CN107557569B - Complexity separates Method for extracting gold containing golden troilite chloridising roasting - Google Patents
Complexity separates Method for extracting gold containing golden troilite chloridising roasting Download PDFInfo
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- CN107557569B CN107557569B CN201710973488.XA CN201710973488A CN107557569B CN 107557569 B CN107557569 B CN 107557569B CN 201710973488 A CN201710973488 A CN 201710973488A CN 107557569 B CN107557569 B CN 107557569B
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Abstract
The invention discloses a kind of complicated containing golden troilite chloridising roasting separation Method for extracting gold, comprising the following steps: changes raw ore configuration of surface and phase structure by preroast, is convenient for next one-step chlorination parting；The SO that preroast generates2Fume collection is passed through the subsequent chloridising roasting stage；Gold can be made to evaporate in the form of chlorauride and then separate with raw ore controlling corresponding process conditions.With prior art technology ratio, this method operating procedure is simple, and maturing temperature significantly reduces, and golden yield is up to 95% or more, no SO2Discharge, chloride ion utilization rate is high, economic and environment-friendly.The present invention provides the practical approach of extremely efficient and cost-effective for the complicated development and utilization containing golden troilite.
Description
Technical field
The present invention relates to non-ferrous metal dchlorine metallurgy field, in particular to a kind of side containing high efficiency extraction gold in golden troilite
Method.
Background technique
As gold consumption demand constantly increases, the yield of gold does not catch up with production development far, and China easily selects gold mine to provide
Source increasingly totally, thus how efficiently, economic, environmentally friendly development process difficult-treating gold mine is particularly important.According to statistics, difficult
The share that the golden reserves of complex gold ores resource account for global golden reserves has reached 70%, however since utilization rate is lower, gold
The 8% of the world yield Jin Zhan gold yield.High sulfur type troilite is a kind of valuable source of difficult-treating gold mine resource, in world's gold mine
Account for about 30%~40% in resource.In the gold reserve that China has detected, 40%~50% is difficult high sulfur type sulphur iron
Mine.This kind of gold mine is since the disseminated grain size of gold is thinner, and the sulfide minerals such as pyrite, mispickel are to the package of gold, it is difficult to
It is directly leached using cyaniding.Due to lacking golden extraction process efficiently, inexpensive, these difficult-treating gold mines just become " slow-witted
Mine ".Difficult-treating gold mine resource is distributed widely in the areas such as China northeast, northwest and south China, southwest, wherein newly, Yunnan, sweet, osmanthus,
Larger proportion is occupied in the western provinces and regions such as blueness, river, Shan, Guizhou Province, also has certain reserves in provinces and regions such as Guangdong, the Liao Dynasty, Hunan, Jiangxi, and sorrow is firm
Mountain, Dian Guiling, the sweet three pan concentration zones in Sichuan and Shanxi most of gold mine be all difficult-treating gold mine.It thus is seen that difficult-treating gold mine
Resource has extremely huge potential age deduction in China.However, this part mineral exploitation utilizes difficult, traditional handicraft
Complexity, recovery rate of valuable metals is low, easily causes the waste of resource, the loss of valuable metal, and bring the hidden danger of Environmental security.
Therefore, developmental research one kind can efficiently utilize the technology of difficult-treating gold mine resource, for improving China's silver smelting industry
Core competitiveness, the sustainable development path for expanding resource have highly important strategic importance.
For the embedding cloth of fine particles, the difficult-treating gold mine of high-sulfur, for the high efficiency extraction for realizing gold, chlorinating roasting is common place
The method for managing difficult-treating gold mine.It can be divided into two classes: one is chloridizing roast in medium tempera-ture, i.e., in the temperature for being lower than chlorinating agent boiling point
Under, it is fired and the agglomerate containing chlorination metal is made, and then dissolved, metal target is enable to separate with impurity；The second is
High-temp chlorination volatilization, i.e., carry out calcination process in the case where being higher than chlorinating agent boiling temperature, and chlorination metal is made to volatilize in a gaseous form ease
Out, to achieve the purpose that separate with impurity.Common chlorinating agent has alkali or alkaline earth metal chloride (such as NaCl and CaCl2
Deng).Chlorinating roasting have many advantages, such as it is high to the adaptable of raw material, gold recovery, but at present chloridising roasting fado be applied to
Golden recycling in cyanidation tailings or smelting slag, the research that gold is directly extracted from complicated difficult-treating gold mine is relatively fewer, and chlorine
It is also relatively high (mostly at 1200 DEG C or more) to change maturing temperature.
The present invention is extracted using the method for " preroast-chloridising roasting " containing the gold in golden troilite.It is waved using chloridising roasting
Hair method is reacting by chlorinating agent and Gold in Ores, and the process conditions such as control pre-calcination temperature, chloridising roasting temperature, time make
Gold is changed into chlorauride, and then by the high volatile of chlorauride, to achieve the purpose that extract separation gold.
Summary of the invention
The present invention can be used for Au plasma in the complicated troilite containing gold, provide a kind of new method for chlorinated gold extracting.This
Invention specifically provides a kind of complicated separation of the troilite chloridising roasting containing gold Method for extracting gold, first by flotation containing golden sulphur iron
Mine is enriched with to be formed containing golden troilite Gold Concentrate under Normal Pressure, then by preroast the sulphur in Gold Concentrate under Normal Pressure is first evaporated, then adds
Chlorinating agent, the sulfur dioxide that pelletizing granulation is passed through preroast generation carry out chloridising roasting, to realize gold from troilite efficiently
Separation.
The present invention is realized by following technical proposal.
A, golden pyrite flotation will be contained to obtain containing golden troilite Gold Concentrate under Normal Pressure, to Gold Concentrate under Normal Pressure preroast, obtain roasting material and pre-
Baking flue gas collects the flue gas that preroast generates, and is used for next step chloridising roasting process.
B, water is added to mix sufficiently roasting material and chlorinating agent, pelletizing granulation, then it is passed through the flue gas of preroast generation, carry out chlorine
Change roasting to get chlorauride and fired slags are arrived.
Further, the essential mineral containing golden troilite Gold Concentrate under Normal Pressure is pyrite, and main component iron, sulphur are respectively 12
~ 20wt.% and 10 ~ 18wt.%, quartz content are no more than 40wt.%, and gold grade is 12 ~ 28 g/t.
Further, pre-calcination temperature described in step A is 500 ~ 600 DEG C, 0.5 ~ 1h of calcining time.
Further, chlorinating agent is NaCl, MgCl in step B2、CaCl2One or more of compounding, chlorinating agent be added
Amount is the 5 ~ 10% of roasting material weight.
Further, chloridising roasting process is continually fed into preroast flue gas in step B, and throughput is 10 ~ 30mL/min.
Further, maturing temperature described in step B is 800 ~ 850 DEG C, and calcining time is 1.5h ~ 2h.
The present invention handles Gold Concentrate under Normal Pressure with preroast, releases SO while changing the structure of mineral2, avoid traditional primary
Roast SO2The shortcomings that being unable to fully reaction.Chloridising roasting process passes through the additional amount of control chlorinating agent, calcining time, roasting temperature
The process conditions such as degree, it is ensured that golden volatility reaches 95% or more, realizes that the efficient volatilization of gold is extracted.
The method that present invention preroast and chloridising roasting combine handles Gold Concentrate under Normal Pressure, changes the structure of mineral, improves
The extent of reaction and reaction speed of gold and chlorinating agent；The sulfur dioxide generated after preroast is used for chloridising roasting process, promotes chlorine
Changing while gold generates reduces SO2Discharge and reduce maturing temperature, realize chloridising roasting process it is environmentally protective.The work
Skill technology has obvious novelty, provides a kind of environmentally protective new way to mention gold containing golden troilite.
Detailed description of the invention
Fig. 1: process flow chart of the invention.
Specific embodiment
Comparative example 1
100g is contained into golden troilite Gold Concentrate under Normal Pressure and 5g sodium chloride mixes, pelletizing granulation roasts 2h at 1200 DEG C, obtains chlorine
Change gold and fired slags.It is controlled by conditions above, golden volatility is 89%.
Embodiment 1
100g is contained into golden troilite Gold Concentrate under Normal Pressure and carries out preroast 0.5h at 500 DEG C, obtains roasting material and preroast flue gas.
Roasting material and 5g sodium chloride are mixed, pelletizing granulation roasts 1.5h, and be passed through preroast flue gas with 10mL/min at 800 DEG C,
Obtain chlorauride and fired slags.It is controlled by conditions above, golden volatility has reached 95%.
Embodiment 2
100g is contained into golden troilite Gold Concentrate under Normal Pressure and carries out preroast 1h at 550 DEG C, obtains roasting material and preroast flue gas.It will
Roasting material and the mixing of 10g sodium chloride, pelletizing granulation roast 1.5h, and be passed through preroast flue gas with 20mL/min at 800 DEG C,
Obtain chlorauride and fired slags.It is controlled by conditions above, golden volatility has reached 95%.
Embodiment 3
100g is contained into golden troilite Gold Concentrate under Normal Pressure and carries out preroast 1h at 600 DEG C, obtains roasting material and preroast flue gas.It will
Roasting material and the mixing of 5g calcium chloride, pelletizing granulation roast 1.5h, and be passed through preroast flue gas with 30mL/min at 850 DEG C, obtain
To chlorauride and fired slags.It is controlled by conditions above, golden volatility has reached 96%.
Embodiment 4
100g is contained into golden troilite Gold Concentrate under Normal Pressure and carries out preroast 1h at 600 DEG C, obtains roasting material and preroast flue gas.It will
Roasting material and 5g inorganic chlorinated agent double salt (sodium chloride and calcium chloride arbitrary proportion) mixing, pelletizing granulation roast at 850 DEG C
1.5h, and preroast flue gas is passed through with 10mL/min, obtain chlorauride and fired slags.It is controlled by conditions above, golden volatilization
Rate has reached 97%.
Embodiment 5
100g is contained into golden troilite Gold Concentrate under Normal Pressure and carries out preroast 0.5h at 500 DEG C, obtains roasting material and preroast flue gas.
Roasting material and 8g inorganic chlorinated agent double salt (sodium chloride and magnesium chloride arbitrary proportion) are mixed, pelletizing granulation roasts at 800 DEG C
1.5h, and preroast flue gas is passed through with 10mL/min, obtain chlorauride and fired slags.It is controlled by conditions above, golden volatilization
Rate has reached 96%.
Embodiment 6
100g is contained into golden troilite Gold Concentrate under Normal Pressure and carries out preroast 1h at 550 DEG C, obtains roasting material and preroast flue gas.It will
Roasting material and 10g inorganic chlorinated agent double salt (calcium chloride and magnesium chloride arbitrary proportion), pelletizing granulation, 800 DEG C of roasting 1.5h, and with
15mL/min is passed through preroast flue gas, obtains chlorauride and fired slags.It is controlled by conditions above, golden volatility reaches
95%。
Claims (3)
1. a kind of complicated containing golden troilite chloridising roasting separation Method for extracting gold, which comprises the following steps:
A, golden troilite Gold Concentrate under Normal Pressure will be contained and carry out preroast, pre-calcination temperature is 500 ~ 600 DEG C, and 0.5 ~ 1h of calcining time is obtained
Roasting material and preroast flue gas collect the flue gas that preroast generates, and are used for next step chloridising roasting process；
B, water is added to mix sufficiently roasting material and chlorinating agent, chlorinating agent additional amount is the 5 ~ 10% of roasting material weight, and pelletizing is pelletized,
It is passed through the flue gas of preroast generation again, throughput is 10 ~ 30mL/min, carries out chloridising roasting, and maturing temperature is 800 ~ 850 DEG C,
Calcining time is 1.5h ~ 2h to get chlorauride and fired slags are arrived, and golden volatility reaches 95% or more.
2. the method according to claim 1, wherein the troilite Gold Concentrate under Normal Pressure essential mineral containing gold is Huang Tie
Mine, main component iron, sulphur are respectively 12 ~ 20wt.% and 10 ~ 18wt.%, and quartz content is no more than 40wt.%, and gold grade is 12 ~ 28
g/t。
3. the method according to claim 1, wherein chlorinating agent is NaCl, MgCl in step B2、CaCl2In one
Kind or several compoundings.
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