CN104294052B - A kind of preprocess method of noble metal metallurgy flue dust - Google Patents
A kind of preprocess method of noble metal metallurgy flue dust Download PDFInfo
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- CN104294052B CN104294052B CN201410501342.1A CN201410501342A CN104294052B CN 104294052 B CN104294052 B CN 104294052B CN 201410501342 A CN201410501342 A CN 201410501342A CN 104294052 B CN104294052 B CN 104294052B
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Abstract
The invention discloses a kind of simple, efficient noble metal metallurgy flue dust preprocess method, by objectionable impurities elements such as the selenium in the preprocess method energy efficient removal noble metal metallurgy flue dust, mercury and base metals, the noble metal such as gold, silver in flue dust is set to be enriched with significantly, it is high by noble metal materials noble metal grade resulting after the method pretreatment, impurity content is few, directly can be reclaimed with existing ripe precious metal refinery technology.
Description
Technical field
The invention belongs to the noble metal recovery technology field in nonferrous smelting industry, and in particular to a kind of molten from noble metal
The preprocess method of the valuable element such as synthetical recovery gold, silver, selenium, mercury in refining flue dust.
Technical background
Noble metal metallurgy flue dust mentioned by the present invention refers to being produced during pyrometallurgical smelting in noble metals such as gold, silver
Raw flue dust.Main valuable element is the noble metals such as gold, silver in the flue dust, while selenium, mercury element content are higher.
At present, during domestic noble metal pyrometallurgical smelting, can some noble metal fine particles dust it is miscellaneous with volatility
High-temperature flue gas produced by matter enter flue, and cooling is deposited in flue.Due to containing precious metal element in this part flue dust,
Recovery must be subject to avoids valuable metal from losing.By institute's smelting noble metals material and the difference of slag former, noble metal metallurgy cigarette
Each element and grade are not quite similar in dirt, wherein gold grade it is general in 0.2 ~ 2.5%, silver-colored grade in 2 ~ 8%, selenium grade
It is 6% or so in 5 ~ 10%, mercury grade.Domestic majority smelting enterprise takes and for noble metal metallurgy flue dust directly to return to noble metal
The mode for refining production system is recycled, and on the one hand the processing mode easily causes the objectionable impurities elements such as selenium, mercury in life
Product system interior circulation is accumulated, and is unfavorable for the stability of daily production, another aspect selenium, mercury etc. impurity content is high to be unfavorable for
The purification of the noble metal products such as gold, silver.
Chinese invention patent CN102784721B（Application number 201210296461.9）" it is enriched with back from poisonous smelting smoke dust
The method for receiving selenium mercury " provides one kind and will prepare flotation pulp after flue dust ore grinding, and selenium, mercury in flue dust are reclaimed by way of flotation
Processing method.The method by adjusting slurry pH, without collecting agent and foaming agent, under conditions of only adding inhibitor
Carry out roughing, it is selected, scan, the mode for obtaining selenium concentrate and mercury concentrate reclaims selenium, mercury.Due to the particularity of noble metal materials,
Taking ore-dressing technique to process must uncertain factor easily causes noble metal damage while increase security supplementary measures, and in ore dressing process
Lose.Therefore the flotation processing method that the patent of invention is provided is unsuitable for processing noble metal metallurgy flue dust.
Li Ying etc. exists《Divide silver stove flue dust silver, selenium synthetical recovery new technology》（《Non-ferrous metal（Smelting Part）》.2011,10：
34-36）In mention a kind of by acidleach --- floatation process, reclaim silver, the handling process of selenium in flue dust.The technique passes through sulfuric acid
Leach and sodium chlorate leach deselenization, selenium is reclaimed from deselenization liquid, deselenization slag is enriched with silver, selenium through the mode that ore dressing obtains silver preparation concentrate,
Realize that silver, selenium are separated with lead.All contain selenium in sulphuric leachate, sodium chlorate reinforcing deselenization liquid and silver preparation concentrate in the technical process,
Selenium element is excessively disperseed, and is unfavorable for further reclaiming selenium.Meanwhile, equally exist due to from uncertain caused by ore-dressing technique
Property precious metal losses.
In view of the particularity of noble metal materials, precious metal losses and the quick recovery of noble metal should be avoided to should be first will
Business, therefore, noble metal metallurgy flue dust should as far as possible take a kind of simple, rapid handling process, the wherein valuable unit of synthetical recovery
Element.
The content of the invention
The present invention is intended to provide a kind of simple, efficient noble metal metallurgy flue dust preprocess method, by the pretreatment side
The objectionable impurities elements such as selenium, mercury and base metal in method energy efficient removal noble metal metallurgy flue dust, make your gold such as gold, silver in flue dust
Category is enriched with significantly, and high by noble metal materials noble metal grade resulting after the method pretreatment, impurity content is few, Ke Yizhi
Connect and reclaimed with existing precious metal refinery technology.
The technical proposal of the invention is realized in this way：
A kind of preprocess method of noble metal metallurgy flue dust, comprises the following steps：
Step one, the removing of noble metal metallurgy flue dust Strengthen education include the soluble impurity element of base metal：
Stirring is opened after adding water in the acid tolerance response container of band stirring, acid for adjusting pH value is added 0.5 ~ 6.5；Add
Noble metal metallurgy flue dust, it is 1 that addition presses solvent and solute weight ratio:1~10:1；It is to be mixed it is uniform after, add 1% hydrotropy of flue dust weight
Agent；
Strengthen education 0.5h ~ 4h at a temperature of 25 ~ 95 DEG C, leaching terminates rear separation of solid and liquid, obtains phase analysis and immersion liquid；Phase analysis
Into step 2, water process is sent in immersion liquid；
Step 2, noble metal metallurgy flue dust phase analysis catalysis oxidation roasting removing selenium, mercury；
After phase analysis drying, the catalyst of phase analysis weight 1% is added to be well mixed；Catalysis oxidation roasting is carried out under oxidizing atmosphere
Burn, 450 ~ 700 DEG C of sintering temperature, 2 ~ 5h of roasting time obtains baking flue gas and fired slags；
Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate；Fired slags reclaim expensive by precious metal refinery
Metal.
Wherein it is preferred to, the acid added in the step one is the nitration mixture of any one of sulfuric acid or hydrochloric acid or both, compared with
Sour addition high is conducive to base metal elements to remove.
Wherein it is preferred to, cosolvent is in molar ratio 7 in the step one:2:1 zinc powder for mixing, ortho phosphorous acid
The mixture of sodium and sodium pyrosulfite.
Wherein it is preferred to, the temperature of Strengthen education is 70 ~ 80 DEG C, it is necessary to explanation, leaching higher in the step one
Go out temperature to be conducive to shortening extraction time.
Wherein it is preferred to, catalyst is in molar ratio 2 in the step 2:1 cupric oxide for mixing and sodium chloride
Mixture.
Wherein it is preferred to, the temperature of catalysis oxidation roasting is 600 ~ 650 DEG C in the step 2.
Wherein it is preferred to, in the step 2 catalysis oxidation roasting time can by depending on baking flue gas amount, it is necessary to illustrate
Be that roasting time more long is conducive to selenium mercury element fully to remove.
Beneficial effects of the present invention are as follows：
1）By Strengthen education, most of soluble impurity in noble metal metallurgy flue dust, noble metal and selenium, mercury unit can be removed
Plain to be all enriched in phase analysis, leached mud rate is low, and only 20% or so；
2）It is calcined by catalysis oxidation, can substantially removes selenium, mercury element, the rate of burning till is only 50% or so, the fired slags for obtaining
With the features such as noble metal grade is high, impurity content is few；
3）Most of impurity is removed during the preprocessing process can make noble metal metallurgy flue dust, by pre-processing noble metal unit
Element can be enriched with more than 10 times, and precious metal element grade can reach more than 60% even more high, can use existing ripe precious metal refinery work
Skill directly refines recovery；
4）By the preprocessing process, the selenium being stripped of in noble metal metallurgy flue dust, mercury etc. are unfavorable for that precious metal refinery is carried
Pure harmful element, makes the reduction of noble metal, purification become easy；
5）By the preprocessing process, the poisonous and harmful element such as selenium, the mercury being separated and recovered from noble metal metallurgy flue dust,
Avoid environmental pollution and the occupational health infringement to operating personnel；
6）Non precious metal loss, realizes the separation and recovery of each valuable element in the preprocessing process, preferably solves
The problem of valuable metal recovery in noble metal metallurgy flue dust.
Brief description of the drawings
Fig. 1 is process chart of the invention.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention is described further：
A kind of preprocess method of noble metal metallurgy flue dust, comprises the following steps：
Step one, the removing of noble metal metallurgy flue dust Strengthen education include the soluble impurity element of base metal：
Stirring is opened after adding water in the acid tolerance response container of band stirring, acid for adjusting pH value is added 0.5 ~ 6.5；Add
Noble metal metallurgy flue dust, it is 1 that addition presses solvent and solute weight ratio:1~10:1；It is to be mixed it is uniform after, add 1% hydrotropy of flue dust weight
Agent；
Strengthen education 0.5h ~ 4h at a temperature of 25 ~ 95 DEG C, leaching terminates rear separation of solid and liquid, obtains phase analysis and immersion liquid；Phase analysis
Into step 2, water process is sent in immersion liquid.
Step 2, noble metal metallurgy flue dust phase analysis catalysis oxidation roasting removing selenium, mercury；
After phase analysis drying, the catalyst of phase analysis weight 1% is added to be well mixed；Catalysis oxidation roasting is carried out under oxidizing atmosphere
Burn, 450 ~ 700 DEG C of sintering temperature, 2 ~ 5h of roasting time obtains baking flue gas and fired slags；
Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate；Fired slags reclaim expensive by precious metal refinery
Metal.
Embodiment 1
Certain noble metal metallurgy flue dust, its main component and content are：Au 0.58%、Ag 5.9%、Se 5.32%、Hg
6.22%th, C 2.14%, Na 9.11%, Zn 2.39%, Cl 46.6%, noble metal grade total about 6.5%.Specific pre-treatment step
It is as follows：
1）Stirring is opened after adding 1500mL water in the acid tolerance response container of band stirring, addition sulphur acid for adjusting pH value is
0.5, it is 3 to add noble metal metallurgy flue dust 500g, i.e. solvent and solute weight ratio:1.It is to be mixed it is uniform after, add cosolvent zinc powder
2.65g, sodium hypophosphite 1.24g, sodium pyrosulfite 1.11g.
2）Control temperature carries out Strengthen education for 70 DEG C, and Strengthen education 1.5h is leached after terminating, and separation of solid and liquid is soaked
Slag and immersion liquid, phase analysis carry out catalysis oxidation roasting, and water process is sent in immersion liquid.
3）Phase analysis are dried, and add catalyst to be well mixed, and addition is cupric oxide 0.80g, sodium chloride 0.30g.In oxidation
Catalysis oxidation roasting is carried out under atmosphere, it is 650 DEG C, roasting time 3.0h to control sintering temperature.Obtain baking flue gas and fired slags.
4）Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate.Fired slags are reclaimed by precious metal refinery
Noble metal.
By pretreatment, noble metal gold and silver grade adds up to 68.07% in noble metal metallurgy flue dust, is enriched with about 10.5 times, can
Directly refining is reclaimed.Selenium removal efficiency about 97.5% in noble metal metallurgy flue dust, mercury removal rate about 98.7%, preferably realize selenium,
The separation and recovery of mercury element, it is to avoid it is to the harmful effect caused by production, environment, occupational health.
Embodiment 2
Certain noble metal metallurgy flue dust, its main component and content are：Au 0.21%、Ag 8.0%、Se 5.03%、Hg
5.98%th, C 1.46%, Na 9.32%, Zn 4.51%, Cl 44.9%, noble metal grade total about 8.2%.Specific pre-treatment step
It is as follows：
1）Stirring is opened after adding 1500mL water in the acid tolerance response container of band stirring, addition salt acid for adjusting pH value is
1.5, it is 1 to add noble metal metallurgy flue dust 1500g, i.e. solvent and solute weight ratio:1.It is to be mixed it is uniform after, add cosolvent zinc powder
7.96g, sodium hypophosphite 3.71g, sodium pyrosulfite 3.33g.
2）Control temperature carries out Strengthen education for 95 DEG C, and Strengthen education 3.0h is leached after terminating, and separation of solid and liquid is soaked
Slag and immersion liquid.Phase analysis carry out catalysis oxidation roasting, and water process is sent in immersion liquid.
3）Phase analysis are dried, and add catalyst to be well mixed, and addition is cupric oxide 2.34g, sodium chloride 0.86g, in oxidation
Catalysis oxidation roasting is carried out under atmosphere, controls sintering temperature for 700 DEG C, roasting time 2.0h obtains baking flue gas and fired slags.
4）Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate.Fired slags are reclaimed by precious metal refinery
Noble metal.
By pretreatment, noble metal gold and silver grade adds up to 81.67% in noble metal metallurgy flue dust, is enriched with about 10.0 times, can
Directly refining is reclaimed.Selenium removal efficiency about 97.2% in noble metal metallurgy flue dust, mercury removal rate about 98.6%, preferably realize selenium,
The separation and recovery of mercury element, it is to avoid it is to the harmful effect caused by production, environment, occupational health.
Embodiment 3
Certain noble metal metallurgy flue dust, its main component and content are：Au 2.48%、Ag 2.1%、Se 9.96%、Hg
6.44%th, C 3.70%, Na 8.16%, Zn 1.55%, Cl 44.1%, noble metal grade total about 4.6%.Specific pre-treatment step
It is as follows：
1）Stirring is opened after adding 2100mL water in the acid tolerance response container of band stirring, sulfuric acid is added:Hydrochloric acid is 1:1
Mixed acid for adjusting pH value is 2.5, and it is 7 to add noble metal metallurgy flue dust 300g, i.e. solvent and solute weight ratio:1.It is to be mixed it is uniform after, add
Cosolvent zinc powder 1.59g, sodium hypophosphite 0.74g, sodium pyrosulfite 0.67g.
2）Control temperature carries out Strengthen education for 50 DEG C, and Strengthen education 4.0h is leached after terminating, and separation of solid and liquid is soaked
Slag and immersion liquid, phase analysis carry out catalysis oxidation roasting, and water process is sent in immersion liquid.
3）Phase analysis are dried, and add catalyst to be well mixed, and addition is cupric oxide 0.51g, sodium chloride 0.19g, in oxidation
Catalysis oxidation roasting is carried out under atmosphere, controls sintering temperature for 640 DEG C, roasting time 5.0h obtains baking flue gas and fired slags.
4）Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate.Fired slags are reclaimed by precious metal refinery
Noble metal.
By pretreatment, noble metal gold and silver grade adds up to 60.23% in noble metal metallurgy flue dust, is enriched with about 13.1 times, can
Directly refining is reclaimed.Selenium removal efficiency about 98.0% in noble metal metallurgy flue dust, mercury removal rate about 99.0%, preferably realize selenium,
The separation and recovery of mercury element, it is to avoid it is to the harmful effect caused by production, environment, occupational health.
Embodiment 4
Certain noble metal metallurgy flue dust, its main component and content are：Au 0.34%、Ag 6.7%、Se 6.39%、Hg
6.18%th, C 2.53%, Na 11.97%, Zn 4.04%, Cl 40.3%, noble metal grade total about 7.0%.Specific pre-treatment step
It is as follows：
1）Stirring is opened after adding 3000mL water in the acid tolerance response container of band stirring, sulfuric acid is added:Hydrochloric acid is 2:1
Mixed acid for adjusting pH value is 6.5, and it is 10 to add noble metal metallurgy flue dust 300g, i.e. solvent and solute weight ratio:1.It is to be mixed it is uniform after, add
Cosolvent zinc powder 1.59g, sodium hypophosphite 0.74g, sodium pyrosulfite 0.67g；
2）Control temperature carries out Strengthen education for 25 DEG C, and Strengthen education 0.5h is leached after terminating, and separation of solid and liquid is soaked
Slag and immersion liquid, phase analysis carry out catalysis oxidation roasting, and water process is sent in immersion liquid.
3）Phase analysis are dried, and add catalyst to be well mixed, and addition is cupric oxide 0.44g, sodium chloride 0.16g, in oxidation
Catalysis oxidation roasting is carried out under atmosphere, controls sintering temperature for 560 DEG C, roasting time 4.5h obtains baking flue gas and fired slags.
4）Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate.Fired slags are reclaimed by precious metal refinery
Noble metal.
By pretreatment, noble metal gold and silver grade adds up to 71.36% in noble metal metallurgy flue dust, is enriched with about 10.2 times, can
Directly refining is reclaimed.Selenium removal efficiency about 97.5% in noble metal metallurgy flue dust, mercury removal rate about 98.7%, preferably realize selenium,
The separation and recovery of mercury element, it is to avoid it is to the harmful effect caused by production, environment, occupational health.
Embodiment 5
Certain noble metal metallurgy flue dust, its main component and content are：Au 1.51%、Ag 5.3%、Se 7.43%、Hg
6.24%th, C 1.16%, Na 7.88%, Zn 2.49%, Cl 46.3%, noble metal grade total about 6.8%.Specific pre-treatment step
It is as follows：
1）Stirring is opened after adding 2000mL water in the acid tolerance response container of band stirring, addition sulphur acid for adjusting pH value is
2.0.It is 2 to add noble metal metallurgy flue dust 1000g, i.e. solvent and solute weight ratio:1.It is to be mixed it is uniform after, add cosolvent zinc powder
5.31g, sodium hypophosphite 2.47g, sodium pyrosulfite 2.22g.
2）Control temperature carries out Strengthen education for 65 DEG C, and Strengthen education 2.5h is leached after terminating, and separation of solid and liquid is soaked
Slag and immersion liquid, phase analysis carry out catalysis oxidation roasting, and water process is sent in immersion liquid.
3）Phase analysis are dried, and add catalyst to be well mixed, and addition is cupric oxide 1.54g, sodium chloride 0.56g, in oxidation
Catalysis oxidation roasting is carried out under atmosphere, controls sintering temperature for 450 DEG C, roasting time 3.5h obtains baking flue gas and fired slags.
4）Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate.Fired slags are reclaimed by precious metal refinery
Noble metal.
By pretreatment, noble metal gold and silver grade adds up to 71.42% in noble metal metallurgy flue dust, is enriched with about 10.5 times, can
Directly refining is reclaimed.Selenium removal efficiency about 97.0% in noble metal metallurgy flue dust, mercury removal rate about 98.5%, preferably realize selenium,
The separation and recovery of mercury element, it is to avoid it is to the harmful effect caused by production, environment, occupational health.
Embodiment 6
Certain noble metal metallurgy flue dust, its main component and content are：Au 1.89%、Ag 3.1%、Se 5.38%、Hg
6.18%、C 4.01%、Na 10.04%、Zn 3.22%、Cl 45.0%.Noble metal grade total about 5.0%, specific pre-treatment step
It is as follows：
1）Stirring is opened after adding 2400mL water in the acid tolerance response container of band stirring, sulfuric acid is added:Hydrochloric acid is 3:1
Mixed acid for adjusting pH value is 4.0.It is 6 to add noble metal metallurgy flue dust 600g, i.e. solvent and solute weight ratio:1.It is to be mixed it is uniform after, add
Cosolvent zinc powder 3.19g, sodium hypophosphite 1.48g, sodium pyrosulfite 1.33g.
2）Control temperature carries out Strengthen education for 35 DEG C, and Strengthen education 3.0h is leached after terminating, and separation of solid and liquid is soaked
Slag and immersion liquid, phase analysis carry out catalysis oxidation roasting, and water process is sent in immersion liquid.
3）Phase analysis are dried, and add catalyst to be well mixed, and addition is cupric oxide 0.88g, sodium chloride 0.32g, in oxidation
Catalysis oxidation roasting is carried out under atmosphere, controls sintering temperature for 680 DEG C, roasting time 4.0h obtains baking flue gas and fired slags.
4）Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate, and fired slags are reclaimed by precious metal refinery
Noble metal.
By pretreatment, noble metal gold and silver grade adds up to 61.12% in noble metal metallurgy flue dust, is enriched with about 12.2 times, can
Directly refining is reclaimed.Selenium removal efficiency about 97.9% in noble metal metallurgy flue dust, mercury removal rate about 98.9%, preferably realize selenium,
The separation and recovery of mercury element, it is to avoid it is to the harmful effect caused by production, environment, occupational health.
Embodiment 7
Certain noble metal metallurgy flue dust, its main component and content are：Au 0.46%、Ag 7.1%、Se 6.27%、Hg
6.33%th, C 3.22%, Na 10.45%, Zn 2.94%, Cl 42.2%, noble metal grade total about 7.6%.Specific pre-treatment step
It is as follows：
1）Stirring is opened after adding 3000mL water in the acid tolerance response container of band stirring, addition salt acid for adjusting pH value is
0.5, it is 5 to add noble metal metallurgy flue dust 600g, i.e. solvent and solute weight ratio:1.It is to be mixed it is uniform after, add cosolvent zinc powder
3.19g, sodium hypophosphite 1.48g, sodium pyrosulfite 1.33g.
2）Control temperature carries out Strengthen education for 90 DEG C, and Strengthen education 0.5h is leached after terminating, and separation of solid and liquid is soaked
Slag and immersion liquid, phase analysis carry out catalysis oxidation roasting, and water process is sent in immersion liquid.
3）Phase analysis are dried, and add catalyst to be well mixed, and addition is cupric oxide 0.95g, sodium chloride 0.35g, in oxidation
Catalysis oxidation roasting is carried out under atmosphere, controls sintering temperature for 630 DEG C, roasting time 2.5h obtains baking flue gas and fired slags；
4）Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate.Fired slags are reclaimed by precious metal refinery
Noble metal.
By pretreatment, noble metal gold and silver grade adds up to 75.88% in noble metal metallurgy flue dust, is enriched with about 10.0 times, can
Directly refining is reclaimed.Selenium removal efficiency about 97.1% in noble metal metallurgy flue dust, mercury removal rate about 98.5%, preferably realize selenium,
The separation and recovery of mercury element, it is to avoid it is to the harmful effect caused by production, environment, occupational health.
Embodiment 8
Certain noble metal metallurgy flue dust, its main component and content are：Au 0.66%、Ag 6.5%、Se 9.34%、Hg
6.21%th, C 2.16%, Na 8.77%, Zn 1.64%, Cl 44.8%, noble metal grade total about 7.2%.Specific pre-treatment step
It is as follows：
1）Stirring is opened after adding 2000mL water in the acid tolerance response container of band stirring, addition salt acid for adjusting pH value is
4.5, it is 4 to add noble metal metallurgy flue dust 500g, i.e. solvent and solute weight ratio:1.It is to be mixed it is uniform after, add cosolvent zinc powder
2.65g, sodium hypophosphite 1.24g, sodium pyrosulfite 1.11g.
2）Control temperature carries out Strengthen education for 75 DEG C, and Strengthen education 4.0h is leached after terminating, and separation of solid and liquid is soaked
Slag and immersion liquid, phase analysis carry out catalysis oxidation roasting, and water process is sent in immersion liquid.
3）Phase analysis are dried, and add catalyst to be well mixed, and addition is cupric oxide 0.80g, sodium chloride 0.30g, in oxidation
Catalysis oxidation roasting is carried out under atmosphere, controls sintering temperature for 460 DEG C, roasting time 5.0h obtains baking flue gas and fired slags.
4）Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate.Fired slags are reclaimed by precious metal refinery
Noble metal.
By pretreatment, noble metal gold and silver grade adds up to 72.71% in noble metal metallurgy flue dust, is enriched with about 10.1 times, can
Directly refining is reclaimed.Selenium removal efficiency about 97.3% in noble metal metallurgy flue dust, mercury removal rate about 98.6%, preferably realize selenium,
The separation and recovery of mercury element, it is to avoid it is to the harmful effect caused by production, environment, occupational health.
Embodiment 9
Certain noble metal metallurgy flue dust, its main component and content are：Au 0.80%、Ag 5.9%、Se 6.27%、Hg
6.09%th, C 2.87%, Na 9.01%, Zn 1.83%, Cl 46.1%, noble metal grade total about 6.7%.Specific pre-treatment step
It is as follows：
1）Stirring is opened after adding 1500mL water in the acid tolerance response container of band stirring, addition sulphur acid for adjusting pH value is
6.0, it is 3 to add noble metal metallurgy flue dust 500g, i.e. solvent and solute weight ratio:1.It is to be mixed it is uniform after, add cosolvent zinc powder
2.65g, sodium hypophosphite 1.24g, sodium pyrosulfite 1.11g.
2）Control temperature carries out Strengthen education for 55 DEG C, and Strengthen education 2.0h is leached after terminating, and separation of solid and liquid is soaked
Slag and immersion liquid, phase analysis carry out catalysis oxidation roasting, and water process is sent in immersion liquid.
3）Phase analysis are dried, and add catalyst to be well mixed, and addition is cupric oxide 0.80g, sodium chloride 0.30g, in oxidation
Catalysis oxidation roasting is carried out under atmosphere, controls sintering temperature for 550 DEG C, roasting time 3.5h obtains baking flue gas and fired slags.
4）Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate.Fired slags are reclaimed by precious metal refinery
Noble metal.
By pretreatment, noble metal gold and silver grade adds up to 67.10% in noble metal metallurgy flue dust, is enriched with about 10.0 times, can
Directly refining is reclaimed.Selenium removal efficiency about 97.2% in noble metal metallurgy flue dust, mercury removal rate about 98.6%, preferably realize selenium,
The separation and recovery of mercury element, it is to avoid it is to the harmful effect caused by production, environment, occupational health.
Embodiment 10
Certain noble metal metallurgy flue dust, its main component and content are：Au 1.22%、Ag 5.0%、Se 8.16%、Hg
5.90%th, C 1.65%, Na 10.99%, Zn 3.67%, Cl 41.9%, noble metal grade total about 6.2%.Specific pre-treatment step
It is as follows：
1）Stirring is opened after adding 2400mL water in the acid tolerance response container of band stirring, sulfuric acid is added:Hydrochloric acid is 1:1
Mixed acid for adjusting pH value is 3.0, and it is 8 to add noble metal metallurgy flue dust 300g, i.e. solvent and solute weight ratio:1.It is to be mixed it is uniform after, add
Cosolvent zinc powder 1.59g, sodium hypophosphite 0.74g, sodium pyrosulfite 0.67g.
2）Control temperature carries out Strengthen education for 80 DEG C, and Strengthen education 1.0h is leached after terminating, and separation of solid and liquid is soaked
Slag and immersion liquid, phase analysis carry out catalysis oxidation roasting, and water process is sent in immersion liquid.
3）Phase analysis are dried, and add catalyst to be well mixed, and addition is cupric oxide 0.44g, sodium chloride 0.16g, in oxidation
Catalysis oxidation roasting is carried out under atmosphere, controls sintering temperature for 650 DEG C, roasting time 4.0h obtains baking flue gas and fired slags.
4）Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate.Fired slags are reclaimed by precious metal refinery
Noble metal.
By pretreatment, noble metal gold and silver grade adds up to 64.46% in noble metal metallurgy flue dust, is enriched with about 10.4 times, can
Directly refining is reclaimed.Selenium removal efficiency about 97.8% in noble metal metallurgy flue dust, mercury removal rate about 98.9%, preferably realize selenium,
The separation and recovery of mercury element, it is to avoid it is to the harmful effect caused by production, environment, occupational health.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (5)
1. a kind of preprocess method of noble metal metallurgy flue dust, it is characterised in that：Comprise the following steps：
Step one, the removing of noble metal metallurgy flue dust Strengthen education include the soluble impurity element of base metal：
Stirring is opened after adding water in the acid tolerance response container of band stirring, acid for adjusting pH value is added 0.5 ~ 6.5；Your gold added
Category melting flue dust, it is 1 that addition presses solvent and solute weight ratio:1~10:1；It is to be mixed it is uniform after, add 1% cosolvent of flue dust weight；
Strengthen education 0.5h ~ 4h at a temperature of 25 ~ 95 DEG C, leaching terminates rear separation of solid and liquid, obtains phase analysis and immersion liquid；Phase analysis enter
Water process is sent in step 2, immersion liquid；
Step 2, noble metal metallurgy flue dust phase analysis catalysis oxidation roasting removing selenium, mercury；
After phase analysis drying, 1% catalyst of phase analysis weight is added to be well mixed；Catalysis oxidation roasting is carried out under oxidizing atmosphere, is roasted
450 ~ 700 DEG C of temperature is burnt, 2 ~ 5h of roasting time obtains baking flue gas and fired slags；
Through absorbing, selenium, mercury are separated baking flue gas, obtain impure selenium and mercury concentrate；Fired slags reclaim noble metal by precious metal refinery；
Cosolvent is in molar ratio 7 in the step one:2:1 zinc powder for mixing, sodium hypophosphite and sodium pyrosulfite
Mixture；Catalyst is in molar ratio 2 in the step 2:The mixture of 1 cupric oxide for mixing and sodium chloride.
2. the preprocess method of a kind of noble metal metallurgy flue dust according to claim 1, it is characterised in that：The step one
The acid of middle addition is the nitration mixture of any one of sulfuric acid or hydrochloric acid or both, and sour addition higher is conducive to base metal elements to take off
Remove.
3. the preprocess method of a kind of noble metal metallurgy flue dust according to claim 1, it is characterised in that：The step one
The temperature of middle Strengthen education is for 70 ~ 80 DEG C, it is necessary to illustrate, extraction temperature higher is conducive to shortening extraction time.
4. the preprocess method of a kind of noble metal metallurgy flue dust according to claim 1, it is characterised in that：The step 2
The temperature of middle catalysis oxidation roasting is 600 ~ 650 DEG C.
5. the preprocess method of a kind of noble metal metallurgy flue dust according to claim 1, it is characterised in that：The step 2
The time of middle catalysis oxidation roasting can by depending on baking flue gas amount, it is necessary to explanation is that roasting time more long is conducive to selenium mercury unit
Plain fully removing.
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