CN106733136B - 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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- CN106733136B CN106733136B CN201611017985.4A CN201611017985A CN106733136B CN 106733136 B CN106733136 B CN 106733136B CN 201611017985 A CN201611017985 A CN 201611017985A CN 106733136 B CN106733136 B CN 106733136B
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- boron
- concentrate
- slag
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- magnesium
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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 enrichment B2O3Method, be used for ferro-boron ore resources utilization.It is characterized in that using the Boron Slag of molten point of rear gained well-crystallized of paigeite fire reduction as raw material, through broken, fine grinding, high intensity magnetic separation, boron concentrate and magnesium concentrate are obtained.Boron concentrate is as extraction boric acid, the quality raw materials of borax, compared with directly using Boron Slag, can reduce leaching agent consumption, shorten leaching time, reduces impurity element leaching, can finally reduce production cost, reduce environmental pollution；It can also be directly as silicate luminescent glass, the raw material of glass fibre, mineral wool.Magnesium concentrate fusing point is higher, can be as the raw material of high temperature flame-proof heat-insulating material.The method is simple for process, cost is relatively low, is generated without waste, can be connect with existing pyrogenic process ferro-boron separating technology perfection, realize the efficient utilization of boron, magnesium elements in ferro-boron ore resources, have preferable social and economic benefit.
Description
Technical field
The invention belongs to mineral processing and complex iron ore comprehensive utilization of resources fields, are related to the enrichment of Boron Slag low-cost high-efficiency
B2O3Method, be used for ferro-boron ore resources utilization.
Background technology
Boron product is extensively using chemical industry, medicine, light industry, weaving, electronics, metallurgy, ceramics, building materials, defence and military, tip section
A economic departments up to a hundred such as, agricultural, are referred to as " industrial monosodium glutamate ".Currently, the traditional boron magnesium stone ore in China has been 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, 60% or more China
Boron rock and products thereof rely on import.2.83 hundred million t of ferro-boron ore reserves, 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, since the mine is boron, iron, magnesium etc.
The grade of complex deposit, boron is relatively low, it is difficult to directly meet boron industrial requirements, processing and utilization difficulty is larger, and production cost is high, and boron returns
Yield is low, therefore the mine is unable to get and rationally efficiently utilizes all the time.
A rational thinking of comparison about low-grade paigeite is：It is realized in low-grade paigeite by ore dressing first
The initial physical of boron and iron detaches, and obtains boron concentrate and ferro-boron concentrate, the activated roasting of boron concentrate can be directly as boronation work
The quality raw materials of industry；Ferro-boron concentrate realizes iron boron secondary separation by the method for molten point of selective reduction, obtain pig iron containing boron (or
Half steel) and Boron Slag, the pig iron (or half steel) is as steelmaking feed, the raw material after Boron Slag is activated as boron chemical engineering industry.Mesh
Before, blast furnace process is successively proposed for the fire concentrate of boron in paigeite and iron, solid phase reduction-electric furnace melts division technique, turns
Bottom stove pearl iron process etc., but the key of paigeite comprehensive utilization flow success or not is how to obtain high-grade Boron Slag
The needs of to meet follow-up chemical industry or material preparation process.
The pyrogenic process processing and utilization flow of ferro-boron concentrate realizes chemical industry and metallurgical double effect, not only realizes boron and iron
Secondary separation, also complete the reduction of ferriferous oxide and the roasting of boron rock.Importantly, by high temperature mineral reconstruct and it is cold
But it crystallizes, realizes the difference crystal growth containing boron mineral and gangue mineral, in the Boron Slag of well-crystallized, boracic object phase volume
Content is up to 45%, and for the volume content of gangue phase (mainly olivine) up to 50%, size is bigger.The two crystallite dimension up to 20~
100 μm or so, condition is created for the further enrichment of boron.
One of molten point of gained Boron Slag of pyrogenic process is disadvantageous in that the olivine acidleach dissolving out capability in slag is preferable,
Boron Slag acid system a large amount of simultaneously can dissolve out during preparing boric acid, and leachate Central Plains silicate content is caused to increase, when condition is suitable
When suitable, the orthosilicic acid in leachate can form Ludox, cause the mobility of slurry to be deteriorated, it is difficult to filter, while affect boron
The crystallization of acid and magnesium salts so that chemical process can not be normally carried out.
According to mineralogy rudimentary knowledge it is found that suanite is non magnetic ore, olivine is weak magnetic mineral.And due to
The special mineral phase structure of paigeite causes the nucleus of olivine in Boron Slag there are a certain amount of metallic iron, makes its magnetism
It can further enhance.Therefore, it can realize that non magnetic boracic object phase and magnetism are relatively strong in Boron Slag by the method for magnetic separation
Olivine phase separation.
Currently, melting B in Boron Slag obtained by division technique about paigeite, ferro-boron concentrate pyrogenic process2O3Enrichment method research compared with
Few, fundamental characteristics (such as grain size, embedding cloth relationship, magnetic difference) of this method based on different minerals in Boron Slag passes through
Simply, the separation of boracic object phase and olivine phase in slag can be realized in ripe broken-ore grinding-magnetic separation process, obtains boron concentrate
With magnesium concentrate, compared with original Boron Slag, B in gained boron concentrate2O3Content significantly improves, while alleviating olivine in boric acid
To the adverse effect of slurry filtration and leachate boric acid, magnesium salts crystalise in preparation process.With the Land use systems phase of existing Boron Slag
Than can not only reduce the consumption of leaching agent, shorten leaching time, reduce impurity element and leach, to reduce production cost, subtract
Few environmental pollution；No waste production is also achieved, 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, this method will
Melting boron slag is cooled down in 1300~1200 DEG C of temperature ranges with the cooling rate for being less than 2 DEG C/min, heat treatment boron slag is obtained, to institute
State heat treatment boron slag and carry out centrifugal hypergravity separation, can be obtained after being detached by centrifugal hypergravity suanite grade 70~
80% smart boron slag, the rate of recovery of boron can reach 80~90% in boron slag.But this method needs to set using high temperature hypergravity
Standby, this kind of equipment enlarging and stable operation difficulty are larger, are not suitable for enlargement production, and need high-temperature operation, energy consumption compared with
It is high.
Liu Sulan etc. exists《Northeastern University's journal》It is upper to carry out " experimental study of Boron Slag sulfuric acid leaching ", the research it is basic
Content and the result is that：Using Boron Slag as raw material, leaching agent is done with sulfuric acid, one-step method preparing boracic acid process is simulated, has investigated difference
Influence of the factor to acidolysis rate, under the technological parameter of optimization, acidolysis rate can reach 90% or more, B in residue2O3Less than 1%.
But the technique has that acidleach process has colloid formation to cause experiment that can not carry out, and the mines such as olivine, aluminium, iron
Object or element can be synchronized in acidleach process to be dissolved out, and causes acid consumption to increase, increased production cost, and pickle liquor purified treatment becomes more
Add difficulty.
Invention content
It is an object of the invention to find to contain boron rock in a kind of technically feasible, reasonable in economy the original Boron Slag of realization
The method that object is detached with olivine to realize the further enrichment of boron, and mitigates the acidolysis of olivine to slurry filtration and boron
The adverse effect of acid, 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 promotes the sustainable benign of China's boron industry without useless clean manufacturing to ensure the strategy supply of China's boron resource
Development.
Method for separating and concentrating containing boron mineral in a kind of Boron Slag, it is characterised in that with an institute after molten point of paigeite fire reduction
The Boron Slag for obtaining well-crystallized is that raw material obtains the boron concentrate that can efficiently utilize and magnesium concentrate through broken, fine grinding, high intensity magnetic separation；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, be then air-cooled to again
Room temperature obtains the Boron Slag of well-crystallized, and Boron Slag, which mainly wraps, expands boracic object phase and not boracic olivine two-phase；
(2) bulk boron slag is crushed to by 5~10mm using crusher, is reloaded into ball mill and carries out fine grinding, controls ore discharge grain
Degree is 0.1~0.038mm；
(3) ore pulp after ball milling is sorted using Wet-type strong magnetic separator, by adjusting magnetic field intensity, obtains different product
The weak magnetic concentrate and nonmagnetic tailings of position and yield, weak magnetic concentrate are magnesium concentrate, and nonmagnetic tailings are boron concentrate；
(4) the non magnetic concentrate of gained is subjected to secondary grinding and magnetic separation, further increases boracic object phase and olivine object phase
Separating effect, improve total recovery rate of boron.
Boron Slag used in the present 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 boron concentrate obtained by reduction magnetic separation melts.In magnetic separation process, magnetic plant used in the present invention is that wet type is strong
Magnetic separator, sorting area cylinder table magnetic field intensity is 5000~10000Gs, pulp density 25%~35%.After magnetic separation, contain 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, shorten leaching time, reduce impurity element leaching, finally may be used
Production cost is reduced, is reduced environmental pollution；It can also be directly as silicate luminescent glass, the raw material of glass fibre, mineral wool.
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.
Possessed advantage compared with prior art：
Strong innovation of the present invention, with simple for process, equipment is few, low energy consumption, production efficiency is high, production cost is low, entire
Process realizes the advantages that cleaning is produced without waste.It can be connect with existing pyrogenic process ferro-boron separating technology perfection, 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 the industry of China's boron sustainable development and characteristic compound iron
The comprehensive utilization of ore resources is contributed share.
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 0.074mm or less
Fig. 3 is the process flow diagram of the present invention
Specific implementation mode
Embodiment 1
The chemical composition of certain ferro-boron concentrate gained Boron Slag after restoring molten point is as shown in table 1.Boron Slag is heated to
1400 DEG C, 10min is kept the temperature, then 900~1100 DEG C is cooled to the cooling velocity of 10~20 DEG C/min, is then air-cooled to room again
Temperature obtains the Boron Slag of well-crystallized.Bulk boron slag is crushed to by 5~10mm using jaw crusher, be reloaded into ball mill into
Row fine grinding, control ore discharge granularity are 100% less than 0.043mm.Control Wet-type strong magnetic separator sorts area's cylinder table magnetic field intensity
The separation index of 6500Gs, obtained boron concentrate and magnesium concentrate is as shown in table 2.
1 Boron Slag main component of table
2 magnetic separation test result of table
Embodiment 2
The Boron Slag for selecting chemical composition as shown in table 1, using cooling same as Example 1, broken and grinding process.
It is 9510Gs, the separation index such as table of obtained boron concentrate and magnesium concentrate to control Wet-type strong magnetic separator sorting area cylinder table magnetic field intensity
Shown in 3.There it can be seen that since magnetic field intensity increases, more intergrowth particle is caused to be selected into weak magnetic phase so that boron
The recovery rate of concentrate reduces, but grade increases.
3 magnetic separation test result of table
Embodiment 3
The Boron Slag for selecting chemical composition as shown in table 1, using cooling same as Example 1 and crushing process.It is grinding
Boron Slag is milled to 100% first and is less than 0.074mm by the mine stage, and control Wet-type strong magnetic separator sorting area cylinder table magnetic field intensity is
5000Gs obtains a weak magnetic phase and a non-magnetic phase, and one time weak magnetic mutually can be used as magnesium concentrate.Non-magnetic phase after
Continuous to carry out secondary grinding, control ore discharge granularity is less than 0.038mm for 100%, then carries out secondary wet high-intensity magnetic separation, 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
Mine, separation index are as shown in table 4.
4 magnetic separation test result of table
Claims (3)
1. the method for separating and concentrating containing boron mineral 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 that raw material obtains the boron concentrate that can efficiently utilize and magnesium concentrate through broken, fine grinding, high intensity magnetic separation；
Technical process 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 room again
Temperature, obtains the Boron Slag of well-crystallized, and Boron Slag includes mainly boracic object phase and not boracic olivine two-phase；
(2) bulk Boron Slag is crushed to by 5~10mm using crusher, is reloaded into ball mill and carries out fine grinding, controls ore discharge granularity
For 0.1~0.038mm；
(3) ore pulp after ball milling is sorted using Wet-type strong magnetic separator, by adjust 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) gained nonmagnetic tailings are subjected to secondary grinding and magnetic separation, further increase point of boracic object phase and olivine object phase
From effect, total recovery rate of boron is improved.
2. the method for separating and concentrating containing boron mineral in a kind of Boron Slag as described 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 containing boron mineral in a kind of Boron Slag as described 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%.
Priority Applications (1)
| 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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|---|---|---|---|
| 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 CN106733136A (en) | 2017-05-31 |
| CN106733136B true CN106733136B (en) | 2018-11-06 |
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Family Cites Families (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 |
| CN102162017B (en) * | 2011-03-18 | 2012-10-10 | 北京科技大学 | Method for comprehensively utilizing paigeite by rotary hearth furnace iron bead process |
| CN105238990B (en) * | 2015-11-12 | 2017-11-10 | 中冶东方工程技术有限公司 | A kind of borosilicate ferroalloy and its production method |
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