Analysis of the causes of damage to alumina-magnesia carbon bricks and MgO-carbon brick during use of carbon-containing refractory materials

Although carbon-containing refractory materials have significant resistance to molten steel erosion, slag resistance, good thermal shock resistance and high temperature flexural strength, the oxidation problem of carbon limits its service life, and the magnesia carbon bricks are damaged during use. Mainly due to the oxidation of carbon by iron oxides in the slag and the …

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Detailed explanation of 7 types of refractory materials for trough tapping structures

When the electric furnace taps steel, the furnace body tilts to a certain angle (usually 45°) in the tapping direction. The molten steel flows through the tapping trough and enters the ladle. In addition to guiding the molten steel, the tapping trough also prevents the molten steel from scattering. , protect molten steel and reduce …

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How to choose furnace lining and furnace materials for medium frequency furnace production of cast steel

In recent years, some steel casting companies in our country have adopted spinel-type furnace lining materials. Among them, some manufacturers purchase materials pre-prepared by foreign manufacturers. Although the use effect is very good, the production cost has increased a lot, and its characteristics are not good. Very understanding. This article mainly wants to introduce some …

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Preventive measures for steel leakage accidents between ladle slide gate

The reasons for steel leakage between ladle slide plates are manifold, and poor control of sliding spout machinery, slide plate installation operation, slide plate quality, ladle steel pouring operation, steel smelting and other aspects may lead to steel leakage between slide plates. For different reasons to develop appropriate preventive measures, can reduce the chances of …

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Four recycling technologies to give new life to used magnesium carbon bricks

Waste refractory materials can be used as secondary raw materials after simple picking, crushing and other initial processing. Generally to a small amount added to the production process of higher quality products, or add a higher proportion to the metallurgical auxiliary materials and other low value-added products. The economic and social benefits generated by the …

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Selection of furnace lining materials and analysis of factors that effectively improve the service life of induction furnaces

Nowadays, there are more and more companies and businesses selling furnace lining materials, and the prices are also varies. How to identify the quality of furnace lining materials and how to select furnace lining materials have become problems faced by foundry companies. They are usually tested and used, but this virtually increases the cost and …

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What are the ways of damaging purging plug?

purging plug are high-end functional refractory materials that do not work continuously during the entire ladle turnover cycle, so different physical and chemical corrosion will occur at different times. Damage to purging plug can be divided into the following categories: 1.Oxygen purging effect From the completion of tapping the ladle to the next steel connection, …

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The discussion on ladle slide gate plate and lower nozzle

During our visits to many steel companies around the world, we found that some of them focus too much on the service life of ladle slide gate plate and lower nozzle, some even ask for more than 10 heats, here are some of our opinions on this condition: 1.Longer service life slide gate plate and …

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How to solve the sliding gate plate leakage of steel

The ladle slide gate plate system consists of ladle well brick, upper nozzle, upper slide gate plate, lower slide gate plate, lower nozzle, and sliding gate mechanism, the structure of which is shown in Figure. 1.The working principle of the sliding gate plate is to make the upper and lower slide gate plate casting holes …

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Analysis of purging plug bleed-out

Ladle purging plug play an important role in the process of molten steel refining. As a refractory product, there will be consumption and damage during use. If the use method is not properly grasped, it will affect normal production and even cause serious production accidents such as steel breakout. The purging plug is located at …

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The process of magnesium carbon brick production

It can be seen from the process flow chart that the production process of magnesium carbon bricks is not complicated, but to produce high-quality products, each process must be strictly monitored, including mixing, moulding, heat treatment (drying) of these links is particularly important in the production of the place. 1.Breaking and crushing Broken crushing is …

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Application of magnesium carbon bricks in the iron and steel metallurgy industry

Magnesium carbon brick is a new type of refractory material emerged in the 1970s, it is high temperature sintered magnesium sand or electrofused magnesium sand and carbonaceous materials as raw materials, with a variety of carbonaceous bonding agent made of non-burning refractories, magnesium carbon brick that maintains the advantages of carbonaceous refractory materials, and at …

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The reasons of refractory brick collapse in using process

For refractory brick, we may not feel strange. With the progress of society, the application of refractory brick is more and more widely. Refractory brick appear collapse phenomenon in the actual using, so what causes it; Following refractory factory is simple to give you introduced the refractory bricks collapse reason: 1. Red hot refractory brick …

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Erosion of LRF magnesia carbon brick by slag

In the ladle, due to the complex physical and chemical environment at the slag line, the furnace lining is the most vulnerable to damage. The chemical attack of steel slag on magnesia-carbon bricks is mainly through the dissolution of magnesia and the oxidation of graphite in the fire brick body. Under the combined action of …

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Selection of refractory material for VOD ladle lining

Only refractory materials with the following two characteristics can be used as the lining of the VOD furnace: 1) It can resist the erosion of high-temperature slag; 2) It has excellent resistance to spalling in a sudden cold and hot environment. At present, the refractory materials used in VOD furnaces are generally magnesia dolomite bricks …

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Classification of tundish sizing nozzle

With the reform and improvement of continuous casting technology and functional refractories, the most commonly used in our country is the zirconium sizing nozzle. According to the content of zirconia in the sizing nozzle, the zirconium sizing nozzle can be divided into ordinary type sizing water and zirconia type sizing water are two categories, ordinary …

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Main measures to prolong the life of ferroalloy furnace lining

Ferroalloy electric furnace furnaces, especially cold stamped paste villages, when the knotting quality does not meet the required requirements, and the oven lining time and heating rate are not closely controlled during baking, the baking quality of the furnace village will not be achieved. To normal production requirements. According to the reasons for the damage …

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The three main causes of damage at the long nozzle

Long nozzle are subject to complex environmental conditions in the course of their use. Both to face the instantaneous heat brought about by thermal stress and mechanical stress caused by neck fracture or port longitudinal cracking, but also to face the slag on the impregnated parts of the erosion; Not only to face the neck …

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Analyze the causes of cracks and steel leakage in use of ladle well block and solution measures

Steel mill ladle is the role of the converter smelting steel transportation to the continuous casting, in the continuous casting ladle rotary table above, 1500 ℃ high temperature steel through the bottom of the ladle nozzle, slide out to the tundish, billet transit suspension, and ultimately from the tundish nozzle to the continuous casting of …

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How to choose ramming mass and adjust the composition

In the traditional production process of ductile cast iron, about 10% of carbon scrap is generally used for dosing. This paper only deals with the production of ductile iron in the induction furnace, improve the proportion of carbon scrap steel use, the production process should pay special attention to some of the problems. According to …

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