CN106733136A - Method for separating and concentrating containing boron mineral in a kind of Boron Slag - Google Patents
Method for separating and concentrating containing boron mineral in a kind of Boron Slag Download PDFInfo
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- CN106733136A CN106733136A CN201611017985.4A CN201611017985A CN106733136A CN 106733136 A CN106733136 A CN 106733136A CN 201611017985 A CN201611017985 A CN 201611017985A CN 106733136 A CN106733136 A CN 106733136A
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- boron
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- slag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
Abstract
Method for separating and concentrating containing boron mineral in a kind of Boron Slag, belongs to mineral processing and complex iron ore comprehensive utilization of resources field.It is related to Boron Slag low-cost high-efficiency to be enriched with B2O3Method, for the exploitation of ferro-boron ore resources.It is characterized in that melting point Boron Slag of rear gained well-crystallized as raw material with paigeite fire reduction, through broken, fine grinding, high intensity magnetic separation, boron concentrate and magnesium concentrate are obtained.Boron concentrate compared with directly Boron Slag is used, can reduce leaching agent consumption, shorten leaching time, reduce impurity element leaching as extraction boric acid, the quality raw materials of borax, can finally reduce production cost, reduction environmental pollution；Can also directly as silicate luminescent glass, glass fibre, mineral wool raw material.Magnesium concentrate fusing point is higher, can be as the raw material of high temperature flame-proof heat-insulating material.The method process is simple, cost be relatively low, produced without discarded object, can be connected with the perfection of existing pyrogenic process ferro-boron separating technology, boron, the efficient utilization of magnesium elements in ferro-boron ore resources is realized, with preferable social and economic benefit.
Description
Technical field
The invention belongs to mineral processing and complex iron ore comprehensive utilization of resources field, it is related to Boron Slag low-cost high-efficiency to be enriched with
B2O3Method, for the exploitation of ferro-boron ore resources.
Background technology
Boron product is extensively using chemical industry, medicine, light industry, weaving, electronics, metallurgy, ceramics, building materials, defence and military, sophisticated section
The up to a hundred economic departments such as, agricultural, are referred to as " industrial monosodium glutamate ".At present, the traditional boron magnesium stone ore of China has approached exhaustion, closely
Nian Lai, with the growth of national economy, the demand of boron product gradually increases, and imbalance between supply and demand is very prominent, China more than 60%
Boron rock and products thereof dependence on import.The t of ferro-boron ore reserves 2.83 hundred million, boron rock reserves are (with B2O3Meter) 21,850,000 t, boron resource accounts for
The 58% of ground boron rock gross reserves, is the alternate resources of traditional boron magnesium stone ore in China.However, because the ore deposit is boron, iron, magnesium etc.
Complex deposit, the grade of boron is relatively low, it is difficult to directly meet boron industrial requirements, and processing and utilization difficulty is larger, and production cost is high, and boron is returned
Yield is low, therefore the ore deposit cannot obtain rationally efficiently utilizing all the time.
A rational thinking of comparing on low-grade paigeite is：In realizing low-grade paigeite by ore dressing first
The initial physical of boron and iron is separated, and obtains boron concentrate and ferro-boron concentrate, and the activated roasting of boron concentrate can directly as boronation work
The quality raw materials of industry；Ferro-boron concentrate realizes iron boron secondary separation by the method that selective reduction is melted point, obtain pig iron containing boron (or
Half steel) and Boron Slag, the pig iron (or half steel) as steelmaking feed, as the raw material of boron chemical engineering industry after Boron Slag is activated.Mesh
Before, the fire concentrate for boron in paigeite and iron has successively proposed the molten division technique of blast furnace process, solid phase reduction-electric furnace, has turned
Bottom stove pearl iron process etc., but paigeite comprehensive utilization flow success or not it is critical only that how to obtain high-grade Boron Slag
To meet the demand of follow-up chemical industry or material preparation section.
The pyrogenic process processing and utilization flow of ferro-boron concentrate realizes the double effect of chemical industry and metallurgy, not only realizes boron and iron
Secondary separation, also complete the reduction of ferriferous oxide and the roasting of boron rock.Importantly, being reconstructed by high temperature mineral and cold
But crystallize, realize the difference crystal growth containing boron mineral and gangue mineral, in the Boron Slag of well-crystallized, boracic thing phase volume
, up to 45%, the volume content of gangue phase (mainly olivine) is up to 50%, and size is bigger for content.The two crystallite dimension up to 20~
100 μm or so, be that the further enrichment of boron creates condition.
Melt point gained Boron Slag one is disadvantageous in that pyrogenic process, the olivine acidleach dissolving out capability in slag preferably,
Boron Slag acid system prepares meeting a large amount of dissolutions simultaneously during boric acid, causes leachate Central Plains silicate content to increase, when condition is suitable
When preferably, the orthosilicic acid in leachate can form Ludox, cause the mobility of slurry to be deteriorated, it is difficult to filter, while have impact on boron
Acid and the crystallization of magnesium salts so that chemical process cannot be normally carried out.
It can be seen from mineralogy rudimentary knowledge, suanite is non magnetic ore, and olivine is weak magnetic mineral.And due to
The special mineral phase structure of paigeite, causes the nucleus of olivine in Boron Slag to there is a certain amount of metallic iron, makes its magnetic
Can further enhance.Therefore, it can realize that non magnetic boracic thing phase and magnetic are relatively strong in Boron Slag by the method for magnetic separation
Olivine phase separation.
At present, on B in paigeite, the molten division technique gained Boron Slag of ferro-boron concentrate pyrogenic process2O3Enrichment method research compared with
Few, this method is based on the fundamental characteristics (such as grain size, embedding cloth relation, magnetic difference) of different minerals in Boron Slag, passes through
Simply, ripe broken-ore grinding-magnetic separation process is the separation for being capable of achieving boracic thing phase and olivine phase in slag, obtains boron concentrate
With magnesium concentrate, compared with original Boron Slag, B in gained boron concentrate2O3Content is significantly improved, while alleviating olivine in boric acid
To slurry filtration and leachate boric acid, the adverse effect of magnesium salts crystalise in preparation process.With the Land use systems phase of existing Boron Slag
Than, the consumption of leaching agent can be not only reduced, shorten leaching time, reduce impurity element and leach, so as to reduce production cost, subtract
Few environmental pollution；Also achieve without waste production, gained weak magnetic concentrate can do high temperature flame-proof heat-insulating material, such as forsterite
Brick, filler for tap holes of electric furnace, casting model powder etc..
Chinese patent (the application number of entitled " equipment, the method and system of boron resource in hypergravity separating boron slag "：
CN201310627886.8), equipment, the method and system of boron resource in a kind of hypergravity separating boron slag are disclosed, the method will
Melting boron slag is cooled down in 1300~1200 DEG C of temperature ranges with the cooldown rate less than 2 DEG C/min, heat treatment boron slag is obtained, to institute
Stating heat treatment boron slag carries out centrifugal hypergravity separation, can be obtained after centrifugal hypergravity is separated suanite grade 70~
80% smart boron slag, the rate of recovery of boron can reach 80~90% in boron slag.But the method needs to use high temperature, and hypergravity sets
Standby, this kind of equipment enlarging and stable operation difficulty are larger, are not suitable for maximization production, and need high-temperature operation, energy consumption compared with
It is high.
Liu Sulan etc. exists《Northeastern University's journal》On carried out " experimental study of Boron Slag sulfuric acid leaching ", the research it is basic
Content and result are：With Boron Slag as raw material, leaching agent is done with sulfuric acid, simulate one-step method preparing boracic acid process, investigated difference
Influence of the factor to acidolysis rate, under the technological parameter of optimization, acidolysis rate can reach more than 90%, B in residue2O3Less than 1%.
But, the technique has that acidleach process has colloid to be formed and causes the experiment cannot to carry out, and the ore deposit such as olivine, aluminium, iron
Thing or element can cause acid consumption to increase in the synchronization dissolution of acidleach process, and production cost is improved, and pickle liquor purified treatment becomes more
Plus it is difficult.
The content of the invention
It is an object of the invention to find a kind of technically feasible, reasonable in economy realize in original Boron Slag containing boron rock
The method that thing with olivine separate, so as to realize the further enrichment of boron, and mitigates the acidolysis of olivine to slurry filtration and boron
Acid, the adverse effect of magnesium salts crystalise.The whole process industry chain (supply chain) of low-grade paigeite thermal process comprehensive utilization is got through, is realized green
The full product of color is without useless clean manufacturing, so as to ensure the strategy supply of China's boron resource, promotes the sustainable benign of China's boron industry
Development.
Method for separating and concentrating containing boron mineral in a kind of Boron Slag, it is characterised in that with molten point of rear institute of paigeite fire reduction
The Boron Slag for obtaining well-crystallized is raw material, through broken, fine grinding, high intensity magnetic separation, obtains the boron concentrate and magnesium concentrate that can efficiently utilize；Base
This flow is：
(1) melting Boron Slag is cooled to 900~1100 DEG C with the cooling velocity of 10~20 DEG C/min, is then air cooled to again
Room temperature, obtains the Boron Slag of well-crystallized, and Boron Slag mainly wraps expansion boracic thing phase and not boracic olivine two-phase；
(2) bulk boron slag is crushed to by 5~10mm using disintegrating machine, reinstalling ball mill carries out fine grinding, control ore discharge grain
It is 0.1~0.038mm to spend；
(3) ore pulp after ball milling is sorted using Wet-type strong magnetic separator, by adjusting magnetic field intensity, obtains different product
Position and the weak magnetic concentrate and nonmagnetic tailings of yield, weak magnetic concentrate is magnesium concentrate, and nonmagnetic tailings are boron concentrate；
(4) the non magnetic concentrate of gained is carried out into secondary grinding and magnetic separation, further improves boracic thing phase and olivine thing phase
Separating effect, improve boron total recovery rate.
Boron Slag used of the invention can be that blast furnace Boron Slag, electric furnace Boron Slag, rotary hearth furnace Boron Slag and paigeite are straight
Connect gained Boron Slag etc. after reduction magnetic separation gained boron concentrate is melted.In magnetic separation operation, present invention magnetic plant used is that wet type is strong
Magnetic separator, sorting area cylinder table magnetic field intensity is 5000~10000Gs, pulp density 25%~35%.After through magnetic separation, containing boron mineral
Boron concentrate is primarily entered, gangue mineral (mainly olivine) primarily enters magnesium concentrate.B in boron concentrate2O3Content be 30~
35%, B in boron concentrate2O3Recovery rate be 86~92%, B in magnesium concentrate2O3Content is 3~5%.Boron concentrate can be as carrying
The quality raw materials of boric acid, borax are taken, leaching agent consumption can be reduced, shortened leaching time, reduced impurity element leaching, finally may be used
Production cost is reduced, environmental pollution is reduced；Can also directly as silicate luminescent glass, glass fibre, mineral wool raw material.
Magnesium concentrate fusing point is higher, can be as the raw material of the refractory materials such as forsterite brick, filler for tap holes of electric furnace, casting model powder.
Had the advantage that compared with prior art：
Strong innovation of the present invention, with process is simple, equipment is few, energy consumption is low, production efficiency is high, low production cost, whole
Process realizes the advantages of cleaning is produced without waste.Can be connected with the perfection of existing pyrogenic process ferro-boron separating technology, realize ferro-boron ore resources
The efficient utilization of middle boron, magnesium elements.Help to get through " molten point-molten point of low-grade paigeite ore dressing-ferro-boron concentrate selective reduction
Boron Slag high-efficiency cleaning is without useless utilization " comprehensive utilization new technological process, be sustainable development and the characteristic compound iron of China boron industry
The comprehensive utilization of ore resources is contributed share.
Brief description of the drawings
Fig. 1 is the microstructure of slow cooling Boron Slag
Fig. 2 is the dissociated state of different minerals phase when being crushed to below 0.074mm
Fig. 3 is process flow diagram of the invention
Specific embodiment
Embodiment 1
The chemical composition that certain ferro-boron concentrate melts gained Boron Slag after dividing through reduction is as shown in table 1.Boron Slag is heated to
1400 DEG C, 10min is incubated, is then cooled to 900~1100 DEG C with the cooling velocity of 10~20 DEG C/min, room is then air cooled to again
Temperature, obtains the Boron Slag of well-crystallized.Bulk boron slag is crushed to by 5~10mm using jaw crusher, ball mill is reinstalled and is entered
Row fine grinding, controls ore discharge granularity for 100% less than 0.043mm.Control Wet-type strong magnetic separator sort area cylinder table magnetic field intensity be
6500Gs, the separation index for obtaining boron concentrate and magnesium concentrate is as shown in table 2.
The Boron Slag main component of table 1
The magnetic separation result of the test of table 2
Embodiment 2
From the Boron Slag of chemical composition as shown in table 1, using cooling same as Example 1, broken and grinding process.
It is 9510Gs to control Wet-type strong magnetic separator to sort area's cylinder table magnetic field intensity, obtains the separation index such as table of boron concentrate and magnesium concentrate
Shown in 3.There it can be seen that because magnetic field intensity increases, causing more intergrowth particle to be selected into weak magnetic phase so that boron
The recovery rate reduction of concentrate, but grade increases.
The magnetic separation result of the test of table 3
Embodiment 3
From the Boron Slag of chemical composition as shown in table 1, using cooling same as Example 1 and crushing process.In mill
In the ore deposit stage, Boron Slag is milled to 100% less than 0.074mm first, control Wet-type strong magnetic separator to sort area tin table magnetic field intensity to be
5000Gs, obtains a weak magnetic phase and a non-magnetic phase, and one time weak magnetic mutually can be as magnesium concentrate.Non-magnetic phase after
It is continuous to carry out secondary grinding, ore discharge granularity is controlled for 100% less than 0.038mm, then secondary wet high-intensity magnetic separation is carried out, sorting area cylinder table
Magnetic field intensity is 10000Gs, obtains boron concentrate and secondary magnesium concentrate.Magnesium concentrate and secondary magnesium concentrate merge as magnesium essence
Ore deposit, separation index is as shown in table 4.
The magnetic separation result of the test of table 4
Claims (3)
1. the method for separating and concentrating of boron mineral is contained in a kind of Boron Slag, it is characterised in that with molten point of rear gained of paigeite fire reduction
The Boron Slag of well-crystallized is raw material, through broken, fine grinding, high intensity magnetic separation, obtains the boron concentrate and magnesium concentrate that can efficiently utilize；
Technical process is：
(1) melting Boron Slag is cooled to 900~1100 DEG C with the cooling velocity of 10~20 DEG C/min, room is then air cooled to again
Temperature, obtains the Boron Slag of well-crystallized, and Boron Slag mainly includes boracic thing phase and not boracic olivine two-phase；
(2) bulk boron slag is crushed to by 5~10mm using disintegrating machine, reinstalling ball mill carries out fine grinding, controls the ore discharge granularity to be
0.1~0.038mm；
(3) ore pulp after ball milling is sorted using Wet-type strong magnetic separator, by adjusting magnetic field intensity, obtain different grades and
The weak magnetic concentrate and nonmagnetic tailings of yield, weak magnetic concentrate are magnesium concentrate, and nonmagnetic tailings are boron concentrate；
(4) the non magnetic concentrate of gained is carried out into secondary grinding and magnetic separation, further improve boracic thing phase and olivine thing phase point
From effect, total recovery rate of boron is improved.
2. the method for separating and concentrating of boron mineral is contained in a kind of Boron Slag as claimed in claim 1, it is characterised in that：Magnetic separation used
Equipment is Wet-type strong magnetic separator, and sorting area cylinder table magnetic field intensity is 5000~10000Gs.
3. the method for separating and concentrating of boron mineral is contained in a kind of Boron Slag as claimed in claim 1, it is characterised in that：In boron concentrate
B2O3Content is 30~35%, B in boron concentrate2O3Recovery rate be 86~92%, B in magnesium concentrate2O3Content is 3~5%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611017985.4A CN106733136B (en) | 2016-11-17 | 2016-11-17 | Method for separating and concentrating containing boron mineral in a kind of Boron Slag |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611017985.4A CN106733136B (en) | 2016-11-17 | 2016-11-17 | Method for separating and concentrating containing boron mineral in a kind of Boron Slag |
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| CN106733136A true CN106733136A (en) | 2017-05-31 |
| CN106733136B CN106733136B (en) | 2018-11-06 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1367043A (en) * | 2002-02-21 | 2002-09-04 | 刘庆方 | Meneral separation method of boron-magnesium-iron ore |
| CN1374150A (en) * | 2002-01-28 | 2002-10-16 | 赵庆杰 | Magnetic and gravitational separation and comprehensive utilization of vonsenite |
| CN101733195A (en) * | 2008-11-20 | 2010-06-16 | 李家珍 | Combined ore dressing process for iron ore concentrate powder and boron ore concentrate powder produced by magnetic ludwigite |
| CN102162017A (en) * | 2011-03-18 | 2011-08-24 | 北京科技大学 | Method for comprehensively utilizing paigeite by rotary hearth furnace iron bead process |
| CN105238990A (en) * | 2015-11-12 | 2016-01-13 | 中冶东方工程技术有限公司 | Boron silicon iron alloy and production method thereof |
-
2016
- 2016-11-17 CN CN201611017985.4A patent/CN106733136B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1374150A (en) * | 2002-01-28 | 2002-10-16 | 赵庆杰 | Magnetic and gravitational separation and comprehensive utilization of vonsenite |
| CN1367043A (en) * | 2002-02-21 | 2002-09-04 | 刘庆方 | Meneral separation method of boron-magnesium-iron ore |
| CN101733195A (en) * | 2008-11-20 | 2010-06-16 | 李家珍 | Combined ore dressing process for iron ore concentrate powder and boron ore concentrate powder produced by magnetic ludwigite |
| CN102162017A (en) * | 2011-03-18 | 2011-08-24 | 北京科技大学 | Method for comprehensively utilizing paigeite by rotary hearth furnace iron bead process |
| CN105238990A (en) * | 2015-11-12 | 2016-01-13 | 中冶东方工程技术有限公司 | Boron silicon iron alloy and production method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 孙新华等: "硼镁矿综合利用研究", 《无机盐工业》 * |
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