#bof refractories

[indofgl]

Basic Oxygen Furnace (BOF) steel making involves blowing oxygen through molten pig iron that is heated to more than 1,600℃ to convert it into steel. Different types of refractories play an important role to maximize furnace life and yield. IFGL Refractories offers specialized BOF refractory solutions for enhanced furnace performance.

[rajasthanlime]

Lime Dust Control Measures in Steel Mills: Best Practices

Steel mills play a crucial role in our industrial landscape, but they also generate significant environmental challenges. One such challenge is lime dust, which can impact air quality, worker health, and overall efficiency. In this article, we delve into the best practices for controlling lime dust in steel mills, emphasizing the importance of safety, productivity, and environmental stewardship partners with the best steel manufacturers in india.

Understanding Lime Dust

Lime, also known as calcium oxide (CaO), is a critical material in steelmaking. It serves several purposes, including:

Slag Formation: Lime helps create a good slag, facilitating the removal of impurities like sulfur and phosphorus during steel production.

Arc Furnace Performance: In electric arc furnaces (EAFs), lime provides a safer platform to withstand high-intensity arc plasma.

Basic Oxygen Furnace Reactions: In basic oxygen furnaces (BOFs), lime plays a role in violent reactions.

However, the handling and processing of lime can lead to the release of fine particles—lime dust—which poses health risks and environmental challenges.

Best Practices for Lime Dust Control

1. Proper Selection of Limestone

Quality Matters: Choose high-quality limestone for lime production. The limestone’s composition affects lime quality characteristics.

Calcination Process: The calcination process involves burning limestone at high temperatures to produce lime (CaO). Modern kilns (vertical and rotary) are used for this purpose.

2. Effective Calcination

Temperature Control: Calcination occurs at temperatures between 800°C and 1000°C. Properly controlled conditions ensure optimal lime quality.

Energy Efficiency: Modern kilns improve energy efficiency, reduce CO2 emissions, and minimize operational costs.

3. Lime Dust Mitigation

Dust Collection Systems: Install efficient dust collection systems to capture airborne lime particles.

Personal Protective Equipment (PPE): Workers should wear appropriate PPE, including masks, goggles, and coveralls.

Ventilation: Proper ventilation in work areas reduces dust concentration.

Wet Suppression: Spraying water on lime piles and conveyor belts minimizes dust dispersion.

Enclosed Conveyors: Use enclosed conveyors to prevent dust escape during transportation.

4. Environmental and Economic Impact

Slag Quality: Lime quality directly affects slag quality, which impacts metallurgical results and refractory life.

Productivity: Efficient lime dust control enhances overall productivity.

Cost Savings: Proper lime management reduces operational costs.

Environmental Benefits: Dust control contributes to cleaner air and a healthier work environment.

Spotlight on Rajasthan Steel Manufacturers

In Rajasthan, several best steel manufacturers in rajasthan contribute significantly to the industry. Let’s highlight some key players:

Rajasthan Steels: Based in Jodhpur, Rajasthan Steels supplies top-quality steel products and houses renowned steel brands1.

Jai Bharat Steel: With over 65 years of experience, Jai Bharat Steel is a leading supplier of quality steel in Rajasthan. Their commitment to excellence and innovation sets them apart2.

Other Notable Companies: Rajasthan hosts various iron and steel companies, including Shri Ram Industries and Santosh Steel3.

Conclusion

Lime dust control is essential for steel mills to ensure safety, productivity, and environmental responsibility. By implementing best practices, steel manufacturers can optimize their processes while safeguarding workers and the planet.

Remember, the best steel manufacturers in jodhpur, India, and Rajasthan prioritize efficient lime dust management alongside their steel production goals

[cxrefractories]

How to make magnesia brick

Magnesia Brick Manufacturing Process:

The manufacturing process of magnesia brick includes the following steps:

1. Break and smash:

Crushing is the process of processing large pieces of material into ideal particle size materials.

2. Ingredients (weighing):

The raw materials are prepared in a predetermined proportion and mixed in a strong sand mixer. The order of feeding is magnesia aggregate – carbon fiber – binder – carbon raw material.

3. Mixing:

Mix thoroughly to get perfect coating. Add mixture made in step (B) and remix the batch intensively. Now add powder Resin (item 9), then Hexamine (item 10) and mix once again.

4. Molding:

Use a molding machine to make the mixture into bricks.

5. Drying:

Use a drying oven to dry the bricks for several hours.

6. Firing:

Fire the bricks in a kiln at temperatures of 1550 to 1600 degrees Celsius.

7.Finishing:

The final step is to grind and polish the bricks to get the desired shape and size.

Types of magnesia brick:

Magnesia bricks can be divided into two categories: sintered magnesia bricks (also known as fired magnesia bricks) and chemically combined magnesia bricks (also known as unburned magnesia bricks). Magnesia bricks with high purity and firing temperature are called direct-bonded magnesia bricks due to the direct contact of periclase grains; Bricks made of fused magnesia as raw materials are called fused re-bonded magnesia bricks.

Uses of Magnesia Bricks:

Magnesia bricks are used in steelmaking furnaces, electric furnace bottom and wall, and high temperature tunnel kiln. Magnesia bricks are also used as heat storage room lattice bricks in glass kilns.

Magnesia brick is used for permanent layers in steel making converters, AOD furnaces, and more. Magnesia brick is also used to line steel ladles and Basic Oxygen Furnaces (BOFs). Magnesia bricks can be used in a variety of applications, depending on the type of brick being used. Common uses include furnaces, ladles, secondary refining vessels, and cement and glass making kilns.

Magnesia Brick for sale

The most important steps need to be considered to avoid or reduce the possibility of magnesia bricks hydration are:

1). Magnesia bricks must be transported in a container to protect the material against moisture.

2). Magnesia bricks should be stored inside storage rooms where it is dry, free of frost, ventilated, and with a temperature between 10°C and 30°C. Note that magnesia bricks storage underneath a tarpaulin cover outside is not sufficient.

3). Bricks may not be stored for more than four weeks prior to installation and preheating.

4). Lining should be protected against moisture during installation and preheating.

Article Source:How to make magnesia brick Company name: Henan Changxing Refractory Materials Co.,Ltd More refractory products:https://www.cxrefractories.com/en-all-refractory-products Email:info@cxrefractories.com Website:https://www.cxrefractories.com

[chinarefractorymaterial]

Magnesia Carbon Brick

Magnesia Carbon Brick Changxing Refractory is able to manufacture magnesia carbon brick for every ladle, EAF, and BOF. We will design you a well-balanced lining, providing optimal performance at the lowest possible cost. Our MgO-C bricks is made from more than 98% electrically fused magnesite, high purity graphite and metallic antioxidants as needed. Size and specification can be tailored…

[cxrefractories]

Changxing Refractory offers BOF refractory product with best quality. Main products: MgO C Brick, Tap Hole Brick, Bottom Blowing Purge Plug, Converter Furnace Patching Material, Skimming Ball ,Light Calcined Magnesia Ball.

[cxrefractories]

BOF furnace classification and related refractories CX

BOF is a vertical cylindrical furnace that does not require an external heating source and mainly uses liquid pig iron as raw material for steelmaking. According to the nature of refractory lining, it can be divided into acid BOF and alkaline BOF. According to the position where the gas is blown into the furnace, it is divided into bottom blowing, top blowing, side blowing and top and bottom combined blowing BOFs. Because of the different components of molten iron and refractory resources in different countries in the world, the choice of furnace lining bricks is also emphasized. The United States mainly uses tar-combined magnesia bricks, periclase bricks, and tar impregnated and fired periclase bricks. Magnesia carbon bricks have also been used since the 1990s. France mainly uses dolomite bricks, magnesia dolomite bricks, dolomite carbon bricks, asphalt bonded magnesia bricks and magnesia carbon brick. The United Kingdom once used tar dolomite bricks and fired dolomite bricks. After 1989, a large number of MgO?C?bricks were used. Russia mostly uses tar dolomite bricks, and a few factories also use tar magnesia bricks and periclase spinel bricks. Japan is the first country to move magnesia-carbon bricks from electric furnaces to BOFs, and its use effect is in a leading position in the world. The development of BOF lining in China has gone through the process of tar combined with dolomite bricks, tar combined with magnesia bricks, magnesia dolomite bricks, high calcium magnesia bricks, magnesia dolomite carbon bricks and magnesia carbon bricks. In summary, all countries in the world are gradually using magnesia carbon bricks to replace other bricks. Magnesia carbon brick has good thermal shock resistance, strong corrosion resistance, excellent stability at high temperatures, good thermal conductivity, good wear resistance and good spalling resistance, plus the improvement and progress of smelting technology and gunning technology Since the 1990s, the service life of furnace lining has been greatly improved, and the consumption of refractory materials per ton of steel generally does not exceed 2kg.

Article Source: BOF furnace classification and related refractories Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd Email: info@cxrefractories.com Website:http://www.cxrefractories.com

[cxrefractories]

Refractory material for BOF steelmaking

Converter steelmaking is currently the main steelmaking method, and about 65% of the world's steel is converter steel. Our country is currently dominated by converter steel.? As far as the entire converter lining is concerned, high-temperature slag erosion is the main cause of damage to the refractory lining. The hearth is also the weak link of the converter. The parts where refractory materials are seriously damaged are: the charging side, the slag line and the trunnion.? The loading side not only receives the erosion and erosion of molten steel and slag, but also is directly impacted and eroded by scrap steel and molten iron. The combined effect of slag erosion and impact has worsened the damage to the refractory lining of this part. Generally, products with high slag resistance and high temperature strength are used, such as high-purity magnesia dolomite bricks, various high-quality magnesia bricks, and magnesia carbon bricks.? The slag line is mainly slag corrosion, which is relatively light on the tapping side, and the slag discharge side is more damaged. Therefore, refractories are required to have good slag resistance. At present, high-quality MgO-C bricks and MgO-CaO-C bricks are mostly used.? In addition to other causes of damage, the trunnion part is also affected by serious mechanical stress, and there is less slag discharge at this part, refractory materials are not protected, and the carbon-containing lining is easily oxidized. At present, more high-strength MgO-C brick are used in this part.

Article Source: Refractory material for BOF steelmaking Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd Email: info@cxrefractories.com Website:http://www.cxrefractories.com

[chinarefractorymaterial]

Magnesia Carbon Brick, Magnesia Carbon Bricks Manufacturers, Magnesia Carbon Bricks Composition - Changxing Refractory

Magnesia Carbon Brick

Magnesia Carbon Brick

Introduction

Changxing Refractory is able to manufacture magnesia carbon brick for every ladle, EAF, and BOF. We will design you a well-balanced lining, providing optimal performance at the lowest possible cost. Our magnesia-carbon brick is made from more than 98% electrically fused magnesite, high purity graphite and metallic antioxidants as needed. Size and specification can be tailored according to furnace type.

Changxing Refractory magnesia carbon refractory brick factory is located in the magnesium capital of China, and products with high bulk density and low porosity.

Magnesia Carbon Bricks Manufacturers series used for the electric furnace are made by adoption of fused magnetite, high-purity magnesium sand and graphite as principal raw material, through high-pressure molding and low-temperature treatment. This product is mainly used for electric furnace lining, which enjoys advantages including high temperature resistance strength, corrosion and spalling resistance. According to the smelting conditions and the kind of smelting steel, different brands Magnesia Carbon Bricks Composition are available. Magnesia-carbon bricks are resin bonded bricks containing high-purity fused and or sintered magnesia and flake graphite as their main ingredients.

Advantages

Magnesia Carbon Brick has excellent corrosion resistance together with good thermal shock properties. It offers good oxidation resistance due to use of high purity flake graphite.

Application

Magnesia Carbon Brick is widely used in Electric Arc Furnace sidewalls, converters, hotspots and coldspots, and ladle furnace slag lines.

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