Process method for extracting rare metal oxides from slag ball waste generated in process of producing rock wool by using red mud

Abstract

The invention relates to the technical field of resource utilization of slag ball waste generated in the process of producing rock wool by using red mud and comprehensive utilization of the red mud, in particular to a process method for extracting rare metal oxides from slag ball waste generated in the process of producing rock wool by using red mud. The process method comprises the following steps that iron in the slag ball waste is thoroughly separated, and the slag ball waste is subjected to sufficient iron extraction treatment through a magnetic separation iron extraction method; the slagball crushed materials are fed into a slag ball crushed material turnover bin; the slag ball crushed materials are loaded into a standard stainless steel net cage and fed into a separation tank; a hydrochloric acid leaching solution metal oxide is extracted; and titanium and silicon oxides are separated in an acidolysis tank. According to the process, rare earth elements can be effectively extracted according to the principle of step-by-step separation and graded enrichment under the condition that a high additional value is generated in the process of producing the rock wool by using the redmud, the wastewater treatment amount is small, the requirements of energy conservation and environmental protection are met, new pollution is not generated in the whole process, and full and comprehensive utilization of the red mud is realized.

Description

technical field [0001] The present invention relates to the resource utilization of slag ball waste produced in the process of producing rock wool from red mud, and is also the technical field of comprehensive utilization of red mud, specifically, a slag ball waste produced in the process of producing rock wool with red mud A process for extracting rare metal oxides. The present invention relates to the process of utilizing red mud to produce inorganic fiber (i.e. rock wool), by collecting the slag balls thrown out from the four-roll centrifuge and falling into the pit when the fibers are centrifuged and the slag balls picked out by the cotton collection device, these The slag ball waste is naturally enriched with rare metal oxides such as titanium and scandium in the red mud during the high-temperature melting process of the red mud ingredients through an electric melting furnace, and the slag ball waste is reused to extract rare metal oxides. The development of the red mud ...

AI Technical Summary

Problems solved by technology

[0018] 2) Existing problems: To realize the industrialized recovery of scandium, titanium and rare earth metals in red mud, the key is to find an economical, energy-saving, environmentally friendly, and universally applicable process

①Reduction smelting method: Directly extract the trace rare earth element scandium with a content of only 0.0001% from red mud, which is difficult to imagine. Finally, extraction and other methods are used to extract scandium. The amount of wastewater to be treated is large and energy High consumption, no economic benefit

②Acid leaching process: In the acid leaching process of red mud, the acid consumption is too large, which is not conducive to environmental protection. If it is difficult to separate and extract rare earth metals by direct acid leaching, even if the experiment is successful, considering the economic benefits of industrial production, it is still Not advisable

High production cost, low scandium content and other reasons limit the expansion of scandium production scale

[0020] In the existing technology, including the process of using red mud to produce rock wool, it does not involve the slag ball waste generated in the process of using red mud to produce rock wool, and then recycles and extracts titanium, scandium and lanthanides Elemental Metal Oxide Technology and Process Methods

However, only for the extraction of elemental iron while using red mud to produce rock wool, this process of using red mud to produce rock wool does not increase any cost of using red mud to produce rock wool. The slag balls thrown into the pit and the slag ball waste picked out by the cotton collection device during the process of high-temperature melting and spinning into fibers by the centrifuge are naturally enriched with titanium, scandium and rare metal oxides in the red mud. Ball waste accounts for about 3% of the total amount of red mud and ingredients. A production line can produce thousands of tons of slag ball waste every year. Rare metal oxides in red mud are naturally enriched in slag ball waste during the production of rock wool. , the titanium, scandium and lanthanide oxides in these slag wastes are hundreds of times higher than those in red mud

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