CN102851492A - Method for heating pressure leaching kettle system through using high-temperature heat conduction oil - Google Patents
Method for heating pressure leaching kettle system through using high-temperature heat conduction oil Download PDFInfo
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- CN102851492A CN102851492A CN2012103111420A CN201210311142A CN102851492A CN 102851492 A CN102851492 A CN 102851492A CN 2012103111420 A CN2012103111420 A CN 2012103111420A CN 201210311142 A CN201210311142 A CN 201210311142A CN 102851492 A CN102851492 A CN 102851492A
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Abstract
The invention discloses a method for heating a pressure leaching kettle system through using high-temperature heat conduction oil. The method is characterized in that the high-temperature heat conduction oil is used as a heat transfer medium of the pressure leaching kettle system. The method comprises the following steps: heating the high-temperature heat conduction oil by a heat conduction oil boiler through a fuel which is a combustible material, and forcing the cycle of the high-temperature heat conduction oil through utilizing an oil pump to supply heat for the pressure leaching kettle system in order to make the leached pulp temperature in the pressure leaching kettle of the pressure leaching kettle system reach 150-200DEG C. The heat exchanger outside the pressure leaching kettle adopts a titanium or stainless steel tabulation structure as a heat conductor, and the heat exchanger in the pressure leaching kettle adopts a titanium coiler structure as the heat conductor. The method has the characteristics of low pressure, high temperature, saving, high efficiency and saving, and has the advantages of reasonable structure, matching completeness, short installation period, convenient operation and maintenance, convenient arrangement of the boiler beside the kettle, omission of a water processing system and equipment, improvement of the system heat efficiency, and reduction of the maintenance workload of the equipment and pipelines, so the investment and operation cost of the heating system can be reduced.
Description
Technical field
The invention belongs to technical field of smelting, relate to a kind of method that heats up to pressure leaching still system heating with high temperature heat conductive oil.
Background technology
Pressurization Chemical Leaching technology is the advanced technologies that twentieth century grows up, its feature is that technical process is short, strong adaptability, hydrometallurgy valuable metal leaching yield is high, materials consumption is few, level of automation is high, production cost is low, do not produce waste gas, waste residue and waste liquid in the production process, therefore, can be considered to free of contamination cleaning procedure.When the pressurization Chemical Leaching, leaching ore pulp generally is high temperature, high pressure, peracidity or high alkalinity ore pulp or liquid.During high temperature: temperature is at 120-260 C °; During high pressure: gaseous tension is at 0.5-5 MPa, during peracidity: acid is from several grams to hundreds of grams per liters; During high alkalinity: alkali is from tens of grams to more than hundreds of grams per liters.
Obtain so high temperature, only have high-pressure water vapor to obtain in the at present general production technique; As: high-pressure steam pressure is in the time of 200 C °: 1.55 MPa; High-pressure steam pressure is in the time of 260 C °: 4.7 MPa.High-pressure steam pressure is in the time of 300 C °: 8.58MPa, and produce the again essential high-duty boiler that adopts of high pressure steam.Therefore investment is large, and maintenance cost is many, and cost is also high.Thermal oil, fused salt are high-temperature heat-transfer mediums, are more than 400 ℃ the time in service temperature, and fused salt has absolute advantage than thermal oil, but its inadaptable pressurization Chemical Leaching below 400 ℃.Thermal oil is not also reported and is seen for the pressurization Chemical Leaching.
Summary of the invention
The object of the invention is to adopt heat-conducting oil furnace to replace the steam high-duty boiler, use thermal oil as the industry oil heat-transfer medium, thereby a kind of method that heats up to pressure leaching still system heating with high temperature heat conductive oil is provided.
Technical scheme of the present invention is passed through following process implementation: adopt heat-conducting oil furnace to replace the steam high-duty boiler, thermal oil is as the industry oil heat-transfer medium, do heat conductor with the titanium coil pipe in still external application titanium tubulation structure (or stainless steel) the heat exchanger preheating slurries, kettle; By thermal oil and the heat exchanging process that leaches ore pulp, make the leaching slurry temperature reach 150-250 C ° again.
Use thermal oil as the heat-transfer medium of autoclave system, thermal oil through the heat conducting oil boiler heating after, to the heat supply of autoclave system, make and leach slurry temperature in the pressure leaching still of autoclave system and reach 150-250 C °.
Described thermal oil is by the pressure leaching still heat supply of heat exchanger to the autoclave system, and the kettle of pressure leaching still outward, kettle is interior or kettle is provided with heat exchanger outward.
The heat exchanger that the kettle of pressure leaching still is provided with outward adopts titanium or stainless tubulation structure to do the heat-transfer pipe conductor, and the heat exchanger that is provided with in the kettle of pressure leaching still adopts the titanium coil arrangement to do the heat-transfer pipe conductor.
Preferably: be provided with heat exchanger in the kettle of pressure leaching still is outer, take thermal oil as thermal barrier, in heat conducting oil boiler more than the heat-conducting oil heating to 320 ℃, utilize oil pump to force thermal oil in pipeline and heat exchanger, to circulate, a part of thermal oil is flowed to the heat exchanger that the kettle of pressure leaching still is provided with outward by pipeline; By the acid solution in the heat exchange heating input pressure leaching still; Another part thermal oil flows to the heat exchanger that is provided with in the kettle of pressure leaching still by pipeline, replenish and keep the Chemical Leaching temperature of reaction in the pressure leaching still, by heat exchanger control heat conduction oil mass, keep leaching slurry temperature and reach 150-250 C °, thermal oil is forced to return heat conducting oil boiler again and reheat recirculation more than 320 ℃ under the liquid phase circulation at oil pump.
Thermal oil is in the circulation of returning heat conducting oil boiler, give ore pulp thermal exchange by heat exchanger, ore pulp passes through the ladder dividing plate to last lattice chamber from the first lattice chamber, leach ore pulp under the effect of still internal pressure, automatically entering flash drum reduces pressure, the output low-pressure steam is waste heat, and low-pressure steam recycles in preheating is immersed and goes out ore pulp.
Beneficial effect of the present invention:
1, has low pressure, high temperature, safe, energy-efficient characteristics.
2, have complete operation control and safety monitoring assembly, can critically control working temperature.
3, rational in infrastructure, comprehensive, installation period is short, operation and easy to maintenance is convenient to by layout of boiler and the kettle.
4, omit water treatment system and equipment, improved system thermal efficiency, reduced the maintenance workload of equipment and pipeline.Namely can reduce investment and the process cost of heating system.
Description of drawings
Fig. 1 is the system architecture schematic diagram of the embodiment of the invention 1.
Fig. 2 is system's heat exchange schematic diagram of the embodiment of the invention 1.
Titanium tubular heat exchange 1 among the figure; Agitator 2, pressure leaching still 3, heat conducting oil boiler 4, valve 5, oil pump 6, oil strainer 7, top petrol tank 8, titanium coil pipe 9, stirring rake 10.
Embodiment
The present invention is by the following examples can the invention will be further described, yet scope of the present invention is not limited to following embodiment.
Embodiment 1:
Be provided with heat exchanger in the kettle of pressure leaching still 3 is outer, take thermal oil as thermal barrier, at first, be fuel with combustible matl, in heat conducting oil boiler more than the heat-conducting oil heating to 320 ℃, utilize oil pump 6 to force thermal oils in pipeline and heat exchanger, to circulate, a part of thermal oil is flowed to the titanium tubular heat exchange 1 that the kettle of pressure leaching still 3 is provided with outward by pipeline; By the acid solution in the heat exchange heating input pressure leaching still 3; Another part thermal oil flows to the heat exchanger that is provided with in the kettle of pressure leaching still 3-titanium coil pipe 9 by pipeline, replenish and keep the Chemical Leaching temperature of reaction in the pressure leaching still 3, by titanium heat-exchanger control heat conduction oil mass, keep leaching slurry temperature and reach 150-250 C °, thermal oil is forced to return heat conducting oil boiler 4 again and reheat recirculation more than 320 ℃ under the liquid phase circulation at oil pump 6.System also is provided with simultaneously: agitator 2, valve 5, oil strainer 7, top petrol tank 8, stirring rake 10.
Thermal oil is in the circulation of returning heat conducting oil boiler, give ore pulp thermal exchange by titanium heat-exchanger, ore pulp passes through the ladder dividing plate to last lattice chamber from the first lattice chamber, leach ore pulp under the effect of still internal pressure, automatically entering flash drum reduces pressure, output low-pressure steam (waste heat), the preheating of low-pressure steam recycling is immersed to go out ore pulp.
Because titanium is good impregnating material; It is again good heat-conducting metal; Withstand voltage again.Therefore, do heat conductor with the titanium coil pipe in the present embodiment still external application titanium tubulation structure (or stainless steel) heat exchanger preheating slurries, kettle; Heat exchanger tube in heat exchanger and the still adopts coil tube type and tubulation structure.
Under the condition of the present embodiment near normal pressure, can obtain very high service temperature.The pump circulation better effects if namely can reduce working pressure and the safety requirements of heat system greatly, has improved the reliability of system and equipment; The process requirements of differing temps heating, cooling be can in wider temperature range, satisfy again, or in same system, heat and subcooled processing requirement realized simultaneously with the same thermal oil.Namely can reduce the complicacy of system and operation; Omit water treatment system and equipment, improved system thermal efficiency, reduced the maintenance workload of equipment and pipeline.Can reduce again initial cost and the process cost of heating system; Because heat-conducting oil system is worked under the low pressure condition, therefore its processing safety will be higher than the water and steam system.With steam high-duty boiler ratio, thermo-efficiency can improve 30-40%.
The present embodiment has been found out effective operation scheme, to improve thermo-efficiency, reaches the purpose of energy efficiency.The closed circulation heat supply, top petrol tank communicates with atmosphere, and liquid phase is carried heat energy, and thermosteresis is little, and energy-saving effect is remarkable, and environment protecting is good.Owing to adopting coil tube type and tubulation structure, therefore, heating surface is sufficient, makes it have higher thermo-efficiency in the stove, in heat exchanger and the still.
Claims (5)
1. method that heats up to pressure leaching still system heating with high temperature heat conductive oil, it is characterized in that: use thermal oil as the heat-transfer medium of autoclave system, after thermal oil heats through heat conducting oil boiler, thermal oil is by the pressure leaching still heat supply of heat exchanger to the autoclave system, makes to leach slurry temperature in the pressure leaching still of autoclave system and reach 150-250 C °.
According to claim 1 a kind of with high temperature heat conductive oil to the method that pressure leaching still system heating heats up, it is characterized in that the kettle of described pressure leaching still is outer, in the kettle or kettle be provided with heat exchanger in outer.
3. according to claim 2 a kind of with the method for high temperature heat conductive oil to the intensification of pressure leaching still system heating, it is characterized in that the heat exchanger that the kettle of pressure leaching still is provided with adopts titanium or stainless tubulation structure to do the heat-transfer pipe conductor outward, the heat exchanger that is provided with in the kettle of pressure leaching still adopts the titanium coil arrangement to do the heat-transfer pipe conductor.
4. according to claim 1 and 2 a kind of with the method for high temperature heat conductive oil to the intensification of pressure leaching still system heating, its feature: be provided with heat exchanger in the kettle of pressure leaching still is outer, take thermal oil as thermal barrier, in heat conducting oil boiler more than the heat-conducting oil heating to 320 ℃, utilize oil pump to force thermal oil in pipeline and heat exchanger, to circulate, a part of thermal oil is flowed to the heat exchanger that the kettle of pressure leaching still is provided with outward by pipeline; By the acid solution in the heat exchange heating input pressure leaching still; Another part thermal oil flows to the heat exchanger that is provided with in the kettle of pressure leaching still by pipeline, replenish and keep the Chemical Leaching temperature of reaction in the pressure leaching still, by heat exchanger control heat conduction oil mass, keep leaching slurry temperature and reach 150-250 C °, thermal oil is forced to return heat conducting oil boiler again and reheat recirculation more than 320 ℃ under the liquid phase circulation at oil pump.
5. according to claim 4 a kind of with the method for high temperature heat conductive oil to the intensification of pressure leaching still system heating, its feature: thermal oil is in the circulation of returning heat conducting oil boiler, give ore pulp thermal exchange by heat exchanger, ore pulp passes through the ladder dividing plate to last lattice chamber from the first lattice chamber, leach ore pulp under the effect of still internal pressure, automatically enter flash drum and reduce pressure, the output low-pressure steam is waste heat, and low-pressure steam recycles in preheating is immersed and goes out ore pulp.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087919A (en) * | 2015-10-07 | 2015-11-25 | 吉首大学 | Cyclone separation ammonia-leakage-free type copper mine efficient chemical combination leaching device |
| CN105087920A (en) * | 2015-10-07 | 2015-11-25 | 吉首大学 | Environment-friendly efficient copper mine combination leaching device with reverse-cone sieve disc |
| CN105087921A (en) * | 2015-10-07 | 2015-11-25 | 吉首大学 | Effective counter-cone sieve plate ammonia full-recycling type copper mine combined leaching device |
| CN105087923A (en) * | 2015-10-07 | 2015-11-25 | 吉首大学 | Cyclone separation environment-friendly copper mine efficient chemical combination leaching device |
| CN105627793A (en) * | 2015-02-03 | 2016-06-01 | 中国恩菲工程技术有限公司 | Novel wet leaching material heat exchange system and heat exchange method of novel wet leaching material heat exchange system |
| CN105874088A (en) * | 2013-12-20 | 2016-08-17 | 奥图泰(芬兰)公司 | Method and system |
| CN111139355A (en) * | 2018-11-06 | 2020-05-12 | 金川集团股份有限公司 | Production line with anti-scaling function for extracting nickel and cobalt from laterite-nickel ore |
| CN112828412A (en) * | 2020-12-28 | 2021-05-25 | 吴俊楠 | Soldering tin stove waste heat treatment equipment based on convection heat transfer |
| CN116356157A (en) * | 2023-04-03 | 2023-06-30 | 西安陕鼓动力股份有限公司 | Device and method for treating ore pulp before and after laterite-nickel ore wet acid leaching reaction |
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| CN101899567A (en) * | 2009-12-09 | 2010-12-01 | 中国恩菲工程技术有限公司 | Ore pressure leaching process |
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| CN101899567A (en) * | 2009-12-09 | 2010-12-01 | 中国恩菲工程技术有限公司 | Ore pressure leaching process |
Non-Patent Citations (1)
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874088A (en) * | 2013-12-20 | 2016-08-17 | 奥图泰(芬兰)公司 | Method and system |
| CN105627793A (en) * | 2015-02-03 | 2016-06-01 | 中国恩菲工程技术有限公司 | Novel wet leaching material heat exchange system and heat exchange method of novel wet leaching material heat exchange system |
| CN105698573B (en) * | 2015-02-03 | 2018-09-11 | 中国恩菲工程技术有限公司 | Wet-leaching material-heat-exchanging system and its heat-exchange method |
| CN105698573A (en) * | 2015-02-03 | 2016-06-22 | 中国恩菲工程技术有限公司 | Novel wet lixiviated material heat exchanging system and heat exchanging method thereof |
| CN105087923A (en) * | 2015-10-07 | 2015-11-25 | 吉首大学 | Cyclone separation environment-friendly copper mine efficient chemical combination leaching device |
| CN105087919A (en) * | 2015-10-07 | 2015-11-25 | 吉首大学 | Cyclone separation ammonia-leakage-free type copper mine efficient chemical combination leaching device |
| CN105087921A (en) * | 2015-10-07 | 2015-11-25 | 吉首大学 | Effective counter-cone sieve plate ammonia full-recycling type copper mine combined leaching device |
| CN105087919B (en) * | 2015-10-07 | 2017-04-19 | 惠安县安保渔船交易服务中心 | Cyclone separation ammonia-leakage-free type copper mine efficient chemical combination leaching device |
| CN105087920A (en) * | 2015-10-07 | 2015-11-25 | 吉首大学 | Environment-friendly efficient copper mine combination leaching device with reverse-cone sieve disc |
| CN111139355A (en) * | 2018-11-06 | 2020-05-12 | 金川集团股份有限公司 | Production line with anti-scaling function for extracting nickel and cobalt from laterite-nickel ore |
| CN112828412A (en) * | 2020-12-28 | 2021-05-25 | 吴俊楠 | Soldering tin stove waste heat treatment equipment based on convection heat transfer |
| CN112828412B (en) * | 2020-12-28 | 2022-12-23 | 杭州余杭冠泰五金有限公司 | Soldering tin stove waste heat treatment equipment based on convection heat transfer |
| CN116356157A (en) * | 2023-04-03 | 2023-06-30 | 西安陕鼓动力股份有限公司 | Device and method for treating ore pulp before and after laterite-nickel ore wet acid leaching reaction |
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Application publication date: 20130102 |