CN107793160A - A kind of production method for being homogenized light calcined magnesia - Google Patents
A kind of production method for being homogenized light calcined magnesia Download PDFInfo
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- CN107793160A CN107793160A CN201710903050.4A CN201710903050A CN107793160A CN 107793160 A CN107793160 A CN 107793160A CN 201710903050 A CN201710903050 A CN 201710903050A CN 107793160 A CN107793160 A CN 107793160A
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- magnesite
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- muck
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- 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
- C04B35/043—Refractories from grain sized mixtures
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- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention relates to a kind of production method for being homogenized light calcined magnesia, it is raw material using discarded low-grade magnesite, magnesite muck, magnesite milltailings, by the pre-treatment of raw material, mixes homogenizing, high pressure balling-up, drying, roasting technique production homogenizing light calcined magnesia.Raw material is crushed, particle diameter≤5mm low-grade magnesite, particle diameter≤5mm magnesite muck, magnesite milltailings are proportionally added into ball mill or tube mill and wear into≤0.088mm powder altogether；By the raw material of pre-treatment, additional bonding agent and water mix 1~10 minute in strength puddle mixer；Bonding agent is spent pulping liquor or magnesium chloride solution；Mix the material being homogenized and be pressed into homogenizing ball or homogenizing elliptical shape ball through strength ball press；Ball or homogenizing elliptical shape ball will be homogenized after drying in shaft furnace or rotary kiln, reflection roasting in kilns.The present invention can production quality uniformly, the homogenizing light calcined magnesia of stable performance.
Description
Technical field
It is particularly a kind of to utilize discarded low-grade magnesite, magnesite muck, water chestnut the present invention relates to refractory material preparation
The method of magnesium ore deposit milltailings production homogenizing light calcined magnesia.
Background technology
Light calcined magnesia is the maximum magnesian of yield, and China's light calcined magnesia annual capacity is more than 10,000,000 tons, extensively
General to be applied to the fields such as metallurgical, building materials and national defence, while it or the important raw material of industry, product has high-grade fire proofed wood downstream
Material, information material and chemical products etc..Traditional backward technology is still continued to use in the production of existing light calcined magnesia, it can only use 20~
300mm high-quality high-grade magnesite lump ore resource, a large amount of low-grade magnesites (accounting for 50% of gross recovery or so), exploitation and
Caused mine tailing after caused magnesite muck in shattering process (≤20mm muck ratio up to more than 30%), magnesite ore dressing
(account for ore dressing amount 30~50%) be used to fill out ditch or pave the way, or even go out of use, and cause the serious wasting of resources and environmental pollution.
In addition, different sources, different mining areas, the magnesite of different grades its chemical composition, mineral composition, structural behaviour are different, thus it is raw
Produce that obtained light calcined magnesia product composition, structure are uneven, and quality, performance are unstable, its application is received very big limit
System.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of production method for being homogenized light calcined magnesia, overcome tradition
The light calcined magnesia product composition of method production, structure are uneven, quality, the problem of performance is unstable, can production quality uniformly,
The homogenizing light calcined magnesia of stable performance.
To achieve the above object, the present invention is realized using following technical scheme：
A kind of production method for being homogenized light calcined magnesia, comprises the following steps：
(1) raw material
Low-grade magnesite, particle diameter≤20mm magnesite muck, magnesite milltailings；Low-grade magnesite MgO contains
Amount 35~45%；Magnesite muck content of MgO >=45%；Magnesite milltailings content of MgO >=45%；
(2) pre-treatment of raw material
Low-grade magnesite is broken into≤5mm particle diameters through jaw crusher, gyratory crusher or kibbler roll；
Magnesite muck is broken into≤5mm particle diameters through gyratory crusher or kibbler roll；
By particle diameter≤5mm low-grade magnesite, particle diameter≤5mm magnesite muck, magnesite milltailings in proportion
Add in ball mill or tube mill and wear into≤0.088mm powder altogether；Raw material weight proportioning of soup processed is：Low-grade magnesite 10~40
Part；20~80 parts of magnesite muck；10~40 parts of magnesite milltailings；
(3) homogenizing is mixed
By the raw material of pre-treatment, additional bonding agent and water mix 1~10 minute in strength puddle mixer；Bonding agent is paper
Pulp waste or magnesium chloride solution, 1~9 part of bonding agent addition, the addition of water is 1~9 part；
(4) high pressure balling-up
Mix homogenizing ball or homogenizing elliptical shape ball that the material being homogenized is pressed into 30~60mm through strength ball press；
(5) dry
The homogenizing ball suppressed or homogenizing elliptical shape ball are dried 6~24 hours at 110~130 DEG C；
(6) it is calcined
By dried homogenizing ball or homogenizing elliptical shape ball in shaft furnace or rotary kiln, reflection roasting in kilns, sintering temperature 700
~900 DEG C, soaking time is 30~180 minutes.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) it is raw material using discarded low-grade magnesite, magnesite muck, magnesite milltailings, by raw material
Pre-treatment, mix homogenizing, high pressure balling-up, drying, roasting technique production homogenizing light calcined magnesia.
(2) instant invention overcomes the light calcined magnesia product composition of produced in conventional processes, structure are uneven, quality, performance
The problem of unstable, can production quality uniformly, the homogenizing light calcined magnesia of stable performance.The homogenizing light calcined magnesia activity of production
Citric acid Coloring Time be can reach less than 60 seconds.
(3) this method can be homogenized grade and activity of light calcined magnesia etc. according to the market demand and product purpose artificial adjustment
Performance, produce predetermined grade, the high-quality homogenizing light calcined magnesia of activity.
(4) present invention is raw material using discarded low-grade magnesite, magnesite muck, magnesite milltailings, makes water chestnut
Magnesium resource is fully used, and can improve magnesite resource utilization rate 30~40% or so.After the present invention is implemented, will have 600
Ten thousand tons of low-grade magnesites, magnesite muck, magnesite tailings are fully utilized, and can save 3,000,000,000 yuan of expense of raw materials, reduce
Production cost, environment is protected, improve economic benefit and social benefit.
Embodiment
With reference to embodiment, the present invention is further described：
The present invention will be described in detail for following examples.These embodiments are only that preferred embodiment of the invention is entered
Row description, is not limited the scope of the present invention.
Embodiment 1
A kind of production method for being homogenized light calcined magnesia, comprises the following steps：
(1) raw material
Low-grade magnesite, particle diameter≤20mm magnesite muck, magnesite milltailings；Low-grade magnesite MgO contains
Amount 35~40%；Magnesite muck content of MgO >=45%；Magnesite milltailings content of MgO >=45%；
(2) pre-treatment of raw material
Low-grade magnesite is broken into≤5mm particle diameters through jaw crusher, gyratory crusher or kibbler roll；By water chestnut
Magnesium ore deposit muck is broken into≤5mm particle diameters through gyratory crusher or kibbler roll；By particle diameter≤5mm low-grade magnesite, grain
Footpath≤5mm magnesite muck, magnesite milltailings is proportionally added into ball mill or tube mill wears into≤0.088mm altogether
Powder；Raw material weight proportioning of soup processed is：30 parts of low-grade magnesite；50 parts of magnesite muck；20 parts of magnesite milltailings；
(3) homogenizing is mixed
By the raw material of pre-treatment, the spent pulping liquor and 5 parts of water for adding 5 parts mix 5 minutes in strength puddle mixer；
(4) high pressure balling-up
Mix the homogenizing ball that the material being homogenized is pressed into 30mm through strength ball press；
(5) dry
The homogenizing ball suppressed is dried 10 hours at 130 DEG C；
(6) it is calcined
By dried homogenizing ball in perpendicular roasting in kilns, sintering temperature is 800 DEG C, and soaking time is 60 minutes.
Embodiment 2
A kind of production method for being homogenized light calcined magnesia, comprises the following steps：
(1) raw material
Low-grade magnesite, particle diameter≤20mm magnesite muck, magnesite milltailings；Low-grade magnesite MgO contains
Amount 38~42%；Magnesite muck content of MgO >=45%；Magnesite milltailings content of MgO >=45%；
(2) pre-treatment of raw material
Low-grade magnesite is broken into≤5mm particle diameters through jaw crusher, gyratory crusher or kibbler roll；By water chestnut
Magnesium ore deposit muck is broken into≤5mm particle diameters through gyratory crusher or kibbler roll；By particle diameter≤5mm low-grade magnesite, grain
Footpath≤5mm magnesite muck, magnesite milltailings is proportionally added into ball mill or tube mill wears into≤0.088mm altogether
Powder；Raw material weight proportioning of soup processed is：20 parts of low-grade magnesite；60 parts of magnesite muck；20 parts of magnesite milltailings；
(3) homogenizing is mixed
By the raw material of pre-treatment, the magnesium chloride solution and 5 parts of water for adding 4 parts mix 3 minutes in strength puddle mixer；
(4) high pressure balling-up
Mix the material being homogenized and be pressed into the homogenizing elliptical shape ball that two axial lengths are respectively 50mm and 30m through strength ball press；
(5) dry
The homogenizing elliptical shape ball suppressed is dried 12 hours at 110 DEG C；
(6) it is calcined
By dried homogenizing elliptical shape ball in perpendicular roasting in kilns, sintering temperature is 700 DEG C, and soaking time is 90 minutes.
Embodiment 3
A kind of production method for being homogenized light calcined magnesia, comprises the following steps：
(1) raw material
Low-grade magnesite, particle diameter≤20mm magnesite muck, magnesite milltailings；Low-grade magnesite MgO contains
Amount 35~42%；Magnesite muck content of MgO >=45%；Magnesite milltailings content of MgO >=45%；
(2) pre-treatment of raw material
Low-grade magnesite is broken into≤5mm particle diameters through jaw crusher, gyratory crusher or kibbler roll；By water chestnut
Magnesium ore deposit muck is broken into≤5mm particle diameters through gyratory crusher or kibbler roll；By particle diameter≤5mm low-grade magnesite, grain
Footpath≤5mm magnesite muck, magnesite milltailings is proportionally added into ball mill or tube mill wears into≤0.088mm altogether
Powder；Raw material weight proportioning of soup processed is：20 parts of low-grade magnesite；70 parts of magnesite muck；10 parts of magnesite milltailings；
(3) homogenizing is mixed
By the raw material of pre-treatment, the spent pulping liquor and 3 parts of water for adding 4 parts mix 4 minutes in strength puddle mixer；
(4) high pressure balling-up
Mix the homogenizing ball that the material being homogenized is pressed into diameter 40mm through strength ball press；
(5) dry
The homogenizing ball suppressed is dried 14 hours at 120 DEG C；
(6) it is calcined
By dried homogenizing ball in revolution roasting in kilns, sintering temperature is 900 DEG C, and soaking time is 30 minutes.
Embodiment 4
A kind of production method for being homogenized light calcined magnesia, comprises the following steps：
(1) raw material
Low-grade magnesite, particle diameter≤20mm magnesite muck, magnesite milltailings；Low-grade magnesite MgO contains
Amount 40~45%；Magnesite muck content of MgO >=45%；Magnesite milltailings content of MgO >=45%；
(2) pre-treatment of raw material
Low-grade magnesite is broken into≤5mm particle diameters through jaw crusher, gyratory crusher or kibbler roll；By water chestnut
Magnesium ore deposit muck is broken into≤5mm particle diameters through gyratory crusher or kibbler roll；By particle diameter≤5mm low-grade magnesite, grain
Footpath≤5mm magnesite muck, magnesite milltailings is proportionally added into ball mill or tube mill wears into≤0.088mm altogether
Powder；Raw material weight proportioning of soup processed is：10 parts of low-grade magnesite；80 parts of magnesite muck；10 parts of magnesite milltailings；
(3) homogenizing is mixed
By the raw material of pre-treatment, the magnesium chloride solution and 3 parts of water for adding 5 parts mix 3 minutes in strength puddle mixer；
(4) high pressure balling-up
Mix the material being homogenized and be pressed into the homogenizing elliptical shape ball that two axial lengths are respectively 60mm and 40m through strength ball press；
(5) dry
The homogenizing elliptical shape ball suppressed is dried 16 hours at 120 DEG C；
(6) it is calcined
By dried homogenizing elliptical shape ball in perpendicular roasting in kilns, sintering temperature is 750 DEG C, and soaking time is 80 minutes.
Claims (1)
1. a kind of production method for being homogenized light calcined magnesia, it is characterised in that comprise the following steps：
(1) raw material
Low-grade magnesite, particle diameter≤20mm magnesite muck, magnesite milltailings；Low-grade magnesite content of MgO 35
~45%；Magnesite muck content of MgO >=45%；Magnesite milltailings content of MgO >=45%；
(2) pre-treatment of raw material
Low-grade magnesite is broken into≤5mm particle diameters through jaw crusher, gyratory crusher or kibbler roll；
Magnesite muck is broken into≤5mm particle diameters through gyratory crusher or kibbler roll；
Particle diameter≤5mm low-grade magnesite, particle diameter≤5mm magnesite muck, magnesite milltailings are proportionally added into
≤ 0.088mm powder is worn into ball mill or tube mill altogether；Raw material weight proportioning of soup processed is：10~40 parts of low-grade magnesite；Water chestnut
20~80 parts of magnesium ore deposit muck；10~40 parts of magnesite milltailings；
(3) homogenizing is mixed
By the raw material of pre-treatment, additional bonding agent and water mix 1~10 minute in strength puddle mixer；Bonding agent gives up for paper pulp
Liquid or magnesium chloride solution, 1~9 part of bonding agent addition, the addition of water is 1~9 part；
(4) high pressure balling-up
Mix homogenizing ball or homogenizing elliptical shape ball that the material being homogenized is pressed into 30~60mm through strength ball press；
(5) dry
The homogenizing ball suppressed or homogenizing elliptical shape ball are dried 6~24 hours at 110~130 DEG C；
(6) it is calcined
By dried homogenizing ball or homogenizing elliptical shape ball in shaft furnace or rotary kiln, reflection roasting in kilns, sintering temperature is 700~
900 DEG C, soaking time is 30~180 minutes.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110040987A (en) * | 2019-04-16 | 2019-07-23 | 大连地拓环境科技有限公司 | A kind of method that magnesite flotation tailing prepares caustic-calcined magnesite |
| CN110304854A (en) * | 2019-07-05 | 2019-10-08 | 辽宁盛源新材料有限公司 | A kind of MgO expansion agent clinker and preparation method thereof |
| CN111348844A (en) * | 2020-03-12 | 2020-06-30 | 辽宁科大中驰镁建材科技有限公司 | System and process for preparing light-burned magnesia powder by using low-grade high-calcium magnesite |
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| CN1749193A (en) * | 2005-08-03 | 2006-03-22 | 东北大学 | Method for producing soft firing magnesium oxide using tunnel kiln to calcine magnesite |
| RU2372289C1 (en) * | 2008-03-11 | 2009-11-10 | Дмитрий Александрович Петухов | Method of producing magnesium oxide from talc-magnesite ore and talc tailings from talc-magnesite ore |
| 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 |
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2017
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Patent Citations (3)
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| CN1749193A (en) * | 2005-08-03 | 2006-03-22 | 东北大学 | Method for producing soft firing magnesium oxide using tunnel kiln to calcine magnesite |
| RU2372289C1 (en) * | 2008-03-11 | 2009-11-10 | Дмитрий Александрович Петухов | Method of producing magnesium oxide from talc-magnesite ore and talc tailings from talc-magnesite ore |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110040987A (en) * | 2019-04-16 | 2019-07-23 | 大连地拓环境科技有限公司 | A kind of method that magnesite flotation tailing prepares caustic-calcined magnesite |
| CN110040987B (en) * | 2019-04-16 | 2021-10-26 | 大连地拓环境科技有限公司 | Method for preparing light-burned magnesite from magnesite flotation tailings |
| CN110304854A (en) * | 2019-07-05 | 2019-10-08 | 辽宁盛源新材料有限公司 | A kind of MgO expansion agent clinker and preparation method thereof |
| CN111348844A (en) * | 2020-03-12 | 2020-06-30 | 辽宁科大中驰镁建材科技有限公司 | System and process for preparing light-burned magnesia powder by using low-grade high-calcium magnesite |
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