CN212174653U - Complex molybdenum ore oxygen pressure leaching wastewater purification production line meeting production water circulation - Google Patents
Complex molybdenum ore oxygen pressure leaching wastewater purification production line meeting production water circulation Download PDFInfo
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- CN212174653U CN212174653U CN202020556065.5U CN202020556065U CN212174653U CN 212174653 U CN212174653 U CN 212174653U CN 202020556065 U CN202020556065 U CN 202020556065U CN 212174653 U CN212174653 U CN 212174653U
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Abstract
The utility model provides a satisfy production hydrologic cycle's complicated molybdenum ore oxygen pressure leaching waste water purification production line, belongs to the comprehensive recovery technical field of molybdenum, includes degree of depth deoiling unit, neutralization purification unit and liquid-solid separation unit in proper order, passes through the pipe connection between each unit. After organic matters in the complex molybdenum ore oxygen pressure leaching wastewater are removed by the deep oil removal unit, impurities in the solution are removed by the neutralization purification unit, then the purified solution is obtained by the liquid-solid separation unit and is returned as circulating water, the molybdenum leaching rate of the complex molybdenum ore in an oxygen pressure leaching system is over 90 percent, the complete cyclic utilization of the wastewater in the system is realized, the economic development and utilization of the complex molybdenum ore under the current industrial technical background are realized, and the method has important significance for promoting the green development of low-grade complex molybdenum ore in China.
Description
Technical Field
The utility model belongs to the technical field of molybdenum is synthesized and is retrieved, a complicated molybdenum ore oxygen pressure that satisfies production water circulation leaches waste water purification production line is related to.
Background
A large amount of low-grade molybdenum ores exist in Hebei, Hunan and Guizhou of China, the occurrence state is complex, and the common processing production lines comprise: the conventional acid leaching, the conventional alkaline leaching, the acid mixing and curing and the like, but the process cannot be industrially popularized and applied due to various reasons, so that the complex molybdenum ore in China still cannot be developed and applied in a large scale at present. In recent years, around the efficient development of complex molybdenum ores, a direct oxygen pressure leaching process of raw ores is proposed. However, because the raw ore cannot be effectively enriched and can only be directly leached metallurgically, in order to meet the requirements of stirring, conveying and washing, a certain liquid-solid ratio must be ensured, and further a large amount of low-concentration molybdenum-containing solution in the whole system flows. Further enriching and separating the low-concentration molybdenum-containing solution to obtain an ammonium molybdate product, but producing a large amount of low-concentration wastewater. In domestic molybdenum ore resource development enterprises and molybdenum secondary resource development enterprises, because the grade of the treated raw materials is high (Mo 10-60%), the amount of produced wastewater is very small according to the ton of molybdenum metal, and the wastewater is generally discharged after being treated by a conventional lime neutralization process to reach the standard. For the complex molybdenum ore direct leaching process flow, under the same ammonium molybdate production scale, the wastewater production amount is 10-40 times of that of the conventional molybdenum concentrate and secondary molybdenum resource recovery process. Most of molybdenum ore resource development enterprises and molybdenum secondary resource development enterprises are leached under alkaline conditions, and wastewater is obtained by acid ammonia precipitation; the complex molybdenum ore is mainly wastewater generated by leaching under an acidic condition; the prior molybdenum smelting process wastewater treatment scheme has limited reference value. If all the molybdenum ores reach the standard according to the conventional wastewater treatment process and are discharged, the unit wastewater treatment cost is too high, and the development and utilization of the complex molybdenum ores have no economic benefit; research on direct recycling of wastewater shows that the oil contained in the wastewater has great influence on equipment operation and control in the pressure leaching process; the Mo leaching rate is greatly reduced by 15 to 20 percent; the filtering effect of the ore pulp is deteriorated; the problems of economic treatment and utilization of the wastewater cannot be effectively solved, and the industrial development and popularization practice of the complex molybdenum ore are still difficult to continue.
How to economically and efficiently realize the recycling of the wastewater and construct a complex molybdenum ore wastewater resource utilization process scheme becomes a core problem for promoting the development and utilization of the complex molybdenum ore industry. The utility model discloses combine complicated molybdenum ore oxygen pressure to leach process characteristics, propose a waste water purification production line who satisfies production water circulation, through the directional separation to characteristic factor in the waste water and handle, can effectively solve the waste water retrieval and utilization in-process to technological index, operation process's influence, reach the effect of optimal economic utilization, help advancing the development and utilization process of the complicated molybdenum ore of china low-grade.
SUMMERY OF THE UTILITY MODEL
The complex molybdenum ore oxygen pressure leaching wastewater is mainly characterized in that a large amount of raffinate water is generated after the complex molybdenum ore is subjected to oxygen pressure leaching-N235 extraction for molybdenum extraction, and researches show that the factors which have the greatest influence on return production in the wastewater mainly comprise organic matters, heavy metal ions, silicon ions, fluorine ions and the like which are carried in a solution. The utility model discloses to current complicated molybdenum ore not through ore dressing enrichment, direct metallurgy and the waste water production volume that leads to big, be difficult to the economic high efficiency and deal with the scheduling problem, combine waste water process characteristic, through the directional separation to characteristic factor in the waste water and handle, provide a waste water purification production line who satisfies production water circulation, realize that the molybdenum rate of recovery is more than 90% in the complicated molybdenum ore, waste water is whole cyclic utilization in the system. And further, the economic development and utilization of the complex molybdenum ore under the current industrial technical background are realized, and the method has important significance for promoting the green development of the low-grade complex molybdenum ore in China.
The purpose of the utility model is realized through the following technical scheme.
The utility model provides a satisfy production hydrologic cycle's complicated molybdenum ore oxygen pressure leaching waste water purification production line which characterized in that includes degree of depth deoiling unit, neutralization purification unit and liquid-solid separation unit in proper order, passes through the pipe connection between each unit. After organic matters in the complex molybdenum ore wastewater are removed by the deep oil removal unit, impurities (including metal ions and non-metal ions) in the solution are removed by the neutralization purification unit, and then the solution is purified by the liquid-solid separation unit and returned to the production system to be used as leaching water.
Further, degree of depth deoiling unit is including deoiling device, middle solution storage tank and corresponding pipeline, the deoiling device is for separating in oil clarifier tank, air supporting machine, ultrasonic emulsion breaker, ceramic filter, fibre adsorption column, resin adsorption column, the combination of multiple equipment in the active carbon adsorption column, ensures that organic matter content is below 10ppm in the solution after degree of depth deoiling. The interference of the volatilization of the organic matters in the oxygen pressure leaching process to the process control parameters is avoided, and the influence of the organic matters on the ore pulp filtering performance caused by the formation of three-phase matters in the ore pulp and the adhesion of the three-phase matters to the surface of the filter cloth is avoided.
Furthermore, the neutralization purification unit comprises a mechanical stirring tank and a corresponding pipeline, wherein the mechanical stirring tank is connected in series in multiple stages, the number of stages in series connection is not less than 3, and continuous neutralization is realized. The neutralizer adopts Ca (OH)2Or other alkaline substances, and the pH value of the neutralized solution is 7.5-8.5. Mainly used for removing heavy metal ions in wastewaterAnd silicon and fluorine plasma, so that the accumulation in the solution in the recycling process is avoided.
Further, the liquid-solid separation unit comprises a filtering device and a corresponding pipeline, wherein the filtering device is one of a plate and frame filter press, a belt type vacuum filter and a rotary drum vacuum filter.
The utility model provides a pair of satisfy production water circulation's complicated molybdenum ore oxygen pressure and leach waste water purification production line, its advantage lies in: aiming at the requirements of the oxygen pressure leaching process of the complex molybdenum ore, a complex molybdenum ore wastewater purification production line meeting the production water circulation is provided through the directional separation treatment of characteristic factors in wastewater, the complete cyclic utilization of the wastewater in a system is realized on the premise of ensuring the molybdenum recovery rate in the complex molybdenum ore to be more than 90%, further the economic development and utilization of the complex molybdenum ore under the current industrial technical background are realized, and the method has important significance for promoting the green development of low-grade complex molybdenum ore in China.
Drawings
FIG. 1 is a schematic diagram of a complex molybdenum ore oxygen pressure leaching wastewater purification production line meeting production water circulation.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The utility model provides a satisfy production hydrologic cycle's complicated molybdenum ore oxygen pressure leaching waste water purification production line, includes degree of depth deoiling unit, neutralization purification unit and liquid-solid separation unit in proper order, passes through the pipe connection between each unit. The deep oil removal unit comprises an oil separation clarifying tank, a ceramic filter, a 3-level activated carbon adsorption column, an intermediate solution storage tank and a corresponding pipeline. The neutralization purification unit comprises 4 stages of continuous neutralization stirring tanks and corresponding pipelines. The liquid-solid separation unit comprises a filter press and a corresponding pipeline.
The complex molybdenum ore is used for producing ammonium molybdate by adopting an oxygen pressure leaching-N235 extraction-ammonia water back extraction-sulfuric acid precipitation method, and a large amount of raffinate water is mainly generated after the N235 extraction. The factors which have the greatest influence on the return production in the wastewater mainly comprise organic matters, heavy metal ions, silicon ions, fluorine ions and the like carried in the solution.
The waste water (raffinate water) from the production system contains 250ppm of organic matters, and the organic matters are reduced to 10ppm after passing through an oil separation clarifying tank, a ceramic filter and a 3-grade activated carbon adsorption column; then sending the solution to a 4-stage continuous neutralization stirring tank, neutralizing the solution to pH 7.5-8.5 by using lime, and removing heavy metal ions, silicon ions and fluorine ions in the solution; and performing liquid-solid separation on the neutralized ore pulp by using a filter press to obtain neutralized purification slag, conveying the neutralized purification slag to a slag yard for stockpiling, and returning the neutralized purification slag to a production system to serve as complex molybdenum ore leaching liquid, wherein the molybdenum leaching rate is over 90 percent.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. The protection scope of the present invention is subject to the claims.
Claims (5)
1. The utility model provides a satisfy production hydrologic cycle's complicated molybdenum ore oxygen pressure leaching waste water purification production line which characterized in that includes degree of depth deoiling unit, neutralization purification unit and liquid-solid separation unit in proper order, passes through the pipe connection between each unit.
2. The production line of claim 1, wherein the deep oil removal unit comprises an oil removal device, an intermediate solution storage tank and corresponding pipelines, and the oil removal device is one or a combination of multiple devices selected from an oil separation clarifying tank, an air flotation machine, an ultrasonic emulsion breaking machine, a ceramic filter, a fiber adsorption column, a resin adsorption column and an activated carbon adsorption column.
3. The production line of claim 1, wherein the neutralization and purification unit comprises a mechanical agitation tank and corresponding pipelines, and the mechanical agitation tank is connected in series in multiple stages.
4. The production line of claim 3, wherein the mechanical agitation tanks are connected in series in no less than 3 stages.
5. The production line of claim 1, wherein the liquid-solid separation unit comprises a filtering device and a corresponding pipeline, and the filtering device is one of a plate and frame filter press, a belt vacuum filter and a rotary drum vacuum filter.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116199401A (en) * | 2023-05-06 | 2023-06-02 | 中核沽源铀业有限责任公司 | Method and device for advanced treatment of molybdenum ore oxygen pressure industrial circulating water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116199401A (en) * | 2023-05-06 | 2023-06-02 | 中核沽源铀业有限责任公司 | Method and device for advanced treatment of molybdenum ore oxygen pressure industrial circulating water |
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