Nanjing Institute of Environmental Sciences, Mee

Jiangsu Arit New Materials Co., Ltd.

Yi Wang

Shanshan Qian

Chunyang Zheng

Houhu Zhang

Chunman Huang

Jiezhong Gan

Haidong Jiang

Bing Ma

Guodong Kang

Hao Zhou

Mengting Li

Ying Qiu

Xiaowei Xu

Zhaolai Guo

Yuanshun Xu

Gaoming Wang

A production device for preparing a building material using a fine particle silt in iron tailings includes an operation desk and a grinding device. During movement of edge plates, gears are located inside a side groove and keep meshing with toothed grooves, the edge plates will drive various gears to rotate along a same direction and drive grinding balls and connecting shafts to rotate while moving, the grinding balls will perform grinding treatment on the fine particle silt at the inner end of the grinding cabinet while rotating.

Production device for preparing building material using fine particle silt in iron tailings

The present invention discloses a preparation method of a polycarboxylate superplasticizer with carbon dioxide, comprising the following steps: (1) preparing a polycarboxylate superplasticizer prepolymer: performing an oxidation-reduction radical polymerization of an unsaturated macromonomer, an unsaturated phenol derivative, a reducing agent, an initiator and a chain transfer agent with different proportions under a nitrogen atmosphere to obtain a novel polycarboxylate superplasticizer prepolymer with different molecular weight; adjusting the pH by adding an alkali; (2) preparing a polycarboxylate superplasticizer: performing a Koble-Schmitt reaction between the polycarboxylate superplasticizer prepolymer and a carbon dioxide for a certain time to obtain the polycarboxylate superplasticizer. The polycarboxylate superplasticizer prepared by the method of the present invention retains the advantages of the existing water-reducing admixture of the polyether monomer compounds, and the production process is simple, safe, controllable, less side effect and has a better cost effective and competitive advantage.

Preparation method of polycarboxylate superplasticizer with carbon dioxide

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Nanjing, China

Yi Wang