Refractory Raw Materials for BOF Taphole Slag Slide Gate Mechanism

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BOF taphole slag slide gate mechanism
Using the mechanism of BOF slag could recovery slag effectively in the furnace. And slag splashing protection technology could increase converter furnace which can solve the problem of irregular erosion in taphole. By the new process of slag controlled tapping , can improve the alloy yield, and can also greatly save the amount of aluminum addiction, the comprehensive cost reduction is considerable, and it also improved the economic efficiency and the competitiveness of the products in the market, it’s the first choice of equipment for smelting high quality steel.

Medium or high temperature sintered Sialon bonded sliding gate at N2 atmosphere
Independent research and development of new sliding gate by importing special sialon additives, sintering at the medium our high temperature of N2 atmosphere. In the process of sintering create the sialon phase with good medium or high temperature performance, thus improved the high temperature compression strength and the breaking strength. The using effect on the large and medium-sized steel ladle and the tundish is good.

Converter Tap Hole Stopping-Slag Slide Plate

Pure zirconia plate is inlayed in the important region of converter tap hole stopping-slag slide plate. The matrix is made of stable medium and high temperature AZC materials，which has long service life, excellent effects of stopping-slag.

Q: Who knows how many fire heat preservation material are there?: They can be divided into wood fire, steel fire and stainless steel fire. Wooden fireproofing material is light weight, easy for installation and second decoration, as well as all types of civil construction and some industrial buildings. It can be realized through inorganic insulation materials, such as glass wool, rock wool, foam glass etc.. The phenolic foam materials inside organic foam material is more special. Phenolic foam does not only have a good thermal insulation performance, but also can be combined with steel and other materials, to achieve a class A fire retardant level. Class A thermal insulation include: 1 thermal insulation materials with class A combustion performance Fire insulation materials of fire barrier zone can use class A material with class A combustion performance in rock (ore) cotton, foam glass, inorganic thermal insulation mortar.

Q: What are the models of refractory cables?: There are bout four types. 1.NA-YJV / NB-YJV Crosslinked polyethylene insulated PVC sheath A (B) class fire-resistant power cable 2.NA-YJV22 / NB-YJV22 Crosslinked polyethylene insulated steel belt braiding PVC sheath A (B) class fire-resistant power cable 3.WDNA-YJY / WDNB-YJY Crosslinked polyethylene insulated polyolefin sheath A (B) class low smoke no halogen fire retardant power cable 4.WDNA-YJY23 / WDNB-YJY23 Crosslinked polyethylene insulated steel belt braiding polyolefin sheath A (B) class low smoke no halogen fire retardant power cable

Q: How is grade of fire endurance divided?: Level of the building is classified according to the importance, fireproofing, durable life and etc. different angles. Civil buildings are classified according to the following ways: 1, It is divided into five grads according to its importance: A, AAA level: Buildings with great memorial, of historic, international and national level. B, A level: High-grade residential buildings and public buildings. C, B level: Intermediate residential buildings and public buildings. D, C class: Ordinary residential buildings and public buildings. 2, It can be classified into four types according to the fireproof performance: Fire resistance level of the buildings is divided into four levels. Standard of fire resistance level is decided based on the combustion performance and fire endurance of the main components of the building. 3, It can be classified into four levels according to the durable life: A, A level durable life is more than 100 years. It is applicable for important buildings and high buildings. B, B level has a endurance for 50 to 100 years and it is applicable for ordinary buildings. A, C level has a durable life of 25 to 50 years. It is applicable for less important buildings. B, D level has a lasting year of below 15 years and it is applicable for temporary buildings.

Q: What are the physical properties of refractory material?: The mechanical properties of refractory material include compressive strength, volume density and sclerosing, slag resistance, elastic modulus, thermal shock resistance, oxidation resistance, bibulous rate, fluidity, resilience, bond strength and slump, electrical conductivity, specific heat, heat capacity, the impact strength, linear change, torsional strength, stomatal aperture distribution, resistance to acid, etc. The use performance of refractory material include refractoriness, thermal emissivity, condensation, porosity, coefficient of thermal expansion. Thermal properties of refractory material include thermal conductivity, temperature conductivity, plasticity, the hydration resistance, creep performance. The physical properties of the refractory materials include structure performance, mechanical properties, shear strength, load softening temperature, CO erosion resistance. The structure properties of the refractory materials include porosity, alkali resistance and sintering. The operating performance of refractory material include consistency, tensile strength, the use performance and operating performance, wear resistance, bending strength, thermal properties.

Q: Fire rating of decoration materials: All light steel keel gypsum board is considered level A; if the wood finishes up to B2 grade fire rating depends on the proportion of the use of wood veneer and the proportion of this wood veneer fire grade, if the proportion of wood veneer is small,it can be considered level A

Q: The following statement is correct: artificial corundum has a high melting point and can be used as a high grade refractory material. The main component is silica dioxide: It's D,1. artificial corundum is mainly composed of three aluminium oxide two4, color glasses are not added cuprous oxide, silver halide is added

Q: What are the types of steel refractory materials: The major category is classified as permanent layer, working lining. Specific varieties: Air permeable brick (corundum). steel ladle brick (magnesia or corundum), permanent layer castable (high alumina), reinforcing material for ladle bottom, repair material for the edge of tank and so on.

Q: What are the construction fire-proof materials?: 1. fire?retardant?coating 2. fireproof?panel 3. fire proof and sealing material 4. flame resisting decorative materials 5. Green fire prevention materials

Q: How many kilns using refractories are needed? What are the furnaces respectively?: Kiln and five hundred-degree centigrade thermal equipment need to use refractories, glass furnaces, electric arc furnaces, mixer, cement rotary kiln, open hearth furnace and limestone kiln; in fact, when the temperature is more than four, the mesh belt furnace, blast furnace, cupola oven, stove, pushing plate kiln, furnace, heat treatment furnace, roller kiln, down draft kiln, ladle, coke, shuttle kiln,etc.