最近中文字幕大全在线看,h高潮嗯啊娇喘抽搐视频a片小说 ,和尚吮她的花蒂和奶水视频,亚洲人成网站999久久久综合

Products Current Location: Home > Products > Products

Electrolyte Purification

The Steuler Electrolyte Purification (SEP) process is based on the reduction of chrome(VI) compounds

and extends the lifetime of an electrolyte.

 

For the pretreatment in pickling plants for stainless steel wire an electrolytic pickling process is often employed using a solution of approx. 20% sodium sulfate. The electrolyte itself is not used up during

this process. Such metals as iron(III), nickel(II) and chrome(III) are precipitated out into the neutral solution as metal hydroxides. To achieve a longer service life for the electrolytes, also the chrome(VI) compounds formed by oxidation, which cannot be removed directly as suspended solids, have to be eliminated from the electrolyte.

 

Process description:
The reduction process is based on the reduction of chrome (VI) by employing such reduction agents

as hydrogen peroxide or sodium bi-sulfite at a low pH value.

 

First there occurs a pH-controlled addition of sulfuric acid to lower the pH value. At the same time, the reduction agent is dosed rh-dependently to reduce the chrome (VI) to chrome (III).

 

After that, the liquid is neutralized using caustic soda and the dissolved metals are precipitated out as metal hydroxides. The particles form flakes, precipitate and are then dewatered in a chamber filter press.
The dose-added caustic soda and sulfuric acid form new electrolytic solution to compensate for losses in the filter cake water and for those caused by dissipation on the surface of the belt.

 

The main benefits are:
— High regeneration rate of the neutral electrolytes
— Savings in operational costs due to less formation of residue sludge that has to be disposed in the waste water treatment plants
— Simple construction of plant and use of tried-and-tested equipment
 

Copyright ? 2016 Shanghai History channel than LeBow Engineering Co., Ltd 滬ICP備16020502號(hào) Site Map | Legal Notices
50多岁岳不让我戴套| 亚洲精品国产精品| 暴虐sm灌浣肠调教| 99精品人妻无码专区在线视频| 第一次啪要猛j还是要温柔点| 久久久久久精品国产亚洲| 一本加勒比hezyo无码资源网| 男女多p混交群体交乱a片小说| 老师洗澡时让我进去摸她那个| 熟女俱乐部五十路六十路av| 成人午夜特黄aaaaa片男男| 久久鸭和久久丫是不是一个品牌| 视频一区二区三区sm重味| 国产三级视频在线观看| 张开双腿高潮喷水抽搐| 高h全肉np放荡日记| 五月天激情国产综合婷婷婷| 国产刺激对白 国产情侣| 国模精品一区二区三区 | 真人性囗交69图片| 无套内谢少妇毛片a片小说| bgmbgmbgm老太太视频| 男男调教惩罚做到哭play| 艳肉观音性三级dvd| 欧美巨鞭大战丰满少妇 | 国产69久久精品成人看| 亚亚洲精品黑人巨大在线播放| 国产在视频线精品视频| 熟妇人妻中文字幕| 強姦犯された人妻たち| 500杂烩大乱炖目录| 无遮掩60分钟从头啪到尾| 亚洲狠狠婷婷综合久久久久图片| 永久免费40分钟看大片| 裸身美女无遮挡永久免费视频| 肉乳床欢无码a片| 老扒夜夜春宵第一部| 欧美大屁股眼子xxxxx视频| 色情a片做爰片| 曰批国产精品视频免费观看 | 狠狠婷婷综合久久久久久|