JPS6384691A - Treatment of waste pickling liquid of steel products - Google Patents
Treatment of waste pickling liquid of steel productsInfo
- Publication number
- JPS6384691A JPS6384691A JP22906586A JP22906586A JPS6384691A JP S6384691 A JPS6384691 A JP S6384691A JP 22906586 A JP22906586 A JP 22906586A JP 22906586 A JP22906586 A JP 22906586A JP S6384691 A JPS6384691 A JP S6384691A
- Authority
- JP
- Japan
- Prior art keywords
- waste
- fluorine
- calcium
- waste liquid
- liquid
- 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.)
- Pending
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 68
- 239000002699 waste material Substances 0.000 title claims abstract description 64
- 238000005554 pickling Methods 0.000 title claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 18
- 239000010959 steel Substances 0.000 title claims abstract description 18
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 37
- 239000011737 fluorine Substances 0.000 claims abstract description 37
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 18
- 239000000126 substance Substances 0.000 claims abstract description 14
- 239000010802 sludge Substances 0.000 claims abstract description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 20
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 18
- 239000011575 calcium Substances 0.000 claims description 17
- 229960002050 hydrofluoric acid Drugs 0.000 claims description 15
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 12
- 239000010812 mixed waste Substances 0.000 claims description 11
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 9
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 9
- 239000003814 drug Substances 0.000 claims description 6
- 229940079593 drug Drugs 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 3
- 239000005997 Calcium carbide Substances 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 2
- 230000001376 precipitating effect Effects 0.000 claims 1
- 239000002253 acid Substances 0.000 abstract description 13
- 239000002893 slag Substances 0.000 abstract description 11
- 239000000920 calcium hydroxide Substances 0.000 abstract description 2
- 235000011116 calcium hydroxide Nutrition 0.000 abstract description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000003472 neutralizing effect Effects 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 description 11
- 239000010935 stainless steel Substances 0.000 description 11
- 239000002351 wastewater Substances 0.000 description 11
- 238000005406 washing Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000006386 neutralization reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004065 wastewater treatment Methods 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、ステンレス鋼材などの鋼材の酸洗い廃液の処
理方法に関し、特に廃液中のふっ素成分を低減させ得る
処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for treating waste liquid from pickling of steel materials such as stainless steel materials, and particularly to a treatment method capable of reducing fluorine components in the waste liquid.
［従来の技術］
鋼材、例えば、ステンレス鋼製鋼材では、表面処理とし
て従来より酸洗い処理が行われている。[Prior Art] Steel materials, such as stainless steel materials, have conventionally been subjected to pickling treatment as a surface treatment.
この酸洗い処理では、硝弗酸および硫酸を用いているた
め、酸洗い処理復に硝弗酸系廃液及び硫酸系廃液が発生
する。Since this pickling treatment uses nitric-fluoric acid and sulfuric acid, nitric-fluoric acid-based waste liquid and sulfuric acid-based waste liquid are generated after the pickling process.
この硝弗酸系廃液および硫酸系廃液を放流前に処理する
必要がある。It is necessary to treat this nitrofluoric acid-based waste liquid and sulfuric acid-based waste liquid before discharging it.
近年、産業界では殊に、廃液のふっ素成分含有量を抑え
ることが要請されている。In recent years, there has been a particular demand in industry to reduce the fluorine component content of waste fluids.
［発明が解決しようとする問題点］
本発明は上記した実情に鑑みなされたちので、その目的
は、廃液中のふっ素含有予を激減することができる鋼材
の酸洗い処理方法を提供するにある。[Problems to be Solved by the Invention] The present invention was made in view of the above-mentioned circumstances, and its purpose is to provide a method for pickling steel materials that can drastically reduce the fluorine content in waste liquid.
Ｌ問題点を解決するための手段］
本発明に係る鋼材の醇洗い廃液の処理方法は、鋼材の酸
洗い処理で排出された硝弗酸系廃液にカルシウム系薬剤
を添加して中和処理し、該硝弗酸系廃液に含まれている
ふっ素成分をふっ化カルシウムからなるスラッジとして
沈澱させ、ふっ素希薄廃液を得る第１工程と、
第１工程で発生する該ふっ素希薄廃液と該鋼材の酸洗い
処理で排出された硫酸系廃液の少なくとも一部とを混ぜ
合わせて混合廃液とし、該混合廃液にカルシウム系薬剤
を添加Ｕて中和処理し、該混合廃液中に残留しているふ
っ素成分をＦａ酸カルシウムと共にふっ化カルシウムと
して共沈澱させ第２工程とを順次実施する。Means for Solving Problem L] The method for treating steel pickling waste liquid according to the present invention involves adding a calcium-based chemical to the nitrofluoric acid waste liquid discharged from the pickling process of steel materials to neutralize it. , a first step in which the fluorine components contained in the nitric-fluoric acid waste solution are precipitated as a sludge consisting of calcium fluoride to obtain a diluted fluorine waste solution, and the acid in the diluted fluorine waste solution generated in the first step and the steel material. At least a part of the sulfuric acid-based waste liquid discharged during the washing process is mixed to form a mixed waste liquid, and a calcium-based chemical is added to the mixed waste liquid to neutralize it to remove the fluorine components remaining in the mixed waste liquid. The second step of co-precipitating calcium fluoride with calcium Fa acid is carried out one after another.
第１工程では、鋼材の醇洗い処理で排出された硝弗酸系
廃液にカルシウム系薬剤を添加して中和処理する工程で
ある。ここで中和処理とは、酸性物質としての硝弗酸系
廃液と塩基性物質としてのカルシウム系薬剤とを反応さ
せて塩を生じさせる反応をいう。このように第１工程を
行えば、硝弗酸系廃液に含まれているふっ素成分をぶつ
化カルシウム（ＦＣａ ）として沈澱することができ、
従ってふう化カルシウムからなるスラッジと、ふつそ成
分が希薄となったふっ素希薄廃液とに分離することがで
きる。In the first step, a calcium-based chemical is added to the nitric-fluoric acid-based waste liquid discharged from the washing process of steel materials to neutralize it. Here, the neutralization treatment refers to a reaction in which a nitrofluoric acid waste liquid as an acidic substance and a calcium-based drug as a basic substance are reacted to produce a salt. By performing the first step in this manner, the fluorine components contained in the nitrofluoric acid waste liquid can be precipitated as calcium fluoride (FCa),
Therefore, it is possible to separate the sludge consisting of calcium fluoride and the fluorine diluted waste liquid in which the normal components are diluted.
この場合、カルシウム系薬剤としては、炭化カルシウム
（Ｃａ ＣＯ３） 、酸化カルシウム（ＣａＯ）、水酸
化カルシウム（Ｃａ （ＯＨ）２ ）を主要成分とす
るものを使用することができる。例えば、製鋼工場で排
出されるカーバイト滓、消石灰を用いることができる。In this case, as the calcium-based drug, one whose main components are calcium carbide (CaCO3), calcium oxide (CaO), and calcium hydroxide (Ca(OH)2) can be used. For example, carbide slag and slaked lime discharged from steel factories can be used.
カルシウム系薬剤は、粒径が０．００１〜０．１１１１
１程度のものを用いることができる。Calcium-based drugs have a particle size of 0.001 to 0.1111
1 can be used.
第２工程では、第１工程で発生するふっ素希薄廃液と、
鋼材の酸洗い処理で排出された硫酸系廃液の少なくとも
一部を混ぜ合わせて混合廃液とし、更に、この混合廃液
にカルシウム系薬剤を添加して中和処理する工程である
。このように第２工程を行えば、ふつそ希薄廃液中に残
留しているふっ素成分が硫酸カルシウムと共にぶつ化カ
ルシウムとして共沈澱する。ここで、硫酸カルシウムは
、細かい沈澱であるため、共沈作用で、ぶつ化カルシウ
ムを共沈させることができる。第２工程で用いるカルシ
ウム系薬剤としては、第１工程で用いたものと同一のも
のを用いることができる。特にカーバイト滓がコストの
而から望ましい。In the second step, the fluorine diluted waste liquid generated in the first step,
This is a process in which at least a portion of the sulfuric acid-based waste liquid discharged from the pickling treatment of steel materials is mixed to form a mixed waste liquid, and a calcium-based chemical is further added to the mixed waste liquid for neutralization. When the second step is carried out in this manner, the fluorine component remaining in the diluted waste liquid is co-precipitated together with calcium sulfate as calcium fragments. Here, since calcium sulfate is a fine precipitate, calcium sulfate can be coprecipitated by a coprecipitation effect. As the calcium-based drug used in the second step, the same one used in the first step can be used. Carbide slag is particularly desirable from the viewpoint of cost.
［発明の効果］
本発明に係る鋼材の酸洗い廃液の処理方法によれば、硝
弗酸系廃液中のふっ素成分を第１工程で低減させ、第２
工程で更に一層低減させるため、廃液中のふっ素含有聞
を激減することができる。[Effects of the Invention] According to the method for treating steel pickling waste liquid according to the present invention, the fluorine component in the nitrofluoric acid waste liquid is reduced in the first step, and the fluorine component in the nitrofluoric acid waste liquid is reduced in the first step, and
Since the fluorine content is further reduced in the process, the fluorine content in the waste liquid can be drastically reduced.
［実施例］
本実施例は、ステンレス鋼材の酸洗い処理工程で排出さ
れる駿洗い廃液の処理方法に適用した場合である。第１
図にその流れ図を示す。[Example] This example is applied to a method for treating a pickling liquid discharged in a pickling treatment process for stainless steel materials. 1st
The flowchart is shown in the figure.
（！！洗い処理）
まず、ステンレス鋼材の酸洗い処理工程で用いられる硝
弗酸および硫酸をそれぞれ硝弗酸槽および硫酸槽に貯溜
する。そして、硝弗酸槽、硫酸槽のそれぞれにステンレ
ス鋼材を浸漬して、ステンレス鋼材の酸洗い処理を行う
。(!!Washing Process) First, nitric-fluoric acid and sulfuric acid used in the pickling process of stainless steel materials are stored in a nitric-fluoric acid tank and a sulfuric acid tank, respectively. Then, the stainless steel material is immersed in each of the nitric-fluoric acid tank and the sulfuric acid tank to perform pickling treatment on the stainless steel material.
（第１工程）
次に、第１工程として、酸洗い処理で排出された硝弗酸
系廃液および硫酸系廃液をそれぞれ別の受槽に貯溜する
。硝弗酸系廃液は、ＰＨが０−０゜２程度であり、その
硝弗酸濃度Ｇ、ｔ ４％程度である。(First Step) Next, as a first step, the nitric-fluoric acid waste liquid and the sulfuric acid waste liquid discharged from the pickling treatment are stored in separate receiving tanks. The nitric-fluoric acid waste liquid has a pH of about 0-0°2, and a nitric-fluoric acid concentration G, t of about 4%.
硫酸系廃液は、ＰＨがＯ−０，２程度であり、その硫酸
濃度は５．５％程度である。The sulfuric acid waste liquid has a pH of about O-0.2 and a sulfuric acid concentration of about 5.5%.
そして、硝弗酸系廃液を貯溜した受１ａ内にカルシウム
系薬剤としてのカーバイト滓を添加して中和処理する。Then, carbide slag as a calcium-based chemical is added to the receiver 1a in which the nitric-fluoric acid-based waste liquid is stored for neutralization.
この場合受槽内に貯溜されている硝弗酸系廃液のＲは約
２１／ｍ３程度である。カーバイト滓のカルシウム含有
量は８８〜９°３重■％程度であり、カーバイト滓全体
として５００ｋｃｘ添加した。このように第１工程を行
えば、硝弗酸系廃液に含まれているふっ素成分をぶつ化
カルシウム（ＦＣａ）からなるスラッジとして沈澱させ
ることができ、したがってスラッジとふっ素希薄廃液と
に分離することができる。なお、第１工程で生じたスラ
ッジは搬出する。又、第１工程で生じたふっ素希薄廃液
中に含まれているふっ素含有墳は３７〜７０ｐｐｍＰｉ
！度であり、中和処理前に比べて低減している。なお、
第１工程を第１図においてＡで区画して示す。In this case, R of the nitrofluoric acid waste liquid stored in the receiving tank is about 21/m3. The calcium content of the carbide slag was approximately 88-9°3% by weight, and 500 kcx was added to the carbide slag as a whole. By carrying out the first step in this manner, the fluorine components contained in the nitrofluoric acid waste liquid can be precipitated as a sludge consisting of calcium fluoride (FCa), and therefore can be separated into the sludge and the fluorine diluted waste liquid. Can be done. Note that the sludge produced in the first step is carried out. In addition, the fluorine-containing mound contained in the fluorine-diluted waste liquid generated in the first step has a concentration of 37 to 70 ppm Pi.
! degree, which is lower than before neutralization treatment. In addition,
The first step is shown divided by A in FIG.
（第２工程）
次に第２工程では、第１工程で発生するふっ素含有吊が
３７〜７０ｐｐｍ程度のふっ素−１Ｉｌｉ薄廃液と、鋼
材の酸洗い処理で排出された硫酸系廃液の一部とを、混
ぜ合せて混合廃液とし、この混合廃液中にカルシウム系
薬剤としてのカーバイト滓を添加する。このカーバイト
滓は第１工程で用いたものと同じものを用いた。第２工
程で用いるカーバイト滓は９０に９程度である。又、混
合廃液をつくるべく、ふっ素希薄廃液に混ぜ合せた硫酸
系廃液は１５０文程度である。このように第２工程を行
えば、ふっ素希薄廃液中に残留しているふっ素成分は、
ぶつ化カルシウムとして硫酸カルシウムとともに共沈澱
するため、廃液中のふっ素成分を激減することができる
。そして共沈澱した硫酸カルシウム及びふり化カルシウ
ムはスラッジとして搬出し、ふっ素成分が激減した廃液
は放流する。(Second process) Next, in the second process, the fluorine-1Ili thin waste liquid with a fluorine content of about 37 to 70 ppm generated in the first process and a part of the sulfuric acid waste liquid discharged from the pickling treatment of steel materials are combined. are mixed to form a mixed waste liquid, and carbide slag as a calcium-based drug is added to this mixed waste liquid. This carbide slag was the same as that used in the first step. The carbide slag used in the second step is about 9 in 90. In addition, the amount of sulfuric acid waste liquid that was mixed with the fluorine diluted waste liquid to create a mixed waste liquid was approximately 150 tons. If the second step is performed in this way, the fluorine components remaining in the fluorine diluted waste liquid will be removed.
Since it co-precipitates with calcium sulfate as calcium butt, it is possible to drastically reduce the fluorine content in the waste liquid. Then, the co-precipitated calcium sulfate and calcium fluoride are carried out as sludge, and the waste liquid, whose fluorine content has been drastically reduced, is discharged.
ところで、ステンレス鋼材の表面処理では、酸洗い処理
後に、水洗い、高圧水洗いを行うため、それぞれ水洗い
（Ｕ廃水、高圧水洗い後廃水が生じる。水系処理工程を
第１図にＣとして区画する。By the way, in surface treatment of stainless steel materials, water washing and high-pressure water washing are performed after pickling treatment, so water washing (U wastewater and wastewater after high-pressure water washing are generated).The water-based treatment process is divided as C in Fig. 1.
この場合、この水洗い後廃水及び高圧水洗い後廃水を混
合して廃水受槽に貯溜するものである。ここで、廃水受
槽中にはふっ素成分が３５〜８５ｐＤｍｆ９度と若干残
留する恐れがある。その理由は、ステンレス鋼材を表面
処理すべく、硝弗酸を貯溜した受槽にステンレス鋼材を
浸漬し浸漬摂に吊り上げる際に、ステンレス鋼材に付着
していた硝弗酸液がステンレス鋼材を流下してこれが廃
水受槽中に流れ込むことがあるからである。In this case, the wastewater after washing with water and the wastewater after high-pressure washing are mixed and stored in a wastewater receiving tank. Here, there is a possibility that some fluorine components remain in the wastewater receiving tank, at 35 to 85 pDmf9 degrees. The reason for this is that when the stainless steel material is immersed in a tank containing nitric-fluoric acid and then lifted up in order to surface-treat the material, the nitric-fluoric acid solution adhering to the stainless steel material flows down the stainless steel material. This is because this may flow into the wastewater receiving tank.
そこで、本実施例に係るｌｌ！ｌ理方法では、第１図の
矢印りで示すごとく、ステンレス鋼材の酸洗い処理で排
出された硫酸系廃液の一部を廃水受槽に流し込む。この
ように流し込んだ状態で、カルシウム系薬剤としてのカ
ーバイト滓を添加すれば、前述同様に、廃水中に残留し
ているふっ素成分をふっ化カルシウムとして硫酸カルシ
ウムをともに共沈させることができる。廃水処理系で用
いるカーバイト滓は、第１工程や第２工程で用いたもの
を使用できる。上記したように本実施例では、廃水中に
含まれるふっ素含有壜も４〜６．５ｐｐｍ程ｌαと激減
させることができる。Therefore, ll! according to this embodiment! In the method, a portion of the sulfuric acid-based waste liquid discharged during the pickling treatment of stainless steel materials is poured into a wastewater receiving tank, as indicated by the arrow in FIG. By adding carbide slag as a calcium-based chemical to the poured wastewater, the fluorine component remaining in the wastewater can be converted into calcium fluoride and calcium sulfate can be co-precipitated with it, as described above. The carbide slag used in the wastewater treatment system can be the same as that used in the first step or the second step. As described above, in this embodiment, the amount of fluorine-containing bottles contained in wastewater can be drastically reduced to about 4 to 6.5 ppm lα.
第１図は本実施例に係る処理工程を示す流れ図である。 FIG. 1 is a flowchart showing the processing steps according to this embodiment.
Claims (2)
ルシウム系薬剤を添加して中和処理し、該硝弗酸系廃液
に含まれているふっ素成分をふっ化カルシウムからなる
スラッジとして沈澱させ、ふっ素希薄廃液を得る第１工
程と、 第１工程で発生する該ふっ素希薄廃液と該鋼材の酸洗い
処理で排出された硫酸系廃液の少なくとも一部とを混ぜ
合わせて混合廃液とし、該混合廃液にカルシウム系薬剤
を添加して中和処理し、該混合廃液中に残留しているふ
っ素成分を硫酸カルシウムと共にふっ化カルシウムとし
て共沈澱させる第２工程とを順次実施することを特徴と
する鋼材の酸洗い廃液の処理方法。(1) Calcium-based chemicals are added to neutralize the nitric-fluoric acid waste fluid discharged during the pickling process of steel materials, and the fluorine components contained in the nitric-fluoric acid waste fluid are converted into sludge consisting of calcium fluoride. a first step of obtaining a fluorine-dilute waste solution by precipitating the fluorine-diluted waste solution; and a mixed waste solution by mixing the fluorine-diluted waste solution generated in the first step with at least a part of the sulfuric acid-based waste solution discharged from the pickling treatment of the steel material. , a second step of adding a calcium-based chemical to the mixed waste liquid to neutralize it, and co-precipitating the fluorine component remaining in the mixed waste liquid as calcium fluoride with calcium sulfate, are sequentially carried out. A method for treating waste liquid from pickling steel materials.
＿３）、酸化カルシウム（ＣａＯ）、水酸化カルシウム
（Ｃａ（ＯＨ）＿２）を主要成分とする特許請求の範囲
第１項記載の鋼材の酸洗い廃液の処理方法。(2) Calcium-based drugs include calcium carbide (CaCO
_3) The method for treating steel pickling waste liquid according to claim 1, which contains calcium oxide (CaO) and calcium hydroxide (Ca(OH)_2) as main components.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22906586A JPS6384691A (en) | 1986-09-27 | 1986-09-27 | Treatment of waste pickling liquid of steel products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22906586A JPS6384691A (en) | 1986-09-27 | 1986-09-27 | Treatment of waste pickling liquid of steel products |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6384691A true JPS6384691A (en) | 1988-04-15 |
Family
ID=16886186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22906586A Pending JPS6384691A (en) | 1986-09-27 | 1986-09-27 | Treatment of waste pickling liquid of steel products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6384691A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003080270A (en) * | 2001-09-12 | 2003-03-18 | Okutama Kogyo Co Ltd | Method for treating fluorine-containing waste water |
| JP2007196177A (en) * | 2006-01-30 | 2007-08-09 | Nippon Steel & Sumikin Stainless Steel Corp | Method for treating fluorine-containing liquid waste |
| CN102923751A (en) * | 2012-11-06 | 2013-02-13 | 荣殿相 | Method for producing plaster fiber by using carbide slurry |
| CN106311719A (en) * | 2016-08-22 | 2017-01-11 | 四川龙蟒钛业股份有限公司 | Recycling method for carbide slag |
| CN107337227A (en) * | 2017-04-26 | 2017-11-10 | 安徽华塑股份有限公司 | A kind of recovery process that calcium sulfate is prepared using carbide slag |
| CN108726553A (en) * | 2018-06-19 | 2018-11-02 | 青海盐湖工业股份有限公司 | A kind of system producing calcium sulfate using carbide slag and Waste Sulfuric Acid |
| CN109201703A (en) * | 2018-09-17 | 2019-01-15 | 新疆生产建设兵团第八师天山铝业股份有限公司 | A kind of curing agent of electrolytic aluminium slag from delining soluble fluorine |
-
1986
- 1986-09-27 JP JP22906586A patent/JPS6384691A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003080270A (en) * | 2001-09-12 | 2003-03-18 | Okutama Kogyo Co Ltd | Method for treating fluorine-containing waste water |
| JP2007196177A (en) * | 2006-01-30 | 2007-08-09 | Nippon Steel & Sumikin Stainless Steel Corp | Method for treating fluorine-containing liquid waste |
| CN102923751A (en) * | 2012-11-06 | 2013-02-13 | 荣殿相 | Method for producing plaster fiber by using carbide slurry |
| CN106311719A (en) * | 2016-08-22 | 2017-01-11 | 四川龙蟒钛业股份有限公司 | Recycling method for carbide slag |
| CN107337227A (en) * | 2017-04-26 | 2017-11-10 | 安徽华塑股份有限公司 | A kind of recovery process that calcium sulfate is prepared using carbide slag |
| CN108726553A (en) * | 2018-06-19 | 2018-11-02 | 青海盐湖工业股份有限公司 | A kind of system producing calcium sulfate using carbide slag and Waste Sulfuric Acid |
| CN109201703A (en) * | 2018-09-17 | 2019-01-15 | 新疆生产建设兵团第八师天山铝业股份有限公司 | A kind of curing agent of electrolytic aluminium slag from delining soluble fluorine |
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