Preparation and mechanism of the sintered bricks produced from Yellow River silt and red mud

被引：89

作者：

He, Hongtao ^{[1
]}

Yue, Qinyan ^{[1
]}

Su, Yuan ^{[1
]}

Gao, Baoyu ^{[1
]}

Gao, Yue ^{[1
]}

Wang, Jingzhou ^{[1
]}

Yu, Hui ^{[1
]}

机构：

[1] Shandong Univ, Shandong Key Lab Water Pollut Control & Resource, Sch Environm Sci & Engn, Jinan 250100, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2012年 / 203卷

关键词：

Yellow River silt; Red mud; Sintered Brick; Weight loss mechanism; Shrinkage mechanism; CERAMIC INDUSTRY; BAYER PROCESS; REMOVAL;

D O I：

10.1016/j.jhazmat.2011.11.095

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The preparation, characteristics and mechanisms of sintered bricks manufactured by Yellow River silt and red mud were studied. The sintering shrinkage, weight loss on ignition, water absorption and compressive strength were tested to determine the optimum preparation condition. Sintering mechanisms were discussed through linear regression analysis. Crystalline components of raw materials and bricks were analyzed by X-ray diffraction. Leaching toxicity of raw materials and bricks were measured according to sulphuric acid and nitric acid method. Radiation safety of the sintered bricks was characterized by calculating internal exposure index and external exposure index. The results showed that at the chosen best parameters (red mud content of 40%, sintering temperature of 1050 degrees C and sintering time of 2 h), the best characteristics of sintered bricks could be obtained. The weight loss on ignition of sintered bricks was principally caused by the removal of absorbed water and crystal water. The sintering shrinkage of sintered bricks mainly depended on sodium compounds and iron compounds of red mud. The sintering process made some components of raw materials transform into other crystals having better thermostabilily. Besides, the leaching toxicity and radioactivity index of sintered bricks produced under the optimum condition were all below standards. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：53 / 61

页数：9

共 34 条

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