CN110090731A - A kind of low-grade magnesite uses the process of magnetic fluid ore dressing - Google Patents
A kind of low-grade magnesite uses the process of magnetic fluid ore dressing Download PDFInfo
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- CN110090731A CN110090731A CN201910417957.9A CN201910417957A CN110090731A CN 110090731 A CN110090731 A CN 110090731A CN 201910417957 A CN201910417957 A CN 201910417957A CN 110090731 A CN110090731 A CN 110090731A
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- magnesite
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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
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
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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
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
- B03C1/30—Combinations with other devices, not otherwise provided for
Abstract
The present invention provides the process that a kind of low-grade magnesite uses magnetic fluid ore dressing, comprising the following steps: broken, stirring, screening, ore grinding, size mixing, magnetize, magnetic separation.Middle-low grade magnesite of the present invention increases vertical turbulent blender stirring and washing vibrating screen washup process, it is therefore intended that by strong stirring, increase dolomite surface and dissolve out Ca after two sections broken2+、Mg2+Speed, and pass through high pressure water flushing washup stone, the Ca of removal mineral surface absorption2+、Mg2+, the otherness of magnesite surface nature and dolomite is improved, raising sorts precision, sorting medicament and magnetic kind dosage are reduced, magnesite concentrate grade is improved and the rate of recovery, this method process is simple, dosing is low, at low cost, has preferable Social benefit and economic benefit.
Description
Technical field
The present invention relates to low-grade magnesite technical field of beneficiation, specifically a kind of low-grade magnesite is selected using magnetic fluid
The process of mine.
Background technique
Magnesite is the primary raw material of extracting metals magnesium, and the 2/3 of world's magnesite ore reserves concentrates on China, the 1/2 of yield
It is provided by China, in the world, in the market, China has very important status to magnesite.Although the magnisite resource in China
Very abundant, but by the exploitation of decades, the magnesite of commerical grade is fewer and fewer, and especially high-grade magnesite is at certain
A little areas have been unable to meet production needs.And low-grade magnesite cannot be directly used to the production of expensive goods, especially
A large amount of low-grade magnesite is not used, and causes the waste of magnesite resource.Therefore, consider from long-term interest, in order to more
Low-grade magnesite is become to calcine high-quality resistance to by good utilization resource using the impurity silicon of beneficiation method removing magnesite
Fiery material.To solve the problems, such as that magnesite resource utilization rate is low and high-grade magnesite is short.
Magnetic fluid ore dressing is the new process in magnetic separation, including static separation with magnetic fluid and magnetohydrodynamic separation.It is with
Special stream compares as separating medium, is generated under the synergy of magnetic field or magnetic field and electric field using these specialized fluids
" exacerbation " effect, by the magnetism of mineral and the difference of density, or magnetic, electric conductivity and density difference and realize different minerals
A kind of beneficiation method of separation.When magnetic contrast is small between mineral, and when density or larger conductivity difference, selected using magnetic fluid
Mine method can be realized and be efficiently separated.
Currently, the domestic mineral for using magnetic current body sorting are mainly low-grade copper nickel sulfide ore, pentlandite, coal slime, sand
Gold, limonite etc. do not find to sort low-grade magnesite using this technology.
Summary of the invention
The object of the present invention is to provide the process that a kind of low-grade magnesite uses magnetic fluid ore dressing, low-grade magnesites
Mine obtains MgO > 47.24%, MgO rate of recovery > 78%, CaO < 0.5%, SiO2 by broken, washup, ore grinding, magnetic current body sorting
The magnesite concentrate powder of < 0.3% can be used for smelting magnesium raw material after being granulated.This method simple process, passes through high intensity mixer
Stirring, dolly washup, can partially remove Soluble Ca2+Influence to subsequent ore dressing, and stone is removed by magnetic fluid ore dressing
The gangue minerals such as English, dolomite realize that low-grade magnesite sorts preparation smelting magnesium high-quality feedstocks.
The technical scheme of the present invention is realized as follows:
A kind of low-grade magnesite uses the process of magnetic fluid ore dressing, comprising the following steps:
(1) low-grade magnesite is successively passed through to one section of hydro cone-crusher and two sections of high pressure roller mill crushers are crushed,
Obtain material a；
(2) step (1) material a is sent in vertical turbulent blender by belt and is sufficiently stirred, obtain homogeneous ore pulp；
(3) step (2) homogeneous ore pulp is pumped to washing vibrating screen by Pulp pump to sieve, obtains oversize；
(4) step (3) oversize is sent to overflow type rod mill and carries out ore grinding, obtain material b；
(5) step (4) material b sized mixing, magnetized, magnetic separation, obtain magnetic concentrate and magnetic tailing.
Preferably, the content of Hubeiwan MgO is 38% in step (1) low-grade magnesite, main impurity CaO
Content is that 2.25%, SiO2 content is 9.84%, and by the criteria for classifying of magnesite ore grade, which belongs to high-silicon high calcium type
Low-grade magnesite.
Preferably, the granularity of step (1) the material a is that -0.5mm accounts for 40%~45%.
Preferably, solid-to-liquid ratio is 1:(2.5~3 in step (2) blender).
Preferably, the screen size of the step (3) washing vibrating screen is -0.1mm, washup hydraulic pressure be 0.25Mpa~
0.30Mpa, water consumption are 1.5~2m3/t。
Preferably, the granularity of step (4) the material b is to account for 80%~90% in -0.074mm, ore milling concentration is 55%~
60%。
Preferably, the step (5) is sized mixing using sodium carbonate as pH adjuster, and dosage is 50~80g/t, using six
Sodium metaphosphate is as dispersing agent, and dosage is the g/t of 180g/t~200, using sodium alginate, ether amines as activator, sodium alginate
Dosage is the g/t of 30 g/t~40, and ether amines dosage is the g/t of 100 g/t~120, and the pH value for adjusting ore pulp is 6.8~7.2, mine
The concentration of slurry is 25%~30%.
Preferably, step (5) magnetization selects magnetic iron ore as magnetic kind, and granularity is 10 μm~12 μm, dosage 50kg/
T~55kg/t, magnetic iron ore modifying agent use stearic acid and enuatrol mixture, and dosage is the 8%~10% of magnetic iron ore quality, stearic
The mass ratio that acid is mixed with enuatrol is 1:4.
Preferably, step (5) magnetic separation uses high gradient magnetic separator, and magnetic field strength is 1.3T~1.5T.
Preferably, step (5) magnetic concentrate be containing dolomite, quartz gangue mineral, magnetic tailing be containing
The valuable mineral of magnesite, the MgO > 47.24% of magnesite concentrate, MgO rate of recovery > 78%, CaO < 0.5%, SiO2 < 0.3%,
Reach the requirement of smelting magnesium raw material.
The invention has the benefit that
Middle-low grade magnesite of the present invention increases vertical turbulent blender stirring and washing vibrating screen washup after two sections broken
Process, it is therefore intended that by strong stirring, increase dolomite surface and dissolve out Ca2+、Mg2+Speed, and pass through high pressure water flushing washup
Stone, the Ca of removal mineral surface absorption2+、Mg2+, the otherness of magnesite surface nature and dolomite is improved, raising sorts essence
Degree reduces sorting medicament and magnetic kind dosage, improves magnesite concentrate grade and the rate of recovery, this method process is simple, medicament
Dosage is low, at low cost, has preferable Social benefit and economic benefit.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that implement describedly
Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Embodiment 1:
A kind of low-grade magnesite uses the process of magnetic fluid ore dressing, comprising the following steps:
(1) low-grade magnesite is successively passed through to one section of hydro cone-crusher and two sections of high pressure roller mill crushers are crushed,
The control of ore removal granularity accounts for 40% in -0.5mm, obtains material a；
(2) step (1) material a is sent in vertical turbulent blender by belt and is sufficiently stirred, solid-to-liquid ratio 1:
2.5, obtain homogeneous ore pulp；
(3) step (2) homogeneous ore pulp is pumped to washing vibrating screen by Pulp pump to sieve, washes the sieve pore ruler of vibrating screen
Very little is -0.1mm, and washup hydraulic pressure is 0.25Mpa, water consumption 1.5m3/ t, obtains oversize；
(4) step (3) oversize is sent to overflow type rod mill and carries out ore grinding, the control of ore grinding discharging-material size is accounted in -0.074mm
80%, ore milling concentration 55% obtains material b；
(5) step (4) material b is sized mixing, the pH value for adjusting ore pulp is 6.8, and the concentration of ore pulp is 25%, using sodium carbonate
As pH adjuster, dosage 50g/t, using calgon as dispersing agent, dosage 180g/t, using alginic acid
As activator, sodium alginate dosage is 30 g/t for sodium, ether amines, and ether amines dosage is 100 g/t；
(6) material after step (5) being sized mixing magnetizes, and selects magnetic iron ore as magnetic kind, and granularity is 10 μm, and dosage is
50kg/t, magnetic iron ore modifying agent use stearic acid and enuatrol mixture, and dosage is the 8% of magnetic iron ore quality, stearic acid and oleic acid
The mass ratio of sodium mixing is 1:4；
(7) material after step (6) magnetization is subjected to magnetic separation, using high gradient magnetic separator, magnetic field strength 1.3T obtains magnetic separation
Concentrate and magnetic tailing.
It is the gangue mineral containing dolomite, quartz that magnetic concentrate, which is made, in the present embodiment, and magnetic tailing is to contain magnesite
Valuable mineral, the MgO of magnesite concentrate is that 48.36%, the MgO rate of recovery is 79%, CaO 0.45%, SiO2It is 0.28%, reaches
The requirement of smelting magnesium raw material.
Embodiment 2:
A kind of low-grade magnesite uses the process of magnetic fluid ore dressing, comprising the following steps:
(1) low-grade magnesite is successively passed through to one section of hydro cone-crusher and two sections of high pressure roller mill crushers are crushed,
The control of ore removal granularity accounts for 43% in -0.5mm, obtains material a；
(2) step (1) material a is sent in vertical turbulent blender by belt and is sufficiently stirred, solid-to-liquid ratio 1:
2.7, obtain homogeneous ore pulp；
(3) step (2) homogeneous ore pulp is pumped to washing vibrating screen by Pulp pump to sieve, washes the sieve pore ruler of vibrating screen
Very little is -0.1mm, and washup hydraulic pressure is 0.28Mpa, water consumption 1.7m3/ t, obtains oversize；
(4) step (3) oversize is sent to overflow type rod mill and carries out ore grinding, the control of ore grinding discharging-material size is accounted in -0.074mm
85%, ore milling concentration 57% obtains material b；
(5) step (4) material b is sized mixing, the pH value for adjusting ore pulp is 7, and the concentration of ore pulp is 28%, is made using sodium carbonate
For pH adjuster, dosage 65g/t, using calgon as dispersing agent, dosage 190g/t, using sodium alginate,
For ether amines as activator, sodium alginate dosage is 35 g/t, and ether amines dosage is 110 g/t；
(6) material after step (5) being sized mixing magnetizes, and selects magnetic iron ore as magnetic kind, and granularity is 11 μm, and dosage is
53kg/t, magnetic iron ore modifying agent use stearic acid and enuatrol mixture, and dosage is the 9% of magnetic iron ore quality, stearic acid and oleic acid
The mass ratio of sodium mixing is 1:4；
(7) material after step (6) magnetization is subjected to magnetic separation, using high gradient magnetic separator, magnetic field strength 1.4T obtains magnetic separation
Concentrate and magnetic tailing.
It is the gangue mineral containing dolomite, quartz that magnetic concentrate, which is made, in the present embodiment, and magnetic tailing is to contain magnesite
Valuable mineral, the MgO of magnesite concentrate is that 49.13%, the MgO rate of recovery is 80%, CaO 0.41%, SiO2It is 0.25%, reaches
The requirement of smelting magnesium raw material.
Embodiment 3:
A kind of low-grade magnesite uses the process of magnetic fluid ore dressing, comprising the following steps:
(1) low-grade magnesite is successively passed through to one section of hydro cone-crusher and two sections of high pressure roller mill crushers are crushed,
The control of ore removal granularity accounts for 45% in -0.5mm, obtains material a；
(2) step (1) material a is sent in vertical turbulent blender by belt and is sufficiently stirred, solid-to-liquid ratio 1:3,
Obtain homogeneous ore pulp；
(3) step (2) homogeneous ore pulp is pumped to washing vibrating screen by Pulp pump to sieve, washes the sieve pore ruler of vibrating screen
Very little is -0.1mm, and washup hydraulic pressure is 0.30Mpa, water consumption 2m3/ t, obtains oversize；
(4) step (3) oversize is sent to overflow type rod mill and carries out ore grinding, the control of ore grinding discharging-material size is accounted in -0.074mm
90%, ore milling concentration 60% obtains material b；
(5) step (4) material b is sized mixing, the pH value for adjusting ore pulp is 7.2, and the concentration of ore pulp is 30%, using sodium carbonate
As pH adjuster, dosage 80g/t, using calgon as dispersing agent, dosage is 200 g/t, using alginic acid
As activator, sodium alginate dosage is 40 g/t for sodium, ether amines, and ether amines dosage is 120 g/t；
(6) material after step (5) being sized mixing magnetizes, and selects magnetic iron ore as magnetic kind, and granularity is 12 μm, and dosage is
55kg/t, magnetic iron ore modifying agent use stearic acid and enuatrol mixture, and dosage is the 10% of magnetic iron ore quality, stearic acid and oil
The mass ratio of sour sodium mixing is 1:4；
(7) material after step (6) magnetization is subjected to magnetic separation, using high gradient magnetic separator, magnetic field strength 1.5T obtains magnetic separation
Concentrate and magnetic tailing.
It is the gangue mineral containing dolomite, quartz that magnetic concentrate, which is made, in the present embodiment, and magnetic tailing is to contain magnesite
Valuable mineral, it is 81%, CaO 0.38% that the MgO of magnesite concentrate, which is 50.04%, the MgO rate of recovery, and SiO2 0.22% reaches
The requirement of smelting magnesium raw material.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. the process that a kind of low-grade magnesite uses magnetic fluid ore dressing, comprising the following steps:
(1) low-grade magnesite is successively passed through to one section of hydro cone-crusher and two sections of high pressure roller mill crushers are crushed,
Obtain material a；
(2) step (1) material a is sent in vertical turbulent blender by belt and is sufficiently stirred, obtain homogeneous ore pulp；
(3) step (2) homogeneous ore pulp is pumped to washing vibrating screen by Pulp pump to sieve, obtains oversize；
(4) step (3) oversize is sent to overflow type rod mill and carries out ore grinding, obtain material b；
(5) step (4) material b sized mixing, magnetized, magnetic separation, obtain magnetic concentrate and magnetic tailing.
2. the process that a kind of low-grade magnesite according to claim 1 uses magnetic fluid ore dressing, which is characterized in that
The content of Hubeiwan MgO is 38% in step (1) low-grade magnesite, and main impurity CaO content is 2.25%,
SiO2 content is 9.84%, and by the criteria for classifying of magnesite ore grade, which belongs to high-silicon high calcium type low-grade magnesite.
3. the process that a kind of low-grade magnesite according to claim 1 uses magnetic fluid ore dressing, which is characterized in that
The granularity of step (1) the material a is that -0.5mm accounts for 40%~45%.
4. the process that a kind of low-grade magnesite according to claim 1 uses magnetic fluid ore dressing, which is characterized in that
Solid-to-liquid ratio is 1:(2.5~3 in step (2) blender).
5. the process that a kind of low-grade magnesite according to claim 1 uses magnetic fluid ore dressing, which is characterized in that
The screen size of step (3) the washing vibrating screen is -0.1mm, and washup hydraulic pressure is 0.25Mpa~0.30Mpa, and water consumption is
1.5~2m3/t。
6. the process that a kind of low-grade magnesite according to claim 1 uses magnetic fluid ore dressing, which is characterized in that
The granularity of step (4) the material b is to account for 80%~90% in -0.074mm, and ore milling concentration is 55%~60%.
7. the process that a kind of low-grade magnesite according to claim 1 uses magnetic fluid ore dressing, which is characterized in that
The step (5) is sized mixing using sodium carbonate as pH adjuster, and dosage is 50~80g/t, is used as and is divided using calgon
Powder, dosage are the g/t of 180g/t~200, and using sodium alginate, ether amines as activator, sodium alginate dosage is 30 g/t
~40 g/t, ether amines dosage are the g/t of 100 g/t~120, and the pH value for adjusting ore pulp is 6.8~7.2, and the concentration of ore pulp is 25%
~30%.
8. the process that a kind of low-grade magnesite according to claim 1 uses magnetic fluid ore dressing, which is characterized in that
Step (5) magnetization selects magnetic iron ore as magnetic kind, and granularity is 10 μm~12 μm, and dosage is 50kg/t~55kg/t, magnet
Mine modifying agent uses stearic acid and enuatrol mixture, and dosage is the 8%~10% of magnetic iron ore quality, and stearic acid is mixed with enuatrol
Mass ratio be 1:4.
9. the process that a kind of low-grade magnesite according to claim 1 uses magnetic fluid ore dressing, which is characterized in that
Step (5) magnetic separation uses high gradient magnetic separator, and magnetic field strength is 1.3T~1.5T.
10. a kind of low-grade magnesite according to claim 1 uses the process of magnetic fluid ore dressing, feature exists
In step (5) magnetic concentrate is the gangue mineral containing dolomite, quartz, and magnetic tailing is to contain the useful of magnesite
It is former to reach smelting magnesium by mineral, the MgO > 47.24% of magnesite concentrate, MgO rate of recovery > 78%, CaO < 0.5%, SiO2 < 0.3%
The requirement of material.
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| CN201910417957.9A CN110090731B (en) | 2019-05-20 | 2019-05-20 | Process for dressing low-grade magnesite by using magnetic fluid |
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| CN201910417957.9A CN110090731B (en) | 2019-05-20 | 2019-05-20 | Process for dressing low-grade magnesite by using magnetic fluid |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010031619A1 (en) * | 2008-09-18 | 2010-03-25 | Siemens Aktiengesellschaft | Method for separating rich ore particles from agglomerates which contain said rich ore particles and magnetizable particles attached thereto, especially fe3o4 |
| CA2771797A1 (en) * | 2009-08-24 | 2011-03-03 | Siemens Aktiengesellschaft | Method for continuous magnetic ore separation and/or dressing and related system |
| CN103801449A (en) * | 2013-12-10 | 2014-05-21 | 邹建明 | Red mud magnetofluid separating and recycling method |
| CN106975564A (en) * | 2015-04-27 | 2017-07-25 | 乔风成 | A kind of recirculated water log washer |
| CN207951711U (en) * | 2018-01-25 | 2018-10-12 | 包头钢铁（集团）有限责任公司 | A kind of novel magnetic separation pipe charging gear |
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2019
- 2019-05-20 CN CN201910417957.9A patent/CN110090731B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010031619A1 (en) * | 2008-09-18 | 2010-03-25 | Siemens Aktiengesellschaft | Method for separating rich ore particles from agglomerates which contain said rich ore particles and magnetizable particles attached thereto, especially fe3o4 |
| CA2771797A1 (en) * | 2009-08-24 | 2011-03-03 | Siemens Aktiengesellschaft | Method for continuous magnetic ore separation and/or dressing and related system |
| CN103801449A (en) * | 2013-12-10 | 2014-05-21 | 邹建明 | Red mud magnetofluid separating and recycling method |
| CN106975564A (en) * | 2015-04-27 | 2017-07-25 | 乔风成 | A kind of recirculated water log washer |
| CN207951711U (en) * | 2018-01-25 | 2018-10-12 | 包头钢铁（集团）有限责任公司 | A kind of novel magnetic separation pipe charging gear |
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