CN106219689A - The method producing regular iron-carbon micro-electrolysis filler with high ferro cyanidation tailings - Google Patents
The method producing regular iron-carbon micro-electrolysis filler with high ferro cyanidation tailings Download PDFInfo
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- CN106219689A CN106219689A CN201610825331.8A CN201610825331A CN106219689A CN 106219689 A CN106219689 A CN 106219689A CN 201610825331 A CN201610825331 A CN 201610825331A CN 106219689 A CN106219689 A CN 106219689A
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- high ferro
- cyanidation tailings
- carbon micro
- iron
- electrolysis filler
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
Abstract
The present invention provides a kind of method that high ferro cyanidation tailings produces regular iron-carbon micro-electrolysis filler, belongs to technical field of resource utilization.Described preparation method is prepared as carbonaceous pelletizing after high ferro cyanidation tailings, carbonaceous reducing agent, binding agent being mixed with water, and carbonaceous pelletizing carries out reduction roasting at 1100～1300 DEG C of starvations after drying, it is thus achieved that regular iron-carbon micro-electrolysis filler.This technique achieves the efficient utilization of high ferro cyanidation tailings to environmental pollutants, has the advantage that raw material sources are extensive, low cost, added value of product are high.The regular iron-carbon micro-electrolysis filler that the present invention provides is applied to Industrial Wastewater Treatment, can effectively reduce COD and the colourity of waste water, run using effect stable.
Description
Technical field
The present invention relates to technical field of resource utilization, particularly relate to one high ferro cyanidation tailings production regular iron-carbon micro-
The method of electrolysis filler.
Background technology
Cyanidation tailings is the primary solids garbage of gold smelting industry, and its complex chemical composition mainly contains ferrum, also contains
There are the valuable components such as a small amount of lead, gold, silver, sulfur, are valuable secondary resource.In recent years, China's gold industry quickly grows, gold
Yield is at the forefront in the world, and in the process of gold smelting slag and slag, the recovery of valuable metal has become the great difficulty of gold smelting industry
Topic.Cyanidation tailings be cyanidation gold-extracted after the tailings that obtains, its iron content about 30%, average higher than current China iron ore mine
Mining grade (TFe > 27%).China will produce every year 25000000 tons of cyanidation tailings, mostly use for the process of this tailings and fill out
Bury mode, cause serious environmental pollution and the wasting of resources.In recent years, around the comprehensive utilization of cyanidation tailings, disclose all
Many patents, mainly based on floatation, but cyanidation tailings is through high-temperature roasting and cyanide effect, the most solvable sulfide and
Oxide is own through the most dissolved, and mineral surfaces character there occurs great changes, causes the floatability obvious difference between mineral
Reducing, floatation processes the difficulty of cyanidation tailings and increases, and cyanidation tailings synthetical recovery effect reduces.
Micro electrolysis tech is the technique that a kind of Applied Electrochemistry principle processes waste water, and also referred to as internal electrolysis utilizes anode
Between (ferrum) and negative electrode (carbon), pollutant are processed by the potential difference of 1.2V, high toxicity, height big particular for organic concentration
Colourity, the process of difficult biochemical waste water, can significantly cut down chroma in waste water and COD, improve its biodegradability；Additionally, micro electrolysis tech
The most adsorbable, reduce various heavy metal ion, therefore, micro electrolysis tech is widely used in printing and dyeing, papermaking, chemical industry, electroplates, prints
The process of all types of industries waste water such as wiring board, pharmacy.
Conventional iron carbon micro-electrolysis filler is by iron filings and activated carbon physical mixed in proportion, constitutes ferrum carbon fixation bed, but because of
Abrasive grit (anode) and carbon granules (negative electrode) physical separation, the electric current density that light electrolysis produces is little, and water treatment effect is poor；Abrasive grit surface
Easily get rusty passivation, cause packing layer to harden, form channel, need frequent backwash packing layer or change filler, adding light electrolysis
The complexity of technique.Therefore, the development of hardening resistant micro-electrolysis filler, it appears the most necessary.In recent years, domestic iron-carbon micro-electrolysis is filled out
With market sale development quickly, product is mainly by metal iron powder, activated carbon, non-ferrous metal catalyst and binding agent in the production of material
Composition, blended, molding and sintering make, and filler has realized Regularization, overcomes filler and hardens problem.But, still suffer from as
Lower problem: filler material cost is high, product price is high, cost of water treatment rises；Filling intensity is low, and filling-material structure is loose, waste water
During process, loss is fast；Conventional ferrum carbon filler produces and uses commercial metals iron powder, and commercial metals iron powder is passivated because of surface oxidation,
Directly applying in filler, activity is low, and electric current density is little, can be improved the activity of metal iron powder by acidleach, but too increase
Production cost and environmental protection risk.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of high ferro cyanidation tailings and produces regular iron-carbon micro-electrolysis filler
Method.
The method specifically includes following steps:
(1) cyanidation tailings carbonaceous pelletizing is prepared: by high ferro cyanidation tailings, carbonaceous reducing agent, additive and binding agent by one
Add water after certainty ratio mixing pelletizing or pressure ball, is prepared as carbonaceous pelletizing；
(2) reduction roasting: step (1) gained carbonaceous pelletizing is dried, at sintering temperature 1100～1300 DEG C of isolating oxygens
Carrying out product after the roasting of reduction roasting generation containing metal iron grain (anode) and carbon granules (negative electrode) under the conditions of gas, after roasting, product exists
Cool down under the conditions of starvation, obtain regular iron-carbon micro-electrolysis filler.In roasting process, iron mineral is reduced to metallic iron and makees
For anode, carbon residue is as negative electrode, and the metal such as copper in cyanidation tailings, gold, silver as catalyst, can improve the performance of filler.Add
Add the intensity of iron-carbon micro-electrolytic material after agent can promote iron mineral reduction and improve roasting.
Wherein, in step (1), the iron content of high ferro cyanidation tailings used is more than 30%, and the relatively low cyanidation tailings of iron content leads to
Cross ore dressing means raising iron content to can also be used for producing regular iron-carbon micro-electrolysis filler after more than 30%.
Carbonaceous reducing agent in step (1) be the one in anthracite, bituminous coal, coke, activated carbon, semicoke, petroleum coke or
Multiple combination；
Additive in step (1) is the one in limestone, Calx, slaked lime, sodium carbonate, sodium sulfate, fluorite, Borax
Or multiple combination；
Binding agent in step (1) is one or more in bentonite, molasses, starch, waterglass；
In step (1) mass ratio of high ferro cyanidation tailings, carbonaceous reducing agent, additive and binding agent be 100:(30～
60): (0～20): (0.5～10).
In step (2), reduction roasting is carried out under the conditions of starvation.
Having the beneficial effect that of the technique scheme of the present invention:
In such scheme, directly produced regular iron-carbon micro-electrolysis filler by high ferro cyanidation tailings, there are raw material sources wide
General, flow process is short and eco-friendly feature, gained iron-carbon micro-electrolytic material be applied to process industrial wastewater, can effectively reduce waste water
COD and colourity, run using effect stable.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the high ferro cyanidation tailings production regular iron-carbon micro-electrolysis filler of the present invention.
Detailed description of the invention
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
The present invention provides a kind of method that high ferro cyanidation tailings produces regular iron-carbon micro-electrolysis filler, technological process such as figure
Shown in 1, the step such as including dispensing, pelletizing, drying, reduction roasting, cooling, it is explained below in conjunction with specific embodiment.
Embodiment 1
The multielement analysis of certain high ferro cyanidation tailings is shown in Table 1, and carbonaceous reducing agent used is anthracite, coal analysis such as table 2
Shown in.
The multielement analysis of table 1 high ferro cyanidation tailings
| Composition | TFe | Al2O3 | SiO2 | MgO | CaO |
| Content (%) | 40.23 | 17.50 | 9.64 | 0.32 | 0.43 |
| Composition | Au | Ag | Cu | P | S |
| Content (%) | 0.99g/t | 20.12g/t | 0.45 | 0.073 | 1.21 |
The Industrial Analysis result (air-dried basis) of table 2 coal
| Composition | Moisture | Ash | Fixed carbon | Volatile matter | Full sulfur |
| Content (%) | 2.28 | 8.35 | 83.23 | 6.14 | 0.50 |
High ferro cyanidation tailings: anthracite: bentonite: limestone 100:50:5:10 in mass ratio weighs mixing, then adds
The water mixing of 12%.Mixed material is being prepared as carbonaceous pelletizing on roller ball press, by carbonaceous pelletizing 105 DEG C of drying.Will
Carbonaceous pelletizing is put in atmosphere furnace, and inflated with nitrogen protection is warming up to 1180 DEG C, is then incubated 3h, and roasting is protected at nitrogen with stove after terminating
Protect lower cooling, obtain regular iron-carbon micro-electrolysis filler.
The application regular iron-carbon micro-electrolysis filler prepared of the present embodiment process certain silk dye transfer waste water (colourity about 800 times,
COD is about 1400mg/L, pH:5.3～5.5), pH is adjusted to about 3, under conditions of hydraulic detention time is 8h, waste water color
Degree clearance is 85%, COD removal efficiency 47%；Reactor runs 1 month continuously, and do not find significantly to harden phenomenon, runs
Relatively stable.
Embodiment 2
The multielement analysis of certain high ferro cyanidation tailings is shown in Table 3, and carbonaceous reducing agent used is anthracite, coal analysis such as table 2
Shown in.
The multielement analysis of table 3 high ferro cyanidation tailings
| Composition | TFe | Al2O3 | SiO2 | MgO | CaO |
| Content (%) | 40.23 | 12.43 | 14.45 | 0.89 | 0.76 |
| Composition | Au | Ag | Cu | P | S |
| Content (%) | 1.02g/t | 30.42g/t | 0.38 | 0.065 | 1.35 |
High ferro cyanidation tailings: carbonaceous reducing agent: binding agent: additive 100:40:8:8 in mass ratio weighs mixing, then
The water mixing adding 12%.Carbonaceous reducing agent consist of anthracite: bituminous coal: coke: activated carbon: semicoke: the mass ratio of petroleum coke
For 30:20:20:10:10:10, anthracite, bituminous coal, coke, activated carbon, semicoke, petroleum coke are industrial products；Binding agent group
Become waterglass: bentonite: starch: molasses mass ratio is 30:30:10:30, and waterglass, bentonite, starch, molasses are equal
For industrial products；Additive consists of limestone: Calx: slaked lime: sodium carbonate: sodium sulfate: fluorite: Borax mass ratio is 20:
20:10:15:10:15:10, limestone, Calx, slaked lime, fluorite, sodium carbonate, sodium sulfate, Borax are industrial products.Will be mixed
Compound material is being prepared as carbonaceous pelletizing on roller ball press, by carbonaceous pelletizing 105 DEG C of drying.Carbonaceous pelletizing is put into atmosphere furnace
In, inflated with nitrogen protection is warming up to 1280 DEG C, is then incubated 2h, and roasting cools down under nitrogen protection with stove after terminating, the rule obtained
Integralization iron-carbon micro-electrolysis filler.
Regular iron-carbon micro-electrolysis filler prepared by application the present embodiment processes certain industry coking chemical waste water, and its COD is
14000mg/L, colourity is about 11500 times.Wastewater pH is adjusted to about 3, and under conditions of hydraulic detention time is 6h, COD goes
Except rate is 51%, chroma removal rate is 80%.Running 6 weeks continuously, run treatment effect stable, do not find substantially to harden phenomenon.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of without departing from principle of the present invention, it is also possible to make some improvements and modifications, these improvements and modifications are also
Should be regarded as protection scope of the present invention.
Claims (7)
1. the method producing regular iron-carbon micro-electrolysis filler with high ferro cyanidation tailings, it is characterised in that: include walking as follows
Rapid:
(1) cyanidation tailings carbonaceous pelletizing is prepared: by high ferro cyanidation tailings, carbonaceous reducing agent, additive and binding agent by a definite proportion
Add water after example mixing pelletizing or pressure ball, is prepared as carbonaceous pelletizing；
(2) reduction roasting: step (1) gained carbonaceous pelletizing is dried, reduction roasting at sintering temperature 1100～1300 DEG C
Generating product after the roasting of containing metal iron grain and carbon granules, after roasting, product cools down under the conditions of starvation, obtains regular iron
Carbon micro-electrolysis filler.
High ferro cyanidation tailings the most according to claim 1 produces the method for regular iron-carbon micro-electrolysis filler, its feature
It is: the iron content of high ferro cyanidation tailings used is more than 30%.
High ferro cyanidation tailings the most according to claim 1 produces the method for regular iron-carbon micro-electrolysis filler, its feature
It is: carbonaceous reducing agent used is the one in anthracite, bituminous coal, graphite, activated carbon, coke, semicoke, petroleum coke, biological Jiao
Or multiple combination.
High ferro cyanidation tailings the most according to claim 1 produces the method for regular iron-carbon micro-electrolysis filler, its feature
It is: additive used is one or more groups in limestone, Calx, slaked lime, sodium carbonate, sodium sulfate, fluorite, Borax
Close.
High ferro cyanidation tailings the most according to claim 1 produces the method for regular iron-carbon micro-electrolysis filler, its feature
It is: binding agent used is one or more combinations in bentonite, molasses, starch.
High ferro cyanidation tailings the most according to claim 1 produces the method for regular iron-carbon micro-electrolysis filler, its feature
Be: the mass ratio of high ferro cyanidation tailings used, carbonaceous reducing agent, additive and binding agent is 100:(30～60): (0～
20): (0.5～10).
High ferro cyanidation tailings the most according to claim 1 produces the method for regular iron-carbon micro-electrolysis filler, its feature
Being: reduction roasting is carried out under the conditions of starvation, after roasting, product cools down under the conditions of starvation.
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Cited By (5)
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|---|---|---|---|---|
| CN107012316A (en) * | 2017-04-07 | 2017-08-04 | 江西理工大学 | The method that many first micro-electrolysis stuffings of Regularization Fe Ni C are produced with lateritic nickel ore |
| CN107460336A (en) * | 2017-08-10 | 2017-12-12 | 李家元 | A kind of processing method of golden cyanide residue |
| CN110498469A (en) * | 2019-08-15 | 2019-11-26 | 北京京华清源环保科技有限公司 | A kind of materialization-biochemistry coupling water purification material and preparation method thereof |
| CN111100989A (en) * | 2019-12-13 | 2020-05-05 | 潘爱芳 | Method for activating metal tailings |
| CN113104939A (en) * | 2021-04-15 | 2021-07-13 | 北京科技大学 | Method for preparing micro-electrolysis active coke filler by using metallurgical dust and mud |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107012316A (en) * | 2017-04-07 | 2017-08-04 | 江西理工大学 | The method that many first micro-electrolysis stuffings of Regularization Fe Ni C are produced with lateritic nickel ore |
| CN107460336A (en) * | 2017-08-10 | 2017-12-12 | 李家元 | A kind of processing method of golden cyanide residue |
| CN110498469A (en) * | 2019-08-15 | 2019-11-26 | 北京京华清源环保科技有限公司 | A kind of materialization-biochemistry coupling water purification material and preparation method thereof |
| CN111100989A (en) * | 2019-12-13 | 2020-05-05 | 潘爱芳 | Method for activating metal tailings |
| CN113104939A (en) * | 2021-04-15 | 2021-07-13 | 北京科技大学 | Method for preparing micro-electrolysis active coke filler by using metallurgical dust and mud |
| CN113104939B (en) * | 2021-04-15 | 2022-07-05 | 北京科技大学 | Method for preparing micro-electrolysis active coke filler by using metallurgical dust and mud |
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Application publication date: 20161214 |