CN104109763B - A kind of difficult containing noble metal materials smelting technology - Google Patents
A kind of difficult containing noble metal materials smelting technology Download PDFInfo
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- CN104109763B CN104109763B CN201410244076.9A CN201410244076A CN104109763B CN 104109763 B CN104109763 B CN 104109763B CN 201410244076 A CN201410244076 A CN 201410244076A CN 104109763 B CN104109763 B CN 104109763B
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Abstract
The invention provides a kind of difficult containing noble metal materials smelting technology, belong to gold smelting technical field, it comprises the steps: material to join in melting equipment, add the lead of 10% ~ 20% of quality of material simultaneously, melting 45min ~ 90min under 900 DEG C ~ 1200 DEG C weak reducing atmospheres, obtains melt; The melt obtained is entered electrothermal front bed, is heated to 1000 DEG C ~ 1300 DEG C, then standing separation 30min ~ 60min, after separation, discharge upper strata slag and lower floor's precious metals containing lead respectively; Vacuum distillation furnace is adopted to isolate lead and precious metal, plumbous Returning smelting step, recycle isolated precious metals containing lead; By the precious metal refinery obtained, purify, namely obtain high purity precious metal.Present invention process has that flow process is short, less investment, adaptable feature, is conducive to environment protection.
Description
Technical field
The invention belongs to gold smelting technical field, be specifically related to a kind of difficult containing noble metal materials smelting technology, waiting the precious metals such as the gold and silver in indissoluble mineral for extracting the embedding quartz that is distributed in of microsize grade.
Background technology
The ultimate production about 1/3 of world's gold originates from difficult-treating gold mine, for microsize grade gold content material, particularly gold is with the embedding material be distributed in the indissoluble such as quartz mineral of microsize grade, adopts traditional technology, cyanide leaching is generally no more than 80%, according to certain Production Practice in Enterprises data, cyanide leaching only about 60%, cyanide residue containing gold up to about 15g/t, its reason is mainly caused by silicate parcel particulate gold, not only cause resource serious waste, and cause manufacturing enterprise's deficiency in economic performance, even heavy losses.
The present invention is mainly used in gold smelting, and current gold smelting technique one is cyanide process, two is Bioleaching methods, and three is oxygen leaching, and four is synthetical recovery in copper-lead is smelted.The present invention is directed to the higher cyanide residue of the Gold grade of method one output or high-sulphur and high-arsenic gold concentrate and be not suitable for the raw material that method one processes.Unworkable by bacterium method, high with oxygen leaching investment, add copper-lead smelting and be equivalent to sell raw material, newly-built copper-lead smeltery does not have again copper, lead ore concentrate raw material.
Therefore how overcoming the deficiencies in the prior art is problems that current gold smelting technical field needs solution badly.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, providing a kind of difficult containing noble metal materials smelting technology, this technique has that flow process is short, less investment, strong adaptability, be conducive to the features such as environment protection.
The technical solution used in the present invention is as follows:
A kind of difficult containing noble metal materials smelting technology, comprise the steps:
Step (1), will join in melting equipment containing noble metal materials, add simultaneously containing noble metal materials quality 10 ~ 20% lead, melting 45min ~ 90min under 900 DEG C ~ 1200 DEG C weak reducing atmospheres, obtains melt;
Step (2), melt step (1) obtained sends into electrothermal front bed, is heated to 1000 DEG C ~ 1300 DEG C, then standing separation 30min ~ 60min, isolates upper strata slag and lower floor's precious metals containing lead;
Step (3), sends into isolated for step (2) precious metals containing lead in vacuum distillation furnace, isolates lead and precious metal under vacuum, and lead returns step (1) and participates in melting;
Step (4), is separated step (3) precious metal obtained and carries out conventional refinery, purifies, namely obtains high purity precious metal.
Described melting equipment is rotary kiln or bottom side-blown smelting furnace; The present invention utilizes the rotation of rotary kiln or the air blast of bottom side-blown smelting furnace to stir, and makes the gold in fusion of lead and material have sufficient touch opportunity, thus improves the rate of recovery of the precious metals such as gold and silver.
The lead of described step (1) is the lead in the lead-containing material such as metallic lead or lead anode slurry.
Described step (1) be the cyanide residue of conventional gold smelting output containing noble metal materials, or for through two sections of conventional desulfurization dearsenification sinter processs to high-sulfur high-arsenic material carry out after calcination process containing noble metal materials, wherein high-sulfur high-arsenic material be sulphur content 28 ~ 32%, arsenic content 6 ~ 12% containing noble metal materials.
Described containing noble metal materials to be Gold Content be 6 ~ 15% and silver content be 10 ~ 30% materials.
The precious metals containing lead that described step (3) is separated adopts the precious metal such as vacuum distilling separation of lead and gold and silver, and the lead separated returns step (1) with molten state, is conducive to energy efficient.
The batching object of described step (1): one is make slag type fusing point low, and viscosity is little, two is that weak reducing atmosphere for realizing fusion process creates conditions; The control climate of melting is weak reducing atmosphere, so that the arsenic making material bring into, antimony etc. are tried one's best, volatilization enters flue dust, and that reduces slag contains arsenic, antimony amount, thus creates conditions for output solid waste (slag).
The present invention is mainly used in gold smelting, current gold smelting technique one is cyanide process, two is Bioleaching methods, three is oxygen leaching, four is synthetical recovery in copper-lead is smelted, and the present invention is directed to the higher cyanide residue of the Gold grade of method one output or high-sulphur and high-arsenic gold concentrate and is not suitable for the raw material that method one processes.Unworkable by bacterium method, high with oxygen leaching investment, add copper-lead smelting and be equivalent to sell raw material, newly-built copper-lead smeltery does not have again copper, lead ore concentrate raw material.
compared with prior art, its beneficial effect is in the present invention:(1) the present invention utilizes the low characteristic with trapping the excellences such as gold and silver of plumbous fusing point, lead is being added containing in noble metal materials, with precious metals such as enrichment gold and silver, lead as trapping agent can adopt metallic lead, also can adopt as lead in lead anode slurry etc., make lead and material be the trapping completed under the condition of fully mixing and stirring precious metals such as gold and silver, and lead recycle in whole Production Flow Chart, saving resource; (2); The present invention utilizes the air blast of the rotation of rotary kiln or bottom side-blown smelting furnace stirring to make the gold in fusion of lead and material have sufficient touch opportunity, thus improves the rate of recovery of the precious metals such as gold and silver; (3) present invention process has that flow process is short, less investment, adaptable feature, is conducive to environment protection.
Accompanying drawing explanation
Fig. 1 is the difficult process flow sheet containing noble metal materials smelting technology of the present invention.
Embodiment
Below in conjunction with Fig. 1 and embodiment, the present invention is described in further detail.
Embodiment 1
As shown in Figure 1, for certain gold-bearing material---cyanide residue, containing golden 12g/t, and the silver containing 30g/t, impurity component mainly contains the oxide compound, silicon-dioxide, calcium oxide etc. of iron, pass through material phase analysis, slag type is close to Lead Smelting in Blast Furnace slag type, and material contains arsenic 1.5%, containing antimony 0.5%, its smelting technology, comprises the steps
Step (1), to add stove from the charging opening of bottom side-blown smelting furnace containing noble metal materials, add simultaneously containing noble metal materials quality 15% metallic lead, melting 60min under 900 DEG C of weakly reducing atmospheres, the concentration of precious metal such as gold and silver in material is made in plumbous liquid, to obtain melt;
Step (2), melt step (1) obtained enters electrothermal front bed from side-blown smelting furnace discharge gate bottom smelting furnace, melt is made to continue to be warming up to 1000 DEG C by electrically heated mode, then standing separation 60min, make plumbous liquid and slag good separation, after separation, discharge upper strata slag and lower floor's precious metals containing lead respectively;
Step (3), isolated for step (2) precious metals containing lead is adopted vacuum distillation furnace and isolates lead and precious metal under vacuum, lead returns step (1), continues next cycle operation;
Step (4), refining: precious metal refinery step (3) obtained, purifies, and namely obtains high purity gold and high-purity silver.
Embodiment 2
As shown in Figure 1, for certain high-As and high-S golden ore concentrate hard to treat, containing gold about 18g/t, sulfur-bearing about 30%, containing arsenic about 10%.Its smelting technology, comprises the steps:
First conventional two-stage roasting technique desulfurization dearsenification is adopted;
Step (1), second segment roasting high-temperature roasting ore deposit out is directly entered rotary kiln melting, add simultaneously containing noble metal materials quality 15% lead anode slurry in lead, under smelting temperature is 1200 DEG C of weakly reducing atmospheres, melting 90min, the concentration of precious metal such as gold and silver in material is made in plumbous liquid, to obtain melt;
Step (2), enters electrothermal front bed by the melt that step (1) obtains from rotary kiln discharge gate, is heated to 1300 DEG C, then standing separation 60min, makes plumbous liquid and slag good separation, discharges upper strata slag and lower floor's precious metals containing lead after separation respectively;
Step (3), adopts vacuum distillation furnace by isolated for step (2) precious metals containing lead and under vacuum, isolate lead and precious metal, lead returns step (1), continues next cycle operation;
Step (4), by the precious metal refinery that step (3) obtains, purifies, namely obtains high purity gold.
Embodiment 3
As shown in Figure 1, for certain high-As and high-S golden ore concentrate hard to treat, containing gold about 18g/t, sulfur-bearing about 30%, containing arsenic about 10%.Its smelting technology, comprises the steps:
First conventional two-stage roasting technique is adopted to carry out desulfurization dearsenification to raw material;
Step (1), directly enters rotary kiln melting by second segment roasting high-temperature roasting ore deposit out, add simultaneously containing noble metal materials quality 10% metallic lead, under smelting temperature is 1100 DEG C of weakly reducing atmospheres, melting 45min, makes the concentration of precious metal such as gold and silver in material in plumbous liquid, obtain melt;
Step (2), enters electrothermal front bed by the melt that step (1) obtains from rotary kiln discharge gate, is heated to 1200 DEG C, then standing separation 30min, makes plumbous liquid and slag good separation, discharges upper strata slag and lower floor's precious metals containing lead after separation respectively;
Step (3), isolated for step (2) precious metals containing lead is adopted vacuum distillation furnace and isolates lead and precious metal under vacuum, lead returns step (1), continues next cycle operation;
Step (4), by the precious metal refinery that step (3) obtains, purifies, namely obtains high purity gold.
Embodiment 4
As shown in Figure 1, for certain high-As and high-S golden ore concentrate hard to treat, containing gold about 18g/t, sulfur-bearing about 30%, containing arsenic about 10%.Its smelting technology, comprises the steps:
First conventional two-stage roasting technique is adopted to carry out desulfurization dearsenification to raw material;
Step (1), the high-temperature roasting ore deposit obtained through above-mentioned two-stage calcination technique is directly entered rotary kiln melting, add simultaneously containing noble metal materials quality 20% lead anode slurry in lead, under smelting temperature is 1000 DEG C of weakly reducing atmospheres, smelting time 60min, the concentration of precious metal such as gold and silver in material is made in plumbous liquid, to obtain melt;
Step (2), enters electrothermal front bed by the melt that step (1) obtains from rotary kiln discharge gate, is heated to 1100 DEG C, then standing separation 40min, makes plumbous liquid and slag good separation, discharges upper strata slag and lower floor's precious metals containing lead after separation respectively;
Step (3), isolated for step (2) precious metals containing lead is adopted vacuum distillation furnace and isolates lead and precious metal under vacuum, lead returns step (1), continues next cycle operation;
Step (4), refining: precious metal refinery step (3) obtained, purifies, namely obtains high purity gold.
Claims (3)
1. difficult containing a noble metal materials smelting technology, it is characterized in that comprising the steps:
Step (1), will join in melting equipment containing noble metal materials, add simultaneously containing noble metal materials quality 10 ~ 20% lead, melting 45min ~ 90min under 900 DEG C ~ 1200 DEG C weak reducing atmospheres, obtains melt;
Wherein, containing the cyanide residue that noble metal materials is conventional gold smelting output, or for through two sections of conventional desulfurization dearsenification sinter processs to high-sulfur high-arsenic material carry out after calcination process containing noble metal materials, wherein high-sulfur high-arsenic material be sulphur content 28 ~ 32% and arsenic content 6 ~ 12% containing noble metal materials;
Or, containing noble metal materials to be Gold Content be 6 ~ 15% and silver content be 10 ~ 30% materials;
Step (2), melt step (1) obtained sends into electrothermal front bed, is heated to 1000 DEG C ~ 1300 DEG C, then standing separation 30min ~ 60min, isolates upper strata slag and lower floor's precious metals containing lead;
Step (3), sends into isolated for step (2) precious metals containing lead in vacuum distillation furnace, isolates lead and precious metal under vacuum, and lead returns step (1) and participates in melting;
Step (4), is separated step (3) precious metal obtained and carries out refining, purifies, namely obtains product.
2. according to claim 1 difficult containing noble metal materials smelting technology, it is characterized in that the melting equipment of described step (1) is conventional rotary kiln or bottom side-blown smelting furnace.
3. according to claim 1 difficult containing noble metal materials smelting technology, it is characterized in that the lead of described step (1) is the lead in metallic lead or lead anode slurry.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106676269A (en) * | 2016-12-08 | 2017-05-17 | 中国恩菲工程技术有限公司 | Method for treating cyanide tailings |
| CN107604171A (en) * | 2017-08-25 | 2018-01-19 | 金川集团股份有限公司 | A kind of method of the melting enriching noble metals from complicated high content of nickel copper anode mud leached mud |
| CN108220586A (en) * | 2017-12-28 | 2018-06-29 | 郴州雄风环保科技有限公司 | Noble metal technique is extracted from high-sulfur palladium platinum waste material |
| CN108300869B (en) * | 2018-02-25 | 2020-03-31 | 中南大学 | Method for cold-state mixing of high-arsenic gold ore calcine into bottom-blowing reduction furnace of lead smelting system |
| CN108239707B (en) * | 2018-02-25 | 2020-03-31 | 中南大学 | Method for distributing high-arsenic gold ore calcine into side-blown reduction furnace of lead smelting system |
| MX2023002015A (en) | 2020-08-18 | 2023-04-11 | Enviro Metals Llc | Metal refinement. |
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