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Limestone is a common type of carbonate sedimentary rock. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate. Limestone forms when these minerals precipitate out of water containing dissolved calcium

Limestone is a sedimentary rock composed primarily of calcium carbonate (CaCO3) in the form of the mineral calcite. It often contains other minerals, such as clay, dolomite, and silic Appearance: Limestone can vary in color from white and gray to tan, brown, and even black. Its appearance can be influenced by impurities, organic materials, and the type of minerals present. Uses: Construction: Limestone is widely used as a building material for flooring, walls, and facades due to its durability and aesthetic appeal. Industry: It is used in various industries, such as cement production, where it serves as a key ingredient in the manufacturing of Portland cement. Agriculture: Limestone is used to improve soil quality by neutralizing acidity, providing essential nutrients like calcium, and promoting plant growth. Chemical Industry: It is used in the production of lime, which has applications in various chemical processes.

Wooden Doors And Door Frames Full KD Prosess WE KNOW WOOD BETTER To get quality pieces of wood is not enough to have high-tech machinery alone. We think about it from the selection of raw materials, pieces of wood by experienced experts in their fields to the process of wood covenants. After we process the raw materials into finished products such as flooring, decking, lumbersharing, stairs, doors, tables, chairs, pergola, gazebos, and various other custom products in accordance with the provisions of the High Standard Quality Control that we have in inspecting each of our production results. The front door is often the focal point of a home exterior a door is the first thing guests see when they arrive, it's the last thing they contemplate after leaving. Pt nifinternasional produces a complete line of wooden door to fit your architectural design, either classic door or modern contemporary door. We also manufacture wood door based on your custom made design.

Magnesia Bricks Description Magnesia Bricks are alkaline refractory materials. These products have over 90% magnesium oxide content and adopt periclase as the principal crystalline phase. Magnesia Bricks can be divided into two categories of Burnt Magnesia Bricks and Chemical Bonded Magnesite Brick. They have excellent performance of superior high temperature mechanical strength and volume stability. Magnesia Bricks can service in the high temperature of 1750.. They are ideal products for glass furnace application. Magnesia Bricks Features: It is a kind of alkaline refractory product with periclase as main phase magnesite-alumina spinel clinker as basic material. the product has such characteristics as good temperature vibration, good strength and volume stability in high temperature. Magnesia Bricks Application Basic open-hearth furnace for steelmaking Electric furnace bottom and wall Permanent lining of oxygen converter Non-ferrous metal metallurgy furnace Hyperthermia tunnel kiln Lining of rotary cement kiln Heating furnace bottom and wall Regenerative chamber of glass furnace Magnesia Bricks Properties High Refractoriness Good alkaline slag erosion resistance High apparent initial softening temperature Good thermal conductivity High thermal expansion Magnesia Bricks Manufacturing Process Burnt Magnesia Bricks are manufactured with magnesite clinker as the raw material and fired in the high temperature of 1550~1600 after smashing, burdening, mulling and molding. High-purity products can be fired in the temperature that over 1750. Chemical bonded magnesite brick is produced with certain chemical bonding through mixing, molding and drying.

Insulation Bricks

Refractory Fire Brick

Ramming mass is commonly used in metallurgy, building materials, non-ferrous metal smelting, chemical, machinery and other manufacturing industries. Ramming mass is widely used in non-core intermediate frequency furnace and core induction furnace. As an intermediate frequency furnace ramming material, refractory ramming is applied to melt gray cast iron, nodular cast iron, malleable cast iron, vermicular cast iron, and cast alloy steel; to melt carbon steel, alloy steel, high manganese steel, tool steel, heat resistant steel, stainless steel, molten aluminum and its alloys; to melt red copper, brass, white brass, bronze and its alloys, etc. Induction furnaces are used for melting cast iron, mild steel and various alloy steels in foundries and making of steel in mini steel plants using sponge iron The refined high silicon, low iron quartz sand and quartz powder are selected and the fused quartz sand is added as the refractory material., with no slag, no crack, damp proof, convenience of repair, and the corrosion resistance, thus greatly improving the furnace service life span and the economic benefit.. Silica ramming mass can safely be used up to an operating temperature of 1600 deg C. Since it expands very little, it is superior to both alumina and magnesia refractories to resist thermal shocks Acid ramming material is the premixed ramming mass of the lining material. The acid ramming mass is used to smelt a series of metal materials such as ordinary steel and carbon steel. The lining practice best suited to a particular furnace depends upon the capacity and design of the furnace, operation practice adopted during making of a heat, and furnace output.