CN109279783B - Microcrystalline glass with raw materials including chlorine-containing titanium extraction slag - Google Patents
Microcrystalline glass with raw materials including chlorine-containing titanium extraction slag Download PDFInfo
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- CN109279783B CN109279783B CN201811344111.9A CN201811344111A CN109279783B CN 109279783 B CN109279783 B CN 109279783B CN 201811344111 A CN201811344111 A CN 201811344111A CN 109279783 B CN109279783 B CN 109279783B
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- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0063—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing waste materials, e.g. slags
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Abstract
The invention provides microcrystalline glass with chlorine-containing titanium extraction slag as a main raw material. The glass-ceramic may include a glass phase and a microcrystalline phase, wherein the microcrystalline phase may include a diopside phase and a sphene phase. The beneficial effects of the invention can include: the comprehensive utilization of the chlorine-containing titanium extraction slag can be realized, and the utilization rate of the chlorine-containing titanium extraction slag is over 85 percent; the performance of the microcrystalline glass is excellent and is higher than that of natural stone.
Description
Technical Field
The invention relates to the field of resource utilization and inorganic non-metallic functional materials, in particular to microcrystalline glass prepared by taking chlorine-containing titanium extraction slag as a main raw material.
Background
The microcrystalline glass, also known as glass ceramic and microcrystalline ceramic, is a kind of polycrystalline material in which the microcrystalline phase and glass phase coexist, which is obtained by controlling heat treatment system based on glass and ceramic forming technology, and can be used as high-grade building decorative material and various functional materials, etc. because of its good mechanical property, high hardness, high wear resistance and acid-base corrosion resistance. The raw materials of the existing microcrystalline glass comprise industrial waste residues, tailings, fly ash and the like. The process for preparing the microcrystalline glass from the industrial waste residues has the problems of high energy consumption, long process flow, complicated working procedures and the like, and the utilization rate of the industrial waste residues is low.
The chlorine-containing titanium extraction slag is obtained by carrying out high-temperature carbonization and low-temperature chlorination on the titanium-containing blast furnace slag, has high chlorine content and is classified as dangerous slag, wherein the chlorine-containing titanium extraction slag has great harm to soil, environment and the like. Therefore, the treatment and comprehensive utilization of the chlorine-containing titanium extraction slag are important. The chlorine-containing titanium-extracting slag has high chlorine content, is difficult to be directly used for building material products, can be used only after being washed and roasted to remove chlorine or added with a dechlorinating agent to be roasted to remove chlorine, and has lower added value of products after chlorine removal.
At present, no microcrystalline glass containing chlorine titanium-extracting slag is available as a raw material.
Disclosure of Invention
In view of the deficiencies in the prior art, it is an object of the present invention to address one or more of the problems in the prior art as set forth above. For example, one of the purposes of the invention is to provide microcrystalline glass with chlorine-containing titanium-extracting slag as a main raw material to realize comprehensive utilization of the chlorine-containing titanium-extracting slag.
In order to achieve the aim, the invention provides microcrystalline glass with chlorine-containing titanium-extracting slag as a raw material. The microcrystalline glass comprises a glass phase and a microcrystalline phase, wherein the mass fraction of the glass phase is 80-85%, the mass fraction of the microcrystalline phase is 15-20%, and the microcrystalline phase comprises the following components in percentage by mass (95-97): (3-5) a diopside phase and a sphene phase.
According to an exemplary embodiment of the present invention, the morphology of the microcrystalline phase may include columnar and plate-like shapes.
According to an exemplary embodiment of the present invention, the columnar microcrystalline phase has a length of 1.5 to 3.5 μm and a width of 0.4 to 1 μm, and the flaky microcrystalline phase has a length of 2.3 to 3 μm and a width of 1.1 to 1.4 μm.
According to an exemplary embodiment of the present invention, the glass-ceramic further includes pores therein, and the pores include voids between the glass phase and the microcrystalline phase and/or voids between the respective crystalline phases. That is, the pores may include at least one of voids between respective crystal phases, and voids between a glass phase and a microcrystalline phase.
According to an exemplary embodiment of the present invention, in the glass ceramic, a volume ratio of the pores may be 4% or less, and further, may be 1 to 3%.
According to an exemplary embodiment of the present invention, the pore diameter of the pore may be 0.1 to 0.6 μm.
According to an exemplary embodiment of the present invention, the glass-ceramic may include the following components in percentage by mass:
27～30％CaO、33～36％SiO2、10～13％Al2O3、7～9％TiO2、3～5％Fe2O3、 5～7％MgO、2～3％R2o, wherein R2O comprises Na2O and K2At least one of O.
According to an exemplary embodiment of the present invention, the glass phase is filled between the microcrystalline phases and/or covers the grain surface.
According to an exemplary embodiment of the present invention, the microcrystalline glass may have a bulk density of 2.60 to 2.8g/cm3The water absorption rate can be below 0.3 percent, and the compressive strength can be 102-140 MPa. Further, the bulk density can be 2.65-2.76 g/cm3The water absorption rate can be 0.05-0.2%, and the compressive strength can be 120-140 MPa.
According to an exemplary embodiment of the present invention, the glass ceramics has an acid resistance of 96% or more and an alkali resistance of 97% or more. Further, the acid resistance can be 96-98.7%, and the alkali resistance can be 97-98.2%.
According to an exemplary embodiment of the present invention, the glass-ceramic comprises a glass-ceramic prepared by the following method: pretreating chlorine-containing titanium-extracting slag and waste glass to obtain blank-making powder, wherein the mass fraction of the chlorine-containing titanium-extracting slag in the raw materials is more than 85%; pressing and molding the blank-making powder to obtain a blank body; and heating the blank to 800-1000 ℃, preserving heat to promote nucleation and crystallization of the blank, heating to 1100-1200 ℃, sintering, and cooling after sintering to obtain the microcrystalline glass.
Compared with the prior art, the invention has the beneficial effects that: the comprehensive utilization of the chlorine-containing titanium extraction slag can be realized, and the utilization rate of the chlorine-containing titanium extraction slag is over 85 percent; the performance of the microcrystalline glass is excellent and is higher than that of natural stone.
Drawings
The above and other objects and features of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:
FIG. 1 is an X-ray diffraction chart showing a crystallized glass of the present invention;
fig. 2 is a scanning electron micrograph showing the crystallized glass of the present invention.
Detailed Description
Hereinafter, a glass ceramics using a titanium slag containing chlorine hydride as a main raw material according to the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.
The chlorine-containing titanium extraction slag is chlorine-containing low-titanium type industrial hazardous slag obtained by treating titanium-containing blast furnace slag through a high-temperature carbonization-low-temperature chlorination titanium extraction process. The chlorine-containing titanium-extracting slag mainly comprises CaO and SiO2、Al2O3Etc. according to the main components for preparing the microcrystalline glass, and simultaneously contains TiO which can be directly used as a nucleating agent component of the microcrystalline glass2、Fe2O3(ii) a Cl in chlorine-containing titanium extraction slag-2-5% of (A), Cl-CaCl is mainly used in the chlorine-containing titanium extraction slag2The chlorine-containing titanium slag has certain normal-temperature moisture absorption, and can play the roles of a granulating agent and a binding agent.
The method comprises the steps of taking chlorine-containing titanium extraction slag as a main raw material, adding a small amount of ingredients, pretreating (namely crushing, drying and mixing) to obtain powder for blank making, carrying out dry pressing and forming on the powder to obtain a microcrystalline glass blank, carrying out low-temperature heating, high-temperature heating and cooling on the blank in a tunnel kiln, and carrying out steps of trimming, polishing and the like to finally obtain the microcrystalline glass product. Wherein chlorine in the slag can be removed in the tunnel kiln. The ingredients can be waste glass; the batch mixture consisting of the chlorine-containing titanium-extracting slag and the ingredients comprises the following components in percentage by mass: over 85 percent of chlorine-containing titanium-extracting slag and less than 15 percent of waste glass. The method of the production process only needs one-time high-temperature treatment, and collects chloride generated in the process of firing the microcrystalline glass, so that no harmful gas is discharged in the process of preparing the microcrystalline glass containing the chlorine titanium extraction slag. The process is a green manufacturing process which utilizes solid waste, reduces environmental pollution, saves energy, reduces consumption and does not discharge three wastes in production.
In an exemplary embodiment of the invention, the microcrystalline glass may include a glass phase and a microcrystalline phase, wherein the mass fraction of the glass phase is 15-20%, the mass fraction of the microcrystalline phase is 80-85%, and further, the mass fraction of the glass phase is 16-18%, and the mass fraction of the microcrystalline phase is 82-84%. As shown in fig. 1, the microcrystalline phase may include a diopside phase and a sphene phase. Wherein, the diopside phase is a main crystal phase, the sphene phase is an auxiliary crystal phase, and the mass ratio of the two phases can be (95-97): (3-5), for example 96: 4.
In the embodiment, the diopside phase has the highest content and is the main crystal phase of the microcrystalline glass, so that the mechanical property of the microcrystalline glass can be improved, and the compressive strength of the microcrystalline glass is higher; the titanite phase has low content and is a secondary crystal phase formed in the crystallization process of the microcrystalline glass.
In this embodiment, the microcrystalline phase morphology in the microcrystalline glass mainly includes columnar and flaky shapes. Wherein, the diopside phase is columnar, and the sphene phase is flaky. The length of the columnar crystal is 1.5-3.5 μm, and the width is 0.4-1 μm; the length of the flaky crystal is 2.3 to 3 μm, and the width is 1.1 to 1.4 μm. The columnar crystal is a primary form of the microcrystalline phase, the plate-like crystal is a secondary form of the microcrystalline phase, the columnar crystal grows in aggregation, and the plate-like crystal exists in isolation. The sizes of the corresponding crystal grains of the above microcrystalline phase forms are smaller, the crystal grains are connected more finely, and the gaps among the crystal grains are reduced, so that the uniform filling of a glass phase is facilitated, and the performance of the microcrystalline glass is improved. Fig. 2 shows a scanning electron microscope image of the glass ceramics of the present invention, and in fig. 2, some cracks can be found, because the glass phase is corroded seriously by hydrofluoric acid after the glass ceramics are treated by hydrofluoric acid, and cracks are left on the surface of the glass ceramics instead of the pores of the glass ceramics.
In this embodiment, the glass phase is mainly an amorphous substance formed by softening the waste glass powder in the raw material at a high temperature, and the glass phase flows viscously at the high temperature to continuously fill the gaps between the crystal grains, so that the pores of the glass-ceramic can be reduced, and the glass-ceramic can be densified.
The glass phase is filled among the crystal grains and/or covered on the surface of the crystal grains, and the glass phase is tightly combined with the microcrystal, so that the glass-ceramics has good mechanical properties.
In the embodiment, the microcrystalline glass comprises the following main chemical components in percentage by mass:
27～30％CaO、33～36％SiO2、10～13％Al2O3、7～9％TiO2、3～5％Fe2O3、 5～7％MgO、2～3％R2o, wherein R2O comprises Na2O and K2At least one of O.
In the present example, the microcrystalline glass is composed of a microcrystalline phase, a glass phase, and fine pores. Wherein the proportion of pores is 4% or less, for example, 1 to 3%. The pores may comprise voids in the microcrystalline glass where the glass phase does not completely fill the spaces between the microcrystalline phases, i.e. the pores comprise voids between the glass phase and the microcrystalline phase; the pores may also include voids between the grains, i.e., the pores include voids at the junctions of the grains. The pore diameter of the pores may be 0.1 to 0.6 μm, for example 0.3 μm. In the production process of the microcrystalline glass or ceramic, pores cannot be completely eliminated, and the microcrystalline glass provided by the invention has the advantages of low pore occupation ratio and small pore diameter, so that the high performance of the microcrystalline glass can be ensured.
In this embodiment, the properties of the glass ceramics may include: the bulk density is 2.60-2.8 g/cm3The water absorption is less than 0.3%, the compressive strength is 102-140 MPa, the acid resistance is more than 96%, and the alkali resistance is more than 97%. For example, the volume density of the microcrystalline glass can be 2.65-2.76 g/cm3The water absorption rate can be 0.05-0.2%, the compressive strength can be 120-140 MPa, the acid resistance can be 96-98.7%, and the alkali resistance can be 97-98.2%.
The raw material of the glass ceramics affects the kind of microcrystalline phase formed by the glass ceramics. The content of calcium, magnesium, aluminum and silicon in the raw materials is higher, so that the diopside phase is favorably formed; the iron in the titanium slag can promote the crystallization of the microcrystalline glass, is beneficial to the growth of the diopside columnar form crystal grains, and improves the content of the diopside phase; part of titanium in the titanium extraction slag reacts with calcium silicon to crystallize and form sphene phase, and the sphene phase exists in the microcrystalline glass in a flaky crystalline form.
In this embodiment, the glass ceramics may include glass ceramics prepared by the following method.
The method comprises the steps of pretreating chlorine-containing titanium extraction slag and waste glass to obtain blank making powder with the water content of 3% -6% and the granularity of 40-100 mu m. The pretreatment may include drying, pulverizing, and mixing. The mass fraction of the chlorine-containing titanium-extracting slag in the raw material is more than 85 percent, which can meet the requirement of high utilization rate of solid wastes. The granularity of the blank-making powder is controlled to be 40-100 mu m, the blank forming is facilitated by controlling the granularity within the range, and the time and energy consumption increased by over-fine grinding can be avoided; furthermore, the granularity of the blank-making powder can be 45-96 mu m. The waste glass not only can play a role in fluxing, but also can provide a liquid phase under a high-temperature condition, promote compact sintering of a blank body and supplement components. If the water content in the raw materials is high, crushing is not facilitated (for example, ball milling is not facilitated), the uniformity of powder is influenced, the proportion of the raw materials is also influenced, and moreover, if the water content in the raw materials is high, water in the raw materials can flow out under pressure in subsequent compression molding, so that the corrosion of a mold is increased. Therefore, the raw material needs to be dried, and the water content in the green body powder is controlled to be 3% -6%, further 4% -6%, and further 4% -5%. When the moisture content of the blank making powder is lower than 3%, when the blank is pressed under the pressure in the blank making step, the blank cannot be compacted, defects appear at corners, and if the pressure is increased, the expansion of residual air is easily caused to crack the blank.
And pressing and molding the blank-making powder to obtain a microcrystalline glass blank. The step of press forming may comprise: uniformly spreading the blank-making powder in a mold at 250-720 kgf/cm2Maintaining the pressure for 15 to 30 seconds, and then demoulding to obtain a microcrystalline glass blank, further, the pressure can be 255 to 714kgf/cm2Pressure is maintained under the pressure of (1). The pressure and the dwell time parameters are controlled within the above range to facilitate the forming and demoulding of the blank, for example, the pressure can be controlled at 310 or 680kgf/cm2The time can be controlled at 17 or 28 s. Wherein, the environmental condition of the blank manufacturing can be room temperature, or the temperature slightly higher than the room temperature, such as 30-100 ℃.
And carrying out heat treatment on the blank to obtain the microcrystalline glass. Wherein the heat treatment may include: heating the blank to 800-1000 deg.C (low temperature stage), further 800-950 deg.C such as 810 deg.C and 910 deg.C, promoting nucleation and crystallization of the blank, further heating to 1100-1200 deg.C (high temperature stage or sintering stage), sintering, further 1130-1185 deg.C such as 1140 deg.C and 1170 deg.C, and finishing sinteringAnd then cooling. Wherein the heat preservation time in the low-temperature stage can be 30-60 min, and the heat preservation time in the high-temperature stage can be 30-90 min. The temperature rise speed of the heating to the low temperature stage can be controlled to be 5-15 ℃/min, so that volatile substances (such as CO) in the blank can be rapidly and maximally removed in the low temperature stage2Chloride, etc.) to facilitate the collection of chloride and the sintering of green bodies; further, the temperature rise rate in the low-temperature stage can be 5-10 ℃/min. The heating rate of heating from the low-temperature stage to the high-temperature stage can be controlled to be 3-5 ℃/min, so that the problems of sintering deformation or uneven sintering of the blank caused by too high heating rate can be prevented at the high-temperature stage, namely the sintering quality can be influenced by too high heating rate, and the energy consumption is high and the efficiency is low due to too low heating rate. The temperature and time of the low-temperature stage are controlled to be 800-1000 ℃ and 30-60 min, so that the nucleation and crystallization of the blank are facilitated; the temperature and time of the high-temperature stage are controlled to be 1100-1200 ℃ and 30-90 min, so that the green body can be sintered compactly. The step of cooling may include slow cooling to room (or ambient) temperature, or slow cooling followed by fast cooling. Wherein, the slow cooling first and then the fast cooling specifically can include: after heat preservation at the sintering temperature is finished (namely heat preservation at a high-temperature stage is finished), slow cooling treatment is carried out, the temperature is slowly reduced to 300-500 ℃ from the sintering temperature, the temperature reduction rate can be 1-4 ℃/min, and the temperature reduction rate can reduce the influence of quartz crystal form conversion or sintering instability on the microcrystalline glass; then, the temperature is rapidly reduced from 300-500 ℃ to below 200 ℃, for example, 30-100 ℃, the performance of the microcrystalline glass in the temperature range is not influenced by the temperature, so that rapid cooling can be performed, for example, cold air is directly blown to perform rapid cooling to reduce energy consumption, and the temperature reduction rate at this stage can be 5-10 ℃/min.
The chlorine-containing titanium-extracting slag comprises the following components in percentage by mass: 28 to 33 percent of CaO and 20 to 25 percent of SiO2、10～14％Al2O3、2～7％MgO、2～10％TiO2、2～4％Fe2O3And 2-5% of Cl element. The water content of the chlorine-containing titanium-extracting slag accumulated in the slag yard is greatly influenced by the environmental humidity and seasons, for example, the water content of the chlorine-containing titanium-extracting slag can reach 8-10% in summer with high humidity, and the water content of the chlorine-containing titanium-extracting slag can reach water content in autumn with low humidityThe amount is also 6-8%.
Because the chlorine-containing titanium-extracting slag has moisture absorption, water in the chlorine-containing titanium-extracting slag, such as water which is not dried and removed in the chlorine-containing titanium-extracting slag and water which absorbs moisture for the second time in the pretreatment process, can play a role of a binder in the pretreatment process, and meanwhile, due to the binding action generated by the water, small particles are agglomerated, and a granulation effect is also formed, wherein the granulation process is actually to aggregate fine powder particles into large particles through the binding action.
The above method may further comprise the steps of: the gas produced during the heat treatment stage is collected and condensed to recover chlorides, which may include chloride gases including potassium, sodium chloride salts such as sodium chloride, potassium chloride, and the like. Wherein, the gas generated in the first heating stage (the stage of heating from room temperature to 800-1000 ℃) and the first heat preservation stage (the heat preservation stage of 800-1000 ℃) can be collected and condensed repeatedly, because the content of chlorine recovered by cooling is very small when the temperature exceeds 1000 ℃, and only accounts for 1-5% of the total chlorine. Wherein the condensation temperature is 400-500 ℃, and the condensation temperature is controlled in the range, so that chloride gas can be fully condensed and precipitated, and aggregated powder can be obtained to the maximum extent. For example, when the heat treatment process is performed in a tunnel kiln, a gas collecting and condensing device is additionally arranged on an exhaust pipeline of a low-temperature heating section (heated to 800-1000 ℃) of the tunnel kiln, and the condensing temperature is set to be 400-500 ℃ for recovering chloride. In the heating process, chloride volatilizes from the body, chloride gas is rapidly pumped into an exhaust pipeline by an air inducing mechanism, the exhaust pipeline can be a pipeline which is corroded by acid and alkali-resistant gas, when the gas flows to the position near the pipeline with a condensing device, the chloride in the gas is condensed to form an aggregate which is attached to a pipe wall, meanwhile, a reciprocating scraper machine can be arranged on the pipe wall for circulating operation, the aggregate is cleaned to a collecting bag below the pipeline, chloride powder products such as potassium, sodium and the like can be obtained, and the condensed harmless gas is introduced into a kiln by the air inducing machine, so that on one hand, the waste heat of the gas can be utilized, on the other hand, the residual chloride gas can be adsorbed on the body to be heated, and then enters the exhaust pipeline again in the heating process, and further purification is obtained. For example, the outlet end of the exhaust duct may be arranged at the inlet of the low temperature heating zone to preheat the green body that is about to enter the low temperature heating zone.
In order to better understand the above exemplary embodiments of the present invention, the following describes a microcrystalline glass using chlorine-containing titanium tetrachloride slag as a main raw material, with reference to a specific example.
The preparation method comprises the following steps:
1) drying the chlorine-containing titanium-extracting slag and the waste glass in a drying chamber at 105 ℃ for 8h, crushing, grinding and grading, weighing and matching 85% of the chlorine-containing titanium-extracting slag and 15% of the waste glass according to the mass percentage, and taking powder with the particle size of 45 mu m as powder for blank making.
2) Spreading 45 μm powder for blank making in a mold, and pressing with a press at 255kgf/cm2Keeping the pressure for 30s for dry pressing and molding, and then demoulding to obtain the microcrystalline glass blank. And no granulating agent or binder is added in the process of forming the microcrystalline glass blank.
3) Putting the microcrystalline glass blank into a tunnel kiln, and setting a heat treatment program and parameters, wherein the heat treatment program comprises the following specific steps: heating from room temperature to 850 ℃ at a heating rate of 10 ℃/min, and keeping the temperature for 60 min; then heating from 850 ℃ to 1130 ℃ at the heating rate of 3 ℃/min, and preserving the heat for 90 min; then slowly cooling to 350 ℃, wherein the cooling rate is 4 ℃/min; then rapidly cooling from 350 ℃ to 80 ℃, wherein the cooling rate is 10 ℃/min; and taking out after cooling, polishing and trimming to obtain the glass ceramic product. And starting a gas collecting and condensing device of the tunnel kiln when the temperature is between room temperature and 850 ℃, and setting the condensing temperature to be 450 ℃. And collecting the chloride generated by the blank in the temperature rising process, wherein the collecting process is the same as the above, and then obtaining potassium-sodium chloride powder.
The obtained microcrystalline glass product has a main crystal phase of diopside phase and a secondary crystal phase of sphene phase (see figure 1). The microcrystalline glass is subjected to performance test, and the bulk density of the microcrystalline glass product is 2.74g/cm3The water absorption rate is 0.09%, the compressive strength is 131MPa, the acid resistance is 98.5%, and the alkali resistance is 97%.
In conclusion, compared with the prior art, the method for preparing the microcrystalline glass by using the chlorine-containing titanium extraction slag has remarkable progress, and has the following beneficial effects:
1) the invention takes the chlorine-containing titanium-extracting slag as the main raw material, and the utilization rate of the chlorine-containing titanium-extracting slag can be more than 85 percent.
2) The performance of the glass ceramics is higher than that of natural stone, and the glass ceramics can be used as high-grade building decorative materials, craft sculptures, functional ceramic materials and the like.
3) The invention utilizes the normal-temperature moisture absorption characteristic of the chlorine-containing titanium slag, and does not need to add a binder or a granulating agent in the process of forming the microcrystalline glass blank.
4) The microcrystalline glass can be directly sintered at a lower temperature, so that the energy consumption in the process of preparing the microcrystalline glass is saved.
Although the present invention has been described above in connection with exemplary embodiments, it will be apparent to those skilled in the art that various modifications and changes may be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The microcrystalline glass is characterized by comprising a glass phase and a microcrystalline phase, wherein the mass fraction of the glass phase is 15-20%, the mass fraction of the microcrystalline phase is 80-85%,
the microcrystalline phase comprises the following components in percentage by mass (95-97): (3-5) a diopside phase and a sphene phase;
the microcrystalline glass comprises the following components in percentage by mass: 27 to 30% CaO, 33 to 36% SiO2、10～13％Al2O3、7～9％TiO2、3～5％Fe2O3、5～7％MgO、2～3％R2O, wherein R2O comprises Na2O and K2At least one of O;
the chlorine-containing titanium extraction slag is obtained by treating titanium-containing blast furnace slag through high-temperature carbonization and low-temperature chlorination titanium extraction processes;
the mass fraction of the chlorine-containing titanium-extracting slag in the raw material is more than 85%;
the micro-crystalline phase comprises a columnar shape and a flaky shape, the diopside phase is columnar, and the sphene phase is flaky.
2. The raw material of the glass-ceramic containing chlorine titanium-extracting slag according to claim 1, wherein the length of the columnar microcrystal phase is 1.5-3.5 μm, the width is 0.4-1 μm, and the length of the flaky microcrystal phase is 2.3-3 μm, and the width is 1.1-1.4 μm.
3. The raw material of the glass-ceramic according to claim 1 comprises chlorine titanium-containing slag, and is characterized in that the glass-ceramic further comprises air holes, and the air holes comprise gaps among crystal phases and/or gaps among glass phases and microcrystal phases.
4. The glass-ceramic according to claim 3, wherein the volume ratio of the pores in the glass-ceramic is 4% or less.
5. The raw material of the glass-ceramic containing chlorine titanium-extracting slag according to claim 3, wherein the pore diameter of the pores is 0.1-0.6 μm.
6. The raw material of the glass-ceramic according to claim 1, wherein the glass-ceramic comprises chlorine-containing titanium-extracting slag, and the bulk density of the glass-ceramic is 2.60-2.80 g/cm3The water absorption rate is less than 0.3%, and the compressive strength is 102-140 MPa.
7. The raw material of the glass-ceramic according to claim 1, which comprises a chlorine titanium-containing slag, wherein the glass-ceramic has an acid resistance of 96% or more and an alkali resistance of 97% or more.
8. The raw material of the glass-ceramic according to claim 1 comprises chlorine titanium-containing slag, and is characterized in that the glass-ceramic comprises glass-ceramic prepared by the following method:
pretreating chlorine-containing titanium extraction slag and waste glass to obtain blank-making powder with the water content of 3-6% and the granularity of 40-100 mu m;
pressing and molding the blank-making powder to obtain a blank body;
and heating the blank to 800-1000 ℃, preserving heat to promote nucleation and crystallization of the blank, heating to 1100-1200 ℃, sintering, and cooling after sintering to obtain the microcrystalline glass.
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| CN108516689B (en) * | 2018-04-25 | 2020-12-01 | 东北大学 | Method for preparing microcrystalline foam glass from high-silicon iron tailings and blast furnace slag |
| CN108558217A (en) * | 2018-07-03 | 2018-09-21 | 四川名微晶科技股份有限公司 | A method of devitrified glass is prepared with titanium slag tailings collaboration granite tailing |
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