温される装置
であり、黒鉛含有物中の不純物は酸の中に溶解除去され
る。酸洗槽内の塩酸での不純物除去をより１１Ｆ進する
ため、酸洗槽１３に攪拌機を挿入することもできる。The pickling tank 13 is a device in which hydrochloric acid is placed in an acid-resistant container and heated by a boiler 15 while preventing contact with air, and impurities in the graphite-containing material are dissolved and removed in the acid. A stirrer can also be inserted into the pickling tank 13 in order to further remove impurities with hydrochloric acid in the pickling tank 11F.
酸洗により分離されたＩ（４鉛は配管１６を経てアルカ
リ洗浄槽１７に入る。アルカリ洗浄槽１７は槽の内部に
回転式孔イ【ｊ円筒２１を設け、黒鉛をその中に入れて
遠心力によって脱水させ、アルカリ水をその中に注入す
ることによりアリカリ洗浄さ−け、更に水をその中に注
入して回転させることよって水洗、脱水する構造である
。廃液は出０１Ｂより排出される。同転式円筒内部より
高純度の含水黒鉛が回収される。The I (4 lead) separated by pickling enters the alkaline cleaning tank 17 via piping 16.The alkaline cleaning tank 17 has a rotary hole cylinder 21 inside the tank, and the graphite is placed in it and centrifuged. It has a structure in which water is dehydrated by force, alkaline water is injected into it for alkali cleaning, and water is further injected into it and rotated to wash and dehydrate it.The waste liquid is discharged from outlet 01B. .High-purity hydrated graphite is recovered from the inside of the rotary cylinder.
アルカリ洗浄槽７の代わりに耐酸性遠心分離器および１
ｉｉ４酸型プレスフイルターまたはオリバーフィルター
の使用も可能である。Acid-resistant centrifugal separator and 1 instead of alkaline cleaning tank 7
It is also possible to use ii4 acid press filters or Oliver filters.
回収された含水黒鉛ば経１１９を経て乾燥装置２０に入
り乾燥される。乾燥装置Ｙ ２０を第５図（イ）（Ｌ７
）の模式図に４次に説明する。The recovered hydrated graphite passes through the tube 119 and enters the drying device 20 to be dried. The drying device Y 20 is shown in Figure 5 (A) (L7
) will be explained as follows.
スチーム加熱二ｌ車器構造のドラ１．２１内に前記含水
黒鉛を投入口２２より入れる。ドラム２１の中心には回
転する攪拌羽根２６があり、これは回収黒鉛の乾燥のば
らつきを防１１−する。トラト内で発生ずる水蒸気を排
出するためアスピレータ−２４が吸引口２５に取１＝Ｉ
りれる。吸引口２５配置内のフィルター２７は黒鉛の飛
散を防止する。水蒸気排出には真空ポンプ方式、圧縮空
気利用方式等が用いれる。ドラム外周二重器に加えられ
る熱源は重油燃焼による高温空気を使うごともできる。The hydrated graphite is introduced into a drum 1.21 having a steam heating two-liter container structure through an inlet 22. At the center of the drum 21 is a rotating stirring blade 26, which prevents uneven drying of the recovered graphite. An aspirator 24 is installed at the suction port 25 to exhaust the water vapor generated inside the torato.
I can get it. A filter 27 within the suction port 25 arrangement prevents scattering of graphite. Vacuum pump methods, compressed air methods, etc. are used to discharge water vapor. The heat source added to the drum outer circumferential duplexer can also be high-temperature air generated by burning heavy oil.
、 前記実ブラン１へにおいて本発明法を実際に実施し
た結果を次に説明する。The results of actually implementing the method of the present invention on the above-mentioned Jitsuburan 1 will be explained below.
原料ダストは第１表に示す粒度分布、品位分布のものを
使用した。そして下記条件で本発明法を実施した。The raw material dust used had a particle size distribution and quality distribution shown in Table 1. The method of the present invention was then carried out under the following conditions.
スラリー濃度−３５％回転篩 トラム直径：５０ｃｍドラ１、回転速
度： ３５ ｒ ｐ丁ｎ篩１４ ： ８０メソシユ段数；２段酸 洗 塩酸濃度：２０％加熱温度＝８０°Ｃ加熱時間・５時間得られた回収黒鉛の工程別成分は第２表の通りであり、
最終黒鉛含有量は９７．８％に達している。Slurry concentration - 35% Rotating sieve Tram diameter: 50 cm Dryer 1, rotation speed: 35 rp sieve 14: Number of 80 mesh plates; 2-stage pickling Hydrochloric acid concentration: 20% Heating temperature = 80°C Heating time: 5 hours The components of the recovered graphite by process are shown in Table 2.
The final graphite content reaches 97.8%.
第 ２ 表〔発明の効果〕以１−の説明から明らかなように、本発明は高純度の黒
鉛を簡単な工程で経済性よく回収し、従来放棄されてい
た製鋼ダスト等を炭素パツキン、炭素潤滑剤等の高価値
用途の原料として活用させるとともに、わ）ｐｘ飛散防
止により公害防止δこも寄与するものである。Table 2 [Effects of the Invention] As is clear from the explanation in 1-1 below, the present invention economically recovers high-purity graphite through a simple process, and converts conventionally discarded steelmaking dust into carbon packing and carbon In addition to being used as a raw material for high-value applications such as lubricants, it also contributes to pollution prevention by preventing px scattering.
第１図は本発明の方法を示す工程図、第２図は塩酸濃度
と黒鉛純度との関係を示した線図、第３図は硫酸と黒鉛
純度との関係を示した線図、第４図は本発明の実施に通
した装置を示す模式図、第５図（イ）（ロ）は第４図装
置に用いられる乾燥装置の説明図で、（イ）は斜視図、
（１７）はΔ−Ａ断面矢視図である。図中、１ニスラリ−槽、２，４：湿式篩、７：脱水器、
９：還流槽、ｌＯ；水槽、１３：酸洗槽、１７：アルカ
リ洗浄槽、２０：乾燥装置、２１；回転式孔付円筒。ｑ〕２６撹桿羽根−９６一Figure 1 is a process diagram showing the method of the present invention, Figure 2 is a diagram showing the relationship between hydrochloric acid concentration and graphite purity, Figure 3 is a diagram showing the relationship between sulfuric acid and graphite purity, and Figure 4 is a diagram showing the relationship between sulfuric acid and graphite purity. The figure is a schematic diagram showing an apparatus through which the present invention is carried out, FIGS.
(17) is a Δ-A cross-sectional arrow view. In the figure, 1 Nis slurry tank, 2, 4: wet sieve, 7: dehydrator,
9: reflux tank, lO: water tank, 13: pickling tank, 17: alkali cleaning tank, 20: drying device, 21: rotary cylinder with hole. q] 26 Stirring rod blade - 961
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63080167AJPH01249615A (en) | 1988-03-30 | 1988-03-30 | Method for recovering graphite from graphite-containing material |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63080167AJPH01249615A (en) | 1988-03-30 | 1988-03-30 | Method for recovering graphite from graphite-containing material |
| Publication Number | Publication Date |
|---|---|
| JPH01249615Atrue JPH01249615A (en) | 1989-10-04 |
| JPH0553726B2 JPH0553726B2 (en) | 1993-08-10 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63080167AGrantedJPH01249615A (en) | 1988-03-30 | 1988-03-30 | Method for recovering graphite from graphite-containing material |
| Country | Link |
|---|---|
| JP (1) | JPH01249615A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100880923B1 (en)* | 2006-12-13 | 2009-02-04 | 한국지질자원연구원 | High Purity Purification Method of Natural Impression Graphite Using Pressure Low Expansion Method |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7663607B2 (en) | 2004-05-06 | 2010-02-16 | Apple Inc. | Multipoint touchscreen |
| US8804056B2 (en) | 2010-12-22 | 2014-08-12 | Apple Inc. | Integrated touch screens |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100880923B1 (en)* | 2006-12-13 | 2009-02-04 | 한국지질자원연구원 | High Purity Purification Method of Natural Impression Graphite Using Pressure Low Expansion Method |
| Publication number | Publication date |
|---|---|
| JPH0553726B2 (en) | 1993-08-10 |
| Publication | Publication Date | Title |
|---|---|---|
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