High-carbon ferrochrome smelting blast furnace method, electric furnace, plasma furnace method. Blast obtained using only about 30% chromium cast iron was special. Currently, high-carbon ferrochrome chromium high flux method most used in the submerged arc furnace smelting.
The basic principle of high carbon ferrochrome smelting furnace method is to use a carbon reduction of chromium ore of chromium and iron oxides Stainless steel springs. Carbon reduction of chromium oxide generated Cr2C2 start temperature of 1373K, the reaction initiation temperature generated Cr7C3 1403K, and the reducing reaction generating chromium start temperature of 1523K, and thus when the carbon reduction of chromium ore is obtained chromium carbide,stainless steel wire rod chromium metal instead of . Ferrochrome carbon content level depends on the reaction temperature. Generate high carbon content of carbide is easier than generating low carbon content of carbide.
Chromium
is a shiny gray metal, the density of 7.2, a melting point of 1857 ℃,
boiling point 2672 ℃, malleable,Electro Polishing Quality Wire but becomes rigid when the
oxygen-containing, hydrogen, carbon and nitrogen and other impurities
and brittle. Inert
chemical nature of chromium, oxygen and water vapor at room temperature
is stable, chromium and oxygen react begins at above 600 ℃, but after
the surface oxide film, the reaction will be slow, when heated to 1200
℃, the oxide film is destroyed, the reaction becomes faster again.Stainless Steel Shaped Wire At high temperature, chromium and nitrogen, carbon, sulfur reacts. Chromium and fluoride can effect at room temperature. Chromium
can be dissolved in hydrochloric acid, sulfuric acid and perchloric
acid, nitric acid passivation after the case, no reaction with the acid.
Chromium with magnesium, titanium, tungsten, zirconium, vanadium, nickel, tantalum, yttrium alloy formation. Chromium and its alloys have strong corrosion resistance.
Alias: big eyes, also known as chromium-carbon ferrochrome
Natural attributes: natural blocks, each weighing no more than 15
kg, size is less than 20 * 20mm weight ferrochrome blocks shall not
exceed 5% of the total weight of ferrochrome.
Grade: high chromium to 50% chromium content as baseline assessment unit
Status: natural blocks, each weighing no more than 15 kg, size is
less than 20 * 20mm weight ferrochrome blocks shall not exceed 5% of the
total weight of ferrochrome.
GB Standard: GB / T5683-1987
Packing: According to the requirements, can be used in bulk, bags and drums.
Origin: Jilin, Yingkou, Inner Mongolia, Shanxi, Sichuan
Note: the material, size (ferrochrome chromium content of 50% as a baseline assessment of the unit).
Application:
Ferrochrome is the most important raw material for the production of
stainless steel, mainly used in the production of 304 Stainless Steel Binding Wire, ball
bearing steel, tool steel, nitriding steel, heat resistant steel,
quenched and tempered steel, hardened steel and hydrogen-resistant
steel, which is due chromium
in stainless steel play a decisive role in determining the elements ofStainless Steel Fishing Wire of only one genus, which is chrome, stainless steel are
sure each contain a certain amount of chromium. The corrosion resistance of Annealing Steel Wire mainly from chromium. Experimental
results show that only a chromium content of more than 12% when the
corrosion resistance of steel will be greatly improved, so that the
amount of chromium-containing stainless steel is generally not less than
12%. So supply and demand and the supply and demand situation chromite is closely related to the stainless steel market.High-carbon ferrochrome material: high carbon ferrochrome raw chrome ore, coke and silica. Chrome ore Cr2O3≥40%, Cr2O3 / ΣFeO≥2.5, S <0.05%, P <0.07%, MgO
and Al2O3 content is not too high, size 10 ~ 70mm, the case of
refractory ore, smaller size should be appropriate.Coke request containing fixed carbon is not less than 84%, ash content of less than 15%, S <0.6%, particle size of 3 ~ 20mm.Containing silica requires SiO2≥97%, Al2O3≤1.0%, thermal stability and good performance, without soil, size 20 ~ 80mm.
Stainless steel elements of the decision is only one genus, which is chrome, stainless steel each contain a certain amount of chromium. To date, no chromium-free stainless steel. Chromium stainless steel performance have become key elements determine the fundamental reason is that after adding chrome Stainless Steel Cold Heading Wire as an alloying element, prompting its internal contradictions in favor of the motion to resist corrosion damage aspects of development. This change can be explained in the following areas:
① chromium electrode potential iron-based solid solution to improve Binding Binding Wire .
② electronic chromium iron absorption iron passivation
Passivation is blocked due to the anode reaction caused by the corrosion resistance of metals and alloys can be improved on. Theory of metals and alloys constitute passive lot, mainly film theory, adsorption deals on electronic arrangement.
The main raw materials, scrap steel EAF have to return to the steel,
ferroalloy, slagging materials, oxidizers, and carburizing agent.
1) scrap iron and steel: iron and steel scrap is the main metal electric steelmaking materials. Scrap iron and steel used in the electric furnace has the following requirements:1. Calls less rust, rust and moisture containing oxide, the heat decomposition process, increasing the oxygen content in steel. Another component of the liquid steel is not easy to control;2. scrap steel and oil should have sediment, sediment increases
finished steel components of silica and aluminum oxide, oil, increase
the hydrogen content in the steel;3. The clip should have a non-ferrous metal scrap steel. Non-ferrous metals will affect the mechanical properties of steel and reduce the life of the furnace.The high levels of non-metallic impurities should not, otherwise it
will prolong the melting time and reduce the quality of finished steel.5. scrap iron levels can be suitable, excessive scrap refractory
comparison, too small scrap charge is easily oxidized and extended time.
2) Return of steel:
Weaving Wire Returns steel refers to steel-making plant because of component
failure or other reasons, but I scrapped ingots and casting, underwrite,
and rolling workshop cutting head, tail and rolling cut waste and so
on.
3) Ferroalloys:
Ferroalloy furnace used in relatively high demand:1. The high content of alloying elements, reduce heat consumption during melting. This high-alloy steel smelting time is very important.2. Fragmentation ferroalloy suitability, fragmentation of the General
Assembly to extend the melting time too, the block is too small it is
easy to float on top, increasing the burning loss, reduced recovery of
alloying elements.Annealing Steel Wire
3. The alloy should not contain slag and other non-metallic inclusions, the content of sulfur, phosphorus, and gas is lower.
4) slag material and oxidant:
Alkaline furnace slag material used mainly lime, fluorite and clay blocks, etc.; oxidant iron ore, iron oxide and oxygen. For the slag material, requires the use of low-temperature dry before removing moisture.
5) recarburizer:
Materials used in the smelting of liquid steel by carbon called carbon agent. Common electrode blocks coke and pig iron toner.
1, plain stainless steel mesh:
Plain Stainless Steel Wire Mesh
Plain Stainless Steel Wire Mesh
The most common form of the preparation method has been widely used in industrial production and civilian life, the main characteristics of the warp and weft density of the same wire diameter.
2, stainless steel square wire mesh
Material: galvanized iron wire, stainless steel, copper, aluminum and so on. Features: structural precision, mesh uniform, good corrosion resistance, strong and durable. Widely used in industry and construction, filter sand, filter liquid and gas. Also used in safety guards on machinery enclosures, etc., but it can also be used in place of wood walls and ceilings production.
3, Stainless steel wire I-Net / dense grain network
Material: Stainless steel wire, low carbon steel wire, nickel wire, copper wire, polyester wire, etc. .. Weaving: plain weave, twill weave, bamboo flower weaving, contrast weave. Features: filtering accuracy, high contrast network load strength. Uses: used in aerospace, petroleum, chemical, scientific research and transportation industries, but also the production of meal net, coal washing net.
Stainless Steel Wire, also known as stainless steel wire, stainless steel as raw material made of various types of different sizes and types of silk products, the origin of the United States, the Netherlands, Japan, the cross-section is generally round or flat. Common good corrosion resistance, high cost is 304 and 316 stainless steel wire stainless steel wire. Annealing Steel Wire drawing (stainless steel wire drawing) under the action of the pulling force of the rod or wire drawing die blanks from the die orifice is pulled to the production of steel or non-ferrous metal wire small section of metal plastic processing. A variety of different cross-sectional shape and size of wire and metal alloys may be employed drawing production. Pull the wire, the precise size, smooth surface, and drawing equipment and tooling used in simple, easy to manufacture.
Choose stainless steel welding wire mainly from the following five aspects to consider.
Stainless steel hex bolts
1, the material for stainless steel screws in mechanical properties, specifically strength requirements;
2, Stainless steel weaving wire a job conditions on the material aspects of corrosion resistance requirements;
3, the operating temperature of the material of the heat resistance (high-temperature strength, oxidation resistance) requirements;
4, the production process for material processing performance requirements;
5, other aspects, such as weight, price, purchase, and many other factors must be considered.
1, plain stainless steel mesh:
Plain Stainless Steel Wire Mesh
Plain Stainless Steel Wire Mesh
The most common form of the preparation method has been widely used in industrial production and civilian life, the main characteristics of the warp and weft density of the same wire diameter.
2, stainless steel square wire mesh
Material: galvanized iron wire,Stainless Steel Spring Wire , copper,Braiding Wire aluminum and so on. Features: structural precision, mesh uniform, good corrosion resistance, strong and durable. Widely used in industry and construction, filter sand, filter liquid and gas. Also used in safety guards on machinery enclosures, etc., but it can also be used in place of wood walls and ceilings production.
3, stainless steel I-Net / dense grain network
Stainless steel mesh I-Net pictures
Stainless steel mesh I-Net pictures
Material: Stainless steel wire, low carbon steel wire, nickel wire, copper wire, polyester wire, etc. .. Weaving: plain weave, twill weave, bamboo flower weaving, contrast weave. Features: filtering accuracy, high contrast network load strength. Uses: used in aerospace, petroleum, chemical, scientific research and transportation industries, but also the production of meal net, coal washing net.
