A process for producing high-quality sodium silicate using high-silicon iron ore

Abstract

A process for producing high-quality sodium silicate using ferrosilicon ore, comprising the following steps: 1) making reduced materials: making ferrosilicon ore into pellets to be sintered; 2) reducing pellets to be sintered: heating pellets to be sintered at high temperature 3) High-silicon tailings are selected by crushing and milling: crushing and reducing the pellets to obtain reduced crushed materials, using an ultra-fine milling device to grind the reduced crushed materials to obtain reduced powder, and magnetically separating the reduced powder to obtain high-silicon Tailings; 4) Extraction of sodium silicate solution: adding lye to the high-silicon tailings to obtain a solid-liquid mixture, and leaching the sodium silicate solution. The technical proposal provided by the application can reduce the production cost of sodium silicate and improve the production quality of sodium silicate.

Description

technical field [0001] The invention relates to a process for producing sodium silicate, in particular to a process for producing high-quality sodium silicate by using high-silicon iron ore, and belongs to the technical field of iron ore metallurgy. Background technique [0002] As of 2018, my country's iron ore reserves are about 47 billion tons, but 97% of them are lean ores, and the average iron grade is only 34.29%, which is 14 points lower than the world's average iron grade (48.24%). The average iron grade (56.07%) of the iron ore in Dakuang Mine is 22 points lower. This kind of ore has huge reserves in Hengyang, Ningxiang and other places in Hunan, my country. Only Dongkou iron ore reserves in Hengyang City reach 500-600 million tons. Even above -600 mesh, conventional beneficiation methods are difficult to obtain effective enrichment. [0003] The traditional pyrometallurgical processes for iron ore mainly include magnetization roasting, direct reduction (coal-based ...

AI Technical Summary

Problems solved by technology

At present, the gas-based method and some coal-based methods in the traditional direct reduction process need to use oxidized pellets, while the high-silicon and low-grade iron ore adopts oxidized pellets-the energy consumption per ton of iron in the direct reduction process is very large, which does not have the advantages of energy saving and environmental protection

Part of the coal-based reduction process can be produced using ore-coal composite pellets, but high-silicon iron ore will produce a large amount of fayalite under the high temperature conditions of traditional direct reduction, resulting in failure of iron recovery

Therefore, it is difficult to efficiently recover iron resources from high-silicon and low-grade iron ores

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