CN112960907A - Coffee microcrystalline glass stone prepared from molybdenum tailings and preparation method thereof - Google Patents
Coffee microcrystalline glass stone prepared from molybdenum tailings and preparation method thereof Download PDFInfo
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- CN112960907A CN112960907A CN202110289928.6A CN202110289928A CN112960907A CN 112960907 A CN112960907 A CN 112960907A CN 202110289928 A CN202110289928 A CN 202110289928A CN 112960907 A CN112960907 A CN 112960907A
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- C—CHEMISTRY; METALLURGY
- 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
- C03C10/16—Halogen containing crystalline phase
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B32/00—Thermal after-treatment of glass products not provided for in groups C03B19/00, C03B25/00 - C03B31/00 or C03B37/00, e.g. crystallisation, eliminating gas inclusions or other impurities; Hot-pressing vitrified, non-porous, shaped glass products
- C03B32/02—Thermal crystallisation, e.g. for crystallising glass bodies into glass-ceramic articles
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- C—CHEMISTRY; METALLURGY
- 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
- C03C4/00—Compositions for glass with special properties
- C03C4/02—Compositions for glass with special properties for coloured glass
Abstract
The invention relates to a coffee microcrystalline glass stone prepared from molybdenum tailings and a preparation method thereof. The method mainly comprises the following temperature system: preheating the batch at 800-900 ℃, and melting at 1490-1510 ℃; directly nucleating at 710-740 ℃ after molding, and crystallizing at 810-860 ℃; the invention has the advantages that the molybdenum tailings containing more impurities can be integrally utilized, the proportion of the molybdenum tailings in the raw materials is more than 50%, the prepared microcrystalline glass stone has uniform coffee color and better architectural decoration effect, the bending strength of the microcrystalline glass stone is as high as 80-100 MPa, the heat and shock resistance of the microcrystalline glass stone is good, and the applicable range of the microcrystalline glass stone is wider.
Description
Technical Field
The invention relates to the technical field of environment-friendly waste-utilizing new materials, and particularly relates to a coffee-colored microcrystalline glass stone prepared from molybdenum tailings and a preparation method thereof.
Background
Glass ceramics, which are also known as glass ceramics, are a class of polycrystalline materials obtained by controlled crystallization of glass. It has certain properties of both glass and crystalline material. As a building material, the performance of the material integrates the advantages of glass, ceramics and stone; as functional and structural materials, the material has wide application in the fields of micro-electronic technologies such as light, electricity, biochemical and magnetic technologies, biomedicine, national defense advanced technology, mechanical manufacturing and the like.
In recent years, with the development of national economy and industrial technology, the development of mineral resources is continuously increased, and molybdenum metal has the characteristics of high conductivity, high strength, high melting point, corrosion resistance and the like, so that the molybdenum metal is widely applied to the fields of alloy, chemical engineering, electronics and the like, and the demand of the molybdenum metal is gradually increased. However, the molybdenum ore in China has low grade, and the low-grade ore deposit with the average grade lower than 0.1 percent accounts for 65 percent of the total reserves, while the ore deposit with the grade higher than 0.3 percent only accounts for 1 percent of the total reserves. In the process of extracting the molybdenum resource by adopting the flotation technology, the ore resource accounting for more than 95 percent of the mining amount of the ore can be discharged in the form of tailings. The vast majority of molybdenum tailings in China are stored in tailings ponds, ditches, fields and the like for a long time and are not effectively utilized, the accumulation of the molybdenum tailings not only occupies a large amount of land resources and increases construction and maintenance funds of the tailings ponds, but also pollutes water and soil, forms potential geological disasters and generates great potential safety hazards to surrounding living environments.
Molybdenum tailThe mineral has a composition close to that of glass, and the main component of the mineral is SiO2、Al2O3CaO, MgO and the like can be used as raw materials of Ca-Mg-Al-Si series microcrystalline glass, so that the preparation of the microcrystalline glass stone with high added value by utilizing the molybdenum tailings is an important way for utilizing the molybdenum tailings. However, the molybdenum tailings are complex in components, and the mineral composition of the molybdenum tailings is often accompanied with various mineral components such as iron, sulfur, titanium, copper, tungsten, manganese and the like, the molybdenum tailings subjected to flotation and magnetic separation still have more impurities, the impurities are too much, so that the prepared microcrystalline glass is impure in color and texture, and the overall crystallization effect is often poor, so that the application range of the microcrystalline glass is limited, and the microcrystalline glass is particularly reflected in the field of architectural decoration with high requirements on product appearance. Generally, in the process of melting microcrystalline glass composed of molybdenum tailings serving as raw materials, better melting quality and appearance are obtained by reducing the consumption of the molybdenum tailings, but the reduction of the consumption of the molybdenum tailings cannot meet the target requirement of 'efficiently utilizing the tailings integrally and turning waste into wealth'. Therefore, how to consider the product quality and appearance requirements of the molybdenum tailing microcrystalline glass and achieve the aim of 'efficiently and integrally utilizing the tailings' is the problem to be solved at present.
Disclosure of Invention
Aiming at the problems, the invention provides a coffee microcrystalline glass stone prepared from molybdenum tailings and a preparation method thereof.
The invention adopts the following technical scheme for achieving the purpose:
a coffee microcrystalline glass stone prepared from molybdenum tailings comprises the following raw materials: according to the mass percentage, the molybdenum tailings are 50-53%, the limestone is 26-27%, the dolomite is 8-9%, the silica sand is 3-5.5%, the sodium fluosilicate is 4-4.5%, the chromite powder is 3-3.5%, and the titanium dioxide is 1.5-1.8%.
Further, the coffee microcrystalline glass stone prepared from the molybdenum tailings comprises the following raw materials: according to the mass percentage, the molybdenum tailings are 52 percent, the limestone is 26.7 percent, the dolomite is 8.6 percent, the silica sand is 4.0 percent, the sodium fluosilicate is 4.0 percent, the chromite powder is 3.1 percent, and the titanium dioxide is 1.6 percent; wherein, the titanium dioxide has higher solubility in the glass melt at high temperature, and a titanium-rich phase is easily formed during cooling, so that the phase separation of the glass can be obviously promoted; adding sodium fluosilicate, and promoting glass nucleation by using the principle of fluoride opacified glass; the strong electric field action of chromium ions in the ferrochrome mineral powder can promote the phase separation of the basic glass and reduce the potential energy barrier of crystal growth, thereby promoting the crystal phase separation.
Further, the molybdenum tailings comprise the following chemical components in percentage by mass: SiO 22：69～72％，Al2O3：12～15％，CaO：2～4％，MgO：2.5～4.5％，Na2O：1.5～2.5％，K2O：2.5～4.5％，Fe2O3：1～3％，TiO2：0～0.5％，SO3: 0.3-1.2%, and other impurities: less than or equal to 1 percent.
Further, the chemical composition components of the chromite powder converted into oxides are as follows by mass percent: cr (chromium) component2O3：46.5～47.5％，Fe2O3：29～31％，Al2O3：13.8～14.8％，MgO：8～10％，SiO2：1.0～2.5％，CaO：0.3～0.4％。
Further, the preparation method of the coffee microcrystalline glass stone prepared from the molybdenum tailings comprises the following steps:
(1) preheating: uniformly mixing molybdenum tailings, limestone, dolomite, silica sand, sodium fluosilicate, ferrochromium mineral powder and titanium dioxide, pouring the mixture into a preheated quartz crucible, and placing the quartz crucible in a high-temperature furnace with the same temperature as the quartz crucible for heat preservation for 25-35 min to fully preheat the mixture;
(2) and (3) melt molding: heating the preheated raw materials to 1490-1510 ℃, preserving heat for 2 hours, pouring the obtained molten glass liquid on a mold, and performing compression molding;
(3) nucleation and crystallization: putting the formed glass liquid into a furnace for nucleation and crystallization;
(4) annealing: and after the crystallization treatment is finished, cooling and annealing the glass-ceramic sample to room temperature in a kiln, taking the glass-ceramic sample out of the kiln, and cutting, grinding and polishing the obtained glass-ceramic sample to obtain the coffee-colored glass-ceramic stone.
The main crystalline phase of the glass ceramics is pyroxene ((Mg, Fe, Al, Ti) (Ca, Na, Mg, Fe) (Si, Al)2O6) The secondary crystal phase includes xonotlite, chromite and the like. The main crystal phase microscopically shows a network structure consisting of irregular granular crystals in the glass ceramics, and the grain size of the granular crystals is about 100-300 nm; the proportion and the size of the crystal phase can be controlled by adjusting the adding amount of the sodium fluosilicate, the chromite powder and the titanium dioxide, and the nucleating and crystallizing temperature and time, and the type, the size and the number of the crystal phase determine the performance of the microcrystalline glass stone.
Furthermore, the microcrystalline glass is coffee-colored and is a result of mixed coloring of different valence ion concentrations of chromium, iron and titanium, and specific coloring is mainly formed by Cr6+And Cr3+、Fe3+And Fe2+、Ti4+And Ti3+The concentration and proportion of the plasma, and the precipitated crystal phase and grain size are determined, and are influenced by the composition of the batch and the melting process.
Further, in the step (1), the temperature of the quartz crucible is 800-900 ℃, the raw materials are fully preheated at the temperature, and at the temperature, the thermal decomposition reaction of the sodium fluosilicate is violent, and the melting foaming can promote the melting and clarification of the glass.
Further, in the step (2), the temperature is raised at a rate of 10 ℃/min.
Further, in the step (3), the nucleation temperature is 700-740 ℃, and the nucleation time is 40-70 min.
Further, in the step (3), the crystallization temperature is 810-860 ℃, and the crystallization time is 50-100 min.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a coffee microcrystalline glass stone prepared by molybdenum tailings and a preparation method thereof, wherein industrial solid waste molybdenum tailings are used as a main raw material, a microcrystalline glass stone formula is designed according to the composition characteristics of chemical components in the molybdenum tailings, limestone, dolomite and silica sand are used as basic raw materials, sodium fluosilicate, ferrochrome mineral powder and titanium dioxide are used as composite nucleating agents, and the ferrochrome mineral powder and the titanium dioxide are used as coloring agents, and are subjected to high-temperature melting, nucleating and crystallization treatment to form the coffee microcrystalline glass stone with a pyroxene as a main crystal phase; the invention adds the chromite powder and the titanium dioxide and adjusts the dosage of the chromite powder and the titanium dioxide to ensure that the appearance of the microcrystalline glass stone is uniform coffee color, so that the microcrystalline glass stone has good decoration effect; the consumption of the molybdenum tailings in the microcrystalline glass stone formula is more than 50 percent, the aim of efficiently and integrally utilizing the molybdenum tailings is fulfilled, and the molybdenum tailing resources are fully utilized.
The invention designs the formula of the microcrystalline glass and the preparation method thereof according to the characteristic of higher iron content in molybdenum tailings, controls the concentration and proportion of ions with different valence states of chromium, iron and titanium, adjusts the melting process to enable the microcrystalline glass to be uniformly colored coffee, and controls the type, proportion and size of a crystalline phase by adjusting the component proportion of a composite nucleating agent and the temperature and time of nucleation and crystallization to obtain the microcrystalline glass stone material which has compact microstructure, high bending strength and good thermal shock resistance, has main performance superior to that of common microcrystalline glass, can be used for various purposes such as architectural decoration, electrical appliance panels and the like, and expands the application range of the microcrystalline glass taking the molybdenum tailings as the main raw material.
Through detection, the density of the microcrystalline glass sample prepared by the method is 2.7-2.8 g/cm3The bending strength can reach 80-100 MPa, and the hardness, water absorption, thermal shock resistance and chemical corrosion resistance of the material all meet the standard requirements of building material decorative materials. According to the coffee-colored microcrystalline glass stone prepared from the molybdenum tailings and the preparation method thereof, molybdenum tailing resources are fully utilized on the basis of ensuring the quality and good appearance of the microcrystalline glass stone, and the target requirements of 'efficiently utilizing tailings integrally and turning waste into wealth' are met.
Drawings
FIG. 1 is a sample of a coffee-colored glass-ceramic stone according to the present invention;
FIG. 2 is a polished surface of the coffee-colored glass-ceramic stone according to the present invention, in which a circular area is a polished portion;
FIG. 3 is an SEM image of a sample of the present invention at a magnification of 5 ten thousand;
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
The molybdenum tailings comprise the following main components in percentage by mass: SiO 22：70.84％，Al2O3：14.29％，CaO：2.46％，MgO：4.26％，Na2O：2.19％，K2O：3.45％，Fe2O3：1.21％，TiO2：0.18％，SO3: 0.46%, other impurities: 0.66 percent.
The ferrochrome mineral powder comprises the following main components in percentage by mass: cr (chromium) component2O3：46.98％，Fe2O3：30.71％，Al2O3：14.42％，MgO：8.04％，SiO2：2.68％，CaO：0.34％。
Example 1
A coffee microcrystalline glass stone prepared from molybdenum tailings comprises the following raw materials: according to the mass percentage, the molybdenum tailings comprise 50 percent of limestone, 26 percent of limestone, 9.0 percent of dolomite, 5.5 percent of silica sand, 4.2 percent of sodium fluosilicate, 3.5 percent of ferrochrome mineral powder and 1.8 percent of titanium dioxide.
A preparation method of coffee microcrystalline glass stone prepared from molybdenum tailings comprises the following steps:
(1) preheating: uniformly mixing molybdenum tailings, limestone, dolomite, silica sand, sodium fluosilicate, ferrochromium mineral powder and titanium dioxide, pouring into a quartz crucible preheated to 800 ℃, and placing in a high-temperature furnace with the same temperature as the quartz crucible for heat preservation for 35min to fully preheat the mixture;
(2) and (3) melt molding: heating the preheated raw materials to 1490 ℃ at the speed of 10 ℃/min, preserving the heat for 2 hours, pouring the obtained molten glass liquid on a mould, and performing compression molding;
(3) nucleation and crystallization: putting the formed glass liquid into a furnace for nucleation and crystallization; the nucleation temperature is 700 ℃, and the nucleation time is 70 min; the crystallization temperature is 810 ℃, and the crystallization time is 100 min;
(4) annealing: and (5) cooling and annealing the furnace to room temperature, taking the glass-ceramic sample out of the furnace, and cutting, grinding and polishing the obtained glass-ceramic sample to obtain the coffee-colored glass-ceramic stone.
Example 2
A coffee microcrystalline glass stone prepared from molybdenum tailings comprises the following raw materials: according to the mass percentage, the molybdenum tailings are 52 percent, the limestone is 26.7 percent, the dolomite is 8.6 percent, the silica sand is 4.0 percent, the sodium fluosilicate is 4.0 percent, the chromite powder is 3.1 percent, and the titanium dioxide is 1.6 percent.
A preparation method of coffee microcrystalline glass stone prepared from molybdenum tailings comprises the following steps:
(1) preheating: uniformly mixing molybdenum tailings, limestone, dolomite, silica sand, sodium fluosilicate, ferrochromium mineral powder and titanium dioxide, pouring into a quartz crucible preheated to 850 ℃, and placing in a high-temperature furnace with the same temperature as the quartz crucible for heat preservation for 30min to fully preheat the mixture;
(2) and (3) melt molding: heating the preheated raw materials to 1500 ℃ at the speed of 10 ℃/min, preserving the heat for 2 hours, pouring the obtained molten glass liquid on a mould, and performing compression molding;
(3) nucleation and crystallization: putting the formed glass liquid into a furnace for nucleation and crystallization; the nucleation temperature is 720 ℃, and the nucleation time is 55 min; the crystallization temperature is 830 ℃, and the crystallization time is 75 min;
(4) annealing: and after the crystallization treatment is finished, cooling and annealing the glass-ceramic sample to room temperature in a kiln, taking the glass-ceramic sample out of the kiln, and cutting, grinding and polishing the obtained glass-ceramic sample to obtain the coffee-colored glass-ceramic stone.
Example 3
A coffee microcrystalline glass stone prepared from molybdenum tailings comprises the following raw materials: 53 percent of molybdenum tailings, 27 percent of limestone, 8.0 percent of dolomite, 3.0 percent of silica sand, 4.5 percent of sodium fluosilicate, 3.0 percent of ferrochromium ore powder and 1.5 percent of titanium dioxide.
A preparation method of coffee microcrystalline glass stone prepared from molybdenum tailings comprises the following steps:
(1) preheating: uniformly mixing molybdenum tailings, limestone, dolomite, silica sand, sodium fluosilicate, ferrochromium mineral powder and titanium dioxide, pouring the mixture into a quartz crucible preheated to 900 ℃, and placing the quartz crucible in a high-temperature furnace with the same temperature as the quartz crucible for heat preservation for 25min to fully preheat the mixture;
(2) and (3) melt molding: heating the preheated raw materials to 1510 ℃ at the speed of 10 ℃/min, preserving the heat for 2 hours, pouring the obtained molten glass liquid on a mould, and performing compression molding;
(3) nucleation and crystallization: putting the formed glass liquid into a furnace for nucleation and crystallization; the nucleation temperature is 740 ℃, and the nucleation time is 40 min; the crystallization temperature is 860 ℃, and the crystallization time is 50 min;
(4) annealing: and after the crystallization treatment is finished, cooling and annealing the glass-ceramic sample to room temperature in a kiln, taking the glass-ceramic sample out of the kiln, and cutting, grinding and polishing the obtained glass-ceramic sample to obtain the coffee-colored glass-ceramic stone.
Comparative example 1
A coffee microcrystalline glass stone prepared from molybdenum tailings comprises the following raw materials: according to mass percentage, the molybdenum tailings are 51.5%, the limestone is 26.8%, the dolomite is 8.6%, the silica sand is 5.2%, the sodium fluosilicate is 4.2%, the chromite powder is 2.1%, and the titanium dioxide is 1.6%.
The preparation method of the coffee microcrystalline glass stone prepared from the molybdenum tailings comprises the following steps:
(1) preheating: uniformly mixing molybdenum tailings, limestone, dolomite, silica sand, sodium fluosilicate, ferrochromium mineral powder and titanium dioxide, pouring into a quartz crucible preheated to 800 ℃, and placing in a high-temperature furnace with the same temperature as the quartz crucible for heat preservation for 30min to fully preheat the mixture;
(2) and (3) melt molding: heating the preheated raw materials to 1490 ℃ at the speed of 10 ℃/min, preserving the heat for 2 hours, pouring the obtained molten glass liquid on a mould, and performing compression molding;
(3) nucleation and crystallization: putting the formed glass liquid into a furnace for nucleation and crystallization; the nucleation temperature is 720 ℃, and the nucleation time is 70 min; the crystallization temperature is 810 ℃, and the crystallization time is 100 min;
(4) annealing: and (4) cooling and annealing the furnace to room temperature, taking the glass ceramics out of the furnace, and cutting, grinding and polishing the obtained glass ceramics sample to obtain the coffee and light green mixed glass ceramics stone.
Comparative example 2
A coffee microcrystalline glass stone prepared from molybdenum tailings comprises the following raw materials: 53.0 percent of molybdenum tailings, 28.2 percent of limestone, 9.0 percent of dolomite, 6.0 percent of silica sand, 1.8 percent of sodium fluosilicate, 1.0 percent of ferrochromium ore powder and 1.0 percent of titanium dioxide by mass percent.
The preparation method of the coffee microcrystalline glass stone prepared from the molybdenum tailings comprises the following steps:
(1) preheating: uniformly mixing molybdenum tailings, limestone, dolomite, silica sand, sodium fluosilicate, ferrochromium mineral powder and titanium dioxide, pouring into a quartz crucible preheated to 800 ℃, and placing in a high-temperature furnace with the same temperature as the quartz crucible for heat preservation for 30min to fully preheat the mixture;
(2) and (3) melt molding: heating the preheated raw materials to 1500 ℃ at the speed of 10 ℃/min, preserving the heat for 2 hours, pouring the obtained molten glass liquid on a mould, and performing compression molding;
(3) nucleation and crystallization: putting the formed glass liquid into a furnace for nucleation and crystallization; the nucleation temperature is 720 ℃, and the nucleation time is 60 min; the crystallization temperature is 830 ℃, and the crystallization time is 100 min;
(4) annealing: and (4) cooling and annealing the furnace to room temperature, taking the glass ceramics out of the furnace, and cutting, grinding and polishing the obtained glass ceramics sample to obtain the grey microcrystalline glass stone.
Test examples Performance test
Observing the color of the microcrystalline glass in the sun, and observing the crystallization condition of the section of the microcrystalline glass; the detection of the bending strength is carried out according to the JC/T872-2019 relevant regulation, a plurality of common microcrystalline glass samples are selected as a comparison, and the results are shown in the table 1;
TABLE 1 results of Performance test of samples
According to experimental data, the microcrystalline glass stone prepared by the method has high bending strength and better bending resistance than common microcrystalline glass, and the microcrystalline glass stone with uniform coffee color can be obtained under the condition that a large amount of molybdenum tailings are adopted in the formula. Compared with the examples, the content of the ferrochrome mineral powder added in the comparative example 1 is too low, the bending strength of the microcrystalline glass stone finally prepared is slightly low, and the color of the microcrystalline glass is not uniform. The content of the ferrochromium ore powder, the sodium fluosilicate and the titanium dioxide added in the comparative example 2 is too low, the crystallization degree of the finally prepared microcrystalline glass stone is poor, the bending strength is greatly reduced after quenching and quick heating by comparing the microcrystalline glass stone with the samples in the same batch, and the color of the microcrystalline glass is grey.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The coffee microcrystalline glass stone prepared from the molybdenum tailings is characterized by comprising the following raw materials: according to the mass percentage, the molybdenum tailings are 50-53%, the limestone is 26-27%, the dolomite is 8-9%, the silica sand is 3-5.5%, the sodium fluosilicate is 4-4.5%, the chromite powder is 3-3.5%, and the titanium dioxide is 1.5-1.8%.
2. The coffee-colored glass-ceramic stone prepared from the molybdenum tailings as claimed in claim 1, which comprises the following raw materials: according to the mass percentage, the molybdenum tailings are 52 percent, the limestone is 26.7 percent, the dolomite is 8.6 percent, the silica sand is 4.0 percent, the sodium fluosilicate is 4.0 percent, the chromite powder is 3.1 percent, and the titanium dioxide is 1.6 percent.
3. The coffee-colored glass-ceramic stone prepared from the molybdenum tailings as claimed in claim 1, wherein the molybdenum tailings comprise the following chemical components in percentage by mass: SiO 22：69～72％，Al2O3：12～15％，CaO：2～4％，MgO：2.5～4.5％，Na2O：1.5～2.5％，K2O：2.5～4.5％，Fe2O3：1～3％，TiO2：0～0.5％，SO3: 0.3-1.2%, and other impurities: less than or equal to 1 percent.
4. The method for preparing the coffee-colored glass-ceramic stone material prepared from the molybdenum tailings as claimed in any one of claims 1 to 3, comprising the following steps:
(1) preheating: uniformly mixing molybdenum tailings, limestone, dolomite, silica sand, sodium fluosilicate, ferrochromium mineral powder and titanium dioxide, pouring the mixture into a preheated quartz crucible, and placing the quartz crucible in a high-temperature furnace with the same temperature as the quartz crucible for heat preservation for 25-35 min to fully preheat the mixture;
(2) and (3) melt molding: heating the preheated raw materials to 1490-1510 ℃, preserving heat for 2 hours, pouring the obtained molten glass liquid on a mold, and performing compression molding;
(3) nucleation and crystallization: putting the formed glass liquid into a furnace for nucleation and crystallization;
(4) annealing: and after the crystallization treatment is finished, cooling and annealing the glass-ceramic sample to room temperature in a kiln, taking the glass-ceramic sample out of the kiln, and cutting, grinding and polishing the obtained glass-ceramic sample to obtain the coffee-colored glass-ceramic stone.
5. The method for preparing the coffee-colored microcrystalline glass stone prepared from the molybdenum tailings as claimed in claim 4, wherein the temperature of the quartz crucible in the step (1) is 800-900 ℃.
6. The method for preparing the coffee-colored glass-ceramic stone material from the molybdenum tailings as claimed in claim 4, wherein in the step (2), the temperature is increased at a rate of 10 ℃/min.
7. The method for preparing the coffee-colored glass-ceramic stone material from the molybdenum tailings as claimed in claim 4, wherein the nucleation temperature in the step (3) is 700-740 ℃, and the nucleation time is 40-70 min.
8. The method for preparing the coffee-colored glass-ceramic stone material from the molybdenum tailings as claimed in claim 4, wherein in the step (3), the crystallization temperature is 810-860 ℃, and the crystallization time is 50-100 min.
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