A Ferromolybdenum Smelting Method Based on Available Oxygen Content in Roasted Molybdenum Concentrate

Abstract

The invention discloses a ferro-molybdenum smelting method based on effective oxygen content in roasted molybdenum concentrate. Content of 4-valence and 6-valence salts as well as molybdate and molybdenum sulfide in a phase composition of the roasted molybdenum concentrate is analyzed and determined, corresponding oxygen coefficients are calculated respectively, and practical dose, required by production of smelting ferro-molybdenum, of a reducing agent is determined; and according to the calculated dose of the reducing agent, a final product ferro-molybdenum is produced by virtue of processes of purporting, mixing, charging and smelting, killing, slagging, lifting and water-quenching, crushing and finishing, testing and packaging. The method disclosed by the invention can be utilized to scientifically and efficiently treat the roasted molybdenum concentrate with different roasting processes, different grades and different effective oxygen content to carry out ferro-molybdenum smelting, is wide in adaptive range, low in technical experience requirement, suitable for open type development of a ferro-molybdenum smelting technology; and especially, the quality of the produced ferro-molybdenum is guaranteed to be stable, the smelting energy consumption and the production cost are reduced, so that the ferro-molybdenum smelting process is environmentally-friendly, safe and efficient.

Description

technical field [0001] The invention relates to a ferromolybdenum smelting method, in particular to a ferromolybdenum smelting method based on the effective oxygen content in roasted molybdenum concentrate. Background technique [0002] It is known that the metallothermal reduction method uses elements with high affinity to oxygen (silicon, aluminum) to reduce metal oxides (molybdenum oxide) with low affinity to oxygen. The process of smelting ferromolybdenum by this method is common in the production of ferromolybdenum. Process, the process is divided into raw material preparation, ratio calculation, mixing, furnace smelting, sedation, slag discharge, lifting water quenching, crushing and finishing, testing and packaging and other processes. The chemical reaction in the smelting process releases a large amount of heat energy, which is enough to heat the alloy and slag to the necessary temperature without supplying heat from the outside, and the reaction proceeds smoothly by...

AI Technical Summary

Problems solved by technology

[0004] In the actual operation of its "oxygen" balance calculation stage, it often relies on the personal experience correction results of technicians to organize the actual production. In addition to using personal experience as a commercial secret, due to the interference of various unpredictable factors, the reducing agent control Instability, which in turn leads to the frequent occurrence of unstable economic and technical indicators of ferromolybdenum production, resulting in a decline in the quality of ferromolybdenum and an increase in production costs. It is not advisable to use the formula data obtained by this method for actual smelting

, is also not conducive to the open development of ferromolybdenum metallurgy technology