CN110498621A - A kind of preparation method of ultra-fine purification concentrate powder magnesite clinker - Google Patents
A kind of preparation method of ultra-fine purification concentrate powder magnesite clinker Download PDFInfo
- Publication number
- CN110498621A CN110498621A CN201910823268.8A CN201910823268A CN110498621A CN 110498621 A CN110498621 A CN 110498621A CN 201910823268 A CN201910823268 A CN 201910823268A CN 110498621 A CN110498621 A CN 110498621A
- Authority
- CN
- China
- Prior art keywords
- magnesite
- ultra
- grinding
- fine
- concentrate powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/102—Preheating, burning calcining or cooling of magnesia, e.g. dead burning
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/6261—Milling
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
- C04B35/62645—Thermal treatment of powders or mixtures thereof other than sintering
- C04B35/6267—Pyrolysis, carbonisation or auto-combustion reactions
-
- 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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
Abstract
The invention discloses a kind of ultra-fine purification concentrate powder magnesite clinker preparation method, the present invention uses magnesite for raw material, is crushed by two-stage and grinding obtains ultra-fine magnesite concentrate powder, directly obtain bulk density >=3.40g/cm by compression moulding and high-temperature calcination3High-density sintered magnesia.Present invention eliminates light-burned equipment required in previous preparation process and techniques, and the preparation process of high-density sintered magnesia is made to become simple and easy, and the production cycle shortens, and equipment investment and production cost are greatly reduced.The present invention is compared with existing high-density sintered magnesia technology, and the production cycle shortens 1/2, and equipment investment reduces 50%, and production cost reduces 40% or more, has good technology and economic value and extensive market application prospect.
Description
Technical field
The present invention relates to refractory material manufacturing technology fields, more particularly to a kind of ultra-fine purification concentrate powder of two-stage that passes through to prepare
The preparation method of high-density sintered magnesia.
Background technique
Primary raw material of the magnesite clinker as basic refractory, bulk density invade performance for the anti-slag of refractory material
There is great influence with elevated temperature strength, directly affect the service life of refractory material.Result of study and production practices show to work as burning
Tie Ti product Mi Du≤3.40g/cm of magnesia3When, the service performance of prepared refractory material significantly improves, and service life is general
One times of density magnesite clinker, and fused magnesite can be substituted and used as refractory raw material.The energy can be not only saved in this way, subtracted
Few environmental pollution, while the production cost of refractory raw material can also be greatly lowered.
Currently, the production technology for preparing high-density sintered magnesia of open report has following two.
The first preparation process is as shown in Figure 1 are as follows: magnesite → primary light-burned light calcined magnesia → hydration process that obtains obtains
It (is detailed in and awards to magnesium hydroxide → secondary light-burned light calcined magnesia → pressure forming → high-temperature calcination → high-density sintered magnesia that obtains
It weighs notification number CN1301228C " a kind of preparation method of magnesite clinker ").
Second of technique is as shown in Figure 2 are as follows: and magnesite → fine grinding and purification by floatation → ultra-fine grinding and grinding → light-burned
To light calcined magnesia → compression moulding → high-temperature calcination.
From above two preparation process it is found that the first preparation process first has to convert hydroxide for magnesite
Magnesium, then high-density sintered magnesia is manufactured using magnesium hydroxide as raw material.Although it is big to prepare bulk density using above-mentioned technique
In 3.40g/cm3High-density sintered magnesia, but due to needing by the conversion of light-burned twice and raw material, production equipment and technique
Process is many and diverse, and production cost is significantly increased.
Second of preparation process is to be obtained using magnesite as raw material by two-stage grinding and purification by floatation ore dressing processing
Height is made using compression moulding and high-temperature calcination by primary light-burned acquisition light calcined magnesia powder in ultra-fine magnesite concentrate powder
Density magnesite clinker.
Compared with the first technique, the simple many of second process shortens the production cycle, cost also substantially under
Drop.But either the first technique or second of technique, it requires to prepare light calcined magnesia by light-burned decomposable process.
And light-burned decomposition magnesite is other than needing light baking kiln and a series of ancillary equipments, it is also necessary to which a large amount of fuel heating light baking kilns are extremely
850~1000 DEG C, to guarantee the complete decomposition of magnesite.Therefore, it is also desirable to a large amount of energy supply.
In general, the shaft furnace or rotary kiln of calcinations and sintering magnesia will configure three light baking kilns simultaneously and just be able to satisfy its production
Demand.And build the shaft furnace of the expense of three light baking kilns and its ancillary equipment and grain magnesite or the construction cost of rotary kiln
Quite.In addition, the light-burned mining fuel cost of magnesite of decomposing is the 50% of shaft furnace grain magnesite.
On the other hand, in calcinations and sintering magnesia, the high-temperature region temperature of calcining kiln is up to 1800~2000 DEG C.By high-temperature region
The heat of discharge is in addition to small part is for other than preheating raw materials for sintering, remaining major part to expel from kiln.Not only cause the energy
Significant wastage, while also making calcining kiln head temperature excessively high, cause service life of equipment to be greatly lowered.
Summary of the invention
The present invention is in order to overcome currently existing technology and process existing during preparing high-density sintered magnesia
Deficiency and defect, propose a kind of to purify the concentrate powder method for preparing high-density sintered magnesia by two-stage extra-fine grinding.This hair
Bright preparation method be using magnesite as raw material, by level-one fine grinding and purification by floatation ore dressing and by second level ultra-fine grinding and
Then high-density sintered magnesia is directly made by compression moulding and high-temperature calcination in grinding.
The preparation method of the ultra-fine purification concentrate powder magnesite clinker of the present invention obtains ultra-fine magnesite using two-stage grinding and crushing
Concentrate powder, repressed molding simultaneously directly obtain high-density sintered magnesia by high-temperature calcination；Processing step is as follows:
1) level-one grinding concentrate powder purifies ore dressing, progress level-one grinding concentrate powder purification ore dressing processing first, using magnesite
Mine is raw material, and the magnesite is levigate to 200 mesh, i.e. fineness is 74 μm of magnesite powders；Wherein, -200 mesh magnesite powder content
>=75%, the magnesite concentrate powder of purity needed for obtaining；
2) second level ultra-fine grinding and grinding obtain the further ultra-fine grinding of magnesite concentrate powder selected by above-mentioned level-one and levigate
Obtain the ultra-fine magnesite concentrate powder of fineness≤4 μm；
3) compression moulding, it is under the pressure of >=300MPa that above-mentioned second level ultra-fine grinding and grinding is obtained using press
The ultra-fine magnesite concentrate powder compression moulding；
4) high-temperature calcination calcines the ultra-fine magnesite concentrate of the compression moulding 2~3 hours at 1800~2000 DEG C,
Make it that can be done directly the complete decomposable process of magnesite in high-temperature burning process；Or in high-temperature burning process sufficiently
The complete decomposition of magnesite is completed using the waste heat on calcining kiln top, to obtain bulk density 3.40g/cm3~3.50g/
cm3High-density sintered magnesia product.
The preferred wet flotation purification ore dressing processing of the present invention, i.e., carry out wet flotation in the flotation cell of wet flotation equipment
Ore dressing is purified, the magnesite concentrate powder of purity needed for obtaining.
The fineness of the ultra-fine magnesite concentrate powder of the present invention can further be refined to 1 μm~3 μm, and further make high-density sintered
The bulk density of magnesia product reaches 3.42g/cm3~3.50g/cm3。
The present invention in grinding and using grinder and can be crushed to the ultra-fine grinding of fineness≤4 μm miberal powder when ultra-fine grinding
Equipment.The research of super-pine crush equipment can be used airflow milling, high speed machine impact grinding, agitating ball mill, grinding machine for cutting charge into pieces, be sanded
Machine, vibrator, rotary-tube type ball mill, planetary ball mill, tower mill, whirlwind autogenous tumbling mill, high-pressure roller mill, high pressure water
The research of super-pine crush equipment such as jet mill or colloid mill carry out ultra-fine grinding and grinding.Calcine technology of the invention can be used shaft furnace or
The equipment such as rotary kiln carry out.
Preparation method of the invention is due to and by second level ultra-fine grinding and grinding by level-one grinding and purification by floatation
Mill obtains the ultra-fine magnesite concentrate powder of fineness≤4 μm, using directly carrying out high-temperature calcination after compression moulding, and in high temperature
The complete decomposition of magnesite is done directly in calcination process, to directly obtain high-density sintered magnesia product.Therefore complete
The light-burned equipment and light-burned technique for decomposing magnesite are eliminated, so that the entire process flow of magnesite clinker becomes very
Simply, the production cycle is substantially reduced.Simultaneously as saving light-burned equipment, reduces sintering process process, not only save
Equipment and place, also energy conservation and environmental protection, so that production cost is greatly lowered.
The present invention can also make full use of the waste heat on calcining kiln top to complete the complete of magnesite in high-temperature burning process
It is complete to decompose, it can not only guarantee the complete decomposition of magnesite, and substantially reduce the discharge heat of waste heat, extend calcining kiln
Service life.
Detailed description of the invention
Fig. 1 is the first prior art preparation process flow diagram；
Fig. 2 is second of prior art preparation process flow diagram；
Fig. 3 is preparation process flow schematic diagram of the invention.
Specific embodiment
Referring to the drawings and exemplary embodiment the present invention is described in detail.It is shown in the following drawings
Preferred embodiment, these preferred embodiments do not limit other embodiments of the present invention.
Below in conjunction with attached drawing and exemplary embodiment, the present invention is described in detail.
Referring to Fig. 3, the present invention be directed to exist in the prior art to prepare magnesite clinker and need to first pass through light-calcined magnesite system
Light calcined magnesia is obtained, then prepares many and diverse technical process of high-density sintered magnesia with high-temperature burning process through forming, finds out production
Deficiency and defect in the process, and proposed a kind of high by the ultra-fine purification concentrate powder preparation of two-stage by repeatedly improving and testing
The preparation method of density magnesite clinker.
Result of study shows that the magnesite in China belongs to coarse-crystalline mine system, and the MgO generated after decomposing remains carbonic acid
Magnesium, i.e. MgCO3" pseudomorphic crystal " structure.This " pseudomorphic crystal " structure hinders the sintering of MgO.And work is produced in traditional magnesite clinker
In skill, light-burned process is set primarily to destroying this " pseudomorphic crystal " structure, while increasing the activity of magnesia and at parison
The compacted density of body to improve the sintering character of magnesia, and then obtains the high-density sintered magnesia of densification.
Inventor has obtained unexpected experimental result by largely research and experiment, i.e. magnesite powder passes through ultra-fine
It crushes and grinding can be such that " pseudomorphic crystal " structure of magnesium carbonate is destroyed or partial destruction, together when its fineness reaches≤4 μm
When ultra-fine grinding and grinding powder specific-surface area detection can also be made to increase, thus obtain for magnesia be sintered needed for energy supper fine refined
Miberal powder.
The unexpected experimental result, it is only necessary to by ultra-fine grinding and grind and purify ore dressing, obtain fineness≤4
μm ultra-fine magnesite concentrate powder, high-temperature calcination is directly carried out after compression moulding, and water chestnut is done directly in high-temperature burning process
High-density sintered magnesia product is decomposed completely and directly obtained to magnesium mine, to establish science to fully phase out light-burned process
Theoretical basis.
Meanwhile passing through many experiments and improved as a result, the present invention can also make full use of in high-temperature burning process forges
The waste heat on firing top completes the complete decomposition of magnesite.Because the waste heat supply temperature on calcining kiln top is very high, can not only guarantee
The complete decomposition of magnesite, and the discharge heat of waste heat is substantially reduced, have to the long-time service of calcining kiln and protects well
Shield effect.
Above two experimental result of the invention sufficiently demonstrates the practical feasibility of the present invention technically, and in reality
The desired technical effect reached of the invention is reached in the operation of border.
On the basis of the studies above and experiment, the present invention it is innovative to propose prepared by a kind of ultra-fine purification concentrate powder highly dense
The preparation method of magnesite clinker is spent, i.e., first with grinding machine by the levigate magnesite powder to 200 mesh i.e. 74 μm of magnesite；Wherein ,-
200 mesh magnesite powder content >=75%；After level-one grinds concentrate powder and wet flotation purification ore dressing, purity needed for obtaining
Magnesite concentrate powder；Using second level ultra-fine grinding and grinding, the ultra-fine magnesite concentrate powder of fineness≤4 μm is obtained.Because what is screened
Ultra-fine magnesite concentrate powder " pseudomorphic crystal " structure has been destroyed, while the ultra-fine magnesite concentrate powder of fineness≤4 μm increases it and compares table
Area substantially increases the densification sintering performance of magnesite.Therefore, it is compressed into type at pressure >=300MPa, then passes through
1800~2000 DEG C high-temperature calcination 2~3 hours, can be obtained bulk density 3.40g/cm3~3.50g/cm3It is high-density sintered
Magnesia product.Therefore, in the technique for preparing high-density sintered magnesia, it is no longer necessary to light-burned equipment and light-burned process.
It during the preparation process, can be easily since the viscosity of magnesite powder is small and can use wet grinding
It is connected with upper track wet flotation technique, to make ultra-fine grinding and process of lapping of the invention become simpler easy, both
It is water-saving and environmentally friendly.
Airflow milling can be used in research of super-pine crush equipment of the invention, high speed machine impact grinding, agitating ball mill, grinding are delaminated
Machine, sand mill, vibrator, rotary-tube type ball mill, planetary ball mill, tower mill, whirlwind autogenous tumbling mill, high pressure roller mill
The research of super-pine crush equipment such as machine, high-pressure water jet grinding machine or colloid mill.Shaft furnace or rotary kiln etc. can be used in high-temperature calcination of the invention
Equipment.
By the present invention in that it is raw material that obtained ultra-fine magnesite concentrate powder is crushed and ground with two-stage, by compression moulding
High-density sintered magnesia is directly obtained with high-temperature calcination, eliminates required light-burned equipment and process in previous preparation process,
The preparation process of high-density sintered magnesia is set to become simple and easy, the production cycle shortens, and equipment investment and production cost are big
Width reduces.It is prepared compared with high-density sintered magnesia technology with existing, the production cycle shortens 1/2, and equipment investment reduces
50% or so, production cost reduces 40% or more.
Embodiment 1
Referring to Fig. 3, the present embodiment uses the low-grade magnesite of domestic Dashiqiao production for raw material, and main mine substance is water chestnut
Magnesium mine, while also containing other minerals such as dolomite and a small amount of talcum.Its primary chemical composition is as shown in table 1.
1 main chemical compositions of table composition
| Component | MgO | SiO2 | CaO | Fe2O3 | Al2O3 | It is other |
| % | 46.56 | 1.89 | 0.67 | 0.31 | 0.05 | 50.52 |
Level-one grinding concentrate powder purification ore dressing processing is carried out first, it is using common grinding machine that magnesite raw material is levigate to 200
The magnesite powder that mesh, i.e. granularity are 74 μm；Wherein, -200 mesh magnesite powder contents are 82%.Levigate magnesite powder is put into
Wet flotation is carried out in flotation cell and purifies ore dressing, obtains magnesite concentrate powder, and primary chemical composition is as shown in table 2.
2 magnesite concentrate powder main chemical compositions of table composition
| Component | MgO | SiO2 | CaO | Fe2O3 | Al2O3 | It is other |
| % | 47.35 | 0.01 | 0.42 | 0.15 | 0.03 | 52.04 |
The main chemical compositions of table 2 form display, and the MgO component content by magnesite concentrate powder after purification ore dressing processing is bright
It is aobvious to improve, 47.35% is increased to from 46.56%.
Second level ultra-fine grinding and grinding are carried out to magnesite concentrate powder selected by above-mentioned level-one technique.Using agitating ball mill
To the concentrate powder further progress ultra-fine grinding of level-one magnesite and grinding, the ultra-fine magnesite concentrate powder that fineness is 2 μm~3 μm is obtained,
Then by ultra-fine magnesite concentrate powder compression moulding under the pressure of 350MPa；The ultra-fine magnesite concentrate of compression moulding is put into revolution
Kiln is calcined 2.5 hours at 1900 DEG C, the decomposable process of magnesite is done directly in high-temperature burning process, then downlink again
Further sintering makes its densification after into high-temperature region, and directly obtaining bulk density is 3.43g/cm3High-density sintered magnesia.
Embodiment 2
Referring to Fig. 3, for the present embodiment equally using the low-grade magnesite of embodiment 1 as raw material, preparation step is as follows:
1) using grinding machine that magnesite is levigate to 200 mesh magnesite powders, progress level-one grinding concentrate powder purification ore dressing is handled,
Wherein, -200 mesh magnesite powder content 85%；Magnesite powder after levigate carries out wet flotation purification ore dressing in flotation cell, obtains
Obtain the magnesite concentrate powder that MgO is 47.21%；
2) second level ultra-fine grinding and grinding are carried out to level-one magnesite concentrate powder, using high speed machine impact grinding to level-one magnesite
Concentrate powder carries out ultra-fine grinding and grinding, obtains the ultra-fine magnesite concentrate powder that fineness is 1 μm~2 μm；
3) use press at 400MPa by the ultra-fine magnesite concentrate powder compression moulding of second level；
4) the ultra-fine magnesite concentrate of compression moulding utilizes shaft furnace top height through calcining 2.5 hours at 1950 DEG C in shaft furnace
The waste heat that warm area is released is done directly its decomposable process, enters back into high-temperature region and carries out densification sintering, obtains bulk density
3.45g/cm3High-density sintered magnesia product.
Embodiment 3
Embodiment 3 is ground to 200 mesh magnesites using the low-grade magnesite of embodiment 1 as raw material, by magnesite progress level-one
Miberal powder, -200 mesh magnesite powder contents 88%；Magnesite powder after levigate carries out wet flotation purification ore dressing in flotation cell, obtains
Obtain the magnesite concentrate powder of MgO ingredient 48.03%；
Second level ultra-fine grinding and grinding are carried out to level-one magnesite concentrate powder using airflow milling, obtaining fineness is 1 μm~2 μm
Ultra-fine magnesite concentrate powder；At 380MPa the ultra-fine magnesite concentrate powder of compression moulding in shaft furnace through being calcined 3 hours at 1850 DEG C,
The decomposable process of magnesite is done directly in high-temperature burning process, the densification sintering through high-temperature region obtains bulk density
3.50g/cm3High-density sintered magnesia.
Above three embodiments are in using ultra-fine grinding grinding and wet flotation purification ore dressing process, twice wet process work
Sequence is mutually linked, and has been saved water source and has been achieved the purpose that i.e. environmental protection free from environmental pollution again.
The ultra-fine magnesite concentrate powder fineness that above three embodiments use makes the " false of magnesium carbonate between 1 μm~3 μm
It is brilliant " structure is destroyed, while increasing the specific surface area of powder, and the bulk density of prepared high-density sintered magnesia exists
3.42g/cm3More than, final purity reaches 98.22%.It is being used with above-specified high density magnesite clinker refractory material produced
Good service performance and service life are embodied in the process, and the service life is enhanced about more than once than existing refractory product, but it sets
Standby investment and production cost are but only 50% or so of the prior art.
By above-mentioned implementation process and implementation result it will be evident that present invention is especially suited for by processing low-grade water chestnut
Magnesium mine can effectively improve the cost performance of product to obtain the high-density sintered magnesia of high added value, have good technology and
Economic value and extensive market application prospect.
The above is only the preferred embodiment of the present invention, and the limitation not to other embodiment of the present invention.For this
For the those of ordinary skill of technical field, various improvement can also be made without departing from the principle of the present invention, these
Improvement also should be considered as protection scope of the present invention.
Claims (10)
1. a kind of preparation method of ultra-fine purification concentrate powder magnesite clinker, which is characterized in that obtained using two-stage grinding and crushing
Ultra-fine magnesite concentrate powder, repressed molding are simultaneously directly obtained high-density sintered magnesia by high-temperature calcination, are walked using following technique
It is rapid:
1) level-one grinding concentrate powder purify ore dressing, first progress level-one grinding concentrate powder purification ore dressing processing, use magnesite for
Raw material, the magnesite is levigate to 200 mesh i.e. 74 μm magnesite powder；Wherein, -200 mesh magnesite powder content >=75%, passes through
The magnesite concentrate powder of purity needed for ore dressing obtains；
2) second level ultra-fine grinding and grinding obtain thin the further ultra-fine grinding of magnesite concentrate powder and grinding selected by above-mentioned level-one
The ultra-fine magnesite concentrate powder of≤4 μm of degree；
3) ultra-fine magnesite concentrate powder selected by above-mentioned second level is pressed under the pressure of >=300MPa by compression moulding using press
Type；
4) high-temperature calcination calcines the ultra-fine magnesite concentrate of the compression moulding 2~3 hours at 1800~2000 DEG C, obtains
Bulk density 3.40g/cm3~3.50g/cm3High-density sintered magnesia product.
2. preparation method according to claim 1, which is characterized in that the purification ore dressing is that wet flotation purifies at ore dressing
Reason.
3. preparation method according to claim 1, which is characterized in that the fineness of the ultra-fine magnesite concentrate powder is 1 μm~3
μm。
4. according to claim 1 to 3 or described in any item preparation methods, which is characterized in that in the high-temperature burning process
It is done directly the decomposable process of magnesite.
5. according to claim 1 to 3 or described in any item preparation methods, which is characterized in that in the high-temperature burning process
The decomposable process of magnesite is done directly using the waste heat on calcining kiln top.
6. preparation method according to claim 1, which is characterized in that the bulk density of the high-density sintered magnesia product
For 3.42g/cm3~3.50g/cm3。
7. preparation method according to claim 2, which is characterized in that the wet flotation purification ore dressing processing is in flotation cell
Interior progress.
8. preparation method according to claim 1, which is characterized in that it is described grinding and ultra-fine grinding can be used grinder with
And the research of super-pine crush equipment of fineness≤4 μm miberal powder can be crushed to.
9. preparation method according to claim 8, which is characterized in that airflow milling, height can be used in the research of super-pine crush equipment
Fast mechanical shock mill, agitating ball mill, grinding machine for cutting charge into pieces, sand mill, vibrator, rotary-tube type ball mill, planetary ball
Grinding machine, tower mill, whirlwind autogenous tumbling mill, high-pressure roller mill, high-pressure water jet grinding machine or colloid mill.
10. preparation method according to claim 1, which is characterized in that shaft furnace or rotary kiln device can be used in the calcining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910823268.8A CN110498621B (en) | 2019-09-02 | 2019-09-02 | Preparation method of superfine purified concentrate powder sintered magnesia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910823268.8A CN110498621B (en) | 2019-09-02 | 2019-09-02 | Preparation method of superfine purified concentrate powder sintered magnesia |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110498621A true CN110498621A (en) | 2019-11-26 |
| CN110498621B CN110498621B (en) | 2021-11-05 |
Family
ID=68590956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910823268.8A Active CN110498621B (en) | 2019-09-02 | 2019-09-02 | Preparation method of superfine purified concentrate powder sintered magnesia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110498621B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111362670A (en) * | 2020-03-02 | 2020-07-03 | 秦皇岛首钢黑崎耐火材料有限公司 | Environment-friendly carbon-free dry material |
| CN111925191A (en) * | 2020-07-13 | 2020-11-13 | 辽宁东和新材料股份有限公司 | Method for producing high-density high-purity sintered magnesia by using low-grade magnesite |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3712599A (en) * | 1971-03-15 | 1973-01-23 | Dresser Ind | Method of producing high density refractory grain from natural magnesite |
| CN1150131A (en) * | 1996-09-05 | 1997-05-21 | 辽宁镁矿耐火材料公司 | Method for producing high-purity dense macrocrystalline sintered magnesia |
| CN102351441A (en) * | 2011-07-21 | 2012-02-15 | 辽宁科技大学 | Method for producing dead-burned magnesia through one-step calcination of magnesite tailings |
| CN102515213A (en) * | 2011-12-19 | 2012-06-27 | 北京科技大学 | Integrated utilization method of low grade magnesite |
| CN103406196A (en) * | 2013-08-16 | 2013-11-27 | 辽宁东和耐火材料集团有限公司 | Multi-stage segmental ore-dressing, purifying, and comprehensive utilization method for low-grade magnesite |
| CN104003742A (en) * | 2014-06-11 | 2014-08-27 | 辽宁东和耐火材料集团有限公司 | Method for preparing magnesium-silicon sand by high-silicon magnesite tailings |
| CN104072161A (en) * | 2014-06-11 | 2014-10-01 | 辽宁东和耐火材料集团有限公司 | Method for preparing calcium and magnesium sand by using high-silicon magnesite tailings |
| CN104108733A (en) * | 2014-07-07 | 2014-10-22 | 新疆大正过程环保科技有限公司 | High-purity magnesia wet-pyrogenic integrated device and method for preparing high-purity magnesia |
| CN108821750A (en) * | 2018-07-10 | 2018-11-16 | 武汉科技大学 | A kind of magnesite clinker and preparation method thereof with micro-nano composite pore structural |
| CN108863114A (en) * | 2018-07-06 | 2018-11-23 | 沈阳化工大学 | A kind of method that the light-burned process waste heat of magnesite recycles |
| CN109206024A (en) * | 2018-11-30 | 2019-01-15 | 嘉晨集团有限公司 | A kind of preparation method producing highly-purity magnesite using low-grade magnesite as raw material |
| CN109437607A (en) * | 2019-01-11 | 2019-03-08 | 于景坤 | A kind of preparation method of high-density sintered magnesia |
| CN109650753A (en) * | 2019-02-01 | 2019-04-19 | 东北大学 | A method of high density magnesia is prepared using magnesite discharge plasma sintering |
| CN110002772A (en) * | 2019-04-16 | 2019-07-12 | 大连地拓环境科技有限公司 | A kind of low-grade magnesite prepares method of magnesium oxide |
| CN110078393A (en) * | 2019-05-15 | 2019-08-02 | 盐城工学院 | A kind of method of low temperature preparation sulphur calcium silicates-sulphate aluminium cement |
-
2019
- 2019-09-02 CN CN201910823268.8A patent/CN110498621B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3712599A (en) * | 1971-03-15 | 1973-01-23 | Dresser Ind | Method of producing high density refractory grain from natural magnesite |
| CN1150131A (en) * | 1996-09-05 | 1997-05-21 | 辽宁镁矿耐火材料公司 | Method for producing high-purity dense macrocrystalline sintered magnesia |
| CN102351441A (en) * | 2011-07-21 | 2012-02-15 | 辽宁科技大学 | Method for producing dead-burned magnesia through one-step calcination of magnesite tailings |
| CN102515213A (en) * | 2011-12-19 | 2012-06-27 | 北京科技大学 | Integrated utilization method of low grade magnesite |
| CN103406196A (en) * | 2013-08-16 | 2013-11-27 | 辽宁东和耐火材料集团有限公司 | Multi-stage segmental ore-dressing, purifying, and comprehensive utilization method for low-grade magnesite |
| CN104072161A (en) * | 2014-06-11 | 2014-10-01 | 辽宁东和耐火材料集团有限公司 | Method for preparing calcium and magnesium sand by using high-silicon magnesite tailings |
| CN104003742A (en) * | 2014-06-11 | 2014-08-27 | 辽宁东和耐火材料集团有限公司 | Method for preparing magnesium-silicon sand by high-silicon magnesite tailings |
| CN104108733A (en) * | 2014-07-07 | 2014-10-22 | 新疆大正过程环保科技有限公司 | High-purity magnesia wet-pyrogenic integrated device and method for preparing high-purity magnesia |
| CN108863114A (en) * | 2018-07-06 | 2018-11-23 | 沈阳化工大学 | A kind of method that the light-burned process waste heat of magnesite recycles |
| CN108821750A (en) * | 2018-07-10 | 2018-11-16 | 武汉科技大学 | A kind of magnesite clinker and preparation method thereof with micro-nano composite pore structural |
| CN109206024A (en) * | 2018-11-30 | 2019-01-15 | 嘉晨集团有限公司 | A kind of preparation method producing highly-purity magnesite using low-grade magnesite as raw material |
| CN109437607A (en) * | 2019-01-11 | 2019-03-08 | 于景坤 | A kind of preparation method of high-density sintered magnesia |
| CN109650753A (en) * | 2019-02-01 | 2019-04-19 | 东北大学 | A method of high density magnesia is prepared using magnesite discharge plasma sintering |
| CN110002772A (en) * | 2019-04-16 | 2019-07-12 | 大连地拓环境科技有限公司 | A kind of low-grade magnesite prepares method of magnesium oxide |
| CN110078393A (en) * | 2019-05-15 | 2019-08-02 | 盐城工学院 | A kind of method of low temperature preparation sulphur calcium silicates-sulphate aluminium cement |
Non-Patent Citations (1)
| Title |
|---|
| 郑水林: "《非金属矿超细粉碎技术与装备》", 31 August 2016, 中国建材工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111362670A (en) * | 2020-03-02 | 2020-07-03 | 秦皇岛首钢黑崎耐火材料有限公司 | Environment-friendly carbon-free dry material |
| CN111925191A (en) * | 2020-07-13 | 2020-11-13 | 辽宁东和新材料股份有限公司 | Method for producing high-density high-purity sintered magnesia by using low-grade magnesite |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110498621B (en) | 2021-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109437607A (en) | A kind of preparation method of high-density sintered magnesia | |
| CN102826827B (en) | A kind of with ceramic polished slag be major ingredient sintering pitchers brick and production method thereof | |
| CN101696112A (en) | Method for preparing medium and high-aluminum abrasion-resistant ceramic product by using rolling rod waste | |
| CN103276294B (en) | Method for rapidly reducing nickel slag to produce iron-nickel-copper alloy powder in kiln under reducing atmosphere | |
| CN106478033A (en) | A kind of production technology of autoclaved lime-sand brick | |
| CN101830707A (en) | Method for producing baked bricks from alumina red mud | |
| CN110498621A (en) | A kind of preparation method of ultra-fine purification concentrate powder magnesite clinker | |
| CN110981536A (en) | Method and system for preparing steel slag ceramsite | |
| CN102765931B (en) | Method for preparing ceramic material utilizing magnetic separation tail sludge from steel slag wet process | |
| CN106396624B (en) | A kind of gangue proppant and preparation method thereof | |
| CN112159131A (en) | Road silicate cement clinker taking carbide slag as raw material and preparation method thereof | |
| CN109590072A (en) | A kind of anode material of lithium battery waste and old baking sagger smashing and grinding equipment | |
| CN109970372A (en) | A kind of method of mechanochemical method low temperature preparation belite sulphate aluminium cement | |
| CN112341218B (en) | Method for preparing high-performance magnesium-zirconium composite ceramic tile by spark plasma sintering | |
| CN104072161B (en) | After a kind of magnesite choosing, mine tailing prepares the method for calcium magnesia sand | |
| CN102092969B (en) | Special concrete clinker without limerock burdening and production method of special concrete clinker | |
| CN102618685B (en) | Burning method iron ore coke-free ironmaking and a cement clinker production technology is ground in energy-conserving and environment-protective two | |
| CN103553560B (en) | A kind of olive stone ore prepares the method for forsterite | |
| CN113800544B (en) | Method and system for preparing high Bai Gaochun aluminum hydroxide by utilizing solid waste | |
| CN107793132A (en) | Ceramic Tiles based on ceramic polished slag and preparation method thereof | |
| CN101913892B (en) | Method for producing homogenized alumina | |
| CN211445550U (en) | System for preparing steel slag ceramsite | |
| CN205443069U (en) | Adopt magnesite ore crushing production magnesite clinker's device | |
| CN104692679A (en) | Preparation method for cement clinker | |
| CN107337359A (en) | A kind of lime stone slag and stone powder waste material renovation process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |