CN101428808A - Method for synthesizing dichroite with solid castoff - Google Patents
Method for synthesizing dichroite with solid castoff Download PDFInfo
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- CN101428808A CN101428808A CNA2008102392647A CN200810239264A CN101428808A CN 101428808 A CN101428808 A CN 101428808A CN A2008102392647 A CNA2008102392647 A CN A2008102392647A CN 200810239264 A CN200810239264 A CN 200810239264A CN 101428808 A CN101428808 A CN 101428808A
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Abstract
A method for synthesizing dichroite from solid waste belongs to the technical field of non-metallic inorganic material synthesis. The invention adopts coal refuse and waste refractory materials (magnesia carbon bricks and sliding plate bricks) as raw materials for sintering synthesis, and high-purity dichroite can be generated after reaction. The raw materials comprise the following components by weight part: 70%-80% of coal refuse, 10%-20% of magnesia carbon bricks, and 10%-20% of sliding plate bricks. The mixed raw materials react for synthesis at 1300 DEG C-1420 DEG C under the air atmosphere, and are cooled after heat insulation for about 2-6 hours, and the high-purity dichroite material can be obtained. The invention has the characteristics of low production cost, high dichroite transformation efficiency and good performance; not only solid waste is fully utilized for synthesizing the dichroite material, the industrial cost is reduced, and considerable economic benefits are created, but also a novel idea is provided for treating a large amount of solid waste, and the environmental protection is greatly facilitated.
Description
Technical field
The present invention relates to the synthesis technical field of ceramic, particularly use the method for coal gangue and waste refractory materials normal pressure synthesis trichroite.
Background technology
China's industrial waste has tens kinds of mine tailing, coal gangue, flyash, blast furnace slag, waste refractory materials etc.Coal gangue is meant the solid waste that produces in coal mining, the dressing of coal by washing process, also is available resource, has dual nature.Seat surplus the existing waste dump 1500 in state-owned colliery, the whole nation, accumulating amount (accounts for more than 40% of Chinese industrial solid waste total emission volumn) more than 3,000,000,000 tons.At present, China's year consumes about 9,000,000 tons of refractory materials, and waste refractory materials has reached about 4,000,000 tons.The typical processing mode of a large amount of solid waste is exactly as garbage bury, on a small quantity by coarse utilization, and low added value.Very low to its treatment effect and renewable resource utilization rate, and these wastes have brought huge harm to us.Rationally utilize solid waste, economize on resources, development new technologies all have crucial meaning for improving industrial production benefit and environment protection.
Cordierite material has low thermal expansivity, good thermal shock, good advantages such as thermostability are arranged, and Chang Zuowei heat-shock resistance material is widely used in automobile exhaust gas purifying installation, support of the catalyst, refractory coating, heat exchanger material, electronic package material, foamed ceramics, printed circuit board (PCB) etc.Since last century 60, the seventies, cordierite ceramic has just become an important subject in the stupalith field, is still one of stupalith of various countries' primary study exploitation at present.Adopt raw material synthesis of dichroite researchs such as kaolin, corundum, commercial alumina, bauxite clinker, flint clay, talcum, magnesite more both at home and abroad, domestic also existing human coal gangue and Al
2O
3Deng the raw material synthesis of dichroite, but adopted the part industrial raw material, the report of using the synthesizing dichroite with solid castoff material fully seldom.From reduce cost, the angle of save energy, protection environment, select to have considerable meaning with synthesizing dichroite with solid castoff such as coal gangues.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing synthesizing dichroite with solid castoff fully, reduce the accumulation of coal gangue and waste refractory materials, reduce cost, save energy, protection environment.
A kind of method with synthesizing dichroite with solid castoff is characterized in that raw material is coal gangue, uses the back magnesia carbon brick and use the tail skid brick; Its mass ratio is coal gangue 70%～80%, uses back magnesia carbon brick 10%～20%, uses tail skid brick 10%～20%.
With coal gangue and waste refractory materials is the raw material synthesis of dichroite, and processing step is:
(1) raw material is prepared: grind with coal gangue, with the back magnesia carbon brick, with tail skid brick process and make fine powder, and by 325 purposes sieve, the composition quality ratio of described solid waste is: C accounts for 10%～20% in the coal gangue, Al2O3 accounts for 15%～25%, SiO2 accounts for 50%～60%, MgO accounts for 0.5%～3%, and all the other are the oxide compound of a spot of iron content, calcium; Account for 3%～10% with Al2O3 in the magnesia carbon brick of back, SiO2 accounts for 2%～10%, and MgO accounts for 70%～80%, and all the other are a spot of iron content, calcium, potassium, titanyl compound; Account for 85%～95% with Al2O3 in the tail skid brick, SiO2 accounts for 2%～5%, and all the other are a spot of oxide compound that contains magnesium, iron, calcium, potassium, titanium, sodium.
(2) mix: the ratio of coal gangue, magnesia carbon brick and slide brick in the control synthesis material, according to the Design Theory value, load weighted coal gangue and waste refractory materials are utilized water or dehydrated alcohol (quality percentage composition 〉=99.7%) dilution, coal gangue and waste refractory materials and water or dehydrated alcohol massfraction proportional range are that 1:3 is to 1:6, diameter is that the agate ball (at the bottom of the cloth canful) of 1cm is as ball-milling medium, after the raw material of dilution and agate ball put into nylon jar sealing, ball milling 6h in planetary ball mill is ground to particle diameter less than 5um.
(3) oven dry: mixed raw materials is put into 100 ℃ in loft drier, 5h drying.
(4) moulding: the exsiccant raw material is added a spot of polyvinyl alcohol adhesive (0.5mL/10g), mechanical pressing under the pressure of 40MPa.
(5) high temperature sintering: in air atmosphere, temperature is 1300 ℃～1420 ℃, and soaking time is a sintering sample base under the condition of 2-6h.
(6) cooling: naturally cooling in air.
Advantage of the present invention is that the raw material of preparation all is a solid waste, and reserves are abundant, and the trichroite purity that generates behind the sintering reaction is higher, trichroite (2MgO2Al
2O
35SiO
2) content reaches more than 95%, has very high practical value.Utilize the synthesizing dichroite with solid castoff material,, realized the comprehensive utilization of resource, created economic benefit, not only saved cost, for huge contribution has been made in environment protection.
Description of drawings
Fig. 1 is the XRD figure with coal gangue synthetic trichroite
Fig. 2 is that magnification is 500 times the fracture SEM photo with coal gangue synthetic trichroite
Fig. 3 is that magnification is 2000 times the fracture SEM photo with coal gangue synthetic trichroite
Embodiment
Embodiment 1:
Batching mass ratio: coal gangue, with back magnesia carbon brick, be respectively 73.9%, 13.5%, 12.6% with the tail skid brick.
The coal gangue composition: C accounts for 10%～20%, and Al2O3 accounts for 15%～25%, and SiO2 accounts for 50%～60%, and MgO accounts for 0.5%～3%, and all the other are the oxide compound of a spot of iron content, calcium.
With back magnesia carbon brick composition: Al2O3 accounts for 3%～10%, and SiO2 accounts for 2%～10%, and MgO accounts for 70%～80%, and all the other are a spot of iron content, calcium, potassium, titanyl compound.
With tail skid brick composition: Al2O3 accounts for 85%～95%, and SiO2 accounts for 2%～5%, and all the other are a spot of oxide compound that contains magnesium, iron, calcium, potassium, titanium, sodium.
In coal gangue and waste refractory materials raw material, add dehydrated alcohol diluted mixture, ball milling 6h, oven dry, moulding in the 1:3 ratio.
Synthetic atmosphere: air atmosphere.
Synthesis temperature: 1380 ℃.
Soaking time: 3 hours.
Embodiment 2:
Batching mass ratio: coal gangue, with back magnesia carbon brick, be respectively 80%, 11%, 9% with the tail skid brick.
The coal gangue composition: C accounts for 10%～20%, and Al2O3 accounts for 15%～25%, and SiO2 accounts for 50%～60%, and MgO accounts for 0.5%～3%, and all the other are the oxide compound of a spot of iron content, calcium.
With back magnesia carbon brick composition: Al2O3 accounts for 3%～10%, and SiO2 accounts for 2%～10%, and MgO accounts for 70%～80%, and all the other are a spot of iron content, calcium, potassium, titanyl compound.
With tail skid brick composition: Al2O3 accounts for 85%～95%, and SiO2 accounts for 2%～5%, and all the other are a spot of oxide compound that contains magnesium, iron, calcium, potassium, titanium, sodium.
In coal gangue and waste refractory materials raw material, add dehydrated alcohol diluted mixture, ball milling 6h, oven dry, moulding in the 1:4 ratio.
Synthetic atmosphere: air atmosphere.
Synthesis temperature: 1380 ℃.
Soaking time: 3 hours.
Obtained highly purified cordierite material by experiment, the X-ray diffraction result of synthetic materials as shown in Figure 1, as can be seen from the figure, main component is a trichroite.
Claims (2)
1. the method with synthesizing dichroite with solid castoff is characterized in that raw material is coal gangue, usefulness back magnesia carbon brick and slide brick; Its mass ratio is coal gangue 70%～80%, uses back magnesia carbon brick 10%～20%, uses tail skid brick 10%～20%.
2. a kind of according to claim 1 method with synthesizing dichroite with solid castoff is characterized in that processing step is:
(1) raw material is prepared: pass through to grind with coal gangue, with back magnesia carbon brick, slide brick and make fine powder, and by 325 purposes sieve, the composition quality ratio of described solid waste is: C accounts for 10%～20% in the coal gangue, Al2O3 accounts for 15%～25%, SiO2 accounts for 50%～60%, MgO accounts for 0.5%～3%, and all the other are the oxide compound of a spot of iron content, calcium; Account for 3%～10% with Al2O3 in the magnesia carbon brick of back, SiO2 accounts for 2%～10%, and MgO accounts for 70%～80%, and all the other are a spot of iron content, calcium, potassium, titanyl compound; Account for 85%～95% with Al2O3 in the tail skid brick, SiO2 accounts for 2%～5%, and all the other are a spot of oxide compound that contains magnesium, iron, calcium, potassium, titanium, sodium;
(2) mix: the ratio of coal gangue, magnesia carbon brick and slide brick in the control synthesis material, according to the Design Theory value, load weighted coal gangue and waste refractory materials are utilized water or quality percentage composition 〉=99.7% dehydrated alcohol dilution, coal gangue and waste refractory materials and water or dehydrated alcohol massfraction proportional range are that 1:3 is to 1:6, diameter is that the agate ball of 1cm is as ball-milling medium, after the raw material of dilution and agate ball put into nylon jar sealing, ball milling 6h in planetary ball mill is ground to particle diameter less than 5um;
(3) oven dry: mixed raw materials is put into 100 ℃ in loft drier, 5h drying;
(4) moulding: the exsiccant raw material is added 0.5mL/10g polyvinyl alcohol adhesive, mechanical pressing under the pressure of 40MPa;
(5) high temperature sintering: in air atmosphere, temperature is 1300 ℃～1420 ℃, and soaking time is a sintering sample base under the condition of 2-6h;
(6) cooling: naturally cooling in air.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319164A (en) * | 2013-05-09 | 2013-09-25 | 福建师范大学 | Method for preparing cordierite material by using oil refinery waste catalysis cracking equilibrium catalyst |
| CN104177074A (en) * | 2014-08-25 | 2014-12-03 | 盐城工学院 | Coal-gangue-base infrared material, and preparation method and application thereof |
| CN105367047A (en) * | 2015-12-01 | 2016-03-02 | 安徽建筑大学 | Preparation method of sintering body with principal crystalline phase of cordierite by using coal gangue and nickel slag |
| CN108752011A (en) * | 2018-05-30 | 2018-11-06 | 安徽理工大学 | A method of using anhydrous magnesium chloride as fused salt base CORDIERITE SYNTHESIZED AT LOW TEMPERATURE powder |
| CN109020576A (en) * | 2018-09-08 | 2018-12-18 | 佛山朝鸿新材料科技有限公司 | A kind of air brick highly resistance blanket |
| CN111205074A (en) * | 2020-01-13 | 2020-05-29 | 山东晟世达科技有限公司 | Foamed ceramic containing cordierite framework and preparation method thereof |
| CN111233497A (en) * | 2020-02-27 | 2020-06-05 | 辽宁科技大学 | Method for synthesizing cordierite refractory raw material by solid-phase reaction sintering method |
| CN116425521A (en) * | 2023-03-23 | 2023-07-14 | 怀化市华恒莫来石有限公司 | Production process of cordierite |
-
2008
- 2008-12-05 CN CN2008102392647A patent/CN101428808B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319164A (en) * | 2013-05-09 | 2013-09-25 | 福建师范大学 | Method for preparing cordierite material by using oil refinery waste catalysis cracking equilibrium catalyst |
| CN104177074A (en) * | 2014-08-25 | 2014-12-03 | 盐城工学院 | Coal-gangue-base infrared material, and preparation method and application thereof |
| CN105367047A (en) * | 2015-12-01 | 2016-03-02 | 安徽建筑大学 | Preparation method of sintering body with principal crystalline phase of cordierite by using coal gangue and nickel slag |
| CN108752011A (en) * | 2018-05-30 | 2018-11-06 | 安徽理工大学 | A method of using anhydrous magnesium chloride as fused salt base CORDIERITE SYNTHESIZED AT LOW TEMPERATURE powder |
| CN109020576A (en) * | 2018-09-08 | 2018-12-18 | 佛山朝鸿新材料科技有限公司 | A kind of air brick highly resistance blanket |
| CN111205074A (en) * | 2020-01-13 | 2020-05-29 | 山东晟世达科技有限公司 | Foamed ceramic containing cordierite framework and preparation method thereof |
| CN111205074B (en) * | 2020-01-13 | 2022-08-05 | 山东晟世达科技有限公司 | Foamed ceramic containing cordierite framework and preparation method thereof |
| CN111233497A (en) * | 2020-02-27 | 2020-06-05 | 辽宁科技大学 | Method for synthesizing cordierite refractory raw material by solid-phase reaction sintering method |
| CN116425521A (en) * | 2023-03-23 | 2023-07-14 | 怀化市华恒莫来石有限公司 | Production process of cordierite |
| CN116425521B (en) * | 2023-03-23 | 2024-04-02 | 怀化市华恒莫来石有限公司 | Production process of cordierite |
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| CN101428808B (en) | 2010-12-29 |
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Granted publication date: 20101229 Termination date: 20171205 |