Red mud modified cementing powder and preparation process thereof

Abstract

The invention relates to the technical field of cementing powder production, in particular to red mud modified cementing powder and a preparation process thereof. The red mud modified cementing powderis prepared from the following raw materials in percentage by weight: 37 percent of red mud, 10 percent of kaolin, 5 percent of lime, 8 percent of cement, 15 percent of mineral powder, 22 percent offurnace slag and 3 percent of excitant. The method has the advantages that: 1, the cost is low, the preparation process is simple, a large amount of energy consumption is not needed, red mud and furnace slag in the raw materials are industrial solid waste, the cost is zero, and the total unit cost is 30%-40% lower than that of a traditional formula; 2, the used materials are easy to obtain, the production line flow is simple and clear, the unit energy consumption required by production is low, and large-scale production is easy; 3, the red mud modified cementing powder product has the characteristics of reasonable setting time and high fluidity of prepared slurry, a pipeline is not easy to block, and the 3-day and 28-day strength indexes are higher than those of the cementing powder product in the market by 30%.

Description

technical field [0001] The invention relates to the technical field of glue powder production, in particular to a red mud modified glue powder and a preparation process thereof. Background technique [0002] With the continuous development of the modern mining industry and the continuous strengthening of the protection of the environment and resources, the subsidence of many old mining areas is very serious, and accidents in new mines continue to occur, and many new mines have hidden dangers of accidents. It is imminent and the general trend to backfill, transform and reinforce empty areas. [0003] Cement powder is a product specially designed for backfilling and reinforcement of goafs in various mines. The basic method of use is to mix the cement powder with the tailings in the local mining area in a certain proportion, add a certain amount of water and mix, and after solidification Forms a strong product. [0004] In the traditional process, 325 or 425 grade cement is d...

AI Technical Summary

Problems solved by technology

[0006] (1) The cost remains high;

[0007] (2) The mixing ratio of cement powder and tailings is 1:4-1:6, which has low efficiency and further increases the cost;

[0008] (3) The early strength index of the glue solid powder is weak, and the curing time is slow, which brings a lot of inconvenience to the mine construction