Method for preparing building mortar from tailings

Abstract

The invention provides a method for preparing building mortar from tailings. The method comprises the following steps: directly injecting tailing slurry into a centrifugal dryer to remove water through spinning so as to obtain sand with a water content of 20%; then transferring the sand to a dryer for drying until the water content is 1%-2%; then conveying the sand to a cooling tower for cooling treatment and transferring the cooled sand to a vibration screening procedure to obtain qualified 120-to-300-mesh sand for subsequent usage; and preparing finished mortar by uniformly mixing, by mass,45-55 parts of the 120-to-300-mesh sand, 5 parts of 1-to-5-mm fly ash, 2 parts of fibers, 30 parts of cement, 3 parts of gypsum powder and 10 parts of rubber powder in a mixer under stirring, and thenpreparing bagged mortar by using a bagging machine. The method of the invention has the following advantages: waste produced in mining production is utilized, so the problem of environmental pollution is solved; and the building mortar has the advantages of high compressive strength, rapid curing speed, good water retention performance and crack resistance, and high alkali resistance and ultraviolet resistance, can be applied to a wet substrate, and is green and environmentally-friendly, and the performance indexes of the building mortar are in line with usage standards for sand.

Description

technical field [0001] The invention relates to a method for preparing building mortar by utilizing tailing sand. Background technique [0002] The sand materials used in traditional building materials are mostly sand and gravel in the river beach, which are screened and transported to the construction site, resulting in a large consumption of resources and serious damage to the ecological environment. With the rapid development of my country's economy, the construction of a large number of infrastructure has a great Therefore, new green building materials are the development direction of the construction industry under the new situation. In mining production, the output of tailings is large, and the stacking process takes up a lot of space. It is also easy to cause hidden dangers and environmental pollution. Therefore, tailings It is necessary to improve the utilization rate of resources for the comprehensive utilization of mines. Contents of the invention [0003] The pur...

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Problems solved by technology

[0002] The sand materials used in traditional building materials are mostly sand and gravel in the river beach, which are screened and transported to the construction site, resulting in a large consumption of resources and serious damage to the ecological environment. With the rapid development of my country's economy, the construction of a large number of infrastructure has a great Therefore, new green building materials are the development direction of the construction industry under the new situation. In mining production, the output of tailings is large, and the stacking process takes up a lot of space. It is also easy to cause hidden dangers and environmental pollution. Therefore, tailings It is necessary to improve the utilization rate of resources for the comprehensive utilization of mines

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