Precautions when using graphite electrodes in EAF

(1) Select the appropriate graphite electrode grade and diameter according to the capacity of EAF and transformer. 

(2) Avoid damaging and moistening during the process of loading, unloading and storage. Wetted electrodes should be dried. When lifting, needs to protect the electrode connector hole and the connector thread. 

(3) When connecting the electrode, use compressed air to blow off the dust in the connector hole. When the holder is holding the electrode, be sure to avoid the connector area. 

(4) The melting period is the most prone to break the electrode, so the operator should be carefully observed, timely lift the electrode. 

(5) In the refining period, if carbon is added by the graphite electrode, the electrode immersed in the molten steel becomes thinner quickly and breaks easily or causes the joint to fall, resulting in increased electrode consumption. Therefore, by other means to increase carbon as far as possible.

Changxing Refractory offers best graphite electrodes with lowest price. HP graphite electrodes are used mainly in electric arc furnace steel production. If you need it, please contact me anytime. Welcome to view our website to know more details. There have many refractory news and refractory products information on web. You can read more refractory products and know more refractory materials information. Because our website has many kinds of refractory news and industry news. what's more ,you can know more kinds of refractory information from our website.

Article Source: HP Graphite Electrode
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
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Website:http://www.chinafirebrick.com/

Introduction of magnesia-calcium bricks

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. 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.

Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.

Article Source:Introduction of magnesia-calcium bricks
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
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Website:http://www.chinafirebrick.com/

Matters need attention in designing ladle cover

1. There are normally two kinds of ladle cover, water-cooling cover and refractory material cover. Compared with refractory material cover, water-cooling cover is with much less maintenance work. However, water-cooling cover is with more energy loss, especially for small ladle. It is reported that, for a 300t ladle, the energy loss with water-cooling cover is 12-14%, while as high as 41% for a 40t ladle. Thus energy loss and maintenance should both be put into consideration during designing.
2. To ensure good inner environment in ladle, reduce oxidization of electrodes and slag, reduce molten steel absorbing hydrogen and nitrogen from the air, it’s better to keep a mirco positive pressure status.
3. Deploy a hood on ladle cover and a tube by the side of the hood, or deploy several vacuuming holes under the ladle cover, then connect them to the tube, set a regulating valve plate to form the second vacuuming point in the ladle.
Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.
Article Source: LF refining furnace or ladle applied materials
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
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The reason and trend of graphite electrode price increase

At the beginning of 2017 , the average price of 500mm per ton of graphite electrode was only RMB 129,000 / ton , more than ten times higher . Analysts pointed out that the tide was far from over . The two characteristics of HP graphite electrode have been determined , and the price increase basically will be continued .

1. Supply end : long production cycle
The production cycle of graphite electrode needs to be three months and can not stop in the middle . The current heating season has a significant impact on graphite electrode enterprises . In December , many carbon factories in Hebei province have stopped production and limited production and lost a lot of capacity . At present , most of the graphite electrode manufacturers in Henan and Hebei are still in the shutdown state . According to the agency , capacity expansion is expected to be difficult before the end of the heating season on March 15 next year ; New capacity is expected to increase capacity of more than 100,000 tons of graphite electrode in June next year . Therefore , the short - term view of graphite electrodes will have a greater chance of maintaining the market in the first half .

2.Demand end: the development of electric furnace steel is the trend of the times.
Electric furnace steel is a big consumer of HP graphite electrode consumption, and the 70% demand of graphite electrode comes from electric furnace steel. And the fastest way to expand capacity is on the furnace steel making.
On the other hand, the state also expressed support for the development of electric furnace steel industry.

Luo Tiejun, inspector of the refractory raw material industry department of the Ministry of Industry and Information Technology, pointed out that the state is advocating enterprises in the "226" cities to transfer steel production capacity to the southwest, northwest and southeast coastal areas in the form of electric furnace steel.
A few days ago, the chairman admitted that the next two years China's new production capacity of electric furnace steel can reach 80 million tons.
3.In addition, restocking demand is also expected to push graphite electrodes to continue rising prices.
In terms of inventories, after a fall in October and November, stocks of graphite electrode in traders and steel mills were basically empty, and inventories in the industrial chain are now at very low levels.
According to graphite electrode enterprises, apart from the Fujian steel plants to maintain a two-month stock, domestic large and medium-sized steel plants this wave of procurement has basically completed pre-season stock.
In the near future, the possibility of price stability before the Spring Festival is greater. After the big probability of Spring Festival to early March, with the steel factory inventory replenishment and the northern region heating season before the end of the steel factory stock in advance. This will again lead to concentrated demand, when the market price of HP graphite electrodes is expected to rise again as the supply of spot inventory of graphite electrodes is insufficient.
Article Source: HP Graphite Electrode
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
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The different and structure of HP graphite electrode

HP Graphite electrodes are used mainly in electric arc furnace steel production. They are presently the only products available that have the high levels of electrical conductivity and the capability of sustaining the extremely high levels of heat generated in this demanding environment. Graphite electrodes are also used to refine steel in ladle furnaces and in other smelting processes.

GrafTech International introduced UCAR Grade AGX ultra-high power (UHP) graphite electrodes and Grade AGX supersize graphite electrodes, 700 to 750 mm in diameter. Now GrafTech International offers unique Grade ALX pinless graphite electrodes to address the issues of stub losses and poor bottom joint performance, Grade LFX premium quality electrodes designed and engineered specifically for the ladle furnaces and non-steel applications.

Graphite electrodes are also used to refine steel in ladle furnaces and in other smelting processes.

The HP graphite electrodes carry the electricity that heats electric arc furnaces, the vast majority steel furnaces. They are made from petroleum coke after it is mixed with petroleum pitch, extruded and shaped, then baked to sinter it, and then graphitized by heating it above the temperature (3000 °C) that converts carbon to graphite. They can vary in size up to 11 ft. long and 30 in. in diameter.

There have many refractory news and refractory products information on web. You can read more refractory products and know more refractory materials information. Because our website has many kinds of refractory products and industry news. what's more ,you can know more kinds of refractory information from our website.

Article Source: HP Graphite Electrode
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

Come to know the classification of HP graphite electrodes

According to the different of service power and electricity , using different refractory raw materials and production technology, graphite electrodes can be divided into ordinary power (RP) graphite electrodes, high power (HP) graphite electrodes, ultra-high power (UHP) graphite electrodes.

We are a well-recognised organization engaged in manufacturing, supplying and exporting a quality range of High Power Graphite Electrodes.

We are instrumental in manufacturing for our clients a commendable array of Graphite Electrodes that are demanded for their ease of use, long time service and options for wide ranging usages. Offered range also incorporates Ultra High Power Graphite Electrodes, High Power Graphite Electrodes and Regular Power Graphite Electrodes. These offered Electrodes are prepared by using LWG Furnaces, advanced machinery and latest techniques. Backed by its excellent attributes, this offered range is extensively applauded by our patrons. Addition to this, we ensure customized product for the gratification of esteemed clients.

We supply RP, HP, and UHP and impregnated(IP) graphite electrodes (Dia.50-600mm) with low electrical resistivity and ash worked in electric-arc furnace steelmaking, industrial silicon furnace and corundum furnace, and so on. There have many refractory news and refractory products information on web. You can read more refractory products and know more refractory materials information. Because our website has many kinds of refractory news and industry news. what's more, you can know more kinds of refractory information from our website.

Article Source: HP Graphite Electrode
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/