Method for preparing high-modulus water glass from iron tailings

Abstract

The invention aims to improve the utilization rate of waste iron tailings, provides a method for preparing high-modulus water glass from iron tailings, and belongs to the technical field of water glass preparation. The method comprises the steps of 1) adding the iron tailings and liquid alkali into a reaction kettle in proportion, adding an activated catalyst SY-1, and carrying out closed reaction, wherein the catalyst SY-1 is a compound containing vanadium and phosphorus; and 2) filtering the material after the reaction is finished to obtain a liquid, namely, a water glass product with the modulus of 2.5-3.5. The method is low in energy consumption and simple to operate, and solves the environmental and recycling problems of the industrial solid waste iron tailings. The modulus range of the water glass prepared by the method is 2.5-3.5, so that the comprehensive utilization degree of the iron tailings is improved, and a new way is provided for effective utilization of silicon dioxidein the iron tailings.

Description

technical field

[0001] The invention belongs to the technical field of water glass preparation, in particular to a method for preparing high modulus water glass by using iron tailings. Background technique

[0002] Iron tailings are the particulate solid powder remaining after the ore is crushed, flotation and other processes, and it is an important industrial solid waste. The tailings dam formed by a large number of tailings occupies a large amount of land; at the same time, due to the small particle size, light weight, large surface area of ​​tailings, and easy flow and collapse when stacking , soil pollution, land degradation, desertification, salinization, and ecosystem degradation; tailings contain high levels of harmful substances, and tailings ponds also harm nearby water sources.

[0003] At present, the comprehensive utilization rate of tailings in my country is relatively low, and the main utilization direction is the construction field. Therefore, it is necessar...