The mixture for the manufacture of refractories with an irregular grain structure
(57) Abstract:The invention: the invention relates to the technology of refractories that can be used in ferrous and nonferrous metallurgy, glass, chemical and other industries. The mixture for the manufacture of refractories with an irregular grain structure that includes 40-60% granular mellitusdisease filler fractions of more than 0.5 mm, and the rest - it aluminosilicate and zirconite components of fraction less than 0.09 mm in the form of a mixture of a joint grinding, the mixture of a joint grinding has the following composition, %: mellitusdisease filler - 40-70, fire clay or kaolin - 20-30, zirconium dioxide - the rest (but not less than 10), and the ratio of free SiO2/ZrO2= 0,7-0,5. The cooked mass is pressed and calcined at a temperature of 1400-1500oC. 1 table. The invention relates to the technology of refractories that can be used in ferrous and nonferrous metallurgy, glass, chemical and other industries.Known mixture for the manufacture of refractories used in continuous casting of steel containing refractory clay, chamotte, obessilennyj zircon, in the following ratio, megatonne on the basis of this charge are much more linear shrinkage and low high-temperature strength due to the presence of a large number of glass rim and the lack of direct links between the crystals.Known composition for the manufacture of refractory products  containing clay, refractory clay and additives (zirconium dioxide), in the following ratio, wt. fireclay 45-70; fire clay 15-30; addition of 10-40. Given the charge has the same drawbacks as the charge 
Closest to the proposed charge on a set of attributes [3, prototype] is a composition for the manufacture of refractory articles comprising 35-45% granular mulitlateral filler (clay) fractions up to 3 mm and the rest is fine-grained refractory bunch of particles less than 0,088 mm In the composition of the refractory chords come in, wt.Mulitlateral filler (clay) 15 50
Refractory clay 25 30
Zirconium oxide containing 5-30% Zirconia 20 - 60.The shortcoming of the above mixture is continuous grain composition: grain filler fraction 3-0 mm, fine-grained refractory ligament fraction 0-0,088 mm Continuous grain structure makes the seal press powders in forming due to the presence of medium fraction 0,088-0.5 mm, which impede the convergence of the coarse grains of the filler and the distribution between fine-grained bundles. Consequently deteriorate such display is s, in comparison with the prototype, eliminates the inherent disadvantages: high porosity and low strength. This result is achieved by the fact that in the charge for the manufacture of refractories with discontinuous grain composition contains (wt.): 40-60% granular mulitlateral filler fraction > 0.5 mm, and the rest of it aluminosilicate and zirconite components fraction < 0.09 mm in the form of a mixture of a joint grinding, the mixture of a joint grinding has the following composition:
Mulitlateral filler 40 70
Refractory clay or kaolin 20 30
The Zirconia else
(but not less than 10)
and the ratio of free SiO2/ZrO20,7 0,5.An example of a mixture for the manufacture of refractories with an irregular grain structure.Mullitokorundovye the clay fraction 3-0,5 mm 50% hydrate the clay slurry (density not less than 1.2 g/cm3), mix and add the mixture of a joint grinding composition, wt. mullitokorundovye fireclay - 58, kaolin 25, Zirconia 17.With this composition of the mixture components of a joint grinding ratio of SiO2/ZrO20,6 (SiO2unrelated to the mullite).Mix joint grinding produced in the same SiO2in zircon, is calculated as follows: kaolin contains, in wt. Al2O340, SiO256. In a mixture of a joint grinding: 400,25= 10% Al2O3, 560,25=14% SiO2. Part of SiO2will go to the formation of mullite. The ratio of the mullite Al2O3/SiO22,55 SiO210/2,55 to 3.92% Remains unbound SiO214 3,93 10,08% For binding such quantity of SiO2in zircon at a ratio of SiO2/ZrO20,5 need 10,08/0,5 20,16% ZrO2but to create direct links between crystals of mullite and zircon, you must associate the zircon at least 70% unrelated SiO2for this purpose it is necessary 20,160,7 14,11% ZrO2. Therefore, in this example, ZrO2taken in sufficient quantities to create in the refractories direct links between crystals of mullite and zircon, and the ratio of free SiO2/ZrO20,6.The table presents the source components for different compositions of the mixture and the properties of the samples.Calcined product at a temperature of 1400 to 1500oC. The mixture for the manufacture of refractories with an irregular grain structure that includes granular mulitlateral filler fractions of more than 0.5 mm and fine-grained refractory component, characterized in that the bundle contains refractory clay or kaolin in the following ratio, wt.Mulitlateral filler 40 70
Refractory clay or kaolin 20 30
The Zirconia Else ( but not less than 10)
when the ratio of free SiO2/ZrO2of 0.5 to 0.7, and the ratio of components in the mixture the following, wt.Granular mulitlateral filler fractions of more than 0.5 mm 40 60
A bunch of the specified structure Ostalnoe
FIELD: decorative facing materials used in construction engineering.
SUBSTANCE: proposed decorative facing material includes broken glass, water glass, chamotte and caustic magnesite at the following ratio of components, mass-%: broken glass, 1.5-25.0; water glass, 5.0-7.0; chamotte, 63.0-73.0; caustic magmesite, 5.0-7.0.
EFFECT: enhanced strength of decorative facing material.
FIELD: composition of concrete mixes; manufacture of building materials.
SUBSTANCE: proposed concrete mix contains the following constituents, mass-%: fire clay, 5-10; alkali, 4-6; water, 8-12; fly ash after burning of coal, 25-35; blast-furnace slag, 25-35; the remainder being chamotte.
EFFECT: enhanced strength of materials.
SUBSTANCE: refractory mixture contains refractory clay, kaolin, heteropolymer of salicylic acid with formaldehyde, lignosulphonates, sodium polyphosphate, chamotte and asbestine, given the following components ratio, wt%: refractory clay - 20.-25.0; kaolin -10.0-15.0; heteropolymer of salicylic acid with formaldehyde, - 0.1-0.2; lignosulphonates - 0.3-0.5; sodium polyphosphate- 0.1-0.2; asbestine - 10.0-15.0; chamotte - the rest.
EFFECT: enhancing strength of the goods.
FIELD: fire-protection facility.
SUBSTANCE: invention is related to production of lightweight fire-resistant materials used in construction. Charge for preparation of lightweight fire-resistant material contains clay, pitch coke, polystyrene, borax, chamotte, lime and wastes of sulfuric acid production, at the following ratio of components, wt %: clay - 12.0-14.0; pitch coke - 15.0-19.0; polystyrene - 3.0-4.0; borax - 4.0-5.0; lime - 3.0-4.0; wastes of sulfuric acid production - 3.0-4.0; chamotte - the rest.
EFFECT: increased strength of lightweight fire-resistant material.
SUBSTANCE: manufacturing method of chamotte refractory products for pouring of heat-resistant alloys including preparation of charge, forming of products, its drying and annealing. Additionally after drying surface of products is applied by suspension, including filler in the form of corundum and binding agent in the form of 20-26% of colloidal solution of silica after what it is implemented repeated drying of products, and annealing of products is implemented at temperature 900-1000° during 4-6 hours. In suspension it is used corundum with dimension of grains from 50 up to 650 mcm, herewith mass rate of binding agent to filler is from 1:12 up to 1:4.
EFFECT: receiving of qualitative ingots from chamotte refractory products by means of forming on surface of chamotte product of corundum coating, allowing high adhesiveness to chamotte.
3 cl, 1 ex
SUBSTANCE: invention is related to manufacture of fire-resistant brick for tray of float bath, i.e. bath with tin in manufacture of sheet glass. Method for manufacture of fire-resistant brick for tray of float bath includes addition of potassium compound to clayey substance, containing the following oxides: 30-45 wt % AI2O3 and 50-65 wt % of SiO2, mixing, moulding, baking and then grinding of material for production of granulated fire-resistant material, mixing of granulated fire-resistant material, moulding into fire-resistant brick for float bath tray of required shape with further baking. Content of K2O in fine granulated fraction with grain size of less than 90 micrometre in specified granulated fire-resistant material is adjusted so that it makes 2-4%, and content of Na2O makes 1% the most.
EFFECT: moderation of reaction with Na2O from glass on surface of fire-resistant brick for prevention of its lamination.
9 cl, 2 ex, 1 tbl, 8 dwg
SUBSTANCE: invention relates to ceramic technology and can be used in making refractory fire clay and high-alumina articles for various purposes. The method of making aluminosilicate refractory articles involves preliminary roasting a raw mixture at 900-1200°C and preparation of a binder suspension therefrom, mixing fire clay aggregate in amount of 60-70% and ceramic binder suspension - the rest, moulding articles, drying and roasting.
EFFECT: high compression strength of articles.
1 ex, 3 tbl
SUBSTANCE: composition includes a chamotte filler, finely ground to specific surface of 2500-30000 cm2/g chamotte, cristobalite, water and a sodium silicate block in the form of nanosized particles. Additionally it contains the following components activated in a planetary mill - a chamotte filler, cristobalite and non-annealed chamotte clay, at the following ratio of components, wt %: chamotte filler 56-73; finely ground chamotte 6-10; finely ground cristobalite 4-8; finely ground non-annealed chamotte clay 4-6; activated chamotte filler 4-6; activated cristobalite 4-6; activated non-annealed chamotte clay 4-6; sodium silicate block in the form of nanosized particles 1-2; water based on B/T 0.12-0.14.
EFFECT: increased strength of products, simplified technology of manufacturing.
FIELD: refractory industry, in particular corundum parts for ferrous and non-ferrous metallurgy.
SUBSTANCE: on the step of batch preparation surface of fused corundum filler spheroid particles is damped with oleic or stearic acid in amount of 0.5-0.0 mass % in respect to total mass of phosphate binder. During agitation fine dispersed intergrinding mixture containing (mass %): Al2O3 47-80, ZrO2-SiO2 20-53, and phosphate binder (e.g. phosphoric acid or aluminum phosphate) is added. Batch contains (mass %): fused corundum filler 50-70; fine dispersed intergrinding mixture 30-50; phosphate binder over 100 % 5-10. Batch is homogenized, formed, solidified in air, baked at decomposition temperature of zircon concentrate, and cooled with isothermal holding at 1100-9000C.
EFFECT: corundum-based articles with improved strength and heat resistance.
7 cl, 2 tbl
FIELD: designs of glass melting furnaces.
SUBSTANCE: melt and cast materials on base of alumina-zirconium - silica contain, mass %: Al2 O3, 45 - 65; Zr02, 10.0 - 29.0;SiO2, 20.0 - 24.0 at relation SiO2/(Na2O + K2O), 4.5 - 8.0, the balance matters, 0.5 - 4.0. Such materials may be made of rejected products or from recovered waste materials and they may be used for making construction of glass melting furnaces, namely cross like members of regenerators.
EFFECT: lowered cost of raw materials, high operational properties of products.
11 cl, 4 tbl
FIELD: production of ceramic materials; methods of treatment of ceramics by high-temperature deformation; electrical engineering; mechanical engineering; manufacture of ceramic articles working at high temperatures under load.
SUBSTANCE: proposed method includes preparation of blank from ultra-dispersed powders of zirconium dioxide and aluminum oxide, preliminary sintering at temperature of 1300-1550C for no more than 1 h, high-temperature deformation at temperature of 1400-1600C and pressure of 3-10 Mpa and recrystallization annealing in vacuum at residual pressure of 5·10-5 mm Hg and temperature of 1500-1700C.
EFFECT: improved thermo-mechanical properties of ceramic articles.
3 cl, 3 ex
SUBSTANCE: invention pertains to production of fireproof products, mainly for glass-melting furnaces. The charge mixture consists of the following components in the given percentage mass ratios: ZrSiO4 8.5-10.5; Al2O3 72.0-75.0; TiO2 5.0-6.5; Cr2O3 5.5-7.0; ZnO 3.5-5.0; H3BO3 0.5-1.0. The products reach breaking point under pressure of 123-128 MPa, and have effective porosity of 0.15-0.2%.
EFFECT: increased durability and lower effective porosity of the products.
SUBSTANCE: invention pertains to composition of charge materials for production of stoves, thermal generating units, and metallurgical equipment. Charge material for production of refractory products contains the following components, wt %: mullite 31.0-34.0; corundum 30.0-32.0; kaolin 21.0-23.0; caustic magnesite 3.0-4.0; zircon 10.0-12.0.
EFFECT: enhanced heat stability of refractory products.
SUBSTANCE: method for production of heat resistant zircon-containing material includes mixing powder of zircon and aluminium represented by powder with fraction of less than 80 micrometre, in ball mill in liquid glass for 1-3 hours, moulding initial stocks and sintering at the temperature of 1600°C. Components in charge are in the following ratio, wt %: zircon concentrate 80-90, aluminium powder 10-20.
EFFECT: moulding certain phase composition in ceramic material, providing for high resistance to corrosion.
1 tbl, 3 dwg
SUBSTANCE: charge for production of an alloyed spinel material contains alumina, periclase, magnesium-alumina spinel, chrome oxide and zirconium dioxide, at the following ratio of components, wt %: alumina - 52.8-64.3; periclase - 22.7-25.2; magnesium-alumina spinel - 8.0-10.0; chrome oxide - 2.0-6.0; zirconium dioxide - 3.0-6.0. The alloyed spinel material contains a phase of alloyed spinel with the following composition Mg0.91-1.08(Al0.91-1.01Cr0.019-0.061)2O4 and phase of zirconium dioxide ZrO2, at the following ratio of phases, wt %: Mg0.91-1.08(Al0.91-1.01Cr0.019-0.061)2O4 - 94.0-97.0; ZrO2 - 3.0-6.0.
EFFECT: increased density and strength and reduced porosity of items.
2 cl, 5 ex, 1 tbl