Uses of ammonium molybdate
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I heard that ammonium molybdate is an important reagent for measuring phosphorus. It is also used in fertilizers (trace element fertilizers), pigments, lake pigments, and fabric fire retardants, as well as in powder metallurgy, photography, ceramics, glazes, dyes, and other applications. What other uses are there? Is molybdenum metal also produced by decomposing ammonium molybdate into molybdenum oxide and then reducing it? Then why not use molybdenum oxide concentrate (MoO3) for direct reduction? Is it a purity requirement?
Experts are needed to answer this question~~~
You can take a look at \"Molybdenum Metallurgy\" and \"Tungsten and Molybdenum Metallurgy\"
1. Molybdenum roasted ore (MoO3), also known as industrial molybdenum trioxide, is the product obtained through the calcination and decomposition of ammonium molybdate; it is also referred to as high-purity molybdenum trioxide. It can be seen which one has a higher or lower purity. 2. Molybdenum powder is obtained by hydrogen reduction of molybdenum trioxide, and the **standard for Molybdenum Powder** sets strict requirements regarding impurity content. Direct hydrogen reduction of molybdenum concentrate cannot meet the **standard requirements. 3. From a usage perspective, for example, additives used in the special steel industry (molybdenum charge), strict requirements are placed on sulfur content. Molybdenum roasted ore (MoO3) is obtained by roasting molybdenum disulfide, and the reaction cannot be complete; as a result, unreacted molybdenum disulfide must be present, leading to an extremely high sulfur content.
Ammonium dimolybdate: used in the production of molybdenum powder for metallurgy and as a fertilizer containing trace elements. Manufacturing ceramic pigments and other pigment compounds based on molybdenum. Ammonium tetramolybdate: It is used as a catalyst in the petrochemical industry, and in the metallurgical industry for producing molybdenum powder, molybdenum bars, molybdenum wires, molybdenum ingots, molybdenum sheets, etc. It can also be used as a trace element fertilizer, as well as a raw material for manufacturing ceramic pigments, dyes, and other molybdenum compounds. Ammonium heptamolybdate: an important reagent for determining phosphorus, and the best material for producing acrylonitrile catalysts.
The main uses of molybdenum metal are in industries such as steel, cemented carbides, catalysts, and fine chemicals. 80% of this molybdenum is used in the production of ferromolybdenum, which is then used to manufacture stainless steel, special steels, etc. The process involves baking molybdenum concentrate to produce roasted ore, which is subsequently fed directly into a smelting furnace for reduction to yield ferromolybdenum; this represents the main application area for molybdenum. The remaining molybdenum is mainly used to manufacture high-value refined products, although the total quantity is small. Strict requirements are placed on impurities, and further processing through the production of ammonium molybdate is necessary to obtain products such as molybdenum materials, molybdenum powder, molybdenum catalysts, and fertilizers.