The accumulator action of a large number of W-Mo tailings and iron slags causes a waste of resources and damage to the environment. Using solid waste as raw material to produce building materials can achieve resource utilization. Water-permeable bricks can alleviate the problem of rainwater accumulation on city pavement. The composition of single solid waste makes it difficult to meet the need for water-permeable bricks, causing low compressive strength. The iron content increase can promote the formation of the Fe-rich phase, which adds grain boundary area in permeable brick, improving its anti-deformation and anti-fracture performance, thus improving the compressive strength. In this paper, we used the sintering method to prepare a highcompressive-strength water-permeable brick and used W-Mo tailings and iron slags as raw materials. We discussed the effects of sintering temperature and iron content on compressive strength, porosity, and permeability. We adjusted the ratio of raw materials and controlled the iron content of the green body to improve the compressive strength. The results show that under the condition of a sintering temperature of 1050℃ and iron content of 25%, the permeability coefficient of the water-permeable brick is 1.89×10-2 cm/s, and the compressive strength is 86.73 MPa.
The relevant research results are titled“Effect of iron Content on high strength environmentally friendly permeable brick prepared from tungsten and molybdenum tailings and copper slag”is published in The Journal of The Minerals, Metals & Materials Society（JCR Q2 IF=2.6）
Fig. 1. Pore changes during sintering.
Fig. 2. BSE images of water-permeable bricks prepared at different levels of iron: (a) 5%; (b)10%; (c) 15%; (d) 20%; (e) 25%; (f-j) BSE images of water-permeable bricks at different levels of iron.
Fig. 11. 3D images of water-permeable brick: (a) binarization images in XY direction by 3D-XRM of the prepared water-permeable bricks; (b) 3D distribution map of water-permeable bricks; (c) binarization images in ZY direction by 3D-XRM of the prepared water-permeable bricks.
Author:Hongrui Guan, Baojing Zhang, Jinbao Yang, Xue Zhan, Peizhong Feng
Link: https://link.springer.com/article/10.1007/s11837-023-06284-6
DOI: https://doi.org/10.1007/s11837-023-06284-6
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