Preparation method of molybdenum-iron alloy powder
A technology of molybdenum-iron alloy and powder, which is applied in the field of preparation of molybdenum-iron alloy powder, can solve the problems of large particle size, high reaction temperature, uneven product, etc., and achieve the effect of large synthesis amount, low reaction temperature and easy operation
Inactive Publication Date: 2015-09-09
SHANGHAI INST OF TECH
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[0004] The purpose of the present invention is to provide a method for preparing molybdenum-iron alloy powder in order to solve the above-mentioned technical problems such as high reaction temperature, uneven product and large particle size in the process of preparing molybdenum-iron alloy. The preparation method has mild reaction conditions, reaction The temperature is low, and the prepared ferromolybdenum alloy powder is pure and free of impurities
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Embodiment 1
[0033] A preparation method of ferromolybdenum alloy powder, specifically comprising the steps of:
[0034] (1) Use iron sheet as anode, inert electrode as cathode, 95ml aqueous solution containing depolarizer and sodium molybdate as anolyte, 90ml acid solution as catholyte, double-chamber electrolysis with cationic membrane as diaphragm In the tank, the constant current electrolysis method is adopted, and the temperature range is controlled from room temperature to 50°C to electrolyze the aqueous solution containing depolarizer and sodium molybdate for 30 minutes, that is, Na + The ions are all transferred to the cathode chamber;
[0035] In the described aqueous solution containing depolarizing agent and sodium molybdate, the concentration of sodium molybdate is 0.1mol / L, and the concentration of depolarizing agent is 0.01mol / L, and described depolarizing agent is sodium chloride;
[0036] The inert electrode is a titanium mesh;
[0037] Described acid solution is the aque...
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The invention relates to a preparation method of molybdenum-iron alloy powder, which takes an iron sheet as an anode, takes an inert electrode as a cathode, takes a depolarization agent and sodium molybdate-containing aqueous solution as anode liquid, and takes an acid solution, an aqueous alkali or salting liquid as cathode liquid; in a double-chamber electrolytic tank which takes a cation membrane as diaphragm, a constant current electrolytic mode or a constant voltage electrolytic mode is employed for controlling the temperature as room temperature to 90 DEG C for electrolyzing the depolarization agent and sodium molybdate-containing aqueous solution until Na<+> ions are completely transferred to the cathode chamber; after electrolyzing, the products obtained in the anode chamber are cleaned while filtering by deionized water, the obtained filter cakes are dried, temperature is heated to 600-800 DEG C under hydrogen atmosphere at 2.5-10 DEG C / min for high temperature reduction for 1-2 hours, and then the filter cakes are naturally cooled to room temperature to obtain the molybdenum-iron alloy powder. The preparation method has the advantages of mild reaction condition and low reaction temperature, and the iron alloy powder has the advantages of pureness powder, no miscellaneous phase, and uniform particle distribution.
Description
technical field [0001] The invention relates to a method for preparing ferromolybdenum alloy powder, belonging to the field of metal materials. technical background [0002] Ferromolybdenum refers to an alloy of 50% to 75% by weight of molybdenum and the rest is iron. It is mainly used to add molybdenum in the steelmaking process. More than 60% of molybdenum metal in the world is used in the production of alloy steel. Typically, ferromolybdenum is produced by the metallothermal reduction (thermite) method, which mixes molybdenum and iron oxides with a strong reducing agent (aluminum) and then reacts them. The metallothermal reduction method immediately generates a large amount of heat while oxidizing aluminum by depriving oxygen from molybdenum oxide or iron oxide, causing the reaction temperature to reach a high temperature of over 3000°C. And the generated ferromolybdenum ingots are crushed to the particle size range required by customers, but in the crushing process, abo...
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Inventor 张全生闵凡奇张建辉李细方李硕王淼党国举王昭勍李海燕
Owner SHANGHAI INST OF TECH