CN114890775A - Furnace lining material of titanium slag smelting submerged arc furnace and preparation method thereof - Google Patents
Furnace lining material of titanium slag smelting submerged arc furnace and preparation method thereof Download PDFInfo
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- CN114890775A CN114890775A CN202210624004.1A CN202210624004A CN114890775A CN 114890775 A CN114890775 A CN 114890775A CN 202210624004 A CN202210624004 A CN 202210624004A CN 114890775 A CN114890775 A CN 114890775A
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- 239000000463 material Substances 0.000 title claims abstract description 256
- 239000002893 slag Substances 0.000 title claims abstract description 216
- 239000010936 titanium Substances 0.000 title claims abstract description 209
- 229910052719 titanium Inorganic materials 0.000 title claims abstract description 209
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 208
- 238000003723 Smelting Methods 0.000 title claims abstract description 203
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 270
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 135
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 105
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 104
- 239000010439 graphite Substances 0.000 claims abstract description 104
- 239000000843 powder Substances 0.000 claims abstract description 79
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 73
- 239000004327 boric acid Substances 0.000 claims abstract description 73
- 238000002156 mixing Methods 0.000 claims abstract description 42
- 239000002245 particle Substances 0.000 claims description 92
- 239000000203 mixture Substances 0.000 claims description 74
- 229910052742 iron Inorganic materials 0.000 claims description 51
- 239000006148 magnetic separator Substances 0.000 claims description 46
- 238000005303 weighing Methods 0.000 claims description 45
- 238000007885 magnetic separation Methods 0.000 claims description 33
- 239000000126 substance Substances 0.000 claims description 33
- 238000010438 heat treatment Methods 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000004576 sand Substances 0.000 claims description 16
- 238000012216 screening Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 5
- 230000035484 reaction time Effects 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 49
- 238000005260 corrosion Methods 0.000 abstract description 49
- 239000007788 liquid Substances 0.000 abstract description 22
- 238000009991 scouring Methods 0.000 abstract description 20
- 230000009970 fire resistant effect Effects 0.000 abstract description 2
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 118
- 230000003628 erosive effect Effects 0.000 description 47
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 46
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 46
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 45
- 229910052749 magnesium Inorganic materials 0.000 description 45
- 239000011777 magnesium Substances 0.000 description 45
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 30
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 30
- 229910052791 calcium Inorganic materials 0.000 description 30
- 239000011575 calcium Substances 0.000 description 30
- 229910052804 chromium Inorganic materials 0.000 description 30
- 239000011651 chromium Substances 0.000 description 30
- 238000012423 maintenance Methods 0.000 description 30
- 238000002844 melting Methods 0.000 description 30
- 230000008018 melting Effects 0.000 description 30
- 238000004519 manufacturing process Methods 0.000 description 20
- 230000009286 beneficial effect Effects 0.000 description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 18
- YDZQQRWRVYGNER-UHFFFAOYSA-N iron;titanium;trihydrate Chemical compound O.O.O.[Ti].[Fe] YDZQQRWRVYGNER-UHFFFAOYSA-N 0.000 description 18
- 230000003647 oxidation Effects 0.000 description 18
- 238000007254 oxidation reaction Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
- 150000002739 metals Chemical class 0.000 description 15
- 238000007873 sieving Methods 0.000 description 15
- 238000012360 testing method Methods 0.000 description 15
- 230000035515 penetration Effects 0.000 description 14
- 238000005245 sintering Methods 0.000 description 14
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
- 235000010215 titanium dioxide Nutrition 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
- C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
- C04B35/043—Refractories from grain sized mixtures
- C04B35/0435—Refractories from grain sized mixtures containing refractory metal compounds other than chromium oxide or chrome ore
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
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- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/62605—Treating the starting powders individually or as mixtures
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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- C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
- C04B2235/3886—Refractory metal nitrides, e.g. vanadium nitride, tungsten nitride
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- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
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Abstract
A furnace lining material of a titanium slag smelting submerged arc furnace and a preparation method thereof belong to the technical field of smelting furnaces, and the furnace lining material comprises, by mass, 60-90 parts of fused magnesia, 30-50 parts of high titanium slag, 20-30 parts of graphite micropowder and 0-5 parts of boric acid. The preparation method comprises the steps of mixing and smelting the high titanium slag and the graphite micro powder, mixing the high titanium slag and the graphite micro powder with the fused magnesia, and adding boric acid for modification to prepare the furnace lining material for the inner wall of the titanium slag smelting ore-smelting furnace. The furnace lining material solves the problems that the furnace lining in the prior art is low in fire-resistant temperature, poor in corrosion resistance and scouring resistance, and the slag line, the liquid drainage port and the position behind the electrode are eroded too fast, so that the service life of the whole submerged arc furnace is effectively prolonged, the cost is low, and the submerged arc furnace has good realizability and economic applicability.
Description
Technical Field
The invention belongs to the technical field of smelting furnaces, and particularly relates to a furnace lining material of a titanium slag smelting submerged arc furnace and a preparation method thereof.
Background
The Titanium Slag (Titanium Slag) is a dioxide smelted from Ilmenite (Ilmenite)Titanium (TiO) 2 ) The enrichment is commonly known as titanic iron ore which is heated and smelted by a submerged arc furnace, so that the titanium dioxide and iron in the titanic iron ore are melted and separated to obtain the enrichment with high titanium dioxide content. The titanium slag is neither waste slag nor by-product, but is high-quality raw material for producing titanium tetrachloride, titanium white and titanium sponge products.
The titanium slag smelting ore furnace is a special equipment for smelting titanium slag, and uses electric energy to smelt ilmenite (FeTiO) 3 ) Reduced to titanium slag (TiO) 2 ) And a semi-steel (Fe) smelting device.
The titanium slag smelting submerged arc furnace has the commonality of a common submerged arc furnace and the particularity of the furnace: 1. the working temperature of the titanium slag smelting submerged arc furnace needs to reach about 1800 degrees during refining and purification, which requires that the lining material has high temperature resistance; 2. along with the improvement of the level of smelting engineering in China, the power of the submerged arc furnace is improved year by year, and the higher power causes slag liquid (TiO) in the furnace 2 FeO, Fe, etc.) is more violent, which requires the furnace lining to have excellent erosion resistance; 3. in China, because of the existence of a peak-valley flat electrovalence system, the production of titanium slag mostly utilizes valley electricity and flat electricity to carry out intermittent production, so that the lining material is required to have certain oxidation resistance; 4. the slag liquid has stronger erosion capacity, so that the lining material is required to have certain slag erosion resistance; 5. the large-scale industrial production needs to meet production conditions and also needs to consider certain cost factors, so that certain economical efficiency of the lining material is required.
At present, neutral aluminum-based materials such as bauxite and corundum are adopted as furnace lining materials of the titanium slag smelting submerged arc furnace, and the furnace lining materials have the main defects that the fire-resistant temperature is low, the service life of the furnace is further influenced, more serious accidents such as furnace penetration accidents occur, and the production efficiency is also seriously influenced by frequent furnace repair. Also, acid silica-based materials, such as quartz sand, are used, which are much cooler in refractory due to slag liquid (TiO) 2 FeO, Fe, etc.) is somewhat alkaline and less durable than even neutral aluminum-based materials. In addition, the material made of basic magnesium-base shaped material, such as magnesia carbon brick, has high refractory temperature, can meet the requirement of smelting titanium slag, but has high costThe slag liquid line, the liquid discharge opening and the position behind the electrode are often eroded too fast, the local service life is short, and frequent maintenance is needed.
Disclosure of Invention
In order to overcome the defects of the furnace lining material in the prior art, the invention provides the furnace lining material of the titanium slag smelting submerged arc furnace and the preparation method thereof. The specific technical scheme is as follows:
a furnace lining material of a titanium slag smelting submerged arc furnace comprises the following raw materials in parts by weight: 60-90 parts of fused magnesia, 30-50 parts of high titanium slag, 20-30 parts of graphite micro powder and 0-5 parts of boric acid.
In the technical scheme, the furnace lining material is ramming material.
In the technical scheme, the MgO mass content of the fused magnesia is not less than 96 percent, and the Fe content is not less than 2 O 3 The mass content is less than or equal to 0.3 percent; the granularity of the fused magnesia is less than 5 mm.
In the technical scheme, the TiO of the high titanium slag 2 The mass content is more than or equal to 92 percent, and the mass content of TFe is less than or equal to 2 percent; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve.
In the technical scheme, the C mass content of the graphite micro powder is more than or equal to 99.5%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve.
In the above technical scheme, the boric acid H 3 BO 3 The mass content is more than or equal to 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use;
step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 30-50 parts of high titanium slag and 20-30 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at 2000-2500 ℃ for 3-6 h to obtain a smelting material B;
and 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use;
and 5: weighing 60-90 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
step 6: and weighing 0-5 parts of boric acid, adding the boric acid into the mixture D, and carrying out mixed reaction for 30-50 min to obtain the furnace lining material.
Compared with the prior art, the furnace lining material of the titanium slag smelting submerged arc furnace and the preparation method thereof have the beneficial effects that:
the furnace lining material comprises, by design, 60-90 parts of fused magnesia, 30-50 parts of high-titanium slag, 20-30 parts of graphite micropowder and 0-5 parts of boric acid, wherein the proportion of the high-titanium slag and the graphite micropowder is large, and the high temperature resistance and the corrosion resistance of the material can be obviously improved. In addition, 60-90 parts of fused magnesia is prepared, and an alkaline magnesium-based material is used as a main material, so that the manufacturing cost is low, and the slag liquid is alkaline to a certain extent, thereby being beneficial to improving the smelting quality of titanium slag and being resistant to scouring.
The preparation method of the invention demagnetizes the fused magnesia, can remove magnetic substances such as iron, and ensures the oxidation resistance of the material.
Thirdly, 30-50 parts of high titanium slag and 20-30 parts of graphite micropowder are smelted by the preparation method, the smelting temperature is 2000-2500 ℃, titanium carbide (TiC) and titanium nitride (TiN) with proper proportion can be obtained, the TiC and the TiN have extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, and the melting point of the titanium nitride is 2950 degrees), and the temperature can not be reached far in the normal smelting production process of the titanium slag, so that the smelted material has the effect of greatly improving the refractory temperature of the lining. In addition, in addition to beneficial elements of titanium and iron, the ilmenite is often accompanied with harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance and the scouring resistance of the lining material are improved.
Fourthly, the preparation method provided by the invention carries out magnetic separation on the smelting material, can remove iron reduced by the reaction of the high titanium slag and the graphite micropowder to the maximum extent, and improves the corrosion resistance and oxidation resistance of the material.
The preparation method of the invention is characterized in that boric acid is added in a certain proportion, and the boric acid participates in the mixing reaction, so as to modify the material, and the modified material is beneficial to the sintering of the furnace lining material of the ramming mass in a submerged arc furnace, thereby ensuring the scouring resistance.
The ramming furnace lining material can improve high temperature resistance and corrosion resistance, particularly can not be eroded too fast at the positions of a slag-liquid line, a slag outlet, an iron outlet and the back of an electrode, and prolongs the service life of the whole furnace lining material.
In conclusion, the lining material of the invention uses low-cost fused magnesia as a main material after demagnetization, combines high titanium slag and graphite micropowder to carry out smelting, crushing and demagnetization to obtain a high-temperature resistant smelting material with a specific proportion, can greatly enhance the high temperature resistance, scouring resistance, oxidation resistance and erosion corrosion resistance, finally uses boric acid to modify, is beneficial to sintering the lining material in a submerged arc furnace, ensures the scouring resistance, greatly prolongs the service life of the lining, tests for 1 year to show no erosion corrosion phenomenon, does not cause furnace penetration accidents, and does not need frequent maintenance on the positions of a furnace chamber, a furnace opening and the like. The furnace lining material has the advantages of low raw material cost, simple preparation method, and good realizability and economic applicability.
Detailed Description
The present invention will be further described with reference to specific examples, but the present invention is not limited to these examples.
Example 1
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 75 parts of fused magnesia, 40 parts of high titanium slag and 25 parts of graphite micropowderAnd 2.5 parts of boric acid. Wherein the MgO mass content of the fused magnesia is 97.8 percent, and the Fe 2 O 3 The mass content is 0.16%; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 94.2 percent of mass content and 1.2 percent of TFe mass content; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micropowder is 99.7%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve. Wherein, H of boric acid 3 BO 3 The mass content is 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 40 parts of high titanium slag and 25 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at 2050 ℃ for 5h to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, the melting point of the titanium nitride is 2950 degrees), and is far less than the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements of titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: weighing 75 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
step 6: and weighing 2.5 parts of boric acid, adding the boric acid into the mixture D, and carrying out mixed reaction for 40min to obtain the furnace lining material. The purpose of adding boric acid is to modify and facilitate sintering of the furnace lining material in a submerged arc furnace.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trial use, has no obvious erosion corrosion phenomenon for 1 year on trial use, does not have furnace penetrating accidents, does not need frequent maintenance on positions of a furnace chamber, a furnace opening and the like, and greatly saves maintenance time.
Example 2
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 60 parts of fused magnesia, 30 parts of high titanium slag, 20 parts of graphite micro powder and 1 part of boric acid. Wherein the MgO mass content of the fused magnesia is 96.8 percent, and the Fe 2 O 3 The mass content is 0.25%; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 95.2 percent of mass content and 0.8 percent of TFe mass content; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micro powder is 99.6%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve. Wherein, H of boric acid 3 BO 3 The mass content is 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micropowder with a sieve mesh of 200 meshes; weighing 30 parts of high titanium slag and 20 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at 2100 ℃ for 4h to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, the melting point of the titanium nitride is 2950 degrees), and is far less than the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements of titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: weighing 60 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
step 6: and weighing 1 part of boric acid, adding the boric acid into the mixture D, and carrying out mixing reaction for 45min to obtain the furnace lining material. The purpose of adding boric acid is to modify and facilitate sintering of the furnace lining material in a submerged arc furnace.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trial use, has no obvious erosion corrosion phenomenon after trial use for 6 months, does not have furnace penetration accidents, does not need frequent maintenance on positions of a hearth, a furnace opening and the like, and greatly saves maintenance time.
Example 3
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 90 parts of fused magnesia, 50 parts of high titanium slag, 30 parts of graphite micropowder and 3 parts of boric acid. Wherein the MgO mass content of the fused magnesia is 96.8 percent, and the Fe 2 O 3 The mass content is 0.11%; granularity of fused magnesite5 mm. Wherein the TiO of the high titanium slag 2 96.1 percent of mass content and 1.3 percent of TFe mass content; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micro powder is 99.8%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve. Wherein, H of boric acid 3 BO 3 The mass content is 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 50 parts of high titanium slag and 30 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at the heating temperature of 2300 ℃ for 3h to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, the melting point of the titanium nitride is 2950 degrees), and is far less than the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements of titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: weighing 90 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
step 6: and 3 parts of boric acid is weighed and added into the mixture D for mixing reaction for 30min to prepare the furnace lining material. The purpose of adding boric acid is to modify and facilitate sintering of the furnace lining material in a submerged arc furnace.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trial use, has no obvious erosion corrosion phenomenon after trial use for 6 months, does not have furnace penetration accidents, does not need frequent maintenance on positions of a hearth, a furnace opening and the like, and greatly saves maintenance time.
Example 4
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 60 parts of fused magnesia, 50 parts of high titanium slag, 30 parts of graphite micro powder and 4 parts of boric acid. Wherein the MgO mass content of the fused magnesia is 98.2 percent, and the Fe 2 O 3 The mass content is 0.13%; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 93.4 percent of mass content and 0.18 percent of TFe mass content; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micro powder is 99.6%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve. Wherein, H of boric acid 3 BO 3 The mass content is 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 50 parts of high titanium slag and 30 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at 2500 ℃ for 6h to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, the melting point of the titanium nitride is 2950 degrees), and is far less than the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements of titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: weighing 60 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
and 6: and weighing 4 parts of boric acid, adding the boric acid into the mixture D, and carrying out mixing reaction for 45min to obtain the furnace lining material. The purpose of adding boric acid is to modify and facilitate sintering of the furnace lining material in a submerged arc furnace.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trial use, has no obvious erosion corrosion phenomenon after trial use for 6 months, does not have furnace penetration accidents, does not need frequent maintenance on positions of a hearth, a furnace opening and the like, and greatly saves maintenance time.
Example 5
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 60 parts of fused magnesia, 30 parts of high titanium slag, 30 parts of graphite micropowder and 2 parts of boric acid. Wherein the MgO mass content of the fused magnesia is 98.5 percent, and the Fe 2 O 3 The mass content is 0.14%; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 93.6 percent of mass content and 1.1 percent of TFe mass content; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. WhereinThe C mass content of the graphite micro powder is 99.8 percent; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve. Wherein, H of boric acid 3 BO 3 The mass content is 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 30 parts of high titanium slag and 30 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at 2450 ℃ for 3.5h to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, the melting point of the titanium nitride is 2950 degrees), and is far less than the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements of titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: weighing 60 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
step 6: and weighing 2 parts of boric acid, adding the boric acid into the mixture D, and carrying out mixed reaction for 35min to obtain the furnace lining material. The purpose of adding boric acid is to modify and facilitate sintering of the furnace lining material in a submerged arc furnace.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trial use, has no obvious erosion corrosion phenomenon after trial use for 6 months, does not have furnace penetration accidents, does not need frequent maintenance on positions of a hearth, a furnace opening and the like, and greatly saves maintenance time.
Example 6
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 90 parts of fused magnesia, 50 parts of high titanium slag, 30 parts of graphite micropowder and 2.5 parts of boric acid. Wherein the MgO mass content of the fused magnesia is 97.6 percent, and the Fe 2 O 3 The mass content is 0.26%; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 The mass content is more than or equal to 92 percent, and the TFe mass content is 1.7 percent; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micropowder is 99.7%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve. Wherein, H of boric acid 3 BO 3 The mass content is 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 50 parts of high titanium slag and 30 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at 2350 deg.C for 4.5 hr to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, the melting point of the titanium nitride is 2950 degrees), and is far less than the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements of titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: weighing 90 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
step 6: and weighing 2.5 parts of boric acid, adding the boric acid into the mixture D, and carrying out mixed reaction for 30min to obtain the furnace lining material. The purpose of adding boric acid is to modify and facilitate sintering of the furnace lining material in a submerged arc furnace.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trial use, has no obvious erosion corrosion phenomenon for 1 year on trial use, does not have furnace penetrating accidents, does not need frequent maintenance on positions of a furnace chamber, a furnace opening and the like, and greatly saves maintenance time.
Example 7
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 90 parts of fused magnesia, 30 parts of high titanium slag, 30 parts of graphite micropowder and 1.5 parts of boric acid. Wherein the MgO mass content of the fused magnesia is 99.0 percent, and the Fe 2 O 3 The mass content is 0.06 percent; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 The mass content is 97.6 percent, and the TFe mass content is 0.06 percent; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micro powder is 99.8%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve. Wherein, H of boric acid 3 BO 3 The mass content is 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 30 parts of high titanium slag and 30 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at 2400 ℃ for 5.5 hours to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, the melting point of the titanium nitride is 2950 degrees), and is far less than the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements of titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: weighing 90 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
step 6: and weighing 1.5 parts of boric acid, adding the boric acid into the mixture D, and carrying out mixing reaction for 50min to obtain the furnace lining material. The purpose of adding boric acid is to modify and facilitate sintering of the furnace lining material in a submerged arc furnace.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trials, has no obvious erosion corrosion phenomenon after 5 months of trials, does not have furnace penetration accidents, does not need frequent maintenance on positions of a furnace chamber, a furnace opening and the like, and greatly saves maintenance time.
Example 8
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 80 parts of fused magnesia, 40 parts of high titanium slag, 25 parts of graphite micropowder and 2.5 parts of boric acid. Wherein the MgO mass content of the fused magnesia is 96.7 percent, and the Fe 2 O 3 The mass content is 0.28 percent; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 93.5 percent of mass content and 1.8 percent of TFe mass content; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micro powder is 99.6%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve. Wherein, H of boric acid 3 BO 3 The mass content is 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 40 parts of high titanium slag and 25 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at 2000 ℃ for 4h to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, the melting point of the titanium nitride is 2950 degrees), and is far less than the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements of titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: weighing 80 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
step 6: and weighing 2.5 parts of boric acid, adding the boric acid into the mixture D, and carrying out mixed reaction for 32min to obtain the furnace lining material. The purpose of adding boric acid is to modify and facilitate sintering of the furnace lining material in a submerged arc furnace.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trials, has no obvious erosion corrosion phenomenon after 5 months of trials, does not have furnace penetration accidents, does not need frequent maintenance on positions of a furnace chamber, a furnace opening and the like, and greatly saves maintenance time.
Example 9
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 80 parts of fused magnesia, 40 parts of high titanium slag, 30 parts of graphite micropowder and 1.5 parts of boric acid. Wherein the MgO mass content of the fused magnesia is 96 percent, and the Fe content 2 O 3 The mass content is 0.22%; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 92.6 percent of mass content and 1.5 percent of TFe mass content; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micro powder is 99.6%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve. Wherein, H of boric acid 3 BO 3 The mass content is 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 40 parts of high titanium slag and 30 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at 2110 ℃ for 3.5h to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, the melting point of the titanium nitride is 2950 degrees), and is far less than the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements of titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: weighing 80 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
step 6: and weighing 1.5 parts of boric acid, adding the boric acid into the mixture D, and carrying out mixed reaction for 40min to obtain the furnace lining material. The purpose of adding boric acid is to modify and facilitate sintering of the furnace lining material in a submerged arc furnace.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trials, has no obvious erosion corrosion phenomenon after 5 months of trials, does not have furnace penetration accidents, does not need frequent maintenance on positions of a furnace chamber, a furnace opening and the like, and greatly saves maintenance time.
Example 10
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 70 parts of fused magnesia, 50 parts of high titanium slag, 20 parts of graphite micropowder and 2.5 parts of boric acid. Wherein the MgO mass content of the fused magnesia is 97.8 percent, and the Fe 2 O 3 The mass content is 0.3 percent; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 92.2 percent of mass content and 1.0 percent of TFe mass content; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micropowder is 99.7%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve. Wherein, H of boric acid 3 BO 3 The mass content is 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 50 parts of high titanium slag and 20 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and 3, step 3: heating and smelting the mixture A at 2130 ℃ for 5h to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, the melting point of the titanium nitride is 2950 degrees), and is far less than the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements such as titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the furnace lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: weighing 70 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
step 6: and weighing 2.5 parts of boric acid, adding the boric acid into the mixture D, and carrying out mixed reaction for 35min to obtain the furnace lining material. The purpose of adding boric acid is to modify and facilitate sintering of the furnace lining material in a submerged arc furnace.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trial use, has no obvious erosion corrosion phenomenon after trial use for 6 months, does not have furnace penetration accidents, does not need frequent maintenance on positions of a hearth, a furnace opening and the like, and greatly saves maintenance time.
Example 11
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 70 parts of fused magnesia, 30 parts of high titanium slag, 25 parts of graphite micropowder and 4 parts of boric acid. Wherein the MgO mass content of the fused magnesia is 96.6 percent, and the Fe 2 O 3 The mass content is 0.23%; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 92% by mass and 0.09% by mass of TFe; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micropowder is 99.7%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve. Wherein, H of boric acid 3 BO 3 The mass content is 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 30 parts of high titanium slag and 25 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at 2200 ℃ for 6h to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, and the melting point of the titanium nitride is 2950 degrees), and can not reach the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements of titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: weighing 70 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
step 6: and weighing 4 parts of boric acid, adding the boric acid into the mixture D, and carrying out mixed reaction for 30min to obtain the furnace lining material. The purpose of adding boric acid is to modify and facilitate sintering of the furnace lining material in a submerged arc furnace.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trial use, has no obvious erosion corrosion phenomenon after trial use for 6 months, does not have furnace penetration accidents, does not need frequent maintenance on positions of a hearth, a furnace opening and the like, and greatly saves maintenance time.
Example 12
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 75 parts of fused magnesia, 40 parts of high titanium slag and 25 parts of graphite micropowder. Wherein the MgO mass content of the fused magnesia is 97.2 percent, and the Fe 2 O 3 The mass content is 0.2%; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 95.3 percent of mass content and 2 percent of TFe mass content; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micro powder is 99.6%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 40 parts of high titanium slag and 25 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at 2250 ℃ for 3h to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, the melting point of the titanium nitride is 2950 degrees), and is far less than the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements such as titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the furnace lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: and weighing 75 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to prepare the furnace lining material.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trial use, has no obvious erosion corrosion phenomenon after trial use for 6 months, does not have furnace penetration accidents, does not need frequent maintenance on positions of a hearth, a furnace opening and the like, and greatly saves maintenance time.
Example 13
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 90 parts of fused magnesia, 50 parts of high titanium slag and 25 parts of graphite micropowder. Wherein the MgO mass content of the fused magnesia is 98.2 percent, and the Fe 2 O 3 The mass content is 0.1%; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 The mass content is 97.6 percent, and the mass content of TFe is 1.7 percent; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micropowder is 99.5%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 50 parts of high titanium slag and 25 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at 2080 ℃ for 5.5 hours to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, and the melting point of the titanium nitride is 2950 degrees), and can not reach the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements of titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: and weighing 90 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to prepare the furnace lining material.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trial use, has no obvious erosion corrosion phenomenon after trial use for 6 months, does not have furnace penetration accidents, does not need frequent maintenance on positions of a hearth, a furnace opening and the like, and greatly saves maintenance time.
Example 14
A furnace lining material of a titanium slag smelting submerged arc furnace is a ramming material and comprises the following raw materials in parts by weight: 60 parts of fused magnesia, 50 parts of high titanium slag, 25 parts of graphite micro powder and 5 parts of boric acid. Wherein the MgO mass content of the fused magnesia is 96.1 percent, and the Fe content 2 O 3 The mass content is 0.27%; the granularity of the fused magnesia is less than 5 mm. Wherein the TiO of the high titanium slag 2 92.7 percent of mass content and 1.1 percent of TFe mass content; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve. Wherein the C mass content of the graphite micropowder is 99.5%; the granularity of the graphite micro powder is 200 meshes of sieve and the graphite micro powder passes through the sieve. Wherein, H of boric acid 3 BO 3 The mass content is 99.9 percent.
A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace, and comprises the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use; the basic magnesium-based material is used as the main material, and has the main purposes of low cost and certain alkalinity of slag liquid.
Step 2: screening the high titanium slag, wherein the mesh number of a screen is 200 meshes; sieving the graphite micro powder, wherein the mesh number of a screen is 200 meshes; weighing 50 parts of high titanium slag and 25 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A at the temperature of 2180 ℃ for 4h to obtain a smelting material B; the smelting material B is a mixture of titanium carbide (TiC) and titanium nitride (TiN), has extremely high refractory temperature (the melting point of the titanium carbide is 3140 degrees, the melting point of the titanium nitride is 2950 degrees), and is far less than the temperature in the normal smelting production process of the titanium slag. Besides beneficial elements such as titanium and iron, the ilmenite is often accompanied by harmful elements such as chromium, calcium and magnesium, and titanium nitride (TiN) does not react with metals such as iron, chromium, calcium and magnesium at high temperature, so that the corrosion resistance of the furnace lining material is improved.
And 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use; the smelting material B is crushed into particles which are 5mm and pass through completely, and the particles are magnetically separated by a magnetic separator, so that iron smelted and reduced is magnetically separated to the maximum degree, and the oxidation resistance is improved.
And 5: weighing 60 parts of demagnetized fused magnesia, and uniformly mixing the demagnetized fused magnesia with the demagnetized smelting particles C to obtain a mixture D;
step 6: and weighing 5 parts of boric acid, adding the boric acid into the mixture D, and carrying out mixing reaction for 50min to obtain the furnace lining material. The purpose of adding boric acid is to modify and facilitate sintering of the furnace lining material in a submerged arc furnace.
The furnace lining material of the embodiment has good effects through high temperature, erosion and stamping tests, has good high temperature resistance, erosion corrosion resistance and excellent scouring resistance through trial use, has no obvious erosion corrosion phenomenon after trial use for 6 months, does not have furnace penetration accidents, does not need frequent maintenance on positions of a hearth, a furnace opening and the like, and greatly saves maintenance time.
The summary of the process parameters of the above examples is as follows:
Claims (10)
1. the furnace lining material of the titanium slag smelting submerged arc furnace is characterized by comprising the following raw materials in parts by weight: 60-90 parts of fused magnesia, 30-50 parts of high titanium slag, 20-30 parts of graphite micro powder and 0-5 parts of boric acid.
2. The furnace lining material of the titanium slag smelting submerged arc furnace as claimed in claim 1, wherein the furnace lining material is ramming mass.
3. The lining material of the titanium slag smelting submerged arc furnace according to claim 1, wherein the MgO mass content of the fused magnesia is not less than 96%, and Fe 2 O 3 The mass content is less than or equal to 0.3 percent; the granularity of the fused magnesia is less than 5 mm.
4. The furnace lining material for the titanium slag smelting submerged arc furnace as claimed in claim 1, wherein the TiO of the high titanium slag 2 The mass content is more than or equal to 92 percent, and the mass content of TFe is less than or equal to 2 percent; the granularity of the high titanium slag is 200 meshes and the high titanium slag passes through the sieve.
5. The furnace lining material of the titanium slag smelting submerged arc furnace as claimed in claim 1, wherein the C mass content of the graphite micro powder is more than or equal to 99.5%; the granularity of the graphite micro powder is 200 meshes and the graphite micro powder passes through the sieve.
6. The method of claim 1The furnace lining material of the titanium slag smelting submerged arc furnace is characterized in that the boric acid H 3 BO 3 The mass content is more than or equal to 99.9 percent.
7. A preparation method of a furnace lining material of a titanium slag smelting submerged arc furnace, which is used for preparing the furnace lining material of the titanium slag smelting submerged arc furnace in the claim 1, and is characterized by comprising the following steps:
step 1: crushing the fused magnesia into sand grains with the grain size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized fused magnesia for later use;
step 2: respectively screening the high titanium slag and the graphite micropowder; weighing 30-50 parts of high titanium slag and 20-30 parts of graphite micro powder, and uniformly mixing to prepare a mixture A;
and step 3: heating and smelting the mixture A to obtain a smelting material B;
and 4, step 4: crushing the smelting material B into particles with the particle size of less than 5mm, and then carrying out magnetic separation by a magnetic separator to remove magnetic substances to prepare demagnetized smelting particles C for later use;
and 5: weighing 60-90 parts of demagnetized fused magnesia, and carrying out mixing reaction with the demagnetized fused magnesia and the demagnetized fused magnesia particles C to obtain a mixture D;
step 6: and weighing 0-5 parts of boric acid, adding the boric acid into the mixture D, and uniformly mixing to obtain the furnace lining material.
8. The method as claimed in claim 7, wherein in step 2, the mesh size of the screen is 200 meshes.
9. The method for preparing the furnace lining material of the titanium slag smelting submerged arc furnace according to the claim 7, wherein in the step 3, the heating and smelting temperature is 2000-2500 ℃, and the smelting time is 3-6 h.
10. The method for preparing the furnace lining material of the titanium slag smelting submerged arc furnace according to the claim 7, wherein in the step 6, the mixing reaction time is 30-50 min.
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