Skills preferred in pig iron refractory using

Xinmi Changxing refractory main products of bottom blowing argon with a series of quick drying pouring material is listed as national torch plan project focus of permeable brick, gun furnace, the skill level of international priority; between the working lining refractory material for ladle, with a series of skateboard outlet, between three large bulky package casting goods has reached international advance level.

Productivity growth is the issue grows the important power. Raised for the project of 100000 tons unshaped refractory, 200000 ventilation bricks, 25000 tons of brick, 10000 tons of silicon nitride silicon carbide brick, concluded 20000 tons slides, 5000 tons casting three pieces are to be 20 at the end of the year completed and put into production, 50000 tons of alumina magnesia carbon brick foresight will be put into operation in 2010 May, after the achievement growth is productivity have put on the important power.

The exchange rate will continue to maintain the hair foreseen before and after 35%. Commodity cost structure, raw materials accounted for 82%, accounting for 4% of human resources, and depreciation accounted for 14%, by raw materials price greater impact. The enterprise commodity wool exchange rate has remained around 40% high, causes include:

First, price inertia causes the price to maintain high, before 2000, the steel mill in refractory simply from foreign entrance, after gradually realize the entrance is replaced, the unit price is still maintained at a high level;

Second, because the inserted steel enterprises need annual certification, after insertion has some monopoly power, high insertion wind barriers, greater responsibilities (such as causing the steel leakage accident must bear the compensation duty) make wool exchange rate to maintain a high level;

Three, refractory material as supplies accounted for only 1% before and after the cost of steel making, steel prices is not sensitive to the price; fourth, enterprises pay attention to innovative products R & D, the majority, but also conform to the user’s skill requirements, unceasingly withdrawal new goods and to mobilize additional value of commodity, have strong pricing ability, thus maintaining a higher gross rate the level of.

Application of epoxy mortar in blast furnace.

Blast furnace used in treatment of iron mud gun port, through the usual is a water gun mud, but in the steel yield is high, the epoxy mortar are more susceptible to iron slag machineerosion and chemical corrosion, resulting in a blast furnace slag not net, not only affect the blast furnace high yield smooth, also easy to send the world iron process of iron mouth off, resulting in iron mouth running large flow caused by accident. At the same time, because of the iron export surge, prone to iron mouth call “bazooka” accidents such as scald people.

Ingredients important producing anhydrous stemming ratio (%): brown alumina 15-24, SiC 6-15, black 20, white mud 12-16, tar, 18-20. The gun mud pressure intensity 20Mpa, easy to speak in the blast furnace mouth machine openings and anti erosion function better.

An important component of white mud amount is too large, will reduce the excessive mud gun, which occurred after hours, crack, impact stemming humanity, in stemming the adding amount of 12% basically, gradually increase the volume, current after firing line changes to +0.3%, the best performance, the plasticity is high, a steel at high temperature have a good micro expansion, no crack, no effective away by expansion, with iron, iron flow channeling cracks do not bring into shares and splashing, crisis of cooling wall serious burn.

An important component of low, medium temperature sintering agent amount, will have the influence to the stability of iron, sintering agent was added to make the gun mud formation of low melting material under high temperature, thereby stemming corrosion resistance variation, when tapping a splash phenomenon. Find the ratio of 2.5%, treatment of iron mouth, than water stemming save 25mins, and does not affect the iron groove processing, iron, iron flow stability.

The above anhydrous stemming in domestic steel reference 1, No. 2 blast furnace, a water gun mud compared with the same period, the following skills: blast furnace iron mouth indicators pass rate rose 2%, iron punctuality rate rose 6.6%, iron content difference pass rate rose 8%, iron mouth iron wind reduction rate decreased 96%, every day can increase your iron blast furnace operation, safety parameters have also been mobilized. The development and application of anhydrous stemming is very very successful, dedication to strengthen the property of high yield and make the blast furnace.