CN102416288B - Method for separating and recovering valuable metal chloride and hydrogen chloride from high-temperature chloridizing metallurgy flue gas - Google Patents
Method for separating and recovering valuable metal chloride and hydrogen chloride from high-temperature chloridizing metallurgy flue gas Download PDFInfo
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Abstract
The invention relates to a method for separating and recovering valuable metal chloride and hydrogen chloride from high-temperature chloridizing metallurgy flue gas, which comprises the following steps of: 1) cooling the flue gas, namely cooling 700 to 800 DEG C high-temperature chloridizing metallurgy flue gas to the temperature of not higher than 80 DEG C; and partially condensing the valuable metal chloride into dust and liquid fog or liquid drops; 2) eluting the valuable metal chloride, namely contacting a high-valent metal chloride solution with the cooled flue gas, washing the valuable metal chloride dust and liquid fog or liquid drops, and absorbing gaseous valuable metal chloride; and removing the valuable metal chloride from the flue gas, wherein high-valent metal chloride is water-soluble metal chloride which does not comprise monovalent alkali metal chloride, and the high-valent metal chloride solution comprises 3.0 to 4.0mol/L high-valent metal chloride and 0.1 to 1.0mol/L HCl; 3) absorbing the hydrogen chloride, namely absorbing the hydrogen chloride in the eluted flue gas by using water or dilute hydrochloric acid, removing the hydrogen chloride from the flue gas, and preparing hydrochloric acid; and 4) washing the flue gas from which the hydrogen chloride is removed by using alkali, and purifying eluent. By the technical scheme, valuable metal compound and the hydrogen chloride can be economically separated and recovered on a large scale.
Description
Technical field
The present invention relates to the process extracting valuable metal from low content non-ferrous metal complex materials, particularly a kind of method processing dchlorine metallurgy flue gas.
Background technology
At present, the annual production of China's major metal material all occupies first place in the world.Huge metal material production scale, accelerates the exhaustion of non-renewable mineral resources; In order to solve more and more serious shortage of resources problem, China promotes mineral resources investment overseas energetically, relies on mineral products import, alleviates inadequate resource.Meanwhile, rely on technological progress, process low-grade refractory process mineral resources; Greatly develop secondary resource to recycle, increase the utilization rate of natural resources mineral products.
Low-grade refractory process mineral resources and secondary resource, have that valuable metal content is low, source resource is rich and varied and uncertain, complicated component and the feature such as content fluctuation is large, thus cause existing classical metallurgical method cannot meet the basic demand of the economy of process required by this type of material, ecological property, high efficiency and the aspect such as comprehensive.Various metal and oxide, sulfide and other complex compounds, under certain condition, most chlorine that all can be very high with chemism forms the metal chloride with the bright otherness of performance, thus carries out METAL EXTRACTION by metal chloride and be separated.This dchlorine metallurgy method, has great advantage at process low-grade refractory process metalliferous material.
In the high-temperature chlorization craft of process low content non-ferrous metal complex materials, generally adopt solid chlorinating agent.Gas chlorination agent (Cl is produced under certain condition by solid chlorinating agent
2; HCl) chlorination process of valuable metal is realized.Industrial conventional solid chlorinating agent is NaCl and CaCl
2; CaCl
2be usually used in the high temperature chlorination roasting technique under higher temperature; And NaCl is usually used in the chloridizing roast in medium tempera-ture technique under lower temperature, also in high temperature chlorination roasting technique.
Large quantifier elimination shows, in high temperature chlorination roasting process, solids gasification agent promotes to produce gaseous chlorine agent by acidic oxide:
2NaCl+SiO
2+1/2O
2＝＝Na
2SiO
3+Cl
2
CaCl
2+SiO
2+1/2O
2＝＝CaSiO
3+Cl
2
When having moisture to exist in high temperature system, following reaction will be there is:
Cl
2+H
2O＝＝2HCl+1/2O
2
The existence of moisture can promote that solid chlorinating agent is converted into HCl greatly; Because process adopts hydrogen-containing fuel (generating water after burning) and moisture in raw material, therefore in the high temperature system of this moisture content, valuable metal is chlorinated by reacting with HCl.
Dchlorine metallurgy method is being taken seriously after solving the problem such as equipment and materials, technical scheme practical difficulties in recent years, and being expected to becomes following important non-ferrous metal metallurgy method.High-temp chlorination volatilization is the important method of the low-grade non-ferrous metal material of process (extremely low-grade ore deposit and secondary resource), makes valuable metal form gas phase chlorination thing and enters flue gas, then reclaim by high-temp chlorination; In order to obtain higher metal recovery rate, chlorinating agent consumption is excessive, thus can produce excessive hydrogen chloride in high temperature system.Therefore when the low-grade non-ferrous metal material of if chlorination volatilization process, except containing except the priceless compositions such as nitrogen, carbon dioxide, steam and oxygen in flue gas, containing valency metal chloride and hydrogen chloride; In typical chloridizing volatilization metallurgical process high-temperature flue gas, main component is at present: nitrogen 50 ~ 65%, carbon dioxide 15 ~ 25%, steam 5 ~ 10%, hydrogen chloride 3 ~ 5%, metal chloride 0.5 ~ 2%.
At present by reclaiming valuable metal compound by the method for the chloride in solution washing, absorption flue gas and hydrogen chloride.But valuable metal chloride and hydrogen chloride gas are rapidly absorbed into solution simultaneously, obtain the valuable metal chloride solution that concentration of hydrochloric acid is higher, bring difficulty to subsequent treatment.Therefore research and develop a kind of method that can be used for metal chloride and hydrogen chloride in scale, economically separation and recovered flue gas, employing if chlorination volatilization process various low content non-ferrous metal complex materials is extremely important.
Summary of the invention
The object of the invention is to: for the valuable metal compound in the flue gas produced in if chlorination volatilization process various low content non-ferrous metal complex materials process and hydrogen chloride, and provide a kind of and can realize scale and the technical scheme being separated and reclaiming valuable metal compound and hydrogen chloride economically.
Technical scheme of the present invention comprises following processing step:
1) flue gas cooling: 700 ~ 800 DEG C of high-temp chlorination metallurgical gas are cooled to not higher than the temperature of 80 DEG C; Valuable metal chloride portion is condensed into dust, and liquid mist and/or drop;
2) wash-out valuable metal chloride: contact with cooled flue gas with high-valency metal chloride solution, washs valuable metal chloride dust, and liquid mist and/or drop, and absorption gaseous metal chlorides, removes valuable metal chloride from flue gas; Described high-valency metal chloride is except monoacidic base metal chloride, water-soluble metal chloride; In high-valency metal chloride solution, metal chlorination substrate concentration is 3.0 ~ 4.0mol/L and HCl concentration is 0.1 ~ 1.0mol/L;
3) hydrogen chloride absorption: through 2) flue gas water after step wash-out or watery hydrochloric acid absorbing hydrogen chloride, remove the hydrogen chloride in flue gas, obtained hydrochloric acid;
4) remove the flue gas after hydrogen chloride, then carry out purifying (until can enter in air) through neutralizing treatment, de-liquid.
During non-ferrous metal material low-grade due to high-temp chlorination Metallurgical processing, valuable metal chloride, excessive hydrogen chloride all enter in flue gas with nitrogen, carbon dioxide, oxygen etc., by the above technical scheme of the present invention, the high-temp chlorination metallurgical gas of process, can reach the good technique effect of the synthetical recovery of valuable metal chloride in flue gas and hydrogen chloride.Therefore, technical scheme of the present invention has features simple and practical process, is easy to the good feature of industrialization running.And technical scheme of the present invention can adapt to the chloride volatility process processing procedure of various low content non-ferrous metal complex materials.Reach being separated of valuable metal chloride and hydrogen chloride, reduce the consumption of alkali when valuable metal compound reclaims and other chemical materials, improve the recovery rate of valuable metal in various low content non-ferrous metal complex materials; In addition, by the direct high efficiente callback hydrogen chloride of present invention process; And the chlorinating agent being used as material chlorination process capable of circulation; The advantage of technical solution of the present invention is also construction and the operating cost of the installations and facilities that can reduce chloride volatility process process low-grade non-ferrous metal material processing plant; Improve equipment capacity, save energy consumption.
Described high-valency metal chloride can be one or more in divalent metal chloride (as calcium chloride, magnesium chloride etc.), trivalent metal chloride (as iron chloride, aluminium chloride etc.).
High-valency metal chloride preferentially adopts the calcium chloride or magnesium chloride that cheapness, solubility are large; Eluting liquid preferentially adopts high-valency metal chloride concentration 3.0 ~ 3.5mol/L and HCl concentration 0.2 ~ 0.5mol/L.
Flue gas, after removing valuable metal chloride, can quality of production percent concentration be the hydrochloric acid of 20 ~ 25% with water or watery hydrochloric acid absorbing hydrogen chloride; By desorb-absorption manufacture hydrochloric acid; Also can be used as the raw material producing solid chlorinating agent (as calcium chloride).
The muriatic elution process of valuable metal is dissolving and the absorption process of the contact of gas-liquid-solid, can use wet type operating equipment, as impingement collection device, Venturi tube, no-arbitrary pricing eluting column or turbulent contact absorber etc.; Also 2 ~ 3 grades can be adopted to combine counter-current operations, interior eluent independent loops at different levels, when valuable metal chloride reaches certain content in eluent, reversely change eluent step by step, and discharge high concentration eluent.
High-valency metal chloride solution is 1.0 ~ 1.5mol/L as eluent Absorbable rod valuable metal total chloride concentration; The eluent being absorbed with valency metal chloride can be reclaimed valuable metal compound with the precipitation method or treatment by extraction; Solution after recovery valuable metal compound can return and recycle as eluent after adjustment.
Flue gas cooling adopts segmented mode.First paragraph is by cooling high-temperature fume to 120 ~ 160 DEG C, and most of gaseous state valuable metal chloride is condensed into dust; Flue gas is cooled to not higher than 80 DEG C by second segment, and the water suction of part gaseous state valuable metal chloride dust forms liquid mist or drop.The double diffusion that the present invention is cooled by flue gas advantageously in equipment choosing, and can cool the first step by high-temperature flue gas, Appropriate application Latent heat, recovery heat energy, and prevents smoke behavior from changing adverse effects such as equipment generation burn into blockings; Second step cooling then can use conventional chilling mode, and reduce investment, low latent heat can not add utilization simultaneously.
Due to general valuable metal and compound thereof, can both be chlorinated under certain condition.Therefore, be generally difficult to the various low-grade complex materials with conventional metallurgical method process, can process by dchlorine metallurgy method, and effect can be fully utilized preferably.Adopt the low-grade non-ferrous metal material of high-temp chlorination volatilization process of excess chlorine agent, containing valuable metal chloride and hydrogen chloride in high-temperature flue gas; For avoiding, obtaining the high metal chloride solutions of concentration of hydrochloric acid with solution washing with when absorbing metal chloride and hydrogen chloride gas, a kind of method of separating valuable metals chloride and hydrogen chloride should being adopted.
Present invention process designs ingenious part and is, the present invention by the existence of high price (as divalence, trivalent) metal chloride in eluent, can improve wherein hydrionic activity, namely improve the activity of acid significantly.Relatively not containing the muriatic solution of high-valency metal, significantly improve containing HCl activity in the muriatic solution of high-valency metal, improve the gas phase (H balanced with it simultaneously
2o+HCl) fugacity (namely balancing the dividing potential drop of the HCl in gas phase) of HCl in.
With the mist of absorption process process same amount HCl, the saturation solubility of HCl in high-valency metal chloride solution by remarkable lower than the saturation solubility in water.The chloride solution of low-concentration hcl can as the filtering agent of containing hydrogen chloride and the muriatic mist of non-ferrous metal, condensing metal chloride dust in washing gaseous mixture, absorption gaseous metal chlorides, washing, be absorbed with the flue gas after valency metal chloride again with water or watery hydrochloric acid absorbing hydrogen chloride, reach the object of metal chloride and HCl separation.When valuable metal chloride concentration reaches certain value in acid chlorine salting liquid, reclaim valuable metal compound by methods such as extraction, precipitations.
Research shows, in divalent metal aqueous chloride solution, the saturated concentration of HCl will significantly reduce.MCl
2during total concentration 3.0 ~ 4.5mol/L, under normal temperature, HCl saturated concentration is 0.2 ~ 1.5mol/L; When temperature increases, HCl saturated concentration will be lower.Therefore, containing the muriatic low concentration of salt acid solution of high concentration high-valency metal, can wash and absorb the metal chloride in flue gas, separating metal chloride and hydrogen chloride.
The technical program adopts following process:
1) flue gas cool-down cooling, part metals chloride is condensed into solid-state dust, or is dissolved in condensed water formation liquid mist or drop;
2) pre-cold flue gas enters multistage villaumite washing absorption tower, washing valuable metal chloride dust, liquid mist or drop, and absorbs gaseous state valuable metal chloride; The obtained valuable metal chloride solution containing low-concentration hcl;
3) flue gas after washing removes valuable metal chloride enters multistage absorption tower, and absorbing hydrogen chloride prepares hydrochloric acid;
4) be separated from the valuable metal chloride solution containing low-concentration hcl with extraction, the precipitation method or additive method and prepare valuable metal compound, reclaiming villaumite cleaning solution.
According to the concrete condition of material handling, select the method for suitable separation and recovery valuable metal; The hydrochloric acid produced may be used for chlorinating agent preparation; Be separated and reclaimed the high concentration cl salting liquid of valuable metal, after adjustment, return use.
The present invention has following advantage and good effect:
(1) adopt villaumite washing removal method separating valuable metals chloride and hydrogen chloride, smoke comprehensive utilizes, and reclaims valuable metal compound, has reclaimed hydrogen chloride simultaneously, can produce hydrochloric acid, also can be used for chlorinating agent and produces.
In traditional handicraft, hydrogen chloride and valuable metal chloride washing absorption simultaneously in flue gas, cleaning solution acidity is high, then reclaims valuable metal compound with alkali neutralizing acid, does not utilize hydrogen chloride, and additional consumption alkali and other chemical materials.By the application of this technology, make use of resource, reduce consumption, reduce cost, add income.
(2) adopt villaumite cleaning solution, select to be easy to the high price villaumite with valuable metal compound separation.When processing cleaning solution, convenient recovery valuable metal compound; Recycle villaumite cleaning solution simultaneously.
(3) be separated and reclaim valuable metal chloride and hydrogen chloride, the recovery of valuable metal compound and the recovery of hydrogen chloride are separated, not high by the valuable metal chloride concentration caused due to volatile hydrogen chloride in traditional handicraft; Can require to control valuable metal chloride concentration in cleaning solution arbitrarily according to subsequent treatment process in operation.Improve concentration, be conducive to improving the device processes ability in subsequent technique, reduce processing cost.
(4) absorption of hydrogen chloride separates with valuable metal chloride treatment, by gas cleaning requirement smoke treatment, can facilitate gas cleaning; Make flue gas qualified discharge, improve environment.
(5) rationalization's operation, makes full use of heat energy; Process program adopts sub-sectional cooling, easy to operate, and equipment choosing just obtains, and heat utilization rate is high.
Accompanying drawing explanation
Accompanying drawing is process chart of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described further.The present invention can implement by the either type of summary of the invention.Providing of these embodiments limits the present invention anything but.
Embodiment 1
Pyrite cinder high-temp chlorination volatilization roasting fume treatment:
Slag valuable metal content (%) is: Cu 0.40 ~ 0.50; Pb 0.15 ~ 0.20; Zn 0.55 ~ 0.65; Ag 30 ~ 40g/ ton.
Slag is with 4 ~ 5%CaCl
2for chlorinating agent, be fuel with fine coal in rotary kiln, oxygen-enriched combustion-supporting carries out chloridizing volatilization roasting at 1000 ~ 1050 DEG C, the volatility (%) of each valuable metal element is: Cu 91.4; Pb 96.1; Zn 97.6; Ag 95.5.
High-temperature flue gas is cooled to 75 ~ 78 DEG C; Import 3 grades of tower combination wash-outs; Use 3.5mol/L MgCl
2, the 0.3mol/L HCl aqueous solution is the muriatic eluent of valuable metal.Flue gas gas enters from the 1st grade, discharges successively after 2 grades, 3 grades; Three grades of towers and operational factor are together.After valuable metal chloride content reaches 1.0mol/L in wash-out the 1st grade of eluent, discharge, and change eluent at different levels successively: the 2nd grade of tower eluent proceeds to the 1st grade of tower, and 3rd level tower eluent proceeds to the 2nd grade of tower, and 3rd level tower more renews eluent.The total valuable metal total concentration 1.22mol/L of exudate, 3.2mol/L MgCl
2, 0.28mol/L HCl; The trapping rate of recovery (%) of each valuable element is: Cu 90.6; Pb 95.1; Zn 96.4; Ag 88.3.
Wash-out flue gas imports 2 grades of combined column absorbing hydrogen chlorides again; The hydrochloric acid composition of output is: 22.6%HCl.
Embodiment 2
The chloridizing volatilization baking flue gas process of low-grade tin ore::
Tin ore valuable metal content (%) is: Sn 1.4 ~ 2.0; Pb 2.0 ~ 4.0; Zn 1.0 ~ 1.5;
Tin ore is with 4 ~ 5%CaCl
2for chlorinating agent, be fuel with fine coal in rotary kiln, oxygen-enriched combustion-supporting carries out chloridizing volatilization roasting, and control CO/CO in furnace gas at 1000 ~ 1050 DEG C
2for ~ 0.5, the volatility (%) of each valuable element is: Sn 96.2; Pb 94.4; Zn 71.6;
High-temperature flue gas is cooled to 45 ~ 50 DEG C; Import 2 grades of tower combination wash-out valuable metals; Two towers and operational factor are together.Eluent is 3.0mol/L MgCl
2, the 0.5mol/L HCl aqueous solution.Wash the 1st grade of de-liquid wash after middle valuable metal chloride content reaches 1.0mol/L when de-, discharge, and change eluent at different levels successively: the 2nd grade of tower eluent proceeds to the 1st grade of tower, and the 2nd grade of tower more renews eluent.The composition of discharging eluent is: valuable metal total concentration 1.44mol/L, 2.8mol/LMgCl
2, HCl 0.35mol/L; The trapping rate of recovery (%) of each valuable element is: Sn 94.9; Pb 93.4; Zn 71.1
Wash-out gas imports 2 grades of combination absorbing hydrogen chlorides again.The hydrochloric acid composition of output is: 20.7%HCl.
Embodiment 3
The chloridizing volatilization roasting of poor bismuth complicated ore
The main component (%) of poor bismuth mineral: Bi 0.2 ~ 0.4; SiO
235 ~ 45; CaO 10 ~ 15.
Poor bismuth mineral is with 5 ~ 6%CaCl
2for chlorinating agent, enter rotary kiln (draw ratio 12), take fine coal as fuel, oxygen-enriched combustion-supporting volatilizees in 800 ~ 850 DEG C of chloridising roastings; Bismuth volatility is 93.7%.
High-temperature flue gas is cooled to 60 ~ 65 DEG C; Import 2 grades of combination wash-out valuable metal chlorides; Eluent is 3.2mol/L CaCl
2, the 0.2mol/L HCl aqueous solution.After bi content reaches 1.0mol/L in wash-out the 1st grade of eluent, discharge, and change eluent at different levels successively: the 2nd grade of eluent proceeds to the 1st grade of tower, and the 2nd grade more renews eluent.The composition of discharging eluent is: bismuth chloride 1.06mol/L, 3.0mol/L CaCl
2, 0.28mol/L HCl; The trapping rate of recovery (%) is 91.6%.
Demercuration gaseous mixture imports 2 grades of combined column absorbing hydrogen chlorides again.The hydrochloric acid composition of output is: 24.7%HCl.
Embodiment 4
The chloridizing volatilization baking flue gas process of copper metallurgy high temperature dilution slag
The main component (%) of copper metallurgy high temperature dilution slag: Cu 0.6 ~ 1.0; FeO 50 ~ 55; SiO
240 ~ 45; CaO ~ 5.0.
Dilution stove is with 6 ~ 7%CaCl
2for chlorinating agent, enter rotary kiln (draw ratio 12), take fine coal as fuel, oxygen-enriched combustion-supporting waves with the volatility of copper as 92.7% in 1050 ~ 1100 DEG C of temperature chloridising roastings;
High-temperature flue gas is cooled to 60 ~ 65 DEG C; Import 3 grades of combined column wash-outs; Eluent is 3.5mol/L MgCl
2, the 0.2mol/LHCl aqueous solution; Three grades of tower operational factors are same.After copper chloride content reaches 1.0mol/L in wash-out the 1st grade of eluent, discharge, and change eluent at different levels successively: the 2nd grade of tower eluent proceeds to the 1st grade of tower, and 3rd level tower eluent proceeds to the 2nd grade of tower, and 3rd level tower more renews eluent.Discharge eluent main component: copper chloride 1.35mol/L, 3.2mol/LMgCl
2, 0.31mol/LHCl; The trapping rate of recovery (%) is 91.8%.
Wash-out flue gas imports 2 grades of combined column absorbing hydrogen chlorides again.The hydrochloric acid composition of output is: 23.8%HCl.
Claims (9)
1. from high-temp chlorination metallurgical gas, be separated and reclaim a method for valuable metal chloride and hydrogen chloride, comprise following processing step:
1) flue gas cooling: 700 ~ 800 DEG C of high-temp chlorination metallurgical gas are cooled to temperature not higher than 80 DEG C; Valuable metal chloride portion is condensed into dust, and liquid mist or drop; Wherein, flue gas cooling adopts segmented mode; High-temp chlorination metallurgical gas is cooled to 120 ~ 160 DEG C by first paragraph, and most of gaseous state valuable metal chloride is condensed into dust; Flue gas is cooled to not higher than 80 DEG C by second segment, and the water suction of part gaseous state valuable metal chloride dust forms liquid mist or drop;
2) wash-out valuable metal chloride: contact with cooled flue gas with high-valency metal chloride solution, washs valuable metal chloride dust, and liquid mist or drop, absorption gaseous state valuable metal chloride; Valuable metal chloride is removed from flue gas; Described high-valency metal chloride is containing promising except monoacidic base metal chloride, water-soluble metal chloride, and the concentration contained in described high-valency metal chloride solution is the high-valency metal chloride of 3.0 ~ 4.0mol/L and concentration is the HCl of 0.1 ~ 1.0mol/L;
3) hydrogen chloride absorption: wash-out flue gas water or watery hydrochloric acid absorbing hydrogen chloride, remove the hydrogen chloride in flue gas, and obtained hydrochloric acid;
4) remove the flue gas after hydrogen chloride, then purify through neutralizing treatment, de-liquid.
2. the method being separated from high-temp chlorination metallurgical gas and reclaiming valuable metal chloride and hydrogen chloride according to claim 1, is characterized in that: described high-valency metal chloride is one or more in divalent metal chloride, trivalent metal chloride.
3. the method being separated from high-temp chlorination metallurgical gas and reclaiming valuable metal chloride and hydrogen chloride according to claim 2, is characterized in that: described divalent metal chloride is calcium chloride or magnesium chloride; Described trivalent metal chloride is iron chloride or aluminium chloride.
4. the method being separated and reclaiming valuable metal chloride and hydrogen chloride from high-temp chlorination metallurgical gas according to claim 1 or 2 or 3, it is characterized in that: in high-valency metal chloride solution, high-valency metal chloride concentration is 3.0 ~ 3.5mol/L, HCl concentration is 0.2 ~ 0.5mol/L.
5. the method being separated and reclaiming valuable metal chloride and hydrogen chloride from high-temp chlorination metallurgical gas according to claim 1 or 2 or 3, is characterized in that: high-valency metal chloride solution is 1.0 ~ 1.5mol/L as the absorbable valuable metal total chloride concentration of eluent.
6. the method being separated and reclaiming valuable metal chloride and hydrogen chloride from high-temp chlorination metallurgical gas according to claim 1 or 2 or 3, it is characterized in that: after high-valency metal chloride solution is absorbed with valency metal chloride as eluent, the precipitation method or treatment by extraction can be adopted to reclaim valuable metal chloride; Solution after recovery valuable metal chloride returns and recycles as eluent after adjustment concentration and acidity.
7. the method being separated and reclaiming valuable metal chloride and hydrogen chloride from high-temp chlorination metallurgical gas according to claim 1 or 2 or 3, it is characterized in that: flue gas is after removing valuable metal chloride, and producing containing HCl mass percent concentration with water or watery hydrochloric acid absorbing hydrogen chloride is the hydrochloric acid of 20 ~ 25%; By desorb-absorption manufacture hydrochloric acid or the raw material being used as production solid chlorinating agent.
8. the method being separated and reclaiming valuable metal chloride and hydrogen chloride from high-temp chlorination metallurgical gas according to claim 1 or 2 or 3, it is characterized in that: the muriatic elution process of valuable metal is dissolving and the absorption process of gas-liquid-solid contact, uses wet type operating equipment; Or adopting 2 ~ 3 grades of combination counter-current operations, interior eluent independent loops at different levels, when valuable metal chloride reaches regulation content in eluent, reversely changes eluent step by step, and discharges this eluent.
9. the method being separated from high-temp chlorination metallurgical gas and reclaiming valuable metal chloride and hydrogen chloride according to claim 8, is characterized in that: wet type operating equipment is impingement collection device, Venturi tube, no-arbitrary pricing eluting column or turbulent contact absorber.
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| EP0635282A1 (en) * | 1993-07-23 | 1995-01-25 | Abb Research Ltd. | Method for treatment of residual material of incinerators |
| EP0553146B1 (en) * | 1990-10-17 | 1995-05-10 | Noell-KRC Umwelttechnik GmbH | Process for purifying flue gases with a high chloride content |
| CN101508449A (en) * | 2009-03-27 | 2009-08-19 | 中南大学 | Method for pre-de-magnesium enriched lithium from salt lake bittern with high-magnesium-lithium ratio with dry method de-magnesium |
| CN101643858A (en) * | 2009-06-22 | 2010-02-10 | 云南锡业集团（控股）有限责任公司 | High temperature chlorination processing method of lateritic nickel ore |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0553146B1 (en) * | 1990-10-17 | 1995-05-10 | Noell-KRC Umwelttechnik GmbH | Process for purifying flue gases with a high chloride content |
| EP0635282A1 (en) * | 1993-07-23 | 1995-01-25 | Abb Research Ltd. | Method for treatment of residual material of incinerators |
| CN101508449A (en) * | 2009-03-27 | 2009-08-19 | 中南大学 | Method for pre-de-magnesium enriched lithium from salt lake bittern with high-magnesium-lithium ratio with dry method de-magnesium |
| CN101643858A (en) * | 2009-06-22 | 2010-02-10 | 云南锡业集团（控股）有限责任公司 | High temperature chlorination processing method of lateritic nickel ore |
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