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The magnesia-calcium brick, also known as high calcium magnesite brick, is a kind of magnesial refractory material with periclase as principal crystalline phase and tricalcium silicate as secondary phase.It contains 80 % ~ 87% MgO, 6 % ~ 9% CaO, CaO/SiO2 ratio is between 2.2 ~ 3.0.Its significant structural feature is periclase directly contact with dicalcium silicate and tricalcium silicate,making eutectic solution-4 Cao Al2O3 Fe2O3 fill into crystal gap between dicalcium silicate and tricalcium silicate. Its porosity is low, the refractoriness under load is higher than 1700 ℃. It has good alkaline slag resistance ability, but with poor thermal shock resistance.There have many kinds of refractory products in our factory. Such as furnace drying tamp mass, fire brick, refractory nozzle, raw material. When you need any refractory products, welcome to view our website anytime. Made by calcium magnesia sand as refractory raw material, it will be made by firing at 1550~1600 ℃ after crushing, burdening, mixing and molding. It will be used at eye place of side-blown converter, top place of open-hearth furnace and oxygen-blown converter etc. Magnesia-calcium brick has seven properties: High temperature resistance, slag resistance, spalling resistance, wear resistance, purifying molten steel and hydration resistance performance. With the increasing production of stainless steel and all kinds of clean steel products, the demand of various magnesia calcium brick are increasing accordingly. For better production and using correctly, detailed understanding and learning of working performance and influencing factors of magnesia calcium bricks are very necessary.There have many kinds of refractory products in our factory, such as fire brick for sale, refractory nozzle, raw materials. Welcome to view our website anytime. Article source: http://www.chinafirebrick.com/Company_News_109.html
Precautions of using castable: 1) Proportion: When mixing the castable, the water amount should be strictly controlled according to the manual, and shall not exceed the limit. Under the precondition of ensure the construction performance, the amount of water added should be less. There have many kinds of refractory products in our factory. Such as fire brick for sale, refractory products, ceramic fiber felt and other refractory products. Welcome to view our factory anytime. 2) Mixing: The mixing time of the castable should not be less than 5 minutes (according to the requirements of the manual), and need to use forced mixer. Dry mixing first, then add 80% of the amount of water mixing, and then depending on the degree of wet and dry, slowly add the remaining water to continue mixing until the appropriate degree of work. 3) the use: The castable must be used in the whole bag, and mixed castable generally have to be used within 30 minutes. If in high-temperature dry operating environment, we need to shorten this time. Initial setting, or caking of refractory castable shall not be poured into the mold, or use by adding extra water. 4) Vibration: The castable poured into the mold should be vibrated immediately, the height of each layer should be no more than 300mm, vibration space is about 250mm. Vibration should avoid touching the anchor, not damage the insulation layer, not at the same location for a long time. When see the castable material surface back to slurry, pull the vibration rod out of the castable slowly to avoid segregation and empty.There have many kinds of refractory products in our factory, such as fire brick , refractory raw material and other refractory nozzle. Article source: http://www.chinafirebrick.com/Company_News_107.html
Refractory castable are divided into shaped refractory refractories and unshaped refractories. Unshaped refractory usually refers to the castable, which is composed of a variety of aggregate or aggregate and one or more kinds of adhesive and agent. Unshaped castable must be mixed with one or more kinds of liquids, it has strong liquidity and plasticity. Refractory castable is a refractory material made of granular and powdered, and adding a certain amount of binder and water together. Pouring method is suitable for refractory castable because of its strong liquidity, and no need to heat hardening. Refractory castable is composed of refractory aggregate, powder, binder, additive, water or other liquid materials. Refractory castable is generally use of pouring method, vibrating method or discovering method, and can also be made into a preform. Refractory castable is classified according to the porosity, bond and aggregate. Actually refractory castable is often classified by using temperature or functional features. According to the porosity refractory castable was divided into dense refractory castables and porosity of not less than 45% of heat insulation refractory material. According to binding agent refractory castable was divided into hydrsulic bond, chemical combination and coagulating binding. Refractory castable is mainly used for various heating furnace liner and other overall structure. There have many kinds of refractory products in our factory. Such as refractroy nozzle ,refractoy raw materials, ceramic fiber felt. Some of refractory castable also can used for smelting furnace. For example, aluminate cement refractory castable widely used in all kinds of heating furnace, non-slag and no acid-base erosion of thermal equipment. In the molten steel, iron, slag erosion and high working temperature positions, such as steel tank, molten steel ladle, blast furnace stack, iron runner, etc. It can be used by the low calcium and high pure alumina cement containing with granular and powdered materials of refractory castables. What's more, phosphate bondedcastable refractories are not only widely used for heating furnace and soaking pit furnace but also can used for coke oven and cement kiln. Phosphate bondedcastable refractory also has excellent effect in direct contact with molten slag and molten metal furnace and some parts of the other container. Article source: http://www.chinafirebrick.com/Company_News_106.html
Refractory bricks are refractory materials with certain shapes and sizes. In the premise of guaranteeing the service life, in addition to the design of reasonable size firebrick, but also have the correct shape and accurate size. This is to ensure product compliance, reduce scrap rate, improve the efficiency of the key manufacturers. The correctness of the shape shall include the verticality of the intersecting sides and the distortion of the brick surface for the straight fire bricks, and for the wedge-shaped refractory bricks, the distortion of the brick surface, the symmetry and the difference in the size of the head. The dimensional accuracy, ie the dimensional tolerances. Size of brick tolerances and distortion based on two main: First, meet the requirements of the thickness of brickwork brickwork; Second, the possibility of refractory production. Refractory fire brick seam thickness, is the specification of industrial furnace refractory brick thickness. The meaning of the possibility of the production of refractory bricks includes not only the possibility of producing such bricks, but also to ensure a very high yield. In general, the size of permissible deviation and distortion of refractory bricks should meet the requirements of the thickness of brickwork joints. When the size of brick tolerance and distortion can not directly meet the brickwork brick thickness requirements, can be selected by brick or brick to reduce bias and distortion.There have many kinds of refractory products in our factory. Such as fire brick for sale, Ceramic fiber felt, refractory nozzle, refractory raw material, etc. Welcome to view our website to know more. Article source: http://www.chinafirebrick.com/Company_News_105.html
In traditional VOD ladles, Mg-Cr and Mg-Ca bricks were widely used. While there are some problems with these two types materials. Mg-Cr brick is harmful for environment and labor health. Mg-Ca brick is easy to get hydrated. If stocked in wet condition, Mg-Ca bricks may lost stability, or even can not be used for construction. On basis of this condition, low carbon Mg-C brick can be a very good replacement. Low carbon Mg-C brick is developed on basis of common Mg-C bricks. Through decreasing carbon content, the thermal shock resistance would increase. This product is made from high quality fused magnesite, combined binder, special carbon and antioxidant compound. In this way, low carbon Mg-C bricks would be characterized with high crushing strength, good hot modulus of rapture and high inoxidizability, and it can also have a good adaptation for low alkaline slag.When you need any refractory products, such as fire brick for sale, refractory nozzle, refractory raw materials. Welcome to view our factory anytime. Article source: http://www.chinafirebrick.com/Company_News_103.html

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