Inorganic Chemicals Industry >
Study on properties of wet detoxification Fe-Cr slag as concrete admixture
Received date: 2021-05-18
Online published: 2022-03-18
Fe-Cr slag is an industrial waste produced after using chromite as raw material to produce metal chromium and chromium salts.After wet detoxification by FeSO4,the Fe-Cr slag still has certain volcanic ash activity,which can be used as concrete mineral admixture.However,the water-soluble Cr(Ⅵ) in wet detoxification of Fe-Cr slag affects the utilization of building materials resources.The particle size distribution and volcanic ash activity of the wet detoxification Fe-Cr slag were studied.The wet detoxification Fe-Cr slag was used as mineral admixture instead of fly ash in C30 concrete.The working properties,mechanical properties and leaching amount of water-soluble Cr(Ⅵ) of concrete were investigated.The results sho-wed that the particle size of the wet detoxification Fe-Cr slag was mainly distributed in the range of 1~20 μm,and the activity index of 28 d reached 68%.When the fly ash was replaced by 20% by the wet detoxification Fe-Cr slag,the slump of concrete increased by 38.2%,and the strength of concrete at 7 d and 28 d increased by 7% and 6%,respectively.The amount of water soluble Cr(Ⅵ) was different according to the different standard.Wet detoxification Fe-Cr slag may be used as mineral admix-ture,but the leaching of water-soluble Cr(Ⅵ) should be considered to ensure the safe use of concrete.
Yuan WANG , Zhi WANG , Hongyi QIN . Study on properties of wet detoxification Fe-Cr slag as concrete admixture[J]. Inorganic Chemicals Industry, 2022 , 54(3) : 87 -90 . DOI: 10.19964/j.issn.1006-4990.2021-0327
[1] | 韩露, 谭建红, 刘思琪. 铬渣的环境危害及其治理技术研究[J]. 广州化工, 2016, 44(6):10-11,24. |
[2] | 庆朋辉, 董玉明, 王兴润, 等. 铬铁矿无钙焙烧铬渣的深度提铬与无害化处理[J]. 无机盐工业, 2020, 52(6):63-67,104. |
[3] | 周斌, 石燕, 邵煜锟, 等. 湿法解毒技术对铬渣污染土壤的修复效果研究[J]. 中国环保产业, 2021(1):53-57. |
[4] | 史建斌. 铬渣无害化处理方案优化探讨[J]. 无机盐工业, 2013, 45(6):4-7. |
[5] | 陈窈君, 李来顺, 吕正勇, 等. 湿法解毒还原工艺对铬渣中Cr(Ⅵ)的治理特性[J]. 环境工程, 2020, 38(6):67-74. |
[6] | 张大威, 李霞, 纪柱. 铬铁矿无钙焙烧工艺参数控制研究[J]. 无机盐工业, 2012, 44(6):37-39. |
[7] | 原金海, 倪艳兵, 李娟娟. 铬渣解毒及其综合利用技术研究进展[J]. 重庆科技学院学报:自然科学版, 2008(6):59-62,71. |
[8] | 刘曦. 铬渣湿法解毒工艺研究[J]. 化工管理, 2014(33):163-164. |
[9] | 吕辉. 铬渣作水泥原料及混合材的试验研究[J]. 水泥, 2005(11):8-10. |
/
〈 |
|
〉 |