CN104046879B - Black ceramic material and preparation method thereof - Google Patents

Black ceramic material and preparation method thereof Download PDF

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CN104046879B
CN104046879B CN201410309800.1A CN201410309800A CN104046879B CN 104046879 B CN104046879 B CN 104046879B CN 201410309800 A CN201410309800 A CN 201410309800A CN 104046879 B CN104046879 B CN 104046879B
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tailings
ceramic material
magnetite
magnetic separation
titanium ore
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CN104046879A (en
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方民宪
李国伟
王能为
陈敏
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Panzhihua University
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Abstract

The present invention relates to a kind of black ceramic material and preparation method thereof, belong to field of inorganic nonmetallic material.The invention provides a kind of black ceramic material, with parts by weight, the composition of described black ceramic material comprises: Gr 2o 31.82-3.7 part, TiO 210.9-18.18 part, V 2o 51.94-4.13 part, MnO6.06-11.91 part, Fe 2o 38-14 part, Ni0.001-0.01 part, SiO 212-24.3 part.Black ceramic material of the present invention, with milltailings and tailings in vanadium extraction for raw material sinters porcelain into, the sunlight absorption rate of the black ceramic material of gained is 0.85 ~ 0.90.

Description

Black ceramic material and preparation method thereof
Technical Field
The invention relates to a black ceramic material and a preparation method thereof, belonging to the field of inorganic non-metallic materials.
Background
The method for effectively and comprehensively utilizing the ore dressing tailings remained after separating the iron concentrate and the titanium concentrate from the vanadium titano-magnetite in China is adopted and selected, and the vanadium titano-magnetite is piled up as waste, so that the environment is polluted, and a large amount of land is occupied.
The vanadium extraction tailings (vanadium extraction tailings are obtained by using vanadium titano-magnetite as a raw material, vanadium salt is extracted from the vanadium slag, and the residual residues are called vanadium extraction tailings) are also a large amount of stacked industrial waste, and contain 32-37% of iron, so that more methods are available for comprehensive utilization of the vanadium extraction tailings. For example, in patent application publication No. CN86104984A, entitled "a ceramic powder", the method for producing a black ceramic material disclosed in document [1], includes crushing the vanadium extraction tailings to less than 20 meshes, adding or not adding additives, calcining at 1000-1400 ℃ for 1-60 minutes, and crushing the calcined product to less than 20 meshes to obtain the black ceramic powder material. Also, as disclosed in document [2], publication No. CN102910892A, entitled "black ceramic plate prepared from natural minerals and vanadium extraction tailings and method for preparing the same", the method for preparing black ceramic plate comprises drying, dehydrating, crushing and sieving 0-10 wt% of the vanadium extraction tailings, chromite and manganese oxide ore in a certain proportion to form a mixture, mixing the mixture with clay, feldspar, sand and other additives in a certain proportion to prepare a mud cake with a water content of 14-19%, forming the mud cake, drying and sintering to obtain black ceramic plate. Also, as disclosed in the patent application of document [3], publication No. CN101713007A, entitled "a process for producing sponge iron by deep reduction of vanadium extraction tailings", coal is used as a reducing agent, CaO is added as a slag former at the same time, the vanadium extraction tailings are deeply reduced at high temperature, and the reduced product is subjected to secondary grinding and secondary low-intensity magnetic separation to obtain sponge iron with iron grade greater than 90%. Also, as disclosed in patent application No. 4, publication No. CN101280361A, entitled "a method for treating vanadium extraction tailings", the method includes mixing vanadium extraction tailings with a carbon source to form a mixture, reducing the mixture at a high temperature, and magnetically separating the reduced product to obtain a magnetic product and a non-magnetic product, wherein the magnetic product is used for steel smelting, and the non-magnetic product is used for extracting vanadium and titanium.
The documents [1] and [2] have the advantages that the vanadium extraction tailings are made into black ceramics, the defects that iron in the vanadium extraction tailings is not utilized, and the document [2] is also added with chromite and manganese oxide ore, which wastes chromium and manganese resources. The documents [3] and [4] have the advantage of extracting iron from the vanadium tailings, and have the disadvantage that the slag remaining after iron extraction is not utilized. In addition, the magnetic separation method described in the document [4] can magnetically separate iron, manganese and chromium in the reduced vanadium extraction tailings, but only iron can be magnetically separated, and manganese and chromium are anti-ferromagnetic substances because the spins among atoms tend to be arranged in a reverse direction and the magnetic moments among atoms are mutually low, so that the magnetic separation of manganese and chromium by the magnetic separation method is impossible.
The vanadium-titanium ceramic can be used for manufacturing solar water heaters, solar roofs, far infrared radiation elements, building decorative plates and the like. The vanadium-titanium ceramic has low cost, long service life and high efficiency, and is combined with the scale and the yield of the existing ceramic industry in China, so that the vanadium-titanium ceramic is likely to be developed into an energy material for large-scale production. At present, vanadium-titanium ceramic is prepared through mixing vanadium extraction tailings in a certain proportion in common ceramic material, sintering to obtain ceramic, or coating vanadium extraction tailings slurry on the surface of common ceramic blank, and sintering to obtain ceramic.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a black ceramic material, which is sintered into ceramic by taking mineral dressing tailings and vanadium extraction tailings as raw materials, and the sunlight absorption rate of the obtained black ceramic material is 0.85-0.90.
The technical scheme of the invention is as follows:
the invention provides a black ceramic material which comprises the following components in parts by weight:
Gr2O31.82-3.7 parts of TiO210.9-18.18 parts of V2O51.94-4.13 parts of Mn, 6.06-11.91 parts of Mn, Fe2O38-14 parts of Ni0.001-0.01 part of SiO212-24.3 parts.
The black ceramic material is prepared by sintering magnetic separation tailings and vanadium-titanium magnetite titanium ore tailings serving as raw materials into ceramic, wherein the weight ratio of the magnetic separation tailings to the vanadium-titanium magnetite titanium ore tailings is as follows: 2-10: 1; the magnetic separation tailings are prepared by the following method: uniformly mixing vanadium extraction tailings, a carbonaceous reducing agent, iron powder, lime and a sodium salt solution to prepare pellets, drying and reducing the pellets, crushing and magnetically separating the pellets to obtain reduced iron powder and magnetically separated tailings, wherein the use amount of each raw material is as follows: the vanadium extraction tailings comprise, by 100 parts, carbonaceous reducing agents (calculated by carbon content) 10.5-25% of the weight of the vanadium extraction tailings, sodium salts 1-4% of the weight of the vanadium extraction tailings, iron powders 0-2% of the weight of the vanadium extraction tailings, and lime 0-8% of the weight of the vanadium extraction tailings.
Preferably, the dosage of each raw material is as follows: based on 100 parts of vanadium extraction tailings, the amount of a carbonaceous reducing agent (calculated by the carbon content thereof) is 15% of the weight of the vanadium extraction tailings, the amount of a sodium salt is 4% of the weight of the vanadium extraction tailings, the amount of an iron powder is 2% of the weight of the vanadium extraction tailings, and the amount of a lime is 7.5% of the weight of the vanadium extraction tailings.
Preferably, the particle size of the vanadium extraction tailings is 0.165-0.417 mm.
The carbonaceous reducing agent is at least one of coke, coal, carbon black and charcoal.
Preferably, the particle size of the carbonaceous reducing agent is 0.25-0.05 mm.
The iron content in the iron powder is more than 90%.
Preferably, the particle size of the iron powder is 0.063-0.125 mm.
The sodium salt is Na2CO3、NaCl、Na2SO4At least one of them.
Preferably, the concentration of the sodium salt solution is 1.5-3 mol.L-1
The lime is hydrated lime, and the content of CaO is more than 66.45%.
In the preparation method of the magnetic separation tailings, the pellets are dried in the sun for 12-72 hours or are dried by keeping the temperature at 50-250 ℃ for 2-42 hours.
In the preparation method of the magnetic separation tailings, the pellets are reduced by adopting a reduction furnace, wherein the reduction furnace is a rotary hearth furnace, a tubular furnace or a muffle furnace.
Preferably, when the pellets are reduced in a muffle furnace, the periphery of the pellets should be filled with a carbonaceous reducing agent.
Preferably, the atmosphere of the pellets in the furnace is a non-oxidizing atmosphere so that the metal is not oxidized when the pellets are reduced.
In the preparation method of the magnetic separation tailings, the pellets are crushed into powder with the particle size of less than or equal to 0.165 mm.
In the preparation method of the magnetic separation tailings, the magnetic separation strength is 50-65mT (milli-Tesla).
Further, in the black ceramic, the raw materials also include common ceramic materials, and the weight ratio of the raw materials is as follows: the magnetic separation tailings are prepared from the following components in parts by weight: uniformly mixing vanadium extraction tailings, a carbonaceous reducing agent, iron powder, lime and a sodium salt solution to prepare pellets, drying and reducing the pellets, crushing and magnetically separating the pellets to obtain reduced iron powder and magnetically separated tailings, wherein the use amount of each raw material is as follows: the dosage of the vanadium extraction tailings is 100 parts, the dosage of the carbonaceous reducing agent (calculated by the carbon content thereof) is 10.5-25% of the weight of the vanadium extraction tailings, the dosage of the sodium salt is 1-4% of the weight of the vanadium extraction tailings, the dosage of the iron powder is 0-2% of the weight of the vanadium extraction tailings, and the dosage of the lime is 0-5% of the weight of the vanadium extraction tailings.
Preferably, the weight ratio of the raw materials is as follows: the ratio of the tailings of the titanium ore separation of the vanadium titano-magnetite to the tailings of the titanium ore separation of the common ceramic material is 2-6: 1: 0.0001-0.4.
The common ceramic material is at least one of Xigeda soil, ferrosilicon ash or bentonite.
Preferably, in the black ceramic, when the raw material is Xigeda soil, the tailings of the magnetic separation of the vanadium titano-magnetite and the tailings of the titanium separation ore are 2-6: 1.
Preferably, in the black ceramic, when the raw materials are silica fume and Xigeda soil, the tailings of the magnetic separation of the vanadium titano-magnetite and the tailings of the titanium ore are 3-10: 1.
Preferably, in the black ceramic, when the raw materials are silicon powder and bentonite, the tailings of the magnetic separation of the vanadium titano-magnetite titanium ore is 2-10: 1.
Preferably, in the black ceramic, when the raw material is Xigeda soil, the particle size is 0.074-0.165 mm.
Preferably, in the black ceramic, when the raw material is silica fume, the particle size is 0.074-0.165 mm.
Preferably, in the black ceramic, when the raw material is bentonite, the particle size is 0.061-0.074 mm.
The invention also provides a preparation method of the black ceramic material, which comprises the following steps: and uniformly mixing the magnetic separation tailings and the tailings of the titanium ore for vanadium titano-magnetite separation, performing ball milling until the particle size is 0.025-0.05mm to obtain a ball milling mixture, performing compression molding, sintering at 1000-1100 ℃ for 0.5-1 hour, and cooling to obtain the black ceramic material.
Further, after sintering and cooling, the mixture is crushed to 0.025-0.09mm to obtain black ceramic material powder.
The invention also provides the application of the tailings of the titanium ore dressing of the vanadium titano-magnetite, and the tailings of vanadium extraction are used as raw materials to prepare black ceramics, and the specific method comprises the following steps: the magnetic separation tailings and the tailings of the titanium ore dressing of the vanadium titano-magnetite are used as raw materials to be sintered into porcelain, and the weight ratio of the magnetic separation tailings to the tailings of the titanium ore dressing of the vanadium titano-magnetite is as follows: 2-10: 1; the magnetic separation tailings are prepared by the following method: uniformly mixing vanadium extraction tailings, a carbonaceous reducing agent, iron powder, lime and a sodium salt solution to prepare pellets, drying and reducing the pellets, crushing and magnetically separating the pellets to obtain reduced iron powder and magnetically separated tailings, wherein the use amount of each raw material is as follows: the dosage of the vanadium extraction tailings is 100, the dosage of the carbonaceous reducing agent (calculated by the carbon content) is 10.5-25% of the weight of the vanadium extraction tailings, the dosage of the sodium salt is 1-4% of the weight of the vanadium extraction tailings, the dosage of the iron powder is 0-2% of the weight of the vanadium extraction tailings, and the dosage of the lime is 0-5% of the weight of the vanadium extraction tailings.
The invention has the beneficial effects that:
1. the invention adopts the combined catalysis of sodium salt and iron powder, effectively reduces the reduction temperature, shortens the reduction time, reduces the energy consumption and improves the production efficiency.
2. Dissolving sodium salt in water, then uniformly mixing the sodium salt with a carbonaceous reducing agent, vanadium extraction tailings, iron powder and hydrated lime, uniformly mixing the mixture with a binder, and pressing the mixture into pellets; the mixing mode ensures that the sodium salt can be uniformly distributed in the vanadium extraction tailings, thereby fully ensuring the catalytic action of the sodium salt on the reduction of the vanadium extraction tailings.
3. The invention uses less sodium salt, the sodium salt is mixed evenly, and the pellet can not be collapsed or pulverized in the reduction process.
4. The invention comprehensively utilizes three industrial wastes of vanadium extraction tailings, mineral dressing tailings and silica fume, and the black porcelain taken out can be used for producing solar heat collection materials, and the iron powder produced by the black porcelain can be used for producing steel.
The invention combines the mineral processing tailings and the vanadium extraction tailings, not only extracts iron in the vanadium extraction tailings, but also combines non-magnetic substances generated after iron extraction with the mineral processing tailings to produce the black porcelain material, thereby achieving the purpose of completely utilizing the vanadium extraction tailings and the mineral processing tailings and thoroughly solving the pollution problem formed by the two types of slag.
The existing vanadium-titanium ceramic preparation method does not extract iron and gallium in the vanadium extraction tailings, and the resources in the vanadium extraction tailings are not fully utilized; the invention firstly carries out reduction magnetic separation treatment on the vanadium extraction tailings, extracts iron in the vanadium extraction tailings, dissolves gallium into iron crystal lattices to be extracted together with the iron, and can separate iron powder and gallium oxide by adopting an aqueous solution electrolysis method after the iron is extracted. The magnetic separation tailings generated by the magnetic separation are intermittently used for preparing the black porcelain powder, so that the vanadium extraction tailings are better utilized, and high-purity electrolytic iron powder and rare gallium oxide can be additionally generated. The invention also utilizes another two kinds of industrial waste residues which are difficult to treat, namely the tailings of the titanium ore dressing of the vanadium titano-magnetite and the ferrosilicon ash, thereby having the environmental-friendly social benefits of waste residue treatment and recycling economy. The sunlight absorptivity of the black porcelain material prepared by the invention is 0.85-0.90.
Detailed Description
The invention provides a black ceramic material which comprises the following components in parts by weight:
Gr2O31.82-3.7 parts of TiO210.9-18.18 parts of V2O51.94-4.13 parts of Mn, 6.06-11.91 parts of Mn, Fe2O38-14 parts of Ni0.001-0.01 part of SiO212-24.3 parts.
The black ceramic material is prepared by sintering magnetic separation tailings and vanadium-titanium magnetite titanium ore tailings serving as raw materials into ceramic, wherein the weight ratio of the magnetic separation tailings to the vanadium-titanium magnetite titanium ore tailings is as follows: 2-10: 1; the magnetic separation tailings are prepared by the following method: uniformly mixing vanadium extraction tailings, a carbonaceous reducing agent, iron powder, lime and a sodium salt solution to prepare pellets, drying and reducing the pellets, crushing and magnetically separating the pellets to obtain reduced iron powder and magnetically separated tailings, wherein the use amount of each raw material is as follows: the vanadium extraction tailings comprise, by 100 parts, carbonaceous reducing agents (calculated by carbon content) 10.5-25% of the weight of the vanadium extraction tailings, sodium salts 1-4% of the weight of the vanadium extraction tailings, iron powders 0-2% of the weight of the vanadium extraction tailings, and lime 0-8% of the weight of the vanadium extraction tailings.
Preferably, the dosage of each raw material is as follows: based on 100 parts of vanadium extraction tailings, the amount of a carbonaceous reducing agent (calculated by the carbon content thereof) is 15% of the weight of the vanadium extraction tailings, the amount of a sodium salt is 4% of the weight of the vanadium extraction tailings, the amount of an iron powder is 2% of the weight of the vanadium extraction tailings, and the amount of a lime is 7.5% of the weight of the vanadium extraction tailings.
The vanadium extraction tailings are the residues which are left after vanadium pentoxide is extracted by using vanadium slag generated in the process of smelting steel by using vanadium titano-magnetite as a raw material.
Preferably, the particle size of the vanadium extraction tailings is 0.165-0.417 mm. In the present invention, if the particle size is too large, the reduction time is too long, the material size is too small, and the molding is difficult by pressing.
The carbonaceous reducing agent is at least one of coke, coal, carbon black and charcoal.
Preferably, the particle size of the carbonaceous reducing agent is 0.25-0.05 mm. In the invention, the granularity is too large, the reduction time is too long, the material degree is too small, and the pressing is difficult to form.
The iron content in the iron powder is more than 90%.
Preferably, the particle size of the iron powder is 0.063-0.125 mm; the added iron powder has the function of generating metallic iron crystal seeds and has the combined catalytic action with sodium salt, so that the reduction efficiency is improved, and the reduction time is shortened; in the invention, the iron powder has too large particle size, is not easy to mix uniformly, cannot play a role of seed crystal, has too small particle size and too high surface energy, is oxidized in the air to form iron oxide, and also cannot play a role of seed crystal.
The sodium salt is Na2CO3、NaCl、Na2SO4At least one of (1); na (Na)2CO3、NaCl、Na2SO4The crystal lattice in the ferric oxide can be destroyed in the high-temperature reduction process, thereby playing the role of catalyzing the reduction of the ferric oxide.
Preferably, the concentration of the sodium salt solution is 1.5-3 mol.L-1
The lime is hydrated lime, and the content of CaO is more than 66.45%.
In the preparation method of the magnetic separation tailings, the pellets are dried in the sun for 12-72 hours or are dried by keeping the temperature at 50-250 ℃ for 2-42 hours.
Preferably, in the preparation method of the magnetic separation tailings, the pellets are dried in a drying mode of heat preservation at 100 ℃ for 12 hours.
In the preparation method of the magnetic separation tailings, the pellets are reduced by adopting a reduction furnace, wherein the reduction furnace is a rotary hearth furnace, a tubular furnace or a muffle furnace.
Preferably, when the pellets are reduced in a muffle furnace, the periphery of the pellets should be filled with a carbonaceous reducing agent.
Preferably, the atmosphere of the pellets in the furnace is a non-oxidizing atmosphere so that the metal is not oxidized when the pellets are reduced.
In the preparation method of the magnetic separation tailings, the pellets are crushed into powder with the particle size of less than or equal to 0.165 mm.
In the preparation method of the magnetic separation tailings, the magnetic separation strength is 50-65mT (milli-Tesla). If the strength is too low, the metallic iron obtained by reduction cannot be sufficiently separated, and if the strength is too high, the non-magnetic powder is carried out together with the surface of the metallic iron powder, so that the purpose of separation cannot be achieved.
Further, in the black ceramic, the raw materials also include common ceramic materials, and the weight ratio of the raw materials is as follows: the magnetic separation tailings are prepared from the following components in parts by weight: uniformly mixing vanadium extraction tailings, a carbonaceous reducing agent, iron powder, lime and a sodium salt solution to prepare pellets, drying and reducing the pellets, crushing and magnetically separating the pellets to obtain reduced iron powder and magnetically separated tailings, wherein the use amount of each raw material is as follows: the dosage of the vanadium extraction tailings is 100 parts, the dosage of the carbonaceous reducing agent (calculated by the carbon content thereof) is 10.5-25% of the weight of the vanadium extraction tailings, the dosage of the sodium salt is 1-4% of the weight of the vanadium extraction tailings, the dosage of the iron powder is 0-2% of the weight of the vanadium extraction tailings, and the dosage of the lime is 0-5% of the weight of the vanadium extraction tailings.
Preferably, the weight ratio of the raw materials is as follows: the ratio of the tailings of the titanium ore separation of the vanadium titano-magnetite to the tailings of the titanium ore separation of the common ceramic material is 2-6: 1: 0.0001-0.4.
The common ceramic material is at least one of Xigeda soil, ferrosilicon ash or bentonite.
Preferably, in the black ceramic, when the raw material is Xigeda soil, the tailings of the magnetic separation of the vanadium titano-magnetite and the tailings of the titanium separation ore are 2-6: 1.
Preferably, in the black ceramic, when the raw materials are silica fume and Xigeda soil, the tailings of the magnetic separation of the vanadium titano-magnetite and the tailings of the titanium ore are 3-10: 1.
Preferably, in the black ceramic, when the raw materials are silicon powder and bentonite, the tailings of the magnetic separation of the vanadium titano-magnetite titanium ore is 2-10: 1.
Preferably, in the black ceramic, when the raw material is Xigeda soil, the particle size is 0.074-0.165 mm.
Preferably, in the black ceramic, when the raw material is silica fume, the particle size is 0.074-0.165 mm.
Preferably, in the black ceramic, when the raw material is bentonite, the particle size is 0.061-0.074 mm.
The invention also provides a preparation method of the black ceramic material, which comprises the following steps: and uniformly mixing the magnetic separation tailings and the tailings of the titanium ore for vanadium titano-magnetite separation, performing ball milling until the particle size is 0.025-0.05mm to obtain a ball milling mixture, performing compression molding, sintering at 1000-1100 ℃ for 0.5-1 hour, and cooling to obtain the black ceramic material.
Further, after sintering and cooling, the mixture is crushed to 0.025-0.09mm to obtain black ceramic material powder.
The invention also provides the application of the tailings of the titanium ore dressing of the vanadium titano-magnetite, and the tailings of vanadium extraction are used as raw materials to prepare black ceramics, and the specific method comprises the following steps: the magnetic separation tailings and the tailings of the titanium ore dressing of the vanadium titano-magnetite are used as raw materials to be sintered into porcelain, and the weight ratio of the magnetic separation tailings to the tailings of the titanium ore dressing of the vanadium titano-magnetite is as follows: 2-10: 1; the magnetic separation tailings are prepared by the following method: uniformly mixing vanadium extraction tailings, a carbonaceous reducing agent, iron powder, lime and a sodium salt solution to prepare pellets, drying and reducing the pellets, crushing and magnetically separating the pellets to obtain reduced iron powder and magnetically separated tailings, wherein the use amount of each raw material is as follows: the dosage of the vanadium extraction tailings is 100, the dosage of the carbonaceous reducing agent (calculated by the carbon content) is 10.5-25% of the weight of the vanadium extraction tailings, the dosage of the sodium salt is 1-4% of the weight of the vanadium extraction tailings, the dosage of the iron powder is 0-2% of the weight of the vanadium extraction tailings, and the dosage of the lime is 0-5% of the weight of the vanadium extraction tailings.
Xigeda soil: the lithologic lower part mainly comprises conglomerate, and the mud is cemented by calcium and has complex components; the middle part is an interbedded layer of gray and variegated striped claystone and yellow fine sandstone, and the top part is purplish red thick layered calcareous claystone containing fossils such as coccinella, diatom and spore powder; the upper part is mainly yellow thick and huge thick layer fine sandstone, which is mixed with color stripe claystone and contains calcium tuberculosis.
Bentonite: analytical values: al (Al)2O3:16.54%、FeO:0.26%、SiO2:50.95%、Fe2O3:1.36%、MgO:4.65%、CaO:2.26%、K2O:0.47%、H2O:23.29%。
Silicon iron ash: SiO 22:96.66%。
The chemical components of the vanadium extraction tailings used in the following examples are: cr (chromium) component2O3=2.24%、TFe=32.8%、TiO2=12.90%、V2O5=2.08%、MnO=7.84%、SiO2=14.40%、Al2O3=3.20、CaO=2.50、MgO=3.57%、Na2O5.26% and S0.05%. The vanadium titano-magnetite titanium ore dressing tailings have the chemical composition as follows: TiO 22=4.16%、Fe=7.89%、S=0.04%、SiO245.61%, CaO 10.89%, MgO 8.12%, and the rest is 22.84%. The reducing agent coal dust comprises the following components: 86% of fixed carbon, 10.2% of ash and 5.3% of volatile matters. In the embodiment of the invention, the granularity of the vanadium extraction tailings is 0.165-0.417mm, the granularity of the carbonaceous reducing agent is 0.25-0.05 mm, and the granularity of the iron powder is 0.063-0.125 mm.
Example 1
Reduction and magnetic separation treatment of vanadium extraction tailings: weighing 1000g of vanadium extraction tailings, 105g of graphite powder and 200ml of sodium carbonate solution with the concentration of 1.87mol/L, and uniformly mixing; then pressing the mixture into pellets; drying at 100 ℃ for 12 hours, then putting the dried pellets into a tube furnace, and preserving heat at 1220 ℃ for 4 hours in a nitrogen atmosphere to obtain a metallization rate of 88.3%; the reduced pellets are crushed into powder with the particle size of 0.165mm, and the powder is selected next time with the magnetic induction intensity of 55mT to obtain the reduced iron powder and the nonmagnetic substance.
Calcining the titanium tailings at 1100 ℃ for 10min, and crushing the titanium tailings until the granularity is 0.198 mm.
Taking 100g of magnetic separation tailings, 50g of vanadium titano-magnetite titanium ore tailings and 10g of Xigeda soil, and uniformly mixing the three solid materials; ball milling for 8 hours in a ball mill; the obtained ball-milling mixture has the granularity of 0.045mm, the ball-milling mixture is formed by a pressing method, a forming blank is sintered for 0.5 hour at 1000 ℃, and then the sintered blank is crushed to 0.074mm to obtain black ceramic material powder, and the measured sunlight absorption rate of the black ceramic is 0.85.
Example 2
Reduction and magnetic separation treatment of vanadium extraction tailings: weighing 1000g of vanadium extraction tailings, 105g of graphite powder and 200ml of sodium carbonate solution with the concentration of 1.87mol/L, and uniformly mixing; then pressing the mixture into pellets; drying at 100 ℃ for 12 hours, then taking the dried pellets, and preserving the heat of the pellets in a tube furnace at 1220 ℃ for 4 hours in an argon atmosphere to obtain the metallization rate of 88.3 percent. The reduced pellets are crushed into powder with the particle size of 0.165mm, and the powder is selected next time with the magnetic induction intensity of 55mT to obtain the reduced iron powder and the nonmagnetic substance.
Calcining the titanium tailings at 1100 ℃ for 10min, and crushing the titanium tailings until the granularity is 0.198 mm.
And (3) uniformly mixing 200g of magnetic separation tailings, 50g of vanadium titano-magnetite titanium ore tailings and 10g of Xigeda soil. Ball milling for 10h in a ball mill; and (3) molding the ball-milling mixture by a pressing method, sintering the molded blank at 1075 ℃ for 1 hour, and then crushing the sintered blank to 0.074mm to obtain black ceramic material powder, wherein the sunlight absorption rate of the black ceramic is measured to be 0.85.
Example 3
Reduction and magnetic separation treatment of vanadium extraction tailings: weighing 1000g of vanadium extraction tailings, 150g of coal powder, adding 200ml of sodium carbonate solution with the concentration of 1.87mol/L, uniformly mixing, adding 75.25g of hydrated lime with the CaO content of 66.45%, and 20g of iron powder; then pressing the mixture into pellets, drying the pellets for 12 hours at 100 ℃, putting the dried pellets into a crucible, filling coal powder around the pellets, putting the pellets into a muffle furnace, and preserving heat for 3 hours at 1150 ℃ to obtain a metallization rate of 86.3%; the reduced pellets are crushed into powder with the particle size of 0.165mm, and the powder is selected next time under the magnetic induction intensity of 65mT to obtain the reduced iron powder and the nonmagnetic substance.
Calcining the titanium tailings at 1100 ℃ for 10min, and crushing the titanium tailings until the granularity is 0.198 mm.
Taking 200g of magnetic separation tailings, 50g of vanadium titano-magnetite titanium ore tailings, 10g of Xigeda soil and 10g of silica fume, and uniformly mixing the four solid materials; ball milling for 8 hours in a ball mill; and (3) molding the ball-milling mixture by a pressing method, sintering the molded blank at 1000 ℃ for 0.5 hour when the particle size of the obtained ball-milling mixture is 0.045mm, and then crushing the sintered blank to 0.074mm to obtain black ceramic material powder, wherein the measured sunlight absorption rate of the black ceramic is 0.85.
Example 4
Reduction and magnetic separation treatment of vanadium extraction tailings: weighing 1000g of vanadium extraction tailings, 150g of coal powder, adding 200ml of sodium carbonate solution with the concentration of 1.87mol/L, uniformly mixing, adding 75.245g of hydrated lime with the CaO content of 66.45% and 20g of iron powder; then pressing the mixture into pellets; drying at 100 ℃ for 12 hours, putting the dried pellets into a crucible, filling graphite powder around the pellets, putting the pellets into a muffle furnace, and preserving heat in the muffle furnace at 1150 ℃ for 3 hours to obtain a metallization rate of 86.3%; the reduced pellets are crushed into powder with the particle size of 0.165mm, and the powder is selected next time under the magnetic induction intensity of 65mT to obtain the reduced iron powder and the nonmagnetic substance.
Calcining the titanium tailings at 1100 ℃ for 10min, and crushing the titanium tailings until the granularity is 0.198 mm.
Taking 300g of magnetic separation tailings, 50g of vanadium titano-magnetite titanium ore tailings, 10g of Xigeda soil and 10g of silica fume, and uniformly mixing the four solid materials; ball-milling for 10h in a ball mill to obtain a ball-milled mixture with the granularity of 0.038mm, molding the ball-milled mixture by a pressing method, sintering the molded blank at 1100 ℃ for 0.5 h, and then crushing the sintered blank to 0.074mm to obtain black ceramic material powder, wherein the measured sunlight absorption rate of the black ceramic is 0.87.

Claims (20)

1. The black ceramic material is characterized by comprising the following components in parts by weight:
Cr2O31.82-3.7 parts of TiO210.9-18.18 parts of V2O51.94-4.13 parts of Mn, 6.06-11.91 parts of Mn, Fe2O38-14 parts of Ni0.001-0.01 part of SiO212-24.3 parts.
2. The black ceramic material according to claim 1, wherein the magnetic separation tailings and the vanadium titano-magnetite tailings are used as raw materials to be sintered into ceramic, and the weight ratio of the magnetic separation tailings to the vanadium titano-magnetite tailings is as follows: 2-10: 1; wherein,
the magnetic separation tailings are prepared by the following method: uniformly mixing vanadium extraction tailings, a carbonaceous reducing agent, iron powder, hydrated lime and a sodium salt solution to prepare pellets, drying and reducing the pellets, crushing and magnetically separating the pellets to obtain reduced iron powder and magnetically separated tailings, wherein the use amount of each raw material is as follows: the vanadium extraction tailings comprise, by 100 parts, 10.5-25% of carbonaceous reducing agent, 1-4% of sodium salt, 0-2% of iron powder and 0-8% of slaked lime, wherein the weight of the carbonaceous reducing agent is that of the vanadium extraction tailings.
3. The black ceramic material as claimed in claim 2, wherein in the preparation method of the magnetic separation tailings, the use amount of each raw material is as follows: the vanadium extraction tailings comprise, by 100 parts, 15% of carbonaceous reducing agent, 4% of sodium salt, 2% of iron powder and 7.5% of hydrated lime, wherein the weight of the carbonaceous reducing agent is that of the vanadium extraction tailings, and the weight of the sodium salt is that of the vanadium extraction tailings.
4. The black ceramic material according to claim 2 or 3,
the carbonaceous reducing agent is at least one of coke, coal, carbon black and charcoal, and the particle size of the carbonaceous reducing agent is 0.25-0.05 mm;
the sodium salt is Na2CO3、NaCl、Na2SO4At least one of the sodium salt solution, the concentration of the sodium salt solution is 1.5-3 mol.L-1
The granularity of the vanadium extraction tailings is 0.165-0.417 mm;
the iron content of the iron powder is more than 90%, and the particle size of the iron powder is 0.063-0.125 mm.
5. The black ceramic material according to claim 2 or 3, wherein in the preparation method of the magnetic separation tailings,
the pellets are dried in the sun for 12-72 hours or are dried by keeping the temperature at 50-250 ℃ for 2-42 hours;
reducing the pellets by using a reducing furnace, wherein the reducing furnace is a rotary hearth furnace, a tubular furnace or a muffle furnace;
the pellets are crushed into powder with the granularity less than or equal to 0.165 mm;
the magnetic separation strength is 50-65 mT.
6. The black ceramic material of claim 4, wherein in the preparation method of the magnetic separation tailings,
the pellets are dried in the sun for 12-72 hours or are dried by keeping the temperature at 50-250 ℃ for 2-42 hours;
reducing the pellets by using a reducing furnace, wherein the reducing furnace is a rotary hearth furnace, a tubular furnace or a muffle furnace;
the pellets are crushed into powder with the granularity less than or equal to 0.165 mm;
the magnetic separation strength is 50-65 mT.
7. The black ceramic material according to claim 2 or 3, wherein the raw materials further comprise a common ceramic material, and the weight ratio of each raw material is as follows: the ratio of the tailings of the titanium ore separation of the vanadium titano-magnetite to the tailings of the titanium ore separation of the common ceramic material is 2-10: 1: 0.0001-0.5.
8. The black ceramic material according to claim 4, wherein the raw materials further comprise a common ceramic material, and the weight ratio of the raw materials is as follows: the ratio of the tailings of the titanium ore separation of the vanadium titano-magnetite to the tailings of the titanium ore separation of the common ceramic material is 2-10: 1: 0.0001-0.5.
9. The black ceramic material according to claim 5, wherein the raw materials further comprise a common ceramic material, and the weight ratio of each raw material is as follows: the ratio of the tailings of the titanium ore separation of the vanadium titano-magnetite to the tailings of the titanium ore separation of the common ceramic material is 2-10: 1: 0.0001-0.5.
10. The black ceramic material according to claim 6, wherein the raw materials further comprise a common ceramic material, and the weight ratio of each raw material is as follows: the ratio of the tailings of the titanium ore separation of the vanadium titano-magnetite to the tailings of the titanium ore separation of the common ceramic material is 2-10: 1: 0.0001-0.5.
11. The black ceramic material according to claim 7, wherein the weight ratio of the raw materials is: the ratio of the tailings of the titanium ore separation of the vanadium titano-magnetite to the tailings of the titanium ore separation of the common ceramic material is 2-6: 1: 0.0001-0.4.
12. The black ceramic material according to any one of claims 8 to 10, wherein the weight ratio of the raw materials is: the ratio of the tailings of the titanium ore separation of the vanadium titano-magnetite to the tailings of the titanium ore separation of the common ceramic material is 2-6: 1: 0.0001-0.4.
13. The black ceramic material according to claim 7,
the common ceramic material is at least one of Xigeda soil, ferrosilicon ash or bentonite.
14. The black ceramic material according to any one of claims 8 to 11, wherein the common ceramic material is at least one of Xigeda soil, ferrosilicon ash or bentonite.
15. The black ceramic material according to claim 12, wherein the common ceramic material is at least one of jogeda soil, ferrosilicon ash, or bentonite.
16. The black ceramic material according to claim 13,
the common ceramic material is Xigeda soil as a raw material, and the ratio of magnetic separation tailings to vanadium titano-magnetite titanium ore tailings is 2-6: 1; or:
the common ceramic material comprises the raw materials of silica fume and Xigeda soil, and the ratio of the tailings of the magnetic separation to the tailings of the titanium ore of the vanadium titano-magnetite is 3-10: 1; or:
the common ceramic material comprises silicon powder and bentonite as raw materials, and the ratio of tailings of magnetic separation to tailings of titanium ore of vanadium titano-magnetite is 2-10: 1.
17. The black ceramic material according to claim 14,
the common ceramic material is Xigeda soil as a raw material, and the ratio of magnetic separation tailings to vanadium titano-magnetite titanium ore tailings is 2-6: 1; or:
the common ceramic material comprises the raw materials of silica fume and Xigeda soil, and the ratio of the tailings of the magnetic separation to the tailings of the titanium ore of the vanadium titano-magnetite is 3-10: 1; or:
the common ceramic material comprises silicon powder and bentonite as raw materials, and the ratio of tailings of magnetic separation to tailings of titanium ore of vanadium titano-magnetite is 2-10: 1.
18. The black ceramic material according to claim 15,
the common ceramic material is Xigeda soil as a raw material, and the ratio of magnetic separation tailings to vanadium titano-magnetite titanium ore tailings is 2-6: 1; or:
the common ceramic material comprises the raw materials of silica fume and Xigeda soil, and the ratio of the tailings of the magnetic separation to the tailings of the titanium ore of the vanadium titano-magnetite is 3-10: 1; or:
the common ceramic material comprises silicon powder and bentonite as raw materials, and the ratio of tailings of magnetic separation to tailings of titanium ore of vanadium titano-magnetite is 2-10: 1.
19. The preparation method of the black ceramic material according to any one of claims 7 to 18, wherein the magnetic separation tailings, the vanadium titano-magnetite tailings and the common ceramic material are mixed uniformly, ball-milled to a particle size of 0.025-0.05mm to obtain a ball-milled mixture, then the mixture is pressed and molded, and then sintered at 1000-1100 ℃ for 0.5-1 hour, and cooled to obtain the black ceramic material.
20. Use of tailings of a titanium-concentrating ore from vanadium titano-magnetite for the preparation of a black ceramic material according to any one of claims 2 to 18.
CN201410309800.1A 2014-07-01 2014-07-01 Black ceramic material and preparation method thereof Expired - Fee Related CN104046879B (en)

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CN1068091A (en) * 1991-06-29 1993-01-20 冶金工业部攀枝花钢铁公司 The production method of material for colour ceramic product and goods thereof
CN1559976A (en) * 2004-03-01 2005-01-05 吕健明 Production method of ceramics product with black blank
CN101153749A (en) * 2006-09-29 2008-04-02 山东天虹弧板有限公司 Method for compounding solid netted black porcelain sunlight absorbing layer on ceramic solar panel

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Publication number Priority date Publication date Assignee Title
CN1068091A (en) * 1991-06-29 1993-01-20 冶金工业部攀枝花钢铁公司 The production method of material for colour ceramic product and goods thereof
CN1559976A (en) * 2004-03-01 2005-01-05 吕健明 Production method of ceramics product with black blank
CN101153749A (en) * 2006-09-29 2008-04-02 山东天虹弧板有限公司 Method for compounding solid netted black porcelain sunlight absorbing layer on ceramic solar panel

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