CN102060303A - Method for preparing artificial mullite raw material by bauxite - Google Patents
Method for preparing artificial mullite raw material by bauxite Download PDFInfo
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- CN102060303A CN102060303A CN 201010572082 CN201010572082A CN102060303A CN 102060303 A CN102060303 A CN 102060303A CN 201010572082 CN201010572082 CN 201010572082 CN 201010572082 A CN201010572082 A CN 201010572082A CN 102060303 A CN102060303 A CN 102060303A
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- flotation
- bauxite
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- mullite
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Abstract
The invention relates to a method for preparing an artificial mullite raw material by bauxite. The method is characterized by comprising the following preparation processes of: after coarsely grinding bauxite raw ore, reacting the coarsely ground bauxite raw ore with a bauxite direct floatation agent for performing aluminum-silica floatation separation to obtain flotation froth in a high aluminum-silica ratio and floatation bottom flow in the low aluminum-silica ratio of 2.5 to 2.60; performing high-intensity magnetic separation on the floatation bottom flow for removing iron to obtain iron-rich magnetic products and non-magnetic products; and after regrinding the non-magnetic products, reacting the reground non-magnetic products with a titanium-removing floatation agent for removing titanium-containing minerals to obtain titanium-rich flotation forth and the floatation bottom flow, wherein the floatation bottom flow is a qualified raw material for synthesizing mullite. By using the method, desiliconized low-aluminum tailings of the bauxite can be utilized synthetically; and the low-aluminum tailings are processed into the qualified raw material for synthesizing the mullite. On one hand, the tailings in ore dressing of the bauxite are digested; on the other hand, the cost of the mullite raw material is reduced.
Description
Technical field
A kind of bauxite prepares the method for artificial mullite raw material, and relating to a kind of employing bauxite is raw material, prepares by ore dressing that the alumina silica ratio that is used for mullite synthesizing is 2.55, TiO
2Content less than 2.0%, Fe
2O
3Content is less than the method for the artificial mullite raw material of 1.5% bauxite.
Background technology
Mullite is an aluminium silicate mineral, also claims mullite, and chemical constitution is 3Al
2O
3SiO
2Has the refractoriness height, heat-shock resistance, chemical resistance of concrete, creep-resistant property are good, the refractoriness under load height, volume stability is good, and electrical insulating property is strong, premium propertiess such as shearing modulus height, be the ideal high grade refractory, be widely used in industry such as metallurgy, glass, pottery, chemistry, electric power, national defence, combustion gas and cement, be subjected to the favor of refractories industry.But natural mullite is very rare, is raw material with silicon-containing material and aluminium-containing substance, and synthetic high-quality mullite becomes the main source of mullite.
The used initial mixing raw material of aluminium, silicon of mullite synthesizing is divided into following several: solid mixture, collosol intermixture, silicic acid-aluminium salt mixture, alkoxide mixt.The initial mixing material that the industrial production fused mullite adopts all is a solid mixture, raw materials used bauxitic clay, coal clay and the commercial alumina etc. of being generally.The combination of introducing in the document mainly contains; Coal gangue and aluminium hydroxide, coal gangue and α-Al
2O
3, high-purity Coaseries kaolin and commercial alumina, alumina muck and coal gangue, aluminum oxide and quartz etc.
In the patent about the mullite synthesizing method, the materials variance of employing is bigger, and the technical patent of having authorized has: the synthetic method of a. mullite material, and publication number CN1609040A, this invention raw material is waste aluminum sludge and ferroalloy plant silica fume.B. method of utilizing aluminous fly-ash sintering mullite synthesizing, publication number CN1696075A, this inventive method is to be raw material with power plant's waste aluminous fly-ash, adds a small amount of alumine and carries out batch mixes, as the raw material of mullite synthesizing.C. the manufacture method of electrofused mullite, publication number CN1974475A, it is main raw material that wasted aluminium ash is adopted in this invention, is equipped with bauxitic clay and silica and produces the electrofused mullite material.D. the complete processing of a high-purity mullite, publication number CN101314547A, this is invented with γ-Al
2O
3With kaolin be raw material processing mullite.
The mullite synthesizing raw material that above-mentioned patent and document are introduced all is by containing aluminium and siliceous two kinds of materials mix according to a certain percentage, and raw material sources are very limited, mullite raw materials cost height.
Summary of the invention
Purpose of the present invention is exactly the deficiency that exists at above-mentioned prior art, provides a kind of and can effectively expand raw material sources, improves the utilization ratio of bauxite resource, and the bauxite that reduces the mullite raw materials cost prepares the method for artificial mullite raw material.
The objective of the invention is to be achieved through the following technical solutions.
A kind of bauxite prepares the method for artificial mullite raw material, it is characterized in that the step of preparation process comprises:
(1) the bauxite raw ore is roughly ground;
(2) aluminium silicon flotation separation is carried out in the ore grinding product and the effect of bauxite forward flotation medicament of step (1), obtain the flotation froth of high aluminium silicon ratio and low alumina silica ratio and be 2.50 ~ 2.60 flotation underflow;
(3) the flotation underflow with step (2) carries out the high intensity magnetic separation deferrization, obtains magnetic product and the non magnetic product of Fu Tie;
(4) the non magnetic product of step (3) is regrinded;
(5) with the ore grinding product of step (4) with take off the effect of titanium flotation reagent, carry out removing of titaniferous ore, obtain the flotation froth and the flotation underflow of rich titanium, this flotation underflow is the acceptable material of mullite synthesizing.
A kind of bauxite of the present invention prepares the method for artificial mullite raw material, it is characterized in that described step (1) with bauxite raw ore corase grind process, its grinding fineness accounts for 55%-75% for-0.074mm grade.
A kind of bauxite of the present invention prepares the method for artificial mullite raw material, it is characterized in that the aluminium silicon flotation separation operation of described step (2) is the direct flotation one roughing.
A kind of bauxite of the present invention prepares the method for artificial mullite raw material, it is characterized in that the magnetic concentration working of described step (3), and the field strength scope is 800kA/m-1600kA/m.
A kind of bauxite of the present invention prepares the method for artificial mullite raw material, and the grinding fineness that it is characterized in that described step (4) accounts for more than 90% for-0.028mm grade.
A kind of bauxite of the present invention prepares the method for artificial mullite raw material, what it is characterized in that described step (5) takes off the titanium flotation operation, adopt a small amount of dosing method repeatedly, promptly each flotation reagent that adds less consumption, repeatedly roughly select, roughly selecting number of times is 4-6 time.
A kind of bauxite of the present invention prepares the method for artificial mullite raw material, and it is characterized in that the interpolation medicament of described step (2) aluminium silicon flotation separation is: yellow soda ash 6kg/t raw ore, sodium oleate 300g/t raw ore-400g/t raw ore, flotation time are 4 minutes.
A kind of bauxite of the present invention prepares the method for artificial mullite raw material, it is characterized in that described step (5) takes off the medicament total amount that the titanium flotation adds and be: sulfuric acid 2kg/t raw ore, Sodium Silicofluoride 1.6kg/t raw ore-2kg/t raw ore, lead nitrate 800g/t raw ore-1000g/t raw ore, styryl phosphonic acid 1100g/t raw ore-1300g/t raw ore, wherein Sodium Silicofluoride, lead nitrate and styryl phosphonic acid add several times.
Method of the present invention is specially adapted to the low aluminium mine tailing behind middle-low bauxite raw ore or the bauxite desilication, adopts beneficiation method to obtain to produce the raw material of mullite-type refractory materials.Bauxite raw ore composition is generally: Al
2O
3Grade is 60% ~ 70%, SiO
2Content is 5% ~ 15%, TiO
2Content is 2% ~ 4%, Fe
2O
3Content is 2.5% ~ 5.5%.
Compared with prior art, the inventive method can fully utilize the low aluminium mine tailing of bauxite desilication, low aluminium mine tailing is processed as the raw material of qualified mullite synthesizing.On the one hand, digest the mine tailing of ore concentration of bauxite, on the other hand, reduced the cost of mullite raw material.
Description of drawings
Fig. 1 is the process flow sheet of the inventive method.
Embodiment
A kind of bauxite prepares the method for artificial mullite raw material, and it is characterized in that the step of its ore dressing process comprises: (1) roughly grinds the bauxite raw ore; (2) aluminium silicon flotation separation is carried out in the ore grinding product and the effect of bauxite forward flotation medicament of step (1), obtain the flotation froth of high aluminium silicon ratio and alumina silica ratio and be 2.50 ~ 2.60 flotation underflow; (3) the flotation underflow with step (2) carries out the high intensity magnetic separation deferrization, obtains magnetic product (rich iron product) and non magnetic product; (4) the non magnetic product of step (3) is regrinded; (5) with the ore grinding product of step (4) with take off the effect of titanium flotation reagent, carry out removing of titaniferous ore, obtain the flotation froth and the flotation underflow of rich titanium, this flotation underflow is the acceptable material of mullite synthesizing.
During operation, with one section corase grind of bauxite raw ore (grinding fineness for-0.074mm grade account for 55% ~ 75%), aluminium silicon flotation separation is carried out in ore grinding product and the effect of bauxite forward flotation medicament, and it is 2.50 ~ 2.60 flotation underflow that one roughing obtains the flotation froth of high aluminium silicon ratio and alumina silica ratio; The flotation underflow carries out the high intensity magnetic separation deferrization, and the magneticstrength scope is 800kA/m-1600kA/m, obtains magnetic product and non magnetic product; Non magnetic product carries out secondary grinding (grinding fineness for-0.028mm grade account for more than 90%), the ore grinding product with take off the effect of titanium flotation reagent and carry out flotation and take off titanium, roughly select and obtain titaniferous flotation froth and take off titanium flotation underflow for 4 ~ 6 times, this underflow is the acceptable material of mullite synthesizing.
Embodiment 1
Bauxite raw ore Al
2O
364.09%, SiO
213.22%, TiO
22.89%, Fe
2O
32.46%.Its ore dressing process comprises: with one section corase grind of raw ore (grinding fineness-0.074mm grade accounts for 55%), adding the water management pulp density is 35%; Corase grind product aluminium silicon flotation separation, the regime of agent of employing is: adjust agent yellow soda ash 6kg/t raw ore, sodium oleate 350g/t raw ore, one roughing 4 minutes, flotation froth are the high aluminium silicon ratio product, the further magnetic separation deferrization of ore pulp in the groove; The magneticstrength of ore pulp magnetic separation is 800kA/m in the groove, and the magnetic product is an iron-containing tailing, non magnetic product regrinding and reconcentration; The product (grinding fineness-0.028mm grade accounts for 91%) of regrinding further flotation takes off titanium; Take off the titanium roughing flotation 1 time, scan 4 times, each 4 minutes, the regime of agent of one roughing is: sulfuric acid 2kg/t raw ore, Sodium Silicofluoride 1kg/t raw ore, lead nitrate 500g/t raw ore, styryl phosphonic acid 800g/t raw ore, the regime of agent that scan for four times the back is a Sodium Silicofluoride 200g/t raw ore, lead nitrate 100g/t raw ore, styryl phosphonic acid 100g/t raw ore, flotation froth is merged into and is contained titanium products, and product is the raw material of mullite synthesizing in the groove.The ore dressing of the raw material of mullite synthesizing the results are shown in table 1.
Table 1
Embodiment 2
Bauxite raw ore Al
2O
363.64%, SiO
213.21%, TiO
22.88%, Fe
2O
32.27%.Its preparation process comprises: with one section corase grind of raw ore (grinding fineness-0.074mm grade accounts for 65%), adding the water management pulp density is 35%; Corase grind product aluminium silicon flotation separation, the regime of agent of employing is: adjust agent yellow soda ash 6kg/t raw ore, sodium oleate 400g/t raw ore, one roughing 4 minutes, flotation froth are the high aluminium silicon ratio product, the further magnetic separation deferrization of ore pulp in the groove; The magneticstrength of ore pulp magnetic separation is 1600kA/m in the groove, and the magnetic product is an iron-containing tailing, non magnetic product regrinding and reconcentration; The product (grinding fineness-0.028mm grade accounts for 95%) of regrinding further flotation takes off titanium; Take off the titanium roughing flotation 1 time, scan 5 times, each 4 minutes, the regime of agent of one roughing is: sulfuric acid 2kg/t raw ore, Sodium Silicofluoride 1kg/ raw ore, lead nitrate 500g/t raw ore, styryl phosphonic acid 800g/t raw ore, the regime of agent that scan for five times the back is Sodium Silicofluoride 200 g/t raw ores, lead nitrate 100g/t raw ore, styryl phosphonic acid 100g/t raw ore, flotation froth is merged into and is contained titanium products, and product is the raw material of mullite synthesizing in the groove.The feedstock production of mullite synthesizing the results are shown in table 2.
Table 2
Embodiment 3
Bauxite raw ore Al
2O
362.72%, SiO
213.11%, TiO
23.08%, Fe
2O
32.14%.Its preparation process comprises: with one section corase grind of raw ore (grinding fineness-0.074mm grade accounts for 75%), adding the water management pulp density is 35%; Corase grind product aluminium silicon flotation separation, the regime of agent of employing is: adjust agent yellow soda ash 6kg/t raw ore, sodium oleate 300g/t raw ore, one roughing 4 minutes, flotation froth are the high aluminium silicon ratio product, the further magnetic separation deferrization of ore pulp in the groove; The magneticstrength of ore pulp magnetic separation is 1200kA/m in the groove, and the magnetic product is an iron-containing tailing, non magnetic product regrinding and reconcentration; The product (grinding fineness-0.028mm grade accounts for 98%) of regrinding further flotation takes off titanium; Take off the titanium roughing flotation 1 time, scan 3 times, each 4 minutes, the regime of agent of one roughing is: sulfuric acid 2kg/t raw ore, Sodium Silicofluoride 1kg/ raw ore, lead nitrate 500g/t raw ore, styryl phosphonic acid 800g/t raw ore, the regime of agent that scan for three times the back is a Sodium Silicofluoride 200g/ raw ore, lead nitrate 100g/t raw ore, styryl phosphonic acid 100g/t raw ore, flotation froth is merged into and is contained titanium products, and product is the raw material of mullite synthesizing in the groove.The feedstock production of mullite synthesizing the results are shown in table 3.
Table 3
Claims (8)
1. a bauxite prepares the method for artificial mullite raw material, it is characterized in that the step of preparation process comprises:
(1) the bauxite raw ore is roughly ground;
(2) aluminium silicon flotation separation is carried out in the ore grinding product and the effect of bauxite forward flotation medicament of step (1), obtain the flotation froth of high aluminium silicon ratio and the flotation underflow that low alumina silica ratio is 2.50-2.60;
(3) the flotation underflow with step (2) carries out the high intensity magnetic separation deferrization, obtains magnetic product and the non magnetic product of Fu Tie;
(4) the non magnetic product of step (3) is regrinded;
(5) with the ore grinding product of step (4) with take off the effect of titanium flotation reagent, carry out removing of titaniferous ore, obtain the flotation froth and the flotation underflow of rich titanium, this flotation underflow is the acceptable material of mullite synthesizing.
2. a kind of bauxite according to claim 1 prepares the method for artificial mullite raw material, it is characterized in that described step (1) with bauxite raw ore corase grind process, its grinding fineness accounts for 55%-75% for-0.074mm grade.
3. a kind of bauxite according to claim 1 prepares the method for artificial mullite raw material, it is characterized in that the aluminium silicon flotation separation operation of described step (2) is the direct flotation one roughing.
4. a kind of bauxite according to claim 1 prepares the method for artificial mullite raw material, it is characterized in that the magnetic concentration working of described step (3), and the field strength scope is 800kA/m-1600kA/m.
5. a kind of bauxite according to claim 1 prepares the method for artificial mullite raw material, and the grinding fineness that it is characterized in that described step (4) accounts for more than 90% for-0.028mm grade.
6. a kind of bauxite according to claim 1 prepares the method for artificial mullite raw material, what it is characterized in that described step (5) takes off the titanium flotation operation, adopt a small amount of dosing method repeatedly, promptly each flotation reagent that adds less consumption, repeatedly scan, scanning number of times is 3-5 time.
7. a kind of bauxite according to claim 1 prepares the method for artificial mullite raw material, the interpolation medicament that it is characterized in that described step (2) aluminium silicon flotation separation is: yellow soda ash 6kg/t raw ore, sodium oleate 300g/t raw ore-400g/t raw ore, flotation time are 4 minutes.
8. a kind of bauxite according to claim 1 prepares the method for artificial mullite raw material, it is characterized in that described step (5) takes off the medicament total amount that the titanium flotation adds and be: sulfuric acid 2kg/t raw ore, Sodium Silicofluoride 1.6kg/t raw ore-2kg/t raw ore, lead nitrate 800g/t raw ore-1000g/t raw ore, styryl phosphonic acid 1100g/t raw ore-1300g/t raw ore.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372462A (en) * | 2011-08-18 | 2012-03-14 | 中国铝业股份有限公司 | Method for preparing artificial stone by bauxite flotation tailings |
| CN102515216A (en) * | 2011-11-16 | 2012-06-27 | 何明德 | Technology for producing alumina and simultaneously recovering iron and aluminum by using high-iron bauxite |
| CN103496708A (en) * | 2013-09-24 | 2014-01-08 | 武汉科技大学 | Raw material for synthesizing mullite and preparation method thereof |
| CN108580055A (en) * | 2018-08-01 | 2018-09-28 | 中冶北方（大连）工程技术有限公司 | A kind of ore-dressing technique of iron content molybdenum ore |
| CN114455956A (en) * | 2022-02-10 | 2022-05-10 | 中国地质科学院郑州矿产综合利用研究所 | Method for preparing electrofused mullite from bauxite under coal |
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| US3450257A (en) * | 1964-03-02 | 1969-06-17 | English Clays Lovering Pochin | Processing of clay |
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| US3450257A (en) * | 1964-03-02 | 1969-06-17 | English Clays Lovering Pochin | Processing of clay |
| CN1029546C (en) * | 1992-06-30 | 1995-08-23 | 北京矿冶研究总院 | Flotation method for reducing content of iron and titanium impurities in bauxite |
| CN1270830C (en) * | 2004-10-29 | 2006-08-23 | 东北大学 | Highly efficient ore dressing system of medium-low class aluminium ore |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372462A (en) * | 2011-08-18 | 2012-03-14 | 中国铝业股份有限公司 | Method for preparing artificial stone by bauxite flotation tailings |
| CN102515216A (en) * | 2011-11-16 | 2012-06-27 | 何明德 | Technology for producing alumina and simultaneously recovering iron and aluminum by using high-iron bauxite |
| CN102515216B (en) * | 2011-11-16 | 2014-09-03 | 何明德 | Technology for producing alumina and simultaneously recovering iron and aluminum by using high-iron bauxite |
| CN103496708A (en) * | 2013-09-24 | 2014-01-08 | 武汉科技大学 | Raw material for synthesizing mullite and preparation method thereof |
| CN103496708B (en) * | 2013-09-24 | 2015-03-04 | 武汉科技大学 | Raw material for synthesizing mullite and preparation method thereof |
| CN108580055A (en) * | 2018-08-01 | 2018-09-28 | 中冶北方（大连）工程技术有限公司 | A kind of ore-dressing technique of iron content molybdenum ore |
| CN114455956A (en) * | 2022-02-10 | 2022-05-10 | 中国地质科学院郑州矿产综合利用研究所 | Method for preparing electrofused mullite from bauxite under coal |
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Application publication date: 20110518 |