CN105837162A - Method for preparation of kaolin from coal slime flotation tailings - Google Patents
Method for preparation of kaolin from coal slime flotation tailings Download PDFInfo
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- CN105837162A CN105837162A CN201610165509.0A CN201610165509A CN105837162A CN 105837162 A CN105837162 A CN 105837162A CN 201610165509 A CN201610165509 A CN 201610165509A CN 105837162 A CN105837162 A CN 105837162A
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- China
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- mine tailing
- coal slime
- tailings
- kaolin
- slime flotation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/10—Eliminating iron or lime
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Dispersion Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for preparation of kaolin from coal slime flotation tailings. The method consists of: mixing coal slime flotation tailings with bauxite flotation tailings to obtain mixed tailings with an aluminum-to-silicon ratio meeting the requirements of kaolin; subjecting the mixed tailings to magnetizing roasting, conducting magnetic separation on the roasting tailings to recover magnetite, thus obtaining the tailings as the kaolin product. The method provided by the invention collocates coal slime flotation tailings with bauxite flotation tailings to use, makes full use of the components in various tailings themselves, acquires an iron product and a kaolin product through a simple and low-cost process, realizes comprehensive utilization of resources, and meets the existing industrial development requirements.
Description
Technical field
The present invention relates to one utilizes coal slime flotation mine tailing to prepare kaolinic method, belongs at coal slime flotation mine tailing
Reason technical field.
Background technology
Floatation processes coal slime typically can produce the flotation tail mud that productivity is more than 50%, along with coal slime flotation method is returned
Receiving application and the popularization of cleaned coal technology, a large amount of coal slime flotation mine tailings produce therewith, and coal slime flotation mine tailing is currently mainly
Use the method stored up to process, do not only take up a large amount of land resource, environment is caused certain impact, and mine tailing
Dam there is also certain potential safety hazard.
Coal slime flotation mine tailing be mainly composed of aluminium oxide and silicon dioxide, in addition with part residual fixed carbon and
The impurity such as the oxide of a small amount of ferrum and sulfide.Certain typical case's coal slime flotation mine tailing Contents of Main Components is that aluminium oxide accounts for
25.6%, silicon dioxide accounts for 45.4%, and iron content is 4.57%, and carbon element content is 5.65%.Coal slime is floated
Select tailing heap storage big, and chemical composition, mineral composition and granularity are consistent substantially with kaolinic character, therefore
Carry out the good side that the application in the Kaolin field having a large capacity and a wide range of the coal slime flotation mine tailing is recycling
To.
But Fe and fixed carbon content are all beyond the requirement (< 1.5%) of kaolin product in coal slime flotation mine tailing,
And alumina silica ratio is too small, so except ferrum, de-carbon, raising alumina silica ratio become it and utilize in porcelain mud material industry resourceization
Key problem in technology.Additionally, iron resource is the valuable source the most in short supply in China's current development, its resource
Synthetical recovery is also significant.
Generation is also accounted for the flotation tail of raw ore 20% by bauxite after using " ore dressing～alumina producing Bayer process "
Ore deposit, this mine tailing, the most also without preferable recycling approach, also mainly uses the method stored up to process.Certain
Consisting of of typical case's bauxite gangue: aluminium oxide accounts for 44%, and silicon dioxide accounts for 27.7%, and ferrum oxide accounts for 10.1%.
From in standard JC88-82, the prevailing quality standard of kaolin products at different levels is: alumina content is not less than
37%, silicon dioxide is not more than 48%, and iron oxide content is not more than 1.5%.Therefore, coal slime flotation mine tailing and
Alumyte flotation tailings all can not meet the ingredient standard of kaolin product.
Coal slime flotation mine tailing is bloodstone and pyrite with iron-bearing mineral dominant in alumyte flotation tailings mutually, red
Iron mine adjoins relatively regularly with diaspore and illite to be inlayed, in fine pulse-like or parcel squamous layer circle, this
The irony inlayed is dissociated difficulty, therefore uses the iron mineral in magnetic separation removing mine tailing extremely difficult.Mineral acid is to coal
In mud flotation tailing, the removal efficiency of iron mineral is higher, but has that cost is high, ferrum recovery difficult big and environmental pollution etc.
Problem, it is difficult to realize industrialization, and to matter carba in mine tailing without removing effect.
Summary of the invention
It is difficult to be utilized for the industrial residue such as coal slime flotation mine tailing and alumyte flotation tailings in prior art, and
Cause the defect that treatment cost is high, environmental pollution is big.It is an object of the invention to be for a kind of with coal slime flotation tail
Ore deposit and alumyte flotation tailings collocation use, and make full use of self component of various mine tailing, by one-tenth simple, low
This PROCESS FOR TREATMENT obtains iron product and the method for kaolin product, and the method is truly realized comprehensive resource profit
With, meet existing industrial development requirement.
The invention provides one utilizes coal slime flotation mine tailing to prepare kaolinic method, and the method is coal slime to be floated
Select mine tailing to mix with alumyte flotation tailings, obtain alumina silica ratio and meet the mixing mine tailing of Kaolin requirement；Described mixed
After conjunction mine tailing carries out magnetizing roast, roasting mine tailing separates and recovers magnetic iron ore by magnetic separation, and mine tailing is kaolinite local products
Product.
Preferably scheme, magnetizing roast temperature is 800～1000 DEG C.
More preferably scheme, at a temperature of 800～1000 DEG C, the time of magnetizing roast is 3～30min.
Preferably scheme, magnetic separation separates and uses low-intensity magnetic field to separate, and magnetic induction is 0.03～0.1 tesla.
The coal slime flotation mine tailing of the present invention floats with the coal slime of the mass ratio relation of alumyte flotation tailings with selection
Select mine tailing relevant with alumyte flotation tailings kind, major requirement coal slime flotation mine tailing and the bauxite flotation of employing
The alumina silica ratio relation of mine tailing mixing mine tailing meets Kaolin alumina silica ratio requirement, can realize kaolinic preparation.High
The alumina silica ratio of ridge soil requires to meet GB/T 14563-2008.
The know-why of the present invention: due to iron content and carbon content is too high and sial to be based primarily upon coal slime flotation mine tailing
Than being unsatisfactory for kaolin component requirement, and iron content in alumyte flotation tailings is too high is also unsatisfactory for kaolinite local soil type
Divide requirement；The dominant of the ferrum in both mine tailings is bloodstone and pyrite mutually simultaneously, it is difficult to by routine
Magnetic separation separating technology removes.Technical scheme is dexterously by coal slime flotation mine tailing and the alum clay of proper proportion
Ore deposit flotation tailing collocation integrated treatment, by magnetizing roast, makes full use of the charcoal in coal slime flotation mine tailing as also
Former dose, the ferrum in two kinds of mine tailings is reduced into the magnetization iron mine Fe that can separate with magnetic separation3O4, magnetizing roast is simultaneously
Achieving de-charcoal and the magnetization of ferrum of mine tailing, recycling magnetic separation separates, it is achieved that deferrization, reclaim iron product and
Kaolin product.Dominant response is as follows: 3Fe2O3+C→2Fe3O4+ CO, 3Fe2O3+CO→2Fe3O4+CO2。
Hinge structure, the Advantageous Effects that technical scheme is brought:
(1), technical scheme passes through two kinds of industrial residues, it is thus achieved that the Fe that economic value added is higher3O4
Product and kaolin product, the synthesization being truly realized resource utilizes.
(2), technical solution of the present invention make full use of the carbon feedstock in mine tailing and carry out magnetizing roast, both realized mine tailing
De-charcoal, again as reducing agent, greatly reduces the use of reducing agent, reduces production cost.
(3), technical solution of the present invention technique is simple, flow process is short, by magnetizing roast and low intensity magnetic separation method, and can one
Iron tramp in secondary property removing mine tailing and charcoal impurity.
Detailed description of the invention
Following example are intended to present invention is described rather than the claims in the present invention protection domain is entered one
Step limits.
Embodiment 1
Certain typical case coal slime flotation mine tailing mainly comprise for: aluminium oxide accounts for 25.6%, and silicon dioxide accounts for 45.4%, ferrum
Constituent content is 4.57%, and carbon element content is 5.65%；
Consisting of of certain typical case's bauxite gangue: aluminium oxide accounts for 44%, and silicon dioxide accounts for 27.7%, and ferrum oxide accounts for
10.1%.
The step utilizing this coal slime flotation mine tailing to prepare kaolin product is:
(1) this coal slime flotation mine tailing is uniformly mixed for 1:2 in mass ratio with bauxite gangue, aoxidized
Aluminum accounts for 37.9%, silicon dioxide account for 33.6% mixing mine tailing；
(2) gained mixing mine tailing is carried out magnetizing roast 15min at 800 DEG C, utilize the carba matter in mine tailing
As reducing agent, bloodstone is converted into magnetic iron ore (3Fe2O3+C→2Fe3O4+ CO, 3Fe2O3+CO→
2Fe3O4+CO2)；
(3) the mixing mine tailing after magnetizing roast being carried out low intensity magnetic separation, magnetic induction is 0.05T, isolates
Magnetic iron ore, obtains kaolin product, in this product alumina content be 37.9%, dioxide-containing silica be 33.6%,
Iron oxide content is 1.18%, and above-mentioned three kinds of parameters have reached the mark of M2 kaolin product in standard JC88-82
Accurate.
Embodiment 2
Springs in Kaili, Guizhou coal preparation plant coal slime flotation mine tailing mainly comprise for: aluminium oxide accounts for 28.3%, titanium dioxide
Silicon accounts for 44.3%, and iron content is 5.6%, and carbon element content is 9.8%；It closes on bauxite factory of county tail
Consisting of of ore deposit: aluminium oxide accounts for 45.2%, silicon dioxide accounts for 26.4%, and ferrum oxide accounts for 11.2%.
The step utilizing this coal slime flotation mine tailing and bauxite gangue to prepare kaolin product is:
(1) this coal slime flotation mine tailing is uniformly mixed for 1:4 in mass ratio with bauxite gangue, aoxidized
Aluminum accounts for 41.82%, silicon dioxide account for 29.98% mixing mine tailing；
(2) gained mixing mine tailing is carried out magnetizing roast 25min at 950 DEG C, utilize the carba matter in mine tailing
As reducing agent, bloodstone is converted into magnetic iron ore.
(3) the mixing mine tailing after magnetizing roast being carried out low intensity magnetic separation, magnetic induction is 0.85T, isolates
Magnetic iron ore, obtains kaolin product, in this product alumina content be 41.82%, dioxide-containing silica be
29.98%, iron oxide content is 0.76%, and above-mentioned three kinds of parameters have reached ceramic industry Kaolin TC-1 level
The quality standard of product.
Claims (4)
1. one kind utilizes coal slime flotation mine tailing to prepare kaolinic method, it is characterised in that: by coal slime flotation mine tailing with
Alumyte flotation tailings mixes, and obtains alumina silica ratio and meets the mixing mine tailing of Kaolin requirement；Described mixing mine tailing enters
After row magnetizing roast, roasting mine tailing separates and recovers magnetic iron ore by magnetic separation, and mine tailing is kaolin product.
The most according to claim 1 coal slime flotation mine tailing is utilized to prepare kaolinic method, it is characterised in that:
Described magnetizing roast temperature is 800～1000 DEG C.
The most according to claim 2 coal slime flotation mine tailing is utilized to prepare kaolinic method, it is characterised in that:
The magnetizing roast time is 3～30min.
The most according to claim 1 coal slime flotation mine tailing is utilized to prepare kaolinic method, it is characterised in that:
Described magnetic separation separates and uses low-intensity magnetic field to separate, and magnetic induction is 0.03～0.1 tesla.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610165509.0A CN105837162A (en) | 2016-03-22 | 2016-03-22 | Method for preparation of kaolin from coal slime flotation tailings |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610165509.0A CN105837162A (en) | 2016-03-22 | 2016-03-22 | Method for preparation of kaolin from coal slime flotation tailings |
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| CN105837162A true CN105837162A (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610165509.0A Pending CN105837162A (en) | 2016-03-22 | 2016-03-22 | Method for preparation of kaolin from coal slime flotation tailings |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111172383A (en) * | 2020-02-19 | 2020-05-19 | 武翠莲 | Method for producing aluminum-silicon-iron-titanium alloy by comprehensively utilizing coal slime and industrial wastes |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1806930A (en) * | 2006-01-25 | 2006-07-26 | 中国长城铝业公司 | Aluminium-iron separating and comprehensive utilizing method for high iron bauxite |
| CN101126125A (en) * | 2007-07-12 | 2008-02-20 | 中国铝业股份有限公司 | Comprehensive utilization method for bauxite dressing tailings |
| CN101767057A (en) * | 2008-12-30 | 2010-07-07 | 中国地质科学院郑州矿产综合利用研究所 | Method for separating aluminum and iron in high-iron bauxite |
| CN103373844A (en) * | 2012-04-24 | 2013-10-30 | 黄崧基 | Method for comprehensive utilization of resources in exploitation of weathered granite mine |
-
2016
- 2016-03-22 CN CN201610165509.0A patent/CN105837162A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1806930A (en) * | 2006-01-25 | 2006-07-26 | 中国长城铝业公司 | Aluminium-iron separating and comprehensive utilizing method for high iron bauxite |
| CN101126125A (en) * | 2007-07-12 | 2008-02-20 | 中国铝业股份有限公司 | Comprehensive utilization method for bauxite dressing tailings |
| CN101767057A (en) * | 2008-12-30 | 2010-07-07 | 中国地质科学院郑州矿产综合利用研究所 | Method for separating aluminum and iron in high-iron bauxite |
| CN103373844A (en) * | 2012-04-24 | 2013-10-30 | 黄崧基 | Method for comprehensive utilization of resources in exploitation of weathered granite mine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111172383A (en) * | 2020-02-19 | 2020-05-19 | 武翠莲 | Method for producing aluminum-silicon-iron-titanium alloy by comprehensively utilizing coal slime and industrial wastes |
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Application publication date: 20160810 |