Technology for preparing rareearth cerium silicon and rareearth lanthanum silicon alloy by rareearth enriching material and products thereof

Abstract

The technological process for preparing rare-earth-cerium silicon and rare-earth-lanthanum-silicon alloy by using rare earth enriched material is characterized by that the carbon-added quantity is 2.8-3.5 times carbon quantity required for converting all the rare earth oxides being in wet rare earth enriched material into carbide, the carbonaceous adhesive can be uniformly mixed, extruded and formed, and self-baked and coked in the uniformly mixed, extruded and formed, and self-baked and coked in the ore-smelting furnace to obtain coked briquette, then the silica, gas coal coke and blue carbon are added. The ratio of rate earth metal in the briquette and silicon total quantity in the silica is 1:0.50-1.0; the coke is used as reducing agent, the above-mentioned three materials are uniformly added into ore-smelting furnace for smelting, its potential gradient is 0.90-1.20 V / cm.

Description

technical field [0001] The invention belongs to the field of rare-earth alloy preparation, and in particular relates to a process for preparing high-rare-earth silicon alloy by using a wet-process rare-earth enrichment as a raw material and an ore-thermal method and a product thereof. Background technique [0002] At present, there are four main production methods of rare earth alloys, namely: electrothermal silicon method, carbon reduction method, molten salt electrolysis method or blending method. [0003] The above methods have their own advantages and disadvantages, but there are generally problems such as high energy consumption, low recovery rate of rare earths, short furnace life or long production cycle, which restrict the development of the rare earth alloy industry. [0004] The patent application proposed by the inventor, that is, the application number is: 01107843.X, the application date is February 28, 2001, and the patent application titled "process and produc...

AI Technical Summary

Problems solved by technology

[0005] 1. Rare earth coking agglomerates need to be treated outside the furnace, the process is cumbersome and the cycle is long;

[0006] 2. Wet process rare earth enrichment cannot be used, and most of the raw materials are concentrated ore such as magnetic separation, flotation ore, gravity separation, etc., so the cost of high rare earth silicon alloy is relatively high;

[0007] 3. The potential gradient is set corresponding to the condition of rare earth concentrate, and cannot adapt to the enrichment of hydrometallurgy. If this is copied, it will easily cause the crucible to move up in the high temperature area and the bottom of the furnace to rise