 info@rqsulfates.com             +86-731-85864603

How to add ferrous sulfate to remove Hexavalent Chromium in cement manufacturing

Views: 75     Author: VV     Publish Time: 2018-11-12      Origin: Rech Chemical Co. LTD

facebook sharing button
twitter sharing button
line sharing button
wechat sharing button
linkedin sharing button
pinterest sharing button
sharethis sharing button

Chromium is serious metal contaminant. The chromium in cement mainly comes from the raw materials of industrial by-product and the process of burning. Recently, with the increasingly strict requirements in domestic environmental protection, ferrous sulphate is becoming more and more popular in removing Hexavalent Chromium during the production of cement. European cement manufactures purchases a large amount of ferrous sulfate from China every year to reduce hexavalent chromium in cement. However, most of our domestic cement manufacturers use ferrous sulfate solution to remove chromium, which is very costly. Recently, a lots of cement manufactures call us(Rech Chemical Co. LTD,) to find out, How to add ferrous sulfate to remove Hexavalent Chromium in cement manufacturing

The chromium presents in the form of hexavalent in cement. As far as we know, ferrous sulphate as reducing agent in production of cement. The common solutions are to add ferrous sulfate monohydrate granular or powder. Ferrous sulfate monohydrate granular usually added to the grinder together with the cement raw materials. For some manufacturers asked the powder over 300mesh, but the size of ferrous sulfate monohydrate is 80mesh. Another way is to stir ferrous sulphate monohydrate powder with finished cement product. 

At the same time, in the add ferrous sulfate, temperature is very important to reduce chrome. such as a water soluble hexavalent chromium content < 0.1 mg/kg of bagged cement at 20 to 25 , about 50% of the relative humidity can store 6 months, the water-soluble hexavalent chromium content was only 0.2 mg/kg, this is because ferrous sulfate dehydration and reduce reduced chromium solubility.



Rongqing Chemical Co., Ltd
 Address: Sunshine 100,Yue Lu District,Changsha,Hunan,China.
Tel: +86-731-85864603 
 Email : Info@rqsulfates.com 
 Skype: rech.chemical 
Website: www.rqsulfates.com

Friendly links: China Manganese sulfate manufacturer
        Changsha Rongqing Chemical Co. Ltd specializing ferrous sulfate,manganese sulfate,zinc sulfate,magnesium sulfate and copper sulfate,which certified ISO 9001,FAMI-QS & finished EU REACH registration 
Copyright ©Rongqing Chemical Co. Ltd  All Rights Reserved.