Precautions when baking furnace

1. The furnace charge must be required, uniform medium and small refractory materials are needed, and the oven fabric must support the steel pan liner.

2. Carefully and carefully guarding the oven in the process of gradual feeding, and finding that the charge and steel pan are in time for fire treatment, the steel pan should be made to not melt before the molten steel is in place.

3. The first furnace of the oven should try to make the location of the molten steel close to the furnace mouth platform in order to facilitate the optimization of the sintered layer and to form the sintered layer of the upper furnace wall as much as possible so as to prevent the sand from falling when the upper mouth is not sintered to remove the residual steel pot. After the furnace is fused, the holding temperature must meet the requirements in order to increase the thickness of the sintered layer.

4. Barbaric operation is strictly prohibited.

5. Try to use less slag, more clean scrap, and use a slag treatment when the amount of slag is large.

6. Minimize soaking time when using high-Mn steel grades. Pay attention to the power supply curve of the cold furnace so as to close the cracks. Repair must be fine, as far as possible between the two refractory materials.

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:Precautions when baking furnace
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
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The application of UHP Graphite Electrode

Introduction:

UHP graphite electrodes refer to graphite electrodes that allow the use of current densities greater than 25 A / cm2.

Graphite electrode has good electrical properties and chemical stability. What’s more, Graphite electrode has advantages of high mechanical strength, low impurity content and good vibration resistance. Graphite electrodes are good conductors of heat and electricity. Graphite electrode is widely used in steelmaking electric furnace, refining furnaces, production of ferroalloy, industrial silicon, yellow phosphorus, corundum , submerged arc furnaces and other smelting furnaces that produce high temperatures by electric arc.

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, UHP graphite electrodes.

Application:

Ultra-high power (UHP) graphite electrode is mainly used in ultra-high power electric furnace and ladle furnace.
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: HP Graphite Electrode
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
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On May 1, the VAT rate in the manufacturing industry will be lowered

From May 1st, 2018, the value-added tax rate for manufacturing and some other industries will fall from 17% to 16%.

The tax cuts have really benefited the refractory companies.

Upstream, downstream, and surrounding companies in the refractory industry will all be the beneficiaries of this tax cut. This VAT policy adjustment is generally expected by the market and companies. The tax cut exceeds the market expectation, which will bring huge benefits to refractory raw materials companies. This shows that China's value-added tax has been steadily advancing along the established modern value-added tax reform goals. Raise the annual sales standard of small-scale taxpayers, so that more small and medium sized refractory companies and start-ups can enjoy tax benefits.

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:http://www.chinafirebrick.com/Company_News_163.html
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
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Maintenance of ramming mass for EAF bottom

1.The slag resistance of EAF bottom ramming mass is not very good, ensure slag line above the slope when charging scrap.

2.If there is pit on the bottom, lean the furnace backwards, use compressed air to blow the remaining steel and slag onto the slope, after furnace cooled down, fill the pot with ramming mass and make it flat, then make it compact with pneumatic rammer. If there is pit on the slope, repair it with the same method.

3.If cold maintenance is not possible, mix ramming mass with water and then do a hot repair, press until it’s compact.

4.Daily maintain the water cooling components, if there is a water leakage, handle it in time to avoid the furnace to be affected with damp, which could cause serious accidents.

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:Maintenance of ramming mass for EAF bottom
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

Come to know the application of casting powder in Chinafirebrick

Mold powder is an important auxiliary material in continuous casting production. With the development of China's steelmaking and continuous casting technology, the technology of protective flux has also been continuously improved. However, in the current backdrop of fierce competition in the steel market, continuous casting is undergoing a comprehensive technical upgrade with characteristics such as specialization, constant pull, high quality, and multiple varieties. Whether China's Mold powder technology can meet the need for continuous improvement of continuous casting technology is a matter of common concern to researchers and manufacturers of continuous casting production plants and protective casting powder. What are the advantages of continuous casting and mold protection technology in China? Where are the links that restrict the steady improvement of product quality and technological development? Faced with complex varieties and continuous casting processes, and how many mold powder supplier continue to choose mold powders?

For continuous casting production to achieve high quality and high efficiency, and even to achieve heat-free hot charging defect-free billet, the correct choice and use of mold flux is very necessary. However, the most basic problem is to first understand the role of the protective slag, and how to ensure the normal function of the protective slag under the conditions of complicated and continuous casting process.
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:casting powder
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What is HP graphite electrodes ?

We can produce RP graphite electrodes, HP Graphite electrodes, SHP graphite electrodes, UHP graphite electrodes. The diameter from 75mm to 800mm. We also produce the Graphite electrodes, graphite blocks, graphite crucibles and so on. The annual output of producer is over 80000MT. We have passed the ISO9001:2008 quality certification.

Graphite electrodes are manufactured with high quality raw material including petroleum cokes, needle cokes and coal-tar-pitch through the production process of calcining, crushing, burden, mixing kneading, extruding, baking, impregnation, graphitization, manufacturing, packing.

Our products are characterized by superior compact structure, good electrical and thermal conductivity, high mechanical strength and high resistance to oxidation and corrosion in high temperature.
The Graphite electrodes are widely use in electric are furnaces and ladle refining furnaces for steel making and used in electric smelhing furnaces for producing industrial silicon, yellow phosphorus, corundum, nonmetals and so on. it is one essential part of the raw material industry.
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
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Introduction of chrome corundum brick

In the reheating furnace, using push-pull skid bricks and platform blocks to replace the water-cooled pipe system can generally save about 20% energy, it can also eliminate the “black mark” of the billet and improve heating quality. Normally, the maximum temperature in reheating furnace is about 1200℃ to 1300℃,during use, metal rails are gradually oxidized, abraded, cracked and damaged; and due to the effect of high temperature, deformation will occur, which will affect the straightness of the entire track, and it will need to be replaced, then product costs will increase accordingly, affected the smooth progress of production and reduced the efficiency of the furnace and wasted energy. Therefore, a high-performance refractory is developed based on this to replace heat-resisting rails.

To be applied on reheating furnace, skid bricks are required to withstand the slag erosion such as scales of iron oxide and the constant wear and impact of the movable billet at high temperatures. So these refractory fire bricks must be with good erosion resistant wear and impact resistance and thermal shock resistance. In the meantime, it should keep high strength during using.

Most of the skid bricks are made of fired or fused mullite and corundum refractory products, having poor wear resistance due to the oxidation of the pores when being fired. While, the fused cast products are compact and with good wear-resistant, however, it has the problem of internal shrinkage and poor uniformity. With the wear of the surface dense layer, the performance and service life will drop sharply.
By using α-Al2O3 as refractory raw material, adding appropriate amount of chromium oxide powder and chrome corundum clinker fine powder, the chrome corundum bricks are shaped at 1700℃, having a lower chromium oxide content than cast fused corundum bricks.

The high-performance chrome corundum brick technology uses α-Al2O3 and chromium oxide powder to fill the sintered pores, which greatly improves the compactness of the material. The composite binder is combined with highly active AL2O3 and Cr2O3 to form mullite and aluminum, to make it has high strength, good thermal shock resistance and low porosity. So the chrome corundum brick has better wear resistance and impact resistance compared with fused alumina quality. According to ASTM-704 standard, the wear index of the chrome corundum slide brick is 1.5 cm3, while the fused alumina is 2.0 cm3.

Conclusion: The practical application in recent years shows that the high wear-resistant chrome corundum brick has the following characteristics:

(1) High density, uniform surface and uniform inner layer organization, low porosity, high strength, high temperature wear resistance.

(2) Good resistance to sudden cooling and heating. In the areas near the exit gate and the door opening at the end side, there has frequent changes of temperature at the furnace door, cracks seldom happen in the tap channel refractory brick.
(3) Good slag resistance. The iron oxide scale does not bond with the tapping brick, and part of the slag is carried out with the billet out of the furnace, this can reduce the number of times to remove slag in the production process and reduce the labor intensity when cleaning the slag.

(4)The price of such chrome corundum bricks is not only lower than high-alloy heat-resistant and wear-resistant rail steels, but also lower than fused zirconium corundum bricks, which is undoubtedly a favorable factor for reducing production costs.

Article Source：Introduction of chrome corundum brick
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
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