CN102061388A - Method for smelting ferromolybdenum by utilizing molybdenum scrap - Google Patents
Method for smelting ferromolybdenum by utilizing molybdenum scrap Download PDFInfo
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- CN102061388A CN102061388A CN2010105031633A CN201010503163A CN102061388A CN 102061388 A CN102061388 A CN 102061388A CN 2010105031633 A CN2010105031633 A CN 2010105031633A CN 201010503163 A CN201010503163 A CN 201010503163A CN 102061388 A CN102061388 A CN 102061388A
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- molybdenum
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Abstract
The invention discloses a production method of ferromolybdenum, relating to a method for producing ferromolybdenum by utilizing thermometallurgy, in particular to a method for producing ferromolybdenum by utilizing molybdenum scraps. The method is characterized in that the production process comprises the following steps: (1) drying or roasting scraps containing molybdenum for decontaminating; (2) adjusting molybdenum grade by utilizing molybdenum oxide; and (3) reducing and smelting the ferromolybdenum by an alumino-silico-thermic process. The method provided by the invention has not only a good recovery effect on the molybdenum scrap with higher grade but also a good recovery effect on the molybdenum scrap with lower grade, is suitable for scraps of which the molybdenum content is 6-60%, and is simple in recovery process, short in flow and high in recovery rate. The detection indexes Mo, S, P, C, Cu, S and the like of the prepared ferromolybdenum all reach the standards, and all sampling results reach the national ferromolybdenum standard. The total cost of the prepared ferromolybdenum is obviously lowered, and the economic benefit is obvious. The method can be used for fully utilizing the secondary resource of molybdenum and has favourable environmental benefits, thus the problem of waste pollution in the molybdenum production process is solved, and the clean production from molybdenum smelting to molybdenum chemical industry is realized.
Description
Technical field
A kind of molybdenum waste material refining molybdenum-iron method relates to the method that molybdenum-iron is produced in a kind of pyrometallurgy, particularly utilizes the molybdenum waste material to produce the method for molybdenum-iron.
Background technology
At present, the molybdenum Application Areas is widened day by day, and the molybdenum demand strengthens day by day, and therefore human exploitation molybdenum resource paces are more and more fast, and non-renewable molybdenum resource faces exhausted danger, so utilization has the important strategic meaning to the molybdenum resource circulation.
Generation contains the molybdenum waste material in a large number in the production of molybdenum chemical metallurgy, and the molybdenum waste material comprises molybdenum ammonia slag, waste water slag, flue dust and slag iron etc.Molybdenum ammonia slag is to produce in the process of producing ammonium molybdate, ammonium molybdate uses molybdenum oxide → nitric acid always and embathes → and ammoniacal liquor leaches → purifies → add Acid precipitation → evaporative crystallization technique manufacturing, the ammonia process of soaking can not all be converted into liquid phase with molybdenum oxide, part molybdenum is stayed and is wherein formed molybdenum ammonia slag, contains molybdenum about 6%～30%.The waste water slag also produces in this process, and the waste water after acid is heavy forms the wastewater sedimentation slag through placement or after adding precipitation agent.Flue dust is to produce in the process of calcining molybdenum concentrate and smelting molybdenum-iron, and when calcining molybdenum ore concentrate and molybdenum-iron were smelted, molybdenum oxide was sublimed into flue gas and flies upward, and collected through electric dust collector and formed flue dust, contained molybdenum about 30%～60%.Slag iron is meant in granularity less (below the 5mm), surface irregularity, spot more, is not suitable for making steel the molybdenum-iron of usefulness.These molybdenum waste materials all contain valuable metal, and content is higher, refine difficulty but reclaim, and cause the wasting of resources, environmental pollution to a certain extent.
Forefathers attempt with methods such as hydrochloric acid decomposition, soda oxidizing roastings, as molybdenum ammonia slag, soak-purify-concentration and crystallization process production Sodium orthomolybdate or ammonium molybdate with hydrochloric acid decomposition/sodium carbonate roasting-alkali, make ammonia leaching residue contain molybdenum and drop to 1%, the rate of recovery 80～90% of molybdenum.But these methods all exist operation many, and labour intensity is big, and raw and auxiliary material consumption is many, product cost height, problems such as the rate of recovery is not high, deficiency in economic performance.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, provides a kind of and can make full use of the molybdenum resource, improves the rate of recovery, reduces the production method of recycling cost, the simple molybdenum-iron of technical process.
The objective of the invention is to be achieved through the following technical solutions.
A kind of production method of molybdenum-iron is characterized in that the step of its production process comprises:
(1) will contain that the molybdenum waste material is dried or the roasting removal of impurities;
(2) adjust the molybdenum grade with molybdenum oxide;
(3) with silicothermic process reducing and smelting molybdenum-iron.
The production method of a kind of molybdenum-iron of the present invention, it is characterized in that containing the molybdenum waste material, to carry out drying course be to containing moisture≤1% 100～200 ℃ of oven dry.
The production method of a kind of molybdenum-iron of the present invention is characterized in that adjusting the molybdenum grade to Mo content 〉=50% with molybdenum oxide.
The production method of a kind of molybdenum-iron of the present invention, the step that it is characterized in that its production process also comprises carries out the roasting removal of impurities with containing the molybdenum waste material under 400～600 ℃ of temperature, make foreign matter content S≤0.07% in the molybdenum waste material after the roasting, P≤0.02%.
The method that the present invention proposes not only has good recovering effect to the higher molybdenum waste material of grade, and the molybdenum waste material lower to grade also has good recovering effect, is applicable to the waste material of 6%～60% molybdenum content, and it is simple to reclaim technology, and flow process is short, rate of recovery height.
With the method that the present invention proposes, it is all up to standard that the molybdenum-iron of preparation detects index Mo, S, P, C, Cu, S etc., and sampling results is all less than the molybdenum-iron national standard.The molybdenum-iron total cost of preparation has obvious reduction, and economic benefit is obvious, makes full use of the secondary resource of molybdenum, also has good benefits in environment simultaneously, has solved the waste pollution problem in the molybdenum production process, has realized smelting from molybdenum the cleaner production of molybdenum chemical industry.
Description of drawings
Fig. 1 is the process flow sheet of the inventive method.
Embodiment
A kind of production method of molybdenum-iron, adopting the molybdenum waste material that comprises molybdenum ammonia slag, waste water slag, flue dust and slag iron etc. that produces in ammonium molybdate and the molybdenum-iron production process is raw material, at first, finds out foreign matter contents such as molybdenum waste material moisture and S, P.If S, P foreign matter content are low, then the molybdenum waste material is got final product at 100～200 ℃ of oven dry moisture, make moisture≤1% after the oven dry, S≤0.07%, P≤0.02%; If S, P foreign matter content height, then with the molybdenum waste material 400～600 ℃ of roasting removal of impurities, make moisture≤1%, S≤0.07%, P≤0.02%.Contain the molybdenum amount according to the molybdenum waste material again, adjust molybdenum waste material grade Mo 〉=50% with molybdenum oxide.Molybdenum ammonia slag in the molybdenum waste material, waste water slag, flue dust, slag iron etc. contain the molybdenum product, can be wherein a kind of, also can be that several and industrial molybdenum oxide proportionally mixes, and mixed molybdenum grade reaches the requirement of industry smelting molybdenum-iron and gets final product, and makes mixture granularity≤4mm.At last, add auxiliary materials such as ferrosilicon, iron scale, steel cuttings, aluminum shot, nitre, fluorite, with silicothermic process reducing and smelting molybdenum-iron.
Embodiment 1
With molybdenum ammonia slag is raw material, Mo7.64%, and S0.1%, P0.07%, moisture 20% 400～600 ℃ of roasting oven dry removal of impurities, is dried back moisture≤1%, S≤0.07%, P≤0.02% with molybdenum ammonia slag.Adjust molybdenum waste material grade Mo50% with molybdenum oxide, mix the back 120 kg.Add auxiliary materials such as 38.76 kilograms of ferrosilicon, 27.12 kilograms of iron scales, 21.2 kilograms of steel cuttings, 6.3 kilograms of aluminum shots, 6.5 kilograms on nitre, 8.4 kilograms in fluorite then, with silicothermic process reducing and smelting molybdenum-iron, 93.7 kilograms of output molybdenum-irons, the molybdenum-iron of preparation detects index Mo60.20%, S0.085%, P0.039%, C0.062%, Cu0.15%, Si0.77%, and sampling results all reaches the molybdenum-iron national standard.
Embodiment 2
With the waste water slag is raw material, Mo31.57%, and S0.266%, P0.05%, moisture 16.35% 400～600 ℃ of roasting oven dry removal of impurities, is dried back moisture≤1%, S≤0.07%, P≤0.02% with the waste water slag.Adjust molybdenum waste material grade Mo55% with molybdenum oxide, mix the back 120 kg.Add auxiliary materials such as 38.76 kilograms of ferrosilicon, 27.12 kilograms of iron scales, 21.95 kilograms of steel cuttings, 6.3 kilograms of aluminum shots, 6.0 kilograms on nitre, 8.4 kilograms in fluorite then, with silicothermic process reducing and smelting molybdenum-iron, 104.5 kilograms of output molybdenum-irons, the molybdenum-iron of preparation detects index Mo61.47%, S0.10%, P0.04%, C0.058%, Cu0.20%, Si0.95%, and sampling results all reaches the molybdenum-iron national standard.
Embodiment 3
With molybdenum ammonia slag (Mo20.3%), flue dust (Mo55.0%) and slag iron (Mo59.0%) etc. is raw material, mixes back moisture 2.64%, S0.06%, P0.018%, with the molybdenum waste material at 100～200 ℃ of oven dry, moisture≤1%, adjust molybdenum waste material grade Mo50% with molybdenum oxide, mix back 340 kilograms.Add auxiliary materials such as 99 kilograms of ferrosilicon, 68.4 kilograms of iron scales, 61.5 kilograms of steel cuttings, 15 kilograms of aluminum shots, 17.1 kilograms on nitre, 12 kilograms in fluorite then, with silicothermic process reducing and smelting molybdenum-iron, 270 kilograms of output molybdenum-irons, the molybdenum-iron of preparation detects index Mo61.1%, S0.08%, P0.040%, C0.04%, Cu0.07%, Si0.47%, and sampling results all reaches the molybdenum-iron national standard.
Claims (4)
1. the production method of a molybdenum-iron is characterized in that the step of its production process comprises:
(1) will contain that the molybdenum waste material is dried or the roasting removal of impurities;
(2) adjust the molybdenum grade with molybdenum oxide;
(3) with silicothermic process reducing and smelting molybdenum-iron.
2. the production method of a kind of molybdenum-iron according to claim 1, it is characterized in that containing the molybdenum waste material, to carry out drying course be to containing moisture≤1% 100～200 ℃ of oven dry.
3. the production method of a kind of molybdenum-iron according to claim 1 is characterized in that adjusting the molybdenum grade to Mo content 〉=50% with molybdenum oxide.
4. the production method of a kind of molybdenum-iron according to claim 1, the step that it is characterized in that its production process also comprises carries out the roasting removal of impurities with containing the molybdenum waste material under 400～600 ℃ of temperature, make foreign matter content S≤0.07% in the molybdenum waste material after the roasting, P≤0.02%.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251121A (en) * | 2011-07-06 | 2011-11-23 | 金堆城钼业股份有限公司 | Method for preparing industrial molybdenum trioxide by roasting ammonia leaching residue |
| CN102534273A (en) * | 2012-01-01 | 2012-07-04 | 洛阳钼业集团金属材料有限公司 | Process for smelting ferromolybdenum through silico-aluminum thermic method |
| CN103695768A (en) * | 2013-12-25 | 2014-04-02 | 嵩县开拓者钼业有限公司 | Tungsten-molybdenum-iron alloy and preparation method for same |
| CN104053799A (en) * | 2011-11-25 | 2014-09-17 | 法罗雷格林加股份公司 | Iron and molybdenum containing pellets |
| CN104152707A (en) * | 2014-08-28 | 2014-11-19 | 金堆城钼业股份有限公司 | Method for smelting ferro-molybdenum from ammonia leaching residue to recover molybdenum |
| CN104762544A (en) * | 2015-04-24 | 2015-07-08 | 金堆城钼业股份有限公司 | Ferro-molybdenum and preparation method thereof |
| CN105441667A (en) * | 2014-08-30 | 2016-03-30 | 泰州市安达有色金属有限公司 | Process for producing ferromolybdenum from low grade molybdenum ores through improving melting point of slag |
| CN109055642A (en) * | 2018-08-27 | 2018-12-21 | 河北罗奇新材料科技有限公司 | Ferro-niobium, ferrotungsten, molybdenum-iron smelting process |
| CN113265535A (en) * | 2021-05-14 | 2021-08-17 | 西安建筑科技大学 | Method for utilizing crystalline silicon cutting waste |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787449A (en) * | 2010-01-25 | 2010-07-28 | 锦州新华龙钼业股份有限公司 | Method for producing ferromolybdenum through using mixture of molybdenum oxide lump waste materials and molybdenum oxide ammonia leaching residue |
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- 2010-10-12 CN CN2010105031633A patent/CN102061388A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101787449A (en) * | 2010-01-25 | 2010-07-28 | 锦州新华龙钼业股份有限公司 | Method for producing ferromolybdenum through using mixture of molybdenum oxide lump waste materials and molybdenum oxide ammonia leaching residue |
Non-Patent Citations (1)
| Title |
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| 《铁合金》 19911231 游子智等 钼精矿搭配钼酸铵浸出渣生产钼铁的工业试验 24-27 1-4 , 第1期 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251121A (en) * | 2011-07-06 | 2011-11-23 | 金堆城钼业股份有限公司 | Method for preparing industrial molybdenum trioxide by roasting ammonia leaching residue |
| CN104053799A (en) * | 2011-11-25 | 2014-09-17 | 法罗雷格林加股份公司 | Iron and molybdenum containing pellets |
| CN102534273A (en) * | 2012-01-01 | 2012-07-04 | 洛阳钼业集团金属材料有限公司 | Process for smelting ferromolybdenum through silico-aluminum thermic method |
| CN103695768A (en) * | 2013-12-25 | 2014-04-02 | 嵩县开拓者钼业有限公司 | Tungsten-molybdenum-iron alloy and preparation method for same |
| CN104152707A (en) * | 2014-08-28 | 2014-11-19 | 金堆城钼业股份有限公司 | Method for smelting ferro-molybdenum from ammonia leaching residue to recover molybdenum |
| CN104152707B (en) * | 2014-08-28 | 2016-03-16 | 金堆城钼业股份有限公司 | A kind of ammonia leaching residue Smelting Ferromolybdenum reclaims the method for molybdenum |
| CN105441667A (en) * | 2014-08-30 | 2016-03-30 | 泰州市安达有色金属有限公司 | Process for producing ferromolybdenum from low grade molybdenum ores through improving melting point of slag |
| CN104762544A (en) * | 2015-04-24 | 2015-07-08 | 金堆城钼业股份有限公司 | Ferro-molybdenum and preparation method thereof |
| CN104762544B (en) * | 2015-04-24 | 2016-08-24 | 金堆城钼业股份有限公司 | A kind of molybdenum-iron and preparation method thereof |
| CN109055642A (en) * | 2018-08-27 | 2018-12-21 | 河北罗奇新材料科技有限公司 | Ferro-niobium, ferrotungsten, molybdenum-iron smelting process |
| CN113265535A (en) * | 2021-05-14 | 2021-08-17 | 西安建筑科技大学 | Method for utilizing crystalline silicon cutting waste |
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Application publication date: 20110518 |