CN104961473B - A kind of method for producing outlet content of MgO rich forsterite sand less than 70% - Google Patents
A kind of method for producing outlet content of MgO rich forsterite sand less than 70% Download PDFInfo
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- CN104961473B CN104961473B CN201510297623.4A CN201510297623A CN104961473B CN 104961473 B CN104961473 B CN 104961473B CN 201510297623 A CN201510297623 A CN 201510297623A CN 104961473 B CN104961473 B CN 104961473B
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- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 229910052839 forsterite Inorganic materials 0.000 title claims abstract description 52
- 239000004576 sand Substances 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 80
- 235000012245 magnesium oxide Nutrition 0.000 claims abstract description 80
- 239000000843 powder Substances 0.000 claims abstract description 48
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 235000014380 magnesium carbonate Nutrition 0.000 claims abstract description 24
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 24
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 23
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 23
- 229910052904 quartz Inorganic materials 0.000 claims abstract description 23
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 23
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 23
- ZLNQQNXFFQJAID-UHFFFAOYSA-L Magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 22
- 238000005188 flotation Methods 0.000 claims abstract description 22
- 239000011776 magnesium carbonate Substances 0.000 claims abstract description 22
- 239000000126 substance Substances 0.000 claims abstract description 17
- 239000000654 additive Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 238000004450 types of analysis Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 12
- 230000000996 additive Effects 0.000 claims abstract description 7
- 230000001590 oxidative Effects 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 230000014759 maintenance of location Effects 0.000 claims abstract description 4
- 239000004575 stone Substances 0.000 claims description 11
- 239000006004 Quartz sand Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000005496 eutectics Effects 0.000 claims description 2
- 239000000047 product Substances 0.000 description 10
- 229910052500 inorganic mineral Inorganic materials 0.000 description 9
- 235000010755 mineral Nutrition 0.000 description 9
- 239000011707 mineral Substances 0.000 description 9
- 238000005070 sampling Methods 0.000 description 6
- 238000004898 kneading Methods 0.000 description 3
- 235000014347 soups Nutrition 0.000 description 3
- 239000011822 basic refractory Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002440 industrial waste Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 240000007817 Olea europaea Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- XZWYZXLIPXDOLR-UHFFFAOYSA-N metformin Chemical compound CN(C)C(=N)NC(N)=N XZWYZXLIPXDOLR-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Abstract
A kind of the present invention relates to fire resisting material field, more particularly to production outlet MgO<The method of 70wt% richness forsterite sands.First, magnesite flotation tailing or magnesia shaft furnace dust-removing powder are carried out light-burned；Then, to containing SiO2Weight of additive carry out chemical analyses for Y；By light burnt powder and containing SiO2Two kinds of raw materials of additive be sufficiently mixed uniformly, the water of the additional mixed material gross weight 3～5%, then knead uniform, pressure ball is spontaneously dried 2～4 days, is calcined under oxidizing atmosphere：1650 DEG C ± 50 DEG C of temperature, 5～10h of temperature retention time obtain MgO<70wt%, refractoriness>1800 DEG C of rich forsterite sand, rich forsterite sand is with forsterite as principal crystalline phase, with periclase as the second crystalline phase.The present invention is using magnesite flotation tailing and magnesia shaft furnace dust-removing powder production MgO<70wt% richness forsterite sands, to reduce pollution, increase benefit.
Description
Technical field
A kind of the present invention relates to fire resisting material field, more particularly to production outlet MgO<The side of 70wt% richness forsterite sands
Method.
Background technology
Magnesia export customs specify：MgO<The magnesia of 70wt% can exempt 390 yuan/ton of export duty.And current China magnesite
Ore deposit exploitation after, through calcining production magnesia, general content of MgO 70wt%, even three, level Four mineral resources be also thus, this will
Predicament is brought to the outlet of magnesia manufacturing enterprise.
The mine tailing of magnesite flotation is：After magnesite exploitation, process through crushing, obtained after carrying out flotation is impure
Higher, particularly containing the mineral that silicon dioxide is higher, typically this kind of mine tailing is thrown away as waste.
Magnesia shaft furnace dust-removing powder is：After the exploitation of magnesite stone ore, in shaft furnace during calcining smoke evacuation, institute in smoke evacuation system
The dust for containing, be typically deposited in around factory without.
With industry continuous development, the mine tailing of above-mentioned magnesite flotation, magnesia shaft furnace dust-removing powder quantity more and more,
Current processing mode is predominantly stacked, not only a large amount of land occupations, and above-mentioned substance is also easy to floating in the air, causes
Dust pollution.
How effectively utilizes above two industry byproduct, clean manufacturing, turns waste into wealth, and production metallurgy building materials industry is badly in need of
Rich forsterite refractory, while meeting MgO<The export requirement of 70wt%, foreign exchange earning is the weight of enterprise's urgent need solution
Want problem.
Content of the invention
It is an object of the invention to provide a kind of method for producing outlet content of MgO less than 70wt% richness forsterite sands,
Using magnesite flotation tailing and magnesia shaft furnace dust-removing powder production MgO<70wt% richness forsterite sands, to reduce pollution, increase
Benefit.
The technical scheme is that：
A kind of method for producing outlet content of MgO rich forsterite sand less than 70%, detailed process are as follows：
(1) magnesite flotation tailing or magnesia shaft furnace dust-removing powder are carried out light-burned：850 DEG C ± 50 DEG C of temperature, time 5～
10h；Gained light burnt powder weight is X, and it is a% to carry out chemical analyses to light burnt powder and obtain MgO weight contents；
(2) to containing SiO2Weight of additive carry out chemical analyses for Y, obtain MgO weight content b%；
(3) contain SiO2Additive with the light burnt powder weight ratio of magnesite flotation tailing or magnesia shaft furnace dust-removing powder be：
Y/X=(70-a)/(b-70)；
(4) raw material is weighed according to the above ratio, by light burnt powder and containing SiO2Two kinds of raw materials of additive be sufficiently mixed uniformly, outward
Plus the water of the mixed material gross weight 3～5%, then uniform, pressure ball is kneaded, spontaneously dry 2～4 days, forge under oxidizing atmosphere
Burn：1650 DEG C ± 50 DEG C of temperature, 5～10h of temperature retention time obtain MgO<70wt%, refractoriness>1800 DEG C of rich forsterite
Sand, rich forsterite sand is with forsterite as principal crystalline phase, with periclase as the second crystalline phase.
The method of described production outlet content of MgO rich forsterite sand less than 70%, containing SiO2Additive be particle diameter
The quartz sand of≤0.088mm, Silicon stone, silicon ash one or more, SiO2Content be >=96wt%.
The method of described production outlet content of MgO rich forsterite sand less than 70%, it is preferred that rich forsterite sand
Refractoriness is 1801 DEG C～2300 DEG C.It is furthermore preferred that the refractoriness of rich forsterite sand is 2100 DEG C～2250 DEG C.
The method of described production outlet content of MgO rich forsterite sand less than 70%, it is preferred that rich forsterite sand
Principal crystalline phase forsterite 45～60wt% of content, second crystalline phase periclase 35～50wt% of content of rich forsterite sand, magnesium olive
Olive stone and periclase sum account for 80～95wt% of total ore weight.It is furthermore preferred that forsterite and periclase sum account for Zong Kuang
83～94wt% of thing weight.
The present invention design philosophy be：
The present invention is using the light burnt powder of magnesite flotation tailing or the acquisition of magnesia shaft furnace dust-removing powder, containing SiO2Additive,
Contained MgO and SiO2In heating, reaction generates forsterite (Mg2SiO4) principal crystalline phase.Due to raw material (magnesite used herein
Stone flotation tailing or magnesia shaft furnace dust-removing powder) CaO/SiO2Weight ratio causes the R in system much smaller than 12O3Compound is (such as：
Al2O3、Fe2O3Deng) spinelle mineral are combined into MgO, unnecessary MgO is present in product with periclase becomes the second crystalline phase.
Due to MgO-2MgO.SiO2Binary eutectic point is 1860 DEG C.Therefore, the product content of MgO is less than 70wt%, with higher
Thermal structure intensity, is a kind of excellent basic refractory.
Advantages of the present invention and have the beneficial effect that：
1st, magnesite flotation tailing and magnesia shaft furnace dust-removing powder are used for making rich forsterite refractory by the present invention, appropriate
It is apt to process above-mentioned pollutant, twice laid reduces pollution of the above two industrial waste to environment.
2nd, the present invention makes rich forsterite refractory using industrial waste, significantly reduces forsterite fire proofed wood
The production cost of material；Also, the requirement of free export is met, is that enterprise and national export are earned foreign exchange and win larger benefit.
Specific embodiment
In a specific embodiment, method of the present invention production outlet content of MgO less than 70wt% richness forsterite sands, main
To include two main points：One is content of MgO less than 70wt%, two be the material be with forsterite as principal crystalline phase, with periclase
For the high-quality basic refractory of the second crystalline phase, detailed process is as follows：
(1) magnesite flotation tailing or magnesia shaft furnace dust-removing powder are carried out light-burned (850 DEG C ± 50 DEG C of temperature, time 5～
10h), gained light burnt powder weight is X, and it is a% to carry out chemical analyses to light burnt powder and obtain MgO weight contents；
(2) to containing SiO2Additive (weight is Y) carry out chemical analyses, obtain MgO weight content b%；
(3) contain SiO2Additive with the light burnt powder weight ratio of magnesite flotation tailing or magnesia shaft furnace dust-removing powder be：
Y/X=(70-a)/(b-70)；
The dispensing relation equation is to consider the composition using raw material, the mineral composition of forsterite, products export requirement
Calculate Deng deriving under the conditions of border, although different using raw material using equation dispensing, the product for obtaining is high temperatures
Can be stable, method is quick, accurate.
(4) raw material is weighed according to the above ratio, by light burnt powder and containing SiO2Two kinds of raw materials of additive be sufficiently mixed uniformly, outward
Plus the water of the mixed material gross weight 3～5%, then uniform, pressure ball is kneaded, spontaneously dry 2～4 days, forge under oxidizing atmosphere
Burn (1650 DEG C ± 50 DEG C of temperature, 5～10h of temperature retention time), MgO can be obtained<70wt%, refractoriness>1800 DEG C of rich magnesium Fructus Canarii albi
Stone sand.
Wherein, containing SiO2Additive be the quartz sand of particle diameter≤0.088mm, Silicon stone, silicon ash one or more,
SiO2Content be >=96wt%, containing SiO2The more the better.
Implementation steps main points of the present invention are：Magnesite flotation tailing or magnesia shaft furnace dust-removing powder are carried out light-burned, to light-burned
Powder carries out chemical analyses；To the SiO for selecting2Additive is also carried out chemical analyses.According to above-mentioned two chemical analysis results, outlet
Tax-free magnesia MgO<The requirement of 70wt% and magnesia refractories balance mineral facies theory carry out mathematical calculation, find out various raw materials
The relation equation of dispensing is carried out, dispensing practical operation is carried out according to relation equation.
The present invention is further elaborated on below by embodiment.
Embodiment 1
Particle diameter≤2000 kilograms of 0.088mm magnesites flotation tailing light burnt powder (X) is taken, chemical analyses are done in sampling, its result
It is listed in Table 1；Particle diameter≤300 kilograms of 0.088mm Cab-O-sils (Y) are taken, chemical analyses are done in sampling, and its result is listed in Table 1：
Table 1
Raw material weight proportioning of soup processed：
Cab-O-sil (Y)/magnesite flotation tailing light burnt powder (X)=(70-a)/(b-70)=(70-87.12)/(0.84-
70)=0.25=1/4.
250 kilograms of Cab-O-sil is weighed, 250 × 4=1000 kilogram of magnesite flotation tailing light burnt powder is weighed, above two is former
Material is put in kneading machine and is sufficiently mixed uniform, the water of the additional mixed material gross weight 4%, and pressure ball is spontaneously dried 3 days,
(1650 DEG C of temperature, time 6h) is calcined in oxidizing atmosphere, kiln discharge can obtain MgO<70wt%, refractoriness>1800 DEG C of rich magnesium
Olivine sand.
In the present embodiment, the content of MgO of rich forsterite sand is 69.70wt%, 2193 DEG C of refractoriness.Principal crystalline phase magnesium Fructus Canarii albi
Stone content 58.7wt%, the second crystalline phase periclase content 35.2wt%, above-mentioned two high temperature minerals sum account for the total ore weight of product
93.9wt%, therefore the high-temperature behavior such as product refractoriness is excellent.
Embodiment 2
Particle diameter≤3000 kilograms of 0.088mm magnesia shaft furnace dust-removing powder light burnt powder (X) is taken, chemical analyses are done in sampling, its result
It is listed in Table 1；Particle diameter≤400 kilograms of 0.088mm quartz sand powders (Y) are taken, chemical analyses are done in sampling, and its result is listed in Table 2：
Table 2
Raw material weight proportioning of soup processed：
Quartz sand powder (Y)/magnesia shaft furnace removes magnesia shaft furnace dust-removing powder light burnt powder (X)=(70-a)/(b-70)=(70-
92.17)/(0.62-70)=22.17/69.38=1/3.13；
300 kilograms of quartz sand powder is weighed, 300 × 3.13=939 kilogram of magnesia shaft furnace dust-removing powder light burnt powder is weighed, above-mentioned two
Kind raw material is put in kneading machine and is sufficiently mixed uniform, the water of the additional mixed material gross weight 4%, and pressure ball spontaneously dries 3
My god, (1650 DEG C of temperature, time 6h) is calcined in oxidizing atmosphere, kiln discharge can obtain MgO<70wt%, refractoriness>1800 DEG C
Rich forsterite sand.
In the present embodiment, the content of MgO of rich forsterite sand is 69.85wt%, 2204 DEG C of refractoriness.Principal crystalline phase magnesium Fructus Canarii albi
Stone content 56.2wt%, the second crystalline phase periclase content 36.7wt%, above-mentioned two high temperature minerals sum account for the total ore weight of product
92.9wt%, therefore the high-temperature behavior such as product refractoriness is excellent.
Embodiment 3
Particle diameter≤2500 kilograms of 0.088mm magnesites flotation tailing light burnt powder (X) is taken, chemical analyses are done in sampling, its result
It is listed in Table 3；Particle diameter≤300 kilograms of 0.088mm quartz sand powders (Y) are taken, chemical analyses are done in sampling, and its result is listed in Table 3：
Table 3
Raw material weight proportioning of soup processed：
Quartz sand powder (Y)/magnesite flotation tailing light burnt powder (X)=(70-a)/(b-70)=(70-80.33)/(0.73-
70)=10.33/69.27=1/6.71；
200 kilograms of quartz sand powder is weighed, 200 × 6.71=1342 kilogram of magnesite flotation tailing light burnt powder is weighed, above-mentioned
Two kinds of raw materials are put in kneading machine and are sufficiently mixed uniform, the water of the additional mixed material gross weight 4%, and pressure ball spontaneously dries 3
My god, (1650 DEG C of temperature, time 6h) is calcined in oxidizing atmosphere, kiln discharge can obtain MgO<70wt%, refractoriness>1800 DEG C
Rich forsterite sand.
In the present embodiment, the content of MgO of rich forsterite sand is 69.9wt%, 2229 DEG C of refractoriness.Principal crystalline phase magnesium Fructus Canarii albi
Stone content is 47.5wt%, and the second crystalline phase periclase content is 40.0wt%, and above-mentioned two high temperature minerals sum accounts for the total mineral of product
The 87.5wt% of weight, therefore the high-temperature behavior such as product refractoriness is excellent.
Embodiment described above is only that the preferred embodiment of the present invention is described, not the model to the present invention
Enclose and be defined, on the premise of without departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
Various modifications and improvement that case is made, all should fall in the protection domain of claims of the present invention determination.
Claims (6)
1. a kind of method for producing outlet content of MgO less than 70% rich forsterite sand, it is characterised in that detailed process is as follows：
（1）Magnesite flotation tailing or magnesia shaft furnace dust-removing powder are carried out light-burned：850 DEG C ± 50 DEG C of temperature, time 5～10；Institute
It is X to obtain light burnt powder weight, and it is a% to carry out chemical analyses to light burnt powder and obtain MgO weight contents；
（2）To containing SiO2Weight of additive carry out chemical analyses for Y, obtain MgO weight content b%；
（3）Contain SiO2Additive with the light burnt powder weight ratio of magnesite flotation tailing or magnesia shaft furnace dust-removing powder be：
Y/X=（70-a）/（b-70）；
（4）Raw material is weighed according to the above ratio, by light burnt powder and containing SiO2Two kinds of raw materials of additive be sufficiently mixed uniformly, additional institute
The water of mixed material gross weight 3～5% is stated, then kneads uniform, pressure ball, spontaneously dried 2～4 days, calcine under oxidizing atmosphere：Temperature
1650 DEG C ± 50 DEG C of degree, temperature retention time 5～10, due to MgO-2MgO.SiO2Binary eutectic point is 1860 DEG C, obtains MgO<
70 wt%, refractoriness>1800 DEG C of rich forsterite sand, rich forsterite sand with forsterite as principal crystalline phase, with periclase is
Second crystalline phase.
2. according to the method for the production outlet content of MgO rich forsterite sand less than 70% described in claim 1, it is characterised in that
Contain SiO2Additive be the quartz sand of particle diameter≤0.088mm, Silicon stone, silicon ash one or more, SiO2Content for >=
96 wt%.
3. according to the method for the production outlet content of MgO rich forsterite sand less than 70% described in claim 1, it is characterised in that
Preferably, the refractoriness of rich forsterite sand is 1801 DEG C～2300 DEG C.
4., according to the method for the production outlet content of MgO rich forsterite sand less than 70% described in claim 1 or 3, its feature exists
In, it is preferred that the refractoriness of rich forsterite sand is 2100 DEG C～2250 DEG C.
5. according to the method for the production outlet content of MgO rich forsterite sand less than 70% described in claim 1, it is characterised in that
Preferably, 45～60 wt% of principal crystalline phase forsterite content of rich forsterite sand, second crystalline phase side's magnesium of rich forsterite sand
35～50 wt% of stone content, forsterite and periclase sum account for 80～95 wt% of total ore weight.
6. according to the method for the production outlet content of MgO rich forsterite sand less than 70% described in claim 5, it is characterised in that
Preferably, forsterite and periclase sum account for 83～94 wt% of total ore weight.
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| CN107954729B (en) * | 2017-11-22 | 2021-08-03 | 辽宁利尔镁质合成材料股份有限公司 | Synthetic dead-burned magnesia and preparation method thereof |
| CN111017941A (en) * | 2020-01-16 | 2020-04-17 | 海城市中昊镁业有限公司 | Method for preparing sintered forsterite by re-sintering magnesite tailings |
| CN112250435A (en) * | 2020-10-22 | 2021-01-22 | 彰武县联信铸造硅砂有限公司 | Forsterite spherical sand and preparation method and application thereof |
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| CN102295293A (en) * | 2011-06-14 | 2011-12-28 | 辽宁科技大学 | Method for synthesizing high purity forsterite with mine tailings of magnesite and talcum |
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