CN101954308A - Titanium powder crushing grinding aid technology - Google Patents
Titanium powder crushing grinding aid technology Download PDFInfo
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- CN101954308A CN101954308A CN 200910216550 CN200910216550A CN101954308A CN 101954308 A CN101954308 A CN 101954308A CN 200910216550 CN200910216550 CN 200910216550 CN 200910216550 A CN200910216550 A CN 200910216550A CN 101954308 A CN101954308 A CN 101954308A
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- titanium dioxide
- grinding aid
- disintegrating apparatus
- viscosity
- 1000cst
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Abstract
The invention provides a method for treating the organic surface aiming at improving the crushing efficiency of titanium powder, which is characterized by acting on the titanium powder particles by Raymond mill and other crushing equipment by using one or more organic silicon material compounds to modify the surface of the titanium powder. The method can remarkably improve the powder yield of the titanium powder crushing equipment and convenience of equipment maintenance (mainly reducing wall adhesion). The method has the advantages of simple operation, convenient manufacture, mild reacting condition, no environmental pollution and low cost.
Description
Technical field
The invention belongs to the efficiency improvement method that titanium dioxide is pulverized, more specifically say at the titanium dioxide pulverizing process to add suitable organosilicon grinding aid material, thus the method for the convenience of the flour extraction of raising titanium dioxide disintegrating apparatus and corrective maintenance (mainly being to reduce sticking wall).
Background technology
Titanium dioxide is the situation of high speed development at home as a kind of high-grade Chinese white that is widely used, and has become second-biggest-in-the-world titanium white production state at present.Titanium dioxide will be brought into play the characteristic of its high covering power, and uniform particles tiny (micron order is to Subnano-class), particle diameter are evenly distributed, and dry powder good fluidity, water/oil body are that good dispersion is a prerequisite.
Through the kiln material that falls after the calcining, particle is thick and hard, just can use after must pulverizing through disintegrating apparatus such as Raymond mills.For the break section of titanium dioxide, all there is following point in the titanium white production enterprise of China in varying degrees:
Sticking wall/crush efficiency is low
Too wide/the profile of particle diameter distribution is not slick and sly
Dry powder mobile poor/the easy moisture absorption
The titanium dioxide surface generally by polar group (as-OH) coat, in its crushing process, titanium dioxide produces reunion because of polarity absorption or the moisture absorption easily, after strong mechanical external force is pulverized, also can produce secondary agglomeration, can't reach the fineness of regulation, also can be bonded on the wall of disintegrating apparatus (as Raymond mill) sometimes, have a strong impact on the flour extraction of disintegrating apparatus.And this titanium dioxide corner angle are a lot, and size distribution is very wide, make evenly to have titanium dioxide difficulties in dispersion in application system in the application system, and this can have a strong impact on the pigment performance of titanium dioxide.Disintegrating apparatus (as Raymond mill) flour extraction is low, causes the titanium dioxide pulverizing time to increase, and energy resource consumption increases, and workman's working time increases; Titanium dioxide glues wall, and factory has to stop to produce, and takes much time and clears up disintegrating apparatus, has a strong impact on the production efficiency of disintegrating apparatus.In a lot of titanium white production factories, this has become the bottleneck that factory's production capacity improves.
Summary of the invention
The present invention proposes to adopt a kind of special organosilicon material, enter disintegrating apparatus (as Raymond mill) in the titanium dioxide pulverizing process stage with titanium dioxide, assist to disperse, the polar group of shielding titanium dioxide particle surface, reducing the surface can, the broken required dynamics of reduction particle stops the particle generation secondary agglomeration after pulverizing, and then improves the crush efficiency of disintegrating apparatus, the width that reduction titanium dioxide particle diameter distributes, the method that improves titanium dioxide dry powder flowability.
We realize above-mentioned purpose by the technical scheme of accompanying drawing:
1. press figure disintegrating apparatus schematic diagram, the adding set (barrel containers) of a grinding aid is installed.
Description of drawings
Accompanying drawing is that titanium dioxide is pulverized schematic diagram
1 bag-type dust
2 cyclone separators
3 lingering remnants of past customs pipes
4 backwind tubes
5 blower fans
6 cyclone separators
7 measuring chutes
8 upcast ventilation pipes
9 grinding machines
10 high-order buckets
11 feed auger
12 titanium dioxide feed bins
14 elevators
14 point of additions
The specific embodiment
1) installation of interpolation bucket
A. grinding aid is added bucket and be fixed in 0.5-2.0 rice above the disintegrating apparatus charging aperture.Fixing way can be taked ways such as welding, hook, iron wire binding, can not fall in disintegrating apparatus operation vibrations process but must guarantee to add bucket;
B. use the moderate plastic hose of bore, one end connects the material outlet that grinding aid adds the bucket bottom, the underfeed mouth of an end connection traffic meter (near the adjusting knob place), and the junction, two ends of plastic cement pipe must be closely, in order to avoid fall in the use, can take ways such as iron wire binding in case of necessity; Be connected on the upper part discharge port (can take ways such as iron wire binding in case of necessity) of flowmeter again with the moderate plastic hose of another root bore; The length of flexible pipe can conveniently flow into grinding aid in the feed well of disintegrating apparatus and be as the criterion;
2) adjusting of flowmeter
A. grinding aid is added the valve closing of bucket bottom, in grinding aid adds bucket, add 5-10 kilogram grinding aid;
B. the top that the plastic cement pipe of connection traffic meter discharging opening is put in the disintegrating apparatus feed well is located to fix for about about 5 centimetres, guarantee grinding aid drop in titanium dioxide fall the kiln material be about to enter disintegrating apparatus the position above;
C. open the valve that grinding aid adds the bucket bottom, the control handle of rotometer bottom arrives required flow velocity with Flow-rate adjustment.
3) calculating of flowmeter flow velocity
V＝AXM X?1000/60
V: the flow velocity of flowmeter, unit are the ml/min ml/min
A: the adding proportion of grinding aid,
M: the unit-hour output kilogram of disintegrating apparatus/hour
1000: the conversion of kilogram and gram (milliliter), (density of grinding aid is about 1 grams per milliliter)
60: hour and minute conversion.
Example:
The unit-hour output of disintegrating apparatus is 800 kilograms/hour (M=800)
Adding proportion: 0.1% (A=0.1%)
The flow velocity V=0.1%X 800 X 1000/60=13.33ml/min of flowmeter then
Then the flow velocity of flowmeter should be adjusted in 13.33ml/min
2. start all switches of disintegrating apparatus, begin the titanium dioxide kiln material that falls is added disintegrating apparatus continuously, average powder outlet quantity (kilogram/hour) is measured in continuous operation 8 hours;
3. in the special organosilicon grinding aid material that measures being joined in the grinding aid material interpolation bucket, control the adding proportion of grinding aid material by regulating flowmeter.
4. continuous operation is 8 hours, makes required titanium dioxide, measures average powder outlet quantity (kilogram/hour);
Wherein said special organosilicon grinding aid material is that viscosity is one or more the compound in the hydroxy-end capped polysiloxanes of 5-1000cst, the polysiloxanes that contains the ether side chain, the aliphatic chain silane coupler.Molecular formula is:
1. hydroxy-end capped polysiloxanes
(HO)(CH3)2SiO[SiO(CH3)2]nSi(CH3)2(OH)n＝15-50
2. the polysiloxanes that contains the ether side chain
(CH3)3SiO[SiO(OCmH2mOH)(CH3)]nSi(CH3)3 n＝15-50?m＝5-10
3. aliphatic chain is silane coupled
CnH
2n+1Si(OC
2H
5)3 n＝4-10
Embodiment 1
Start all switches of disintegrating apparatus, begin the titanium dioxide kiln material that falls is added disintegrating apparatus continuously, continuous operation 8 hours makes required titanium dioxide sample, measures average powder outlet quantity (kilogram/hour).
Under the prerequisite of disintegrating apparatus ordinary production, with 10 kilograms of viscosity is that the hydroxy-end capped polysiloxanes of 5-1000cst joins the grinding aid material and adds in the bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Under the prerequisite of disintegrating apparatus ordinary production, with 10 kilograms of viscosity is that the polysiloxanes that contains the ether side chain of 5-1000cst joins the grinding aid material and adds in the bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Under the prerequisite of disintegrating apparatus ordinary production, the aliphatic chain silane coupler that is 5-1000cst with 10 kilograms of viscosity joins in the grinding aid material interpolation bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Under the prerequisite of disintegrating apparatus ordinary production, aliphatic chain silane coupler and 5 kilograms of viscosity of being 5-1000cst with 5 kilograms of viscosity are to join the grinding aid material after the hydroxy-end capped polysiloxanes of 5-1000cst mixes to add in the bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Embodiment 6
Under the prerequisite of disintegrating apparatus ordinary production, with 5 kilograms of viscosity aliphatic chain silane coupler that is 5-1000cst and 5 kilograms of viscosity is to join the grinding aid material after polysiloxanes that 5-1000cst contains the ether side chain mixes to add in the bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Embodiment 7
Under the prerequisite of disintegrating apparatus ordinary production, with 5 kilograms of viscosity is that the hydroxy-end capped polysiloxanes of 5-1000cst and 5 kilograms of viscosity are to join the grinding aid material after polysiloxanes that 5-1000cst contains the ether side chain mixes to add in the bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Embodiment 8
Under the prerequisite of disintegrating apparatus ordinary production, with 5 kilograms of viscosity is that the hydroxy-end capped polysiloxanes of 5-1000cst, 5 kilograms of viscosity are that 5-1000cst contains and joins the grinding aid material after the polysiloxanes of ether side chain and aliphatic chain silane coupler that 5 kilograms of viscosity is 5-1000cst mix and add in the bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Under the prerequisite of disintegrating apparatus ordinary production, with 5 kilograms of viscosity is that the hydroxy-end capped polysiloxanes of 5-1000cst, 2.5 kilograms of viscosity are that 5-1000cst contains and joins the grinding aid material after the polysiloxanes of ether side chain and aliphatic chain silane coupler that 2.5 kilograms of viscosity is 5-1000cst mix and add in the bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Under the prerequisite of disintegrating apparatus ordinary production, with 2.5 kilograms of viscosity is that the hydroxy-end capped polysiloxanes of 5-1000cst, 2.5 kilograms of viscosity are that 5-1000cst contains and joins the grinding aid material after the polysiloxanes of ether side chain and aliphatic chain silane coupler that 5 kilograms of viscosity is 5-1000cst mix and add in the bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Under the prerequisite of disintegrating apparatus ordinary production, with 2.5 kilograms of viscosity is that the hydroxy-end capped polysiloxanes of 5-1000cst, 5 kilograms of viscosity are that 5-1000cst contains and joins the grinding aid material after the polysiloxanes of ether side chain and aliphatic chain silane coupler that 2.5 kilograms of viscosity is 5-1000cst mix and add in the bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Under the prerequisite of disintegrating apparatus ordinary production, with 5 kilograms of viscosity is that the hydroxy-end capped polysiloxanes of 5-1000cst, 2.5 kilograms of viscosity are that 5-1000cst contains and joins the grinding aid material after the polysiloxanes of ether side chain and aliphatic chain silane coupler that 5 kilograms of viscosity is 5-1000cst mix and add in the bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Under the prerequisite of disintegrating apparatus ordinary production, with 5 kilograms of viscosity is that the hydroxy-end capped polysiloxanes of 5-1000cst, 5 kilograms of viscosity are that 5-1000cst contains and joins the grinding aid material after the polysiloxanes of ether side chain and aliphatic chain silane coupler that 2.5 kilograms of viscosity is 5-1000cst mix and add in the bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Under the prerequisite of disintegrating apparatus ordinary production, with 2.5 kilograms of viscosity is that the hydroxy-end capped polysiloxanes of 5-1000cst, 5 kilograms of viscosity are that 5-1000cst contains and joins the grinding aid material after the polysiloxanes of ether side chain and aliphatic chain silane coupler that 5 kilograms of viscosity is 5-1000cst mix and add in the bucket, the flow velocity of flowmeter is adjusted to 0.05% (the grinding aid material is with respect to the weight ratio of titanium dioxide addition), produced 8 hours continuously, make required titanium dioxide, measure average powder outlet quantity (kilogram/hour)
Performance Detection
1. pulverize the grinding aid performance
| Index | Example 1 (blank sample) | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 | Example 10 | Example 11 | Example 12 | Example 13 | Example 14 |
| The grinding machine powder outlet quantity (kilogram/hour) | 600? | 700? | 680? | 700? | 750? | 715? | 710? | 720? | 730? | 720? | 700? | 780? | 740? | 720? |
2. residue on sieve
The mechanical douche of pressing GB5211.14-88 is measured the residue on sieve of titanium dioxide.The sieve aperture is 45 microns.
| Index | Example 1 (blank sample) | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 | Example 10 | Example 11 | Example 12 | Example 13 | Example 14 |
| Residue on sieve (%) | 0.035? | 0022? | 0020? | 0.025? | 0.021? | 0.020? | 0.023? | 0.025? | 0.024? | 0.022? | 0.020? | 0.020? | 0.022? | 0.021? |
3. dry powder flowability
It is in 20 microns the vibratory sieve that 1 kilogram of titanium dioxide is joined the aperture, and the statistics titanium dioxide is the time by sieve fully.Time is short more, and expression titanium white dry powder flowability is good more.
| Index | Example 1 (blank sample) | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 | Example 10 | Example 11 | Example 12 | Example 13 | Example 14 |
| Sieve the time (second) | 10? | 5? | 8? | 5? | 4? | 7? | 8? | 5? | 5? | 6? | 7? | 6? | 7? | 8? |
4. oil-dispersing property
Undertaken by " the graceful method of black square of titanium dioxide dispersion property ", concrete steps are:
A. the preparation of colourless slip takes by weighing 50g high-purity SiO
2Grind 4-5 time on three-roller with the 950g miscella, the graceful number of black square that makes slip is greater than 6.5.
B.TiO
2Colourless slip 2.8mL (rutile-type) is drawn in the preparation of cream slurry or 3.1mL (anatase titanium dioxide) concentrates the chassis that drips at the plain grinding instrument, taking by weighing the 3.00g titanium dioxide again is sprinkling upon on the colourless slip, stir pigment and oil with scraper, allowing grinder change 25 * 2 changes, and makes even Tio2 cream slurry.
C. assay method drips the Tio2 cream slurry for preparing and is placed on the graceful test block of black square, and scraper plate (generally is no more than 10 seconds) at the appointed time and reads fast.The graceful numerical value of black square, promptly dispersed number.
| Index | Example 1 (blank sample) | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 | Example 10 | Example 11 | Example 12 | Example 13 | Example 14 |
| Oil-dispersing property | 3.0? | 5.5? | 5.0? | 4.5? | 5.5? | 6.0? | 5.0? | 5.5? | 5.5? | 5.0? | 5.5? | 6.0? | 5.5? | 5.0? |
5. water dispersible
Water dispersible is measured rules
A. weighing
Take by weighing titanium pigment specimen 15g, put into the 500ml beaker that the 285ml deionized water is housed in advance.
B. disperse
Beaker is placed on stirs 30min on the magnetic stirring apparatus.
C. the mensuration of slurry begins
Get vibration disposed slurry 10ml immediately and put into the evaporating dish of constant weight, take by weighing slurry weight (W1), be put into then in 140 ℃ of baking ovens baking more than 4 hours to constant weight, take by weighing residual part weight (W2) after the cooling.
D. standing sedimentation
To remain dispersed paste and pack in the graduated cylinder, and make liquid level keep 200mm, place on the smooth operating desk standing sedimentation 5 hours.
E. dispersion liquid sampling
Dispersion liquid after will leaving standstill with pipette begins at the bottom of the liquid 30mm from the liquid level face and partly sucks the 250ml beaker and (do not shake graduated cylinder).
F. the dispersion liquid oven dry is weighed
Dispersion liquid in the 250ml beaker that shakes up with pipette, extract 10m l in the evaporating dish of constant weight, takes by weighing slurry weight (W3) this moment,
The same baking is more than 4 hours, and cooling takes by weighing residual part of weight (W4).
G. calculate: W4 * W1
Water dispersible (%)=----* 100
W2×W3
Wherein: W1: the weight of the initial slurry of 10ml before leaving standstill
The content of titanium dioxide among the W2:W1
W3: the weight that leaves standstill slip after 5 hours
The content of titanium dioxide among the W4:W3
| Index | Example 1 (blank sample) | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 | Example 10 | Example 11 | Example 12 | Example 13 | Example 14 |
| Water dispersible (%) | 65? | 75? | 80? | 75? | 85? | 75? | 80? | 85? | 75? | 80? | 75? | 80? | 75? | 85? |
By above-mentioned experimental result as can be seen, organosilicon grinding aid material of the present invention is joined the pulverizing process of titanium dioxide, can improve the flour extraction 20-30% of disintegrating apparatus, reduce residue on sieve more than 15%, improve 1.5-3.0 graceful numerical value of black square of oil-dispersing property, improve water dispersible 15-20%, the dry powder flowability that improves titanium dioxide is more than 20%.
Claims (4)
1. organic surface treatment method that improves the titanium dioxide crush efficiency, it is characterized in that: the special organosilicon material with an amount of viscosity joins in the grinding aid material interpolation bucket earlier, start disintegrating apparatus, the normal titanium dioxide kiln material that falls that drops into, then special organosilicon material metering is added drop-wise in the disintegrating apparatus continuously, makes required titanium dioxide.
2. as right 1 described a kind of organic surface treatment method that improves the titanium dioxide crush efficiency, it is characterized in that organosilicon material is hydroxy-end capped polysiloxanes, its molecular formula is: (HO) (CH3) 2SiO[SiO (CH3) 2] nSi (CH3) 2 (OH) n=15-50; The polysiloxanes that contains the ether side chain, its molecular formula is: (CH3) 3SiO[SiO (OCmH2mOH) is (CH3)] nSi (CH3) 3 n=15-50 m=5-10; The aliphatic chain silane coupler, its molecular formula is: CnH2n+1Si (OC2H5) 3 n=4-10; In one or more mixture.The consumption of organosilicon material is: 0.05-0.15%.
3. as right 1 described a kind of organic surface treatment method that improves the titanium dioxide crush efficiency, it is characterized in that disintegrating apparatus can be that Raymond mill is with air swept mill.
4. as right 1 described a kind of organic surface treatment method that improves the titanium dioxide crush efficiency, it is characterized in that carrying out organic surface-treated titanium dioxide is the kiln material of handling without any organic or inorganic that falls.
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|---|---|---|---|
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| CN101954308B CN101954308B (en) | 2013-05-15 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102993783A (en) * | 2012-10-10 | 2013-03-27 | 道奇威（成都）科技有限公司 | Organic surface modification method for anatase titanium dioxide for polyester synthesis |
| CN103044972A (en) * | 2013-01-07 | 2013-04-17 | 道奇威（成都）科技有限公司 | Organic surface modification method for improving hydrophobicity of anatase titanium dioxide |
| CN104307596A (en) * | 2014-10-31 | 2015-01-28 | 浙江浙能催化剂技术有限公司 | Primary crushing system for SCR (selective catalytic reduction) denitrification catalyst |
| CN104646156A (en) * | 2013-11-19 | 2015-05-27 | 昆明德道科技有限公司 | Ultrafine titanium concentrate grinding process flow |
| CN109021618A (en) * | 2017-06-12 | 2018-12-18 | 江苏特丰新材料科技有限公司 | A kind of organic surface modifying method of polyester synthesis titanium dioxide |
| CN110841759A (en) * | 2018-08-21 | 2020-02-28 | 达清环保企业股份有限公司 | Crushing processing method for viscous substance |
| CN112679992A (en) * | 2020-12-25 | 2021-04-20 | 江苏特丰新材料科技有限公司 | Titanium dioxide for inorganic building coating and preparation method thereof |
| CN115814903A (en) * | 2022-11-25 | 2023-03-21 | 大连亚泰科技新材料股份有限公司 | Raymond mill with heating system and modifier metering system and method for preparing surface modified ore fine powder by using raymond mill |
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2009
- 2009-12-04 CN CN 200910216550 patent/CN101954308B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102993783A (en) * | 2012-10-10 | 2013-03-27 | 道奇威（成都）科技有限公司 | Organic surface modification method for anatase titanium dioxide for polyester synthesis |
| CN103044972A (en) * | 2013-01-07 | 2013-04-17 | 道奇威（成都）科技有限公司 | Organic surface modification method for improving hydrophobicity of anatase titanium dioxide |
| CN104646156A (en) * | 2013-11-19 | 2015-05-27 | 昆明德道科技有限公司 | Ultrafine titanium concentrate grinding process flow |
| CN104307596A (en) * | 2014-10-31 | 2015-01-28 | 浙江浙能催化剂技术有限公司 | Primary crushing system for SCR (selective catalytic reduction) denitrification catalyst |
| CN109021618A (en) * | 2017-06-12 | 2018-12-18 | 江苏特丰新材料科技有限公司 | A kind of organic surface modifying method of polyester synthesis titanium dioxide |
| CN110841759A (en) * | 2018-08-21 | 2020-02-28 | 达清环保企业股份有限公司 | Crushing processing method for viscous substance |
| CN112679992A (en) * | 2020-12-25 | 2021-04-20 | 江苏特丰新材料科技有限公司 | Titanium dioxide for inorganic building coating and preparation method thereof |
| CN115814903A (en) * | 2022-11-25 | 2023-03-21 | 大连亚泰科技新材料股份有限公司 | Raymond mill with heating system and modifier metering system and method for preparing surface modified ore fine powder by using raymond mill |
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