Buring free, steaming free bearing building blocks or bricks prepared from tailing sand of iron ore, and manufacturing process

Abstract

A load-bearing building block or brick is prepared from iron ore tailings (20-40 Wt%), broken stone (40-60), powdered coal ash (10-30), Portland cement (9.9-20) and water-reducing agent (0.1-1). Its making technology without calcining and steaming is also disclosed.

Description

technical field

[0001] The invention relates to a non-burning and non-steaming load-bearing block or brick and its manufacturing process, in particular to a non-burning and non-steaming load-bearing block or brick made of iron ore tailings and its manufacturing process, which belongs to the construction brick technology field. Background technique

[0002] In the mining process of our country, the treatment and application of mine tailings has always been a difficult problem in the mining process. At present, the extensive treatment method of mine tailings filling ditch and stacking is generally adopted. On the one hand, this method causes a large number of open-air stacking of tailings The destruction of surface vegetation causes pollution of the mine environment, leading to soil erosion and desertification. On the other hand, tailings resources are not utilized, and the utilization rate of the entire mine resource is low, resulting in a waste of national mine resources. A...