307 results about "Grog" patented technology

A high-porosity thin-wall cordierite-type cellular ceramics is prepared proportionally from LiO2, talc, kaolinite, calcined kaolinite, alpha-AlO, aluminum hydroxide, silicon powder, solid adhesive, and the liquid organic additive prepared from water, propanetriol, liquid adhesive, surfactant and lubricant. Its preparing process is also disclosed.

The invention relates to a low-heat conductance silicon corundum brick material and a silicon corundum composite brick made of the same, and belongs to the technical field of refractory materials. The low-heat conductance silicon corundum brick material comprises a liquid bonding agent and the following solid raw materials in parts by weight: 38-45 parts of bauxite chamotte granules with the content of Al2O3 of more than or equal to 87 percent by weight, 15-20 parts of silicon carbide powder with the content of SiC of more than or equal to 90 percent by weight and the content of free carbon of not less than 5 percent, 8-13 parts of electric smelting white corundum powder with the Al2O3 content of more than or equal to 99 percent by weight, 6-8 parts of andalusite powder with the Al2O3 content of more than or equal to 55 percent by weight, 3-5 parts of SiO2 ultramicro powder with SiO2 content of more than or equal to 95 percent by weight, 0.5-1 part of monatomic silicon ultramicro powder, 0.5-1 part of monatomic aluminum ultramicro powder, 3-5 parts of floating beads with the Al2O3 content of more than or equal to 30 percent by weight and the SiO2 content of more than or equal to 50 percent by weight and 8-10 parts of soft refractory clay with the Al2O3 content of more than or equal to 30 percent by weight. The silicon corundum composite brick made of the low-heat conductance silicon corundum brick material is obtained by carrying out double-surface mechanical pressing and burning on two materials, namely the low-heat conductance silicon corundum brick material and a heavy brick material. When the silicon corundum composite brick provided by the invention is used for building the transitional zone of a cement rotary kiln, the mean temperature of a cylinder body is low and is only 186 DEG C.

A corundum fireproof ball used for a ball-type hot-blast stove and a preparation method thereof are characterized in that the corundum fireproof ball comprises the following main materials, adhesive and additive, wherein the main materials comprises the following raw materials by weight percentage: 0-15% of corundum (granularity of 5-3mm), 30-60% of corundum (granularity of 3-1mm), 5-30% of corundum (granularity of 1-0.088mm), 0-10% of corundum (granularity less than 0.044mm), 10-25% of bauxite chamotte (granularity less than 0.088mm), 2-10% of Alpha-Al2O3 grain, 1-10% of zirconia-contained material, 2-8% of clay and 2-10% of mullite or materials containing mullite which is taken as main phase; the adding amount of the adhesive is 1-6% of the weight of the main materials; and the adding amount of the additive is 0-1% of the weight of the main materials. The preparation method comprises the following steps of ageing mixture, back-rolling, pressing and molding, drying billet, and sintering in a tunnel kiln and the sintering temperature is within 1450-1600 DEG C.

The invention belongs to the field of fireproof materials and relates to a method for preparing a novel compound lining material used in a blast furnace, in particular to a method for preparing a nonmetal compound lining material used in a furnace body of the blast furnace. The method comprises the following steps: using high-aluminum alumina chamotte, carborundum, metallic silicon powder, silicon ash and artificial graphite as main raw materials, using CA50 fireproof cement as a bonding agent, adding a right amount of admixture, and after mixing and smelting, injecting pulp into a relevant mould for moulding, curing for days and then stripping and baking to obtain the Al2O3-SiC-C compound lining material. The method is favorable to constructing special-shaped brick furnace linings at the weak positions of the furnace body, such as special-shaped edges, corners, holes and the like and enhancing the construction quality, and the whole furnace lining which has no seam after being poured and has uniform structure can not generate looseness and penetrating seams when being heated and used; the method prolongs the service life of the furnace lining, provides superior thermal insulation performance to the furnace body and obviously enhances the effect of energy saving. The compound lining material prepared by using the invention can be widely applied to the furnace abdomen, the furnace waist and the lower part of the furnace body of a smelting blast furnace.

The present invention relates to apparatus and process of reducing and roasting inorganic mineral in circular fluidized bed. The reducing and roasting process includes feeding the pretreated ore and coal material into the fluidizing section of the roasting furnace; providing burning air with the blower via the air chest and grid plate to the fluidizing section of the roasting furnace; collecting the flyash with the medium temperature insulating deduster from the exhaust of the roasting furnace and returning the flyash via the vertical pipe, the J-valve and the returning pipe to the fluidized bed; heat exchange of the exhaust from the medium temperature insulating deduster in the gas-gas heat exchanger to lower the temperature to 110-150 deg.c and further dedusting in bag deduster before exhausting; and discharging the roasted material via the side overflow pipe to the chamotte storage.

The invention provides cast ceramsites as well as a manufacture method and application thereof. In the method, bauxite clinker, kaolin and bauxite are used as raw materials; not only are the raw materials easy and convenient to obtain, but also a preparation process is simple, the energy consumption is low, the production efficiency is high and environmental protection treatment on production wastes is easy, so that the cost can be effectively reduced. At the same time, the cast ceramsites disclosed by the invention have high refractoriness, high strength, low thermal expansion coefficient and high repetitive utilization rate, not only meet the requirement of casting, but also can effectively reduce the casting cost.

The invention relates to a furnace body lining brick for the vertical furnace of a sintering pelletizing machine, and particularly relates to a preparation method of a silicon carbide abrasion-resistant fire-resistant furnace body lining brick. The preparation method comprises the following steps of blending; mixing; carrying out machine pressure forming; firing at high temperature; and adding antioxidant metallic silicon powder by taking phosphate as a bonding agent, taking sodium tripolyphosphate or sodium hexametaphosphate as a deflocculant and taking oxalic acid or citric acid as a inhibiting agent, wherein a main material comprises waste high-voltage electric porcelain or bauxite chamotte, electric melting brown fused alumina or bauxite chamotte, electric melting brown fused alumina or bauxite chamotte, SiC granules, fine SiC powder and fine high-quality clay powder, the grain size of the waste high-voltage electric porcelain or the bauxite chamotte is 1-3 mm, the grain size of the electric melting brown fused alumina or the bauxite chamotte is less than 1 mm, the grain size of the electric melting brown fused alumina or the bauxite chamotte is more than or equal to 300 meshes, and the grain size of the fine high-quality clay powder is more than or equal to 300 meshes. According to the furnace body lining brick, the usage temperature interval is 1100-1400 DEG C, the compressive strength is more than 60 Mpa, the apparent porosity is lower than 15%, the abrasion-resistant value is less than 5 cm<3>, and the thermal shock stability is tested through a water cooling method more than 20 times.