Method for extracting iron from modified molten copper slag and preparing ceramic using tailings of modified molten copper slag

Abstract

The invention provides a method for extracting iron from modified molten copper slag and preparing ceramic using tailings of modified molten copper slag, and belongs to the technical field of resourceutilization and environmental protection. The method comprises the steps that by taking molten copper slag as a raw material, a modifier containing alkali metal oxide is added in a molten state of the copper slag, or the atmosphere of the molten copper slag is simultaneously controlled in a blowing gas mode, so that an iron-containing phase of the molten copper slag is transformed into magnetitethrough modification, and after magnetic minerals such as the magnetite are fully crystallized and grown up, the modified molten copper slag is cooled; and he cooled copper slag is subject to crushingand magnetic separation treatment to obtain iron fine powder and the tailings; and the tailings containing the alkali metal oxide is utilized as a ceramic raw material to prepare a ceramic material.According to the method for the extracting the iron from the modified molten copper slag and preparing the ceramic using the tailings of the modified molten copper slag, high-temperature heat energy of furnace slag melts the modifier, the composition and the structure of the slag are changed by reasonably controlling the temperature, the additive and the movement behaviors of fluids, so that the valuable components in the slag are recycled, and the separated tailings are used as the raw materials for preparing the ceramic, and a ceramic product is further prepared.

Description

technical field

[0001] The invention relates to the technical field of resource utilization and environmental protection, in particular to a method for preparing ceramics by modifying molten copper slag to improve iron and its tailing slag. Background technique

[0002] In recent years, with the rapid development of my country's economic construction, a large amount of non-ferrous metallurgical waste slag has been produced in the process of industrial production, and the copper slag is the slag produced in the process of copper smelting. Strengthening the utilization of secondary resources is the development direction of the metallurgical industry, especially the copper slag with a total iron content of 30-50wt%, which is a solid waste generated during the copper smelting process, and the green recycling of iron resources and tailings is an existing technology difficulty. According to incomplete statistics, my country's copper smelting enterprises produce 1,000 tons of copp...