What is the preparation process for iron tailings mortar?

Iron tailings are waste after mineral processing and are the main component of industrial solid waste. Among the currently used masonry mortars, the main gelling component is Portland cement, or slag cement and fly ash cement are made from Portland cement clinker mixed with some mineral powder, fly ash, and limestone powder. and composite cement. Although this type of cementitious material has a certain mechanical strength when preparing masonry mortar, its production process is complex and the production cost is high. Iron tailings powder and blast furnace slag powder are industrial solid wastes. If their potential activity can be used to prepare masonry mortar, it will not only benefit the reuse of solid wastes, but also protect the environment. The Guikuang vertical mill produced by Guikuang Machinery provides grinding equipment to assist the iron ore tailings mortar preparation process.

The raw materials of masonry mortar include cementing materials, water, and fine aggregate. The weight ratio of each component is 1:2.5-2.7:4. The cementing materials include iron tailings powder, slag powder, quicklime, desulfurization ash, early It is composed of strong agent and admixture. Iron tailings mortar preparation process: Iron tailings are ground to a specific surface area of 107m2/kg and a fineness modulus of 1.2. The specific surface area of slag grinding through vertical mill is 400-420m2/kg, and the fineness modulus is 0.98. The early strengthening agent is Glauber’s salt. The admixture is a compound high-efficiency water reducing agent. The fine aggregate is standard sand with a particle size range of 0-2.36mm. Mix iron tailings powder, slag powder, quicklime, desulfurization ash and Glauber’s salt with a mixer at normal temperature and pressure, then add fine aggregate, water reducing agent and water, and stir for 6 minutes to obtain a masonry mortar that meets the performance indicators.

Using iron tailings powder and slag micropowder as the main raw materials to prepare iron tailings powder-slag micropowder masonry mortar is not only operable, has less on-site pollution, but also ensures the stability of the quality of the masonry mortar from the source. While meeting the performance requirements of masonry mortar, the preparation cost is greatly reduced. The iron ore tailings mortar preparation process requires grinding the iron tailings and slag to a suitable specific surface area, which requires the assistance of a vertical mill.