CN103952546A - Steam heating device and method for pressurized oxygen leaching of zinc sulfide concentrate - Google Patents
Steam heating device and method for pressurized oxygen leaching of zinc sulfide concentrate Download PDFInfo
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- CN103952546A CN103952546A CN201410193975.0A CN201410193975A CN103952546A CN 103952546 A CN103952546 A CN 103952546A CN 201410193975 A CN201410193975 A CN 201410193975A CN 103952546 A CN103952546 A CN 103952546A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a steam heating device for pressurized oxygen leaching of a zinc sulfide concentrate. The device comprises a solution inlet pipeline, a steam inlet pipeline, a high-pressure kettle and a flash tank, wherein a discharge port in the tail end of the high-pressure kettle is connected with a feed port of the flash tank; the solution inlet pipeline is directly communicated with the inner part of the high-pressure kettle from the front end of the high-pressure kettle; the steam inlet pipeline is directly communicated with the inner part of the high-pressure kettle from the bottom of the high-pressure kettle. The invention also discloses a steam heating method for performing pressurized oxygen leaching on the zinc sulfide concentrate by using the device. According to the steam heating device and method for pressurized oxygen leaching of the zinc sulfide concentrate, disclosed by the invention, the effect of the flash tank is fully considered; a solution in a pressure vessel is subjected to direct steam heating by using the thermal equilibrium characteristics of the solution in the pressure vessel under certain temperature and pressure conditions; part of water brought into the solution by the steam can be evaporated into the water again and carried out from the solution by virtue of a flash vaporization process; only the steam for keeping the heat required for heating the solution is changed into water and left in the solution so as to maintain the thermal equilibrium of the solution in the pressure vessel without causing system solution volume expansion.
Description
Technical field
The invention belongs to technical field of wet metallurgy, be specifically related to a kind of steam heater for zinc sulfide concentrates pressure leaching and method.
Background technology
Wet method zinc smelting system liquor capacity balance is the problem that must extremely pay close attention in production process, because production process misoperation, will expand by generation systems liquor capacity, it is certain due to wet method zinc, smelting total system volume of equipment, once system liquor capacity expands, it is more difficult reducing volume, spended time is longer, and production process does not allow solution to leak, therefore, generally take the mode that reduces charging capacity to maintain production, so just cause system solution zinc ion concentration to reduce, have a strong impact on system all technical, the major cause of production operation process influence system liquor capacity balance is the water yield that adds system, generally at roasting relieving haperacidity wet method zinc, smelt in production, about 10 tons of ton product zinc water consumption, wherein steam consumption quantity is approximately 3.5～4.5 tons, pressure leaching is not because there is no roasting relieving haperacidity, ton product zinc water consumption is lower, wherein steam consumption quantity is approximately 2.5 tons, therefore, it is the key factor that anti-locking system liquor capacity expands that control adds the water yield of wet method zinc smelting system and quantity of steam, generally add the water of system to have wash-down water, middle water after sewage disposal etc., for steam heating solution, adopt indirect heating mode as far as possible, to prevent that steam from becoming water and entering system, cause system liquor capacity to expand.
In traditional zinc sulfide concentrates pressure leaching is produced, solution is added to two kinds of modes of thermal recovery, first kind of way enters autoclave again to entering after autoclave feed liquid before adopts interchanger steam indirect heating, the second way is that coil pipe is set in autoclave, to entering the solution of autoclave, adopts steam indirect heating.Adopt the mode of interchanger steam indirect heating solution, because solution is higher containing acid, solid content is larger, Heating temperature is high, often cause interchanger corrosion leakage, solid particulate stops up, maintenance of the equipment workload is large, adopt the mode of autoclave inner coil pipe steam indirect heating solution, due to the High Temperature High Pressure peracid effect in autoclave, coil pipe is fragile, need often to change, more seriously because be provided with coil pipe in autoclave, cause material to circulate in autoclave not smooth, often stop up autoclave, cause and stop still snaking, have a strong impact on production, because autoclave operates under high-temperature and high-pressure conditions, often stop still or drive still to be not easy, operational difficulty.Coil pipe and the interchanger outside autoclave in autoclave have brought a lot of drawbacks, but everybody worries to become water after steam directly enters autoclave, then enter in feed liquid, make the volumetric expansion of feed liquid, think that flash drum only has the function of decrease temperature and pressure, and ignored the function of its draining steam in decrease temperature and pressure process, and therefore all do not have really autoclave to be carried out to structural improvement, do not remove these parts and directly feed liquid and steam are added to autoclave.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art, and a kind of steam heater for zinc sulfide concentrates pressure leaching and method are provided.
In order to achieve the above object, technical scheme provided by the invention is:
The described steam heater for zinc sulfide concentrates pressure leaching comprises that solution enters pipeline, and steam enters pipeline, autoclave, flash drum; The discharge gate of described autoclave tail end is connected with the opening for feed of flash drum; Described solution enters pipeline from autoclave front end directly and autoclave internal communication; Described steam enters pipeline from autoclave base directly and autoclave internal communication.
Wherein, described autoclave top is provided with venting port, and exhaust ports is provided with venting port variable valve.
Described discharge gate place is provided with discharge switch-valve; Described opening for feed place is provided with discharge variable valve.
Solution enters pipeline and is provided with charging switch-valve; The junction that described steam enters pipeline and autoclave is provided with steam regulating valve and steam inlet switch-valve.
Described flash drum is provided with flash drum venting port, and flash drum exhaust ports is provided with flash drum variable valve; Flash drum is also provided with solution outlet on (2), and solution outlet place is provided with stopping valve.
The described steam heating method for zinc sulfide concentrates pressure leaching is used above-mentioned steam heater, and concrete steps are:
(1) open stopping valve F1;
(2) open flash drum variable valve F2, set exhaust pressure 100～200KPa, by controlling the aperture automatic pressure regulation of flash drum variable valve F2, set 102～120 ℃ of exhaust temperatures;
(3) open discharge variable valve F3, set certain flow, according to height of liquid level in autoclave, by controlling the aperture of discharge variable valve F3, carry out flow automatic regulation; Open discharge switch-valve F4;
(4) open venting port variable valve F5, the operating pressure of controlling autoclave is 1000～1200Kpa, prevents that solution in autoclave from " running liquid and emitting groove ";
(5) open charging switch-valve F6; Feed liquid is directly entered in autoclave, and in described feed liquid, the mass percent concentration of solid is 60-70%;
(6) open steam inlet switch-valve F7 and steam regulating valve F8, steam is directly entered in autoclave, by regulating the aperture auto-adjustment control steam flow of F7 and F8, controlling high pressure temperature in the kettle is 120～150 ℃; By steam, the feed liquid in autoclave is directly heated, the feed liquid after being heated enters flash drum and carries out decrease temperature and pressure, then from solution outlet, gets rid of.
Below in conjunction with principle, the invention will be further described:
The present invention has cancelled the steam indirect heating coil pipe in autoclave; By the direct UNICOM of vapour pipe autoclave, adopt the mode of steam direct heating solution; The normal exhaust mouth of pipe at autoclave is set up automatic regulating valve, to control the operating pressure of autoclave, prevents that solution in autoclave from " running liquid and emitting groove "; The solution that adopts flash drum to discharge autoclave carries out decrease temperature and pressure, to maintain solution thermal equilibrium from solution evaporation excessive moisture, and keeping system liquor capacity balance; Reduce the liquid-solid ratio that water mixes with zinc sulfide concentrates, strengthen the solids concn (in mixed ore pulp, the mass percent concentration of solid is 60-70%) of mixed ore pulp, to reduce ore pulp, bring the moisture content of autoclave into.
The present invention takes into full account the effect of flash drum, having overcome existing technical staff worries to become water after steam directly enters autoclave, then enter in feed liquid, make the technology prejudice of the volumetric expansion of feed liquid, utilize the thermally equilibrated characteristic of pressurized vessel solution, under certain temperature and pressure condition, solution in pressurized vessel is adopted to steam direct heating, steam is brought the moisture content of solution into, pass through flash vaporization process, part can flash to again moisture content and take solution out of, only keeping heated solution institute heat requirement steam to become moisture content stays in solution, to maintain pressurized vessel solution thermal equilibrium, can not cause system liquor capacity to expand.
Compared with prior art, beneficial effect of the present invention is:
1, adopt steam direct heating mode, equipment is simple, processing ease, and thermo-efficiency is high;
2, solved employing steam indirect heating solution, the problem that causes the easy burn into solid particulate of equipment to stop up, has solved the solid material stream passed of autoclave not smooth, causes the problem of stopping still snaking;
3, utilize flash vaporization process, the moisture content part of bringing steam into solution flashes to again moisture and takes solution out of, to maintain solution thermal equilibrium in autoclave, keeping system liquor capacity balance;
4, adopt high solid concentration ore pulp to enter autoclave, to reduce ore pulp, bring the moisture content of autoclave into;
5, at zinc sulfide concentrates, carry out in one section of pressure leaching process, can there is thermopositive reaction in zinc sulfide concentrates, the required quantity of steam of direct heating solution is less, and pass through flash vaporization process, the moisture content that can evaporate from solution is by the moisture content that is greater than open steam heated solution and brings into, adopt the mode of autoclave zinc sulfide concentrates pressure leaching open steam heated solution, there is evaporating solns moisture content, the function of reduction system liquor capacity, can prevent corrosion and the blockage problem of equipment, can not cause system liquor capacity to expand.
Accompanying drawing explanation
Fig. 1 is the structural representation of steam heater of the present invention.
In figure, 1, autoclave; 2, flash drum; 3, solution enters pipeline; 4, steam enters pipeline; 5, venting port; 6, discharge gate; 7, opening for feed; 8, flash drum venting port; 9, solution outlet; F1, stopping valve; F2, flash drum variable valve; F3, discharge variable valve; F4, discharge switch-valve; F5, venting port variable valve; F6, charging switch-valve; F7, steam inlet switch-valve; F8, steam regulating valve.
Embodiment
embodiment 1
Referring to Fig. 1, the described steam heater for zinc sulfide concentrates pressure leaching comprises that solution enters pipeline 3, and steam enters pipeline 4, autoclave 1, flash drum 2; The discharge gate 6 of described autoclave 1 tail end is connected with the opening for feed 7 of flash drum 2; It is characterized in that, described solution enters pipeline 3 from autoclave 1 front end directly and autoclave 1 internal communication; Described steam enters pipeline 4 from autoclave 1 bottom directly and autoclave 1 internal communication.
Wherein, described autoclave 1 top is provided with venting port 5, and venting port 5 places are provided with venting port variable valve F5.
Described discharge gate 6 places are provided with discharge switch-valve F4; Described opening for feed 7 places are provided with discharge variable valve F3.
Solution enters pipeline 3 and is provided with charging switch-valve F6; Described steam enters pipeline 4 and is provided with steam regulating valve F8 and steam inlet switch-valve F7 with the junction of autoclave 1.
Described flash drum 2 is provided with flash drum venting port 8, and flash drum venting port 8 places are provided with flash drum variable valve F2; On flash drum 2, be also provided with solution outlet 9, solution outlet 9 places are provided with stopping valve F1.
embodiment 2
For a steam heating method for zinc sulfide concentrates pressure leaching, described method is used the steam heater described in embodiment 1, and concrete steps are:
(1) open stopping valve F1;
(2) open flash drum variable valve F2, set exhaust pressure 100～200KPa, 102～120 ℃ of exhaust temperatures;
(3) open discharge variable valve F3, open discharge switch-valve F4;
(4) open venting port variable valve F5, the operating pressure of controlling autoclave is 1000～1200KPa;
(5) open charging switch-valve F6; Feed liquid is directly entered in autoclave, and in described feed liquid, the mass percent concentration of solid is 60-70%;
(6) open steam inlet switch-valve F7 and steam regulating valve F8, steam is directly entered in autoclave, controlling high pressure temperature in the kettle is 120～150 ℃; By steam, the feed liquid in autoclave is directly heated, the feed liquid after being heated enters flash drum and carries out decrease temperature and pressure, then from solution outlet, gets rid of.
The solution that enters autoclave is: mixed ore pulp 10m
3/ h(solids concn 65%, moisture 7t/h), spent acid 34m
3the moisture 31t/h of/h(), open autoclave charging switch-valve F
6, solution enters autoclave, opens autoclave steam inlet switch valve F
7, automatic control and adjustment steam regulating valve F
8add steam 1.0t/h, control 120～150 ℃ of the interior solution temperatures of autoclave, the High Temperature High Pressure solution that utilizes flash drum to discharge autoclave carries out decrease temperature and pressure, from solution, evaporate moisture content and enter atmosphere simultaneously, exhaust pressure 100～the 200kPa of flash drum, 102～120 ℃ of exhaust temperatures, enter atmosphere moisture content 5.0t/h.By flash vaporization process, to entering solution water evaporates in autoclave, enter atmosphere 5.0-1.0=4.0t/h more, dwindled liquor capacity.
Claims (6)
1. for a steam heater for zinc sulfide concentrates pressure leaching, described heating unit comprises that solution enters pipeline (3), and steam enters pipeline (4), autoclave (1), flash drum (2); The discharge gate (6) of described autoclave (1) tail end is connected with the opening for feed (7) of flash drum (2); It is characterized in that, described solution enters pipeline (3) from autoclave (1) front end directly and autoclave (1) internal communication; Described steam enters pipeline (4) from autoclave (1) bottom directly and autoclave (1) internal communication.
2. steam heater as claimed in claim 1, is characterized in that, described autoclave (1) top is provided with venting port (5), and venting port (5) locates to be provided with venting port variable valve (F5).
3. steam heater as claimed in claim 2, is characterized in that, described discharge gate (6) locates to be provided with discharge switch-valve (F4); Described opening for feed (7) locates to be provided with discharge variable valve (F3).
4. steam heater as claimed in claim 3, is characterized in that, solution enters pipeline (3) and is provided with charging switch-valve (F6); Described steam enters pipeline (4) and is provided with steam regulating valve (F8) and steam inlet switch-valve (F7) with the junction of autoclave (1).
5. steam heater as claimed in claim 4, is characterized in that, described flash drum (2) is provided with flash drum venting port (8), and flash drum venting port (8) locates to be provided with flash drum variable valve (F2); On flash drum (2), be also provided with solution outlet (9), solution outlet (9) locates to be provided with stopping valve (F1).
6. for a steam heating method for zinc sulfide concentrates pressure leaching, it is characterized in that, described method right to use requires the steam heater described in 5, and concrete steps are:
(1) open stopping valve (F1);
(2) open flash drum variable valve (F2), set exhaust pressure 100～200KPa, 102～120 ℃ of exhaust temperatures;
(3) open discharge variable valve (F3), open discharge switch-valve (F4);
(4) open venting port variable valve (F5), the operating pressure of controlling autoclave is 1000～1200KPa;
(5) open charging switch-valve (F6); Feed liquid is directly entered in autoclave, and in described feed liquid, the mass percent concentration of solid is 60-70%;
(6) open steam inlet switch-valve (F7) and steam regulating valve (F8), steam is directly entered in autoclave, controlling high pressure temperature in the kettle is 120～150 ℃; By steam, the feed liquid in autoclave is directly heated, the feed liquid after being heated enters flash drum and carries out decrease temperature and pressure, then from solution outlet, gets rid of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410193975.0A CN103952546A (en) | 2014-05-09 | 2014-05-09 | Steam heating device and method for pressurized oxygen leaching of zinc sulfide concentrate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410193975.0A CN103952546A (en) | 2014-05-09 | 2014-05-09 | Steam heating device and method for pressurized oxygen leaching of zinc sulfide concentrate |
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| CN103952546A true CN103952546A (en) | 2014-07-30 |
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| CN201410193975.0A Pending CN103952546A (en) | 2014-05-09 | 2014-05-09 | Steam heating device and method for pressurized oxygen leaching of zinc sulfide concentrate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104178627A (en) * | 2014-08-21 | 2014-12-03 | 江苏申港锅炉有限公司 | High-pressure pretreatment system for gold ores |
| CN106222404A (en) * | 2016-09-23 | 2016-12-14 | 中国恩菲工程技术有限公司 | The recovery system of valuable metal |
| CN113244855A (en) * | 2021-06-21 | 2021-08-13 | 中国恩菲工程技术有限公司 | Flash tank and smelting pressurization system |
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| CN1936033A (en) * | 2006-10-19 | 2007-03-28 | 沈阳铝镁设计研究院 | Bauxite stripping process by Bayer process |
| AU2009200702A1 (en) * | 2008-02-25 | 2009-09-10 | Gme Resources Ltd | Acid recovery |
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| CN203820864U (en) * | 2014-05-09 | 2014-09-10 | 长沙有色冶金设计研究院有限公司 | Steam heating device for pressure oxidationleaching of zinc sulfideconcentrates |
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2014
- 2014-05-09 CN CN201410193975.0A patent/CN103952546A/en active Pending
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| CN1936033A (en) * | 2006-10-19 | 2007-03-28 | 沈阳铝镁设计研究院 | Bauxite stripping process by Bayer process |
| AU2009200702A1 (en) * | 2008-02-25 | 2009-09-10 | Gme Resources Ltd | Acid recovery |
| CN202497871U (en) * | 2012-04-17 | 2012-10-24 | 长沙有色冶金设计研究院有限公司 | Normal safety exhaust pipeline of reaction kettle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104178627A (en) * | 2014-08-21 | 2014-12-03 | 江苏申港锅炉有限公司 | High-pressure pretreatment system for gold ores |
| CN106222404A (en) * | 2016-09-23 | 2016-12-14 | 中国恩菲工程技术有限公司 | The recovery system of valuable metal |
| CN106222404B (en) * | 2016-09-23 | 2019-04-09 | 中国恩菲工程技术有限公司 | The recovery system of valuable metal |
| CN113244855A (en) * | 2021-06-21 | 2021-08-13 | 中国恩菲工程技术有限公司 | Flash tank and smelting pressurization system |
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Application publication date: 20140730 |