Categories
Blogs

Key Factors to Consider While Choosing a Rolling Mill Manufacturer

 

When picking a rolling mill machinery manufacturer, you want to select the best out of all of them. The proper rolling mill machinery manufacturer ensures that your needs are met without errors and still upholds your standard. Here are some factors you need to consider when picking your manufacturer. 

1. Condition of Production Facility 

The condition of the production facility says a lot about the quality of products. You want your rolling mill machinery to be the best in class to create high-quality products. Top-quality rolling mill machinery manufacturers like The Steefo Group pay attention to every detail, from the raw material to the equipment used during the process. When you select good quality manufacturers, you are guaranteed to get premium results up to par with your standards. 

2. Variety Of Products Offered 

An average steel rolling mill manufacturer offers various products for varied industries. Top rolling mill machinery provider, The Steefo Group, has a huge range of products, including reheating furnaces, mill stands, shears, gearboxes, loppers, quenching systems and more. This gives you a better overview of the technology they employ regarding their products. A suitable steel rolling mill manufacturing plant caters to all these requirements by offering superior quality products for different industries.

3. Attention To Quality Control 

When searching for the perfect manufacturer, you must understand their commitment and overall quality control process. Manufacturers like The Steefo Group are consistent in quality and therefore have a 100 percent customer and client satisfaction rate. Your manufacturer should guarantee quality and meet your desired standards through stringent norms. Most high-quality rolling mill machinery manufacturers have a dedicated quality assurance team that examines the products and machines being created. They also should ideally perform quality change throughout all the stages. 

4. Valid Certification 

All rolling mill machinery manufacturers must maintain a certain standard of quality. The bar complies commonly with ISO and viz. One of the most premium rolling mill machinery manufacturers, The Steefo Group, complies with ISO 9001:2015 certification. Therefore, ensure that the manufacturer you will select and work with has the proper and valid certificate to guarantee that your standards are not compromised. 

5. Innovation, Research and Development:

Any manufacturer should always focus on moving ahead, investing in research and innovation and focusing on development. Its dedicated research and development team indicates a great manufacturing company. This indicates that the company is constantly working to fix any errors and improve the current process and create a more streamlined version. Manufacturers such as The Steefo Group utilizes software such as CAD and Kisssoft to enhance ongoing development that meets the industry standards to become not the only provider of both rolling machinery and solutions. Before selecting, find out if there is an R&D team and if so, get in contact with them to see if their vision of the future aligns with the vision you have for your company.

6. Distribution And Delivery 

When you work with a manufacturer, timing is crucial to the entire operation. The delivery of the products and machinery will determine the time required to finish the task efficiently while maintaining customer satisfaction. Distribution and delivery are also important to get ahead of the competition. Check if the rolling mill machinery manufacturer has a well-connected and reliable distribution and delivery model, as it will ensure a seamless and stress-free delivery process. 

Why Should You Pick The Steefo Group To Be Your Rolling Mill Machinery Manufacturer?

When you select The Steefo group, you are getting guaranteed quality. You get access to the most innovative and futuristic products that will allow you to transform your business. The Steefo Group specializes in everything,  from turnkey projects to products, depending on the demands of your business. From TMT bar rolling mills and wire rod mills to products such as mill stand, rolling mill gearboxes, reheating furnaces and more. 

Our projects and products also undergo thorough testing and strict quality checks to supply you with the best machinery and products. Our focus on technology and innovation also provides you with the most up-to-date products for your rolling mill. 

To learn more about the Steefo Group and their products and how they can improve your productivity and profits, contact +91 98240 76873 or drop a mail at marketing@thesteefogroup.com

Categories
Blogs

Reheating Furnaces In Steel Rolling Mills

 

Reheating Furnaces serve the purpose of heating steel blooms, billets or slabs in steel rolling mills. Reheating furnaces takes this steel stock up to approximately 1200 degree Celsius. The steel begins to deform at this temperature, and the steel rolling process can begin. In a reheating furnace, the heat provided to the steel stock is constant. The stock is charged at the entrance, heated up to the assigned temperature in the furnace and discharged at the reheating furnace exit. During the process, the heat gets transferred to the stock in the furnace with the help of radiation and convection. This takes place due to the placement of the burner gasses and furnace walls. 

How Does The Heat Transfer Mechanism Operate In A Reheat Furnace? 

A steel stock charging temperature can vary drastically, ranging from ambient to the high temperature of 1200-degree celsius. Depending on the dimensions of the steel stock, speed of rolling, and overall steel composition, the exit temperature of a steel stock might differ. The factor of steel quality also plays a huge role when it comes to temperature as it puts limitations on the surface and gradient temperature. It is to be noted that both gaseous and liquid fuels are used in these reheating furnaces. 

What Are The Main Characteristics Of A Reheating Furnace?

A Reheating furnace’ size depends on its ability to produce hot steel from the cold steel stock and is calculated in tons per hour. The increased heat content determines a reheating furnace and its energy efficiency. When the steel stock is heated from 10 degrees celsius to approximately 1200-degree celsius and is then divided by fuel energy used, efficiency can then be calculated accurately. The energy efficiency of a furnace also relies upon the design aspects of various reheating furnaces. 

Design Features That Plays A Role In The Energy Efficiency Of A Reheating Furnace

  • Different styles of burners
  • Dimensions of a Reheating Furnace. 
  • The total number of furnace zones 
  • Different kinds of roof and wall insulation
  • Design of skid 
  • Combustion air and preheating fuel in recuperators

An energy-efficient reheating furnace is developed in a particular method to allow the steel stock to heat up at a uniform temperature without consuming too much labour and fuel. 

Here are Some of The Important Parameters That A reheating furnace must include:

  • The amount of heat that must be imparted to the charge
  • Creation of necessary heat inside the reheating furnace required to heat the stock and curb steel losses
  • The transfer of heat created onto the surface of the stock that needs to be heated
  • Temperature equalisation within the stock 
  • A decrease in heat losses from the reheating furnace to a minimum 

Several operational approaches also play a crucial role in the energy efficiency of a reheating furnace. The ideal case of a reheating furnace is when the furnace is operated at the rated capacity with one kind of steel stock, which has the same dimension and composition. But often, this practice is not followed, which hampers the efficiency of the reheating furnace. 

Factors that Affect Efficiency of A Reheating Furnace

  • Differences in the dimension and composition of steel stock 
  • Delays in rolling can delay or halt the movement of steel stock in the furnace 
  • The composition of the fuel and its availability may differ
  • The conditions of the burners and the internal  state of the reheating furnace might deteriorate 

How are Reheating Furnaces Classified?

Several types of reheating furnaces are available in an average steel rolling mill, but how are they classified into different categories? Reheating furnaces are usually placed in four categories based on:

  • Heating Method 
  • Charging the reheating furnace method 
  • Steel stock movement inside the reheating furnace
  • Recovery of the heat method

If the reheating furnace is classified based on the heating method, there will be two types of heating.

  • Electrical Heating 
  • Combustion Heating 

Combustion heating reheating furnaces are able to use solid, gaseous and liquid fuels.

When the classification is based upon the steel stock’s movement in the furnace, a continuous furnace can be categorized further.

  • Pusher Furnace 
  • Walking Beam Furnace 
  • Roller Hearth Furnace 
  • Walking Hearth Furnace 
  • Rotary Hearth Furnace 

When the classification depends on heat recovery, there are only two types of reheating furnaces.

  • Regenerative Type 
  • Recuperative Type

The regenerative type of reheating furnace operates on regenerative burners. On the other hand, the recuperative variety of reheating furnaces functions with recuperators. 

Why Choose Reheating Furnaces From The Best Rolling Mill Manufacturers

When you select reheating furnaces from The Steefo group, you are guaranteed superior quality. Get your hands on the most innovative and futuristic products that will help you change the face of your business.  

Our projects and products also experience strict testing and quality checks to deliver best-in-class products. Our emphasis on technology and innovation also delivers up-to-date products for your rolling mill. 

To learn more about the Steefo Group and our reheating furnace and how they can improve your productivity and profits, contact +91 98240 76873 or drop a mail at marketing@thesteefogroup.com

 

Categories
Blogs

Why are Mill Stand A Necessary To Your Rolling Mill?

 

Mill stands are one of the most crucial pieces of equipment in the entire rolling mill process. A mill stand is usually fit with numerous rolls via which the workpiece bar goes through, achieving its necessary cross-section. Several mill stand designs serve different purposes in the rolling process.

Housing-less Mill Stand 

A Housing-less mill stand is specifically designed to create superior quality TMT bars, wire rods, channels, bars, universal beams, angles and more. The housing-less mill stand can do this effortlessly due to its rigidity and roll change abilities. These mill stands are usually also equipped with complete automation, especially during the connection and disconnection of fluid utilities and spindles. This automation assists the mill stand in becoming more efficient and quick in comparison to others. Housing-less mill stands also have a reduced stress path, screw-down automation, axial roll adjustment abilities along with complete automation, self-balancing spindle and reduced backlash. Roll change is easier in the same.

2-HI Conventional Mill Stand 

A 2-HI conventional mill stand has two work rolls that are pressed together with enormous force. The 2-HI mill stand contains non-reversing rolls that rotate in the same direction, which means that the workpiece bar cannot be fed from the other direction. A 2-HI stand either has to be a vertical or a horizontal stand.

3-HI Conventional Mill Stand 

A 3-HI mill stand is essentially needed in hot rolling reversing mills without switching the order of rotation of the rolls. In this type of mill stand, there are three working rolls. The top and bottom roll rotate in the same direction; meanwhile, the centre roll turns in the opposite direction. This is important as the workpiece bar keeps passing back and forth alternately through the rolls without reversing the direction in which the roll turns.

Pre-Stressed Mill Stand

Pre-stressed mill stands are different from conventional mill stands. In this case, the mill is already pre-stressed with the help of hydraulic four nuts. This allows them to be prepared with the highest force needed for rolls operating during the rolling period. The process allows any deflection of the mill stand to be avoided, especially under the rolling load. 

Universal Mill Stand 

A universal mill stand is a rolling stand that rolls in four ways. It is used in the rolling section where the section is shaped from all four sides. There are two vertically and horizontally mounted rolls in a universal mill stand. The vertical rolls are inactive and are positioned amid the bearing chocks of the horizontal rolls in the vertical plane. The vertical rolls are essentially present to manage the width of the bar during the rolling process. 

Convertible Stands

Convertible mill stands allow conversion in the positioning. The stand allows either vertical or horizontal positioning during the intermediate finishing, depending on the production requirements. Convertible mill stands are convenient due to their speed during changing positions. It takes less than two minutes to do so. The stand rigidity is also an added advantage. The quick stand change system also does require any crane support and is equipped with reduced fountain depth. 

Cantilever Stand

A cantilever stand is quite similar to a block mill, has both horizontal and vertical configurations, and can be configured to meet the client’s design requirements. The sleeve bearing on which the rolls are mounted can achieve high speeds and produce wire rods ranging from 5.5mm to 8mm.  The rolls are essentially small discs placed on the cantilever shafts and are available for one or two passes. The material o the roll is often hard and is created out of tungsten carbide.

Vertical Mill Stand 

This up-drive type comprises a roll stand, mill spindles, a vertical gear reducer, a pinion stand, and a motor. To protect them from the roll cooling water and mill scale, the gear reducer and motor are installed on a concrete frame. There is also a lifting device under the roll stand that is installed to manage the position of the caliber to pass the level. The roll stand can be moved to the work side during stand changing.

Horizontal Mill Stand

The horizontal mill stand comprises of a roll stand, mill spindles, a pinion stand, a gear reducer and a motor. In the case of a regular pass line, the roll stand slides on the exterior of the sole plate. In a low-speed rolling mill with less than 10 m/sec, the pinion stand and gear reducer are from a single unit. A cross pin joint is used for the mill spindle and is supported by the spindle carrier during rolling.

Bottom line

In a rolling mill, rolling mill stands are used for several purposes, including generating billets, slabs, blooms, bars, plates and other sheet products. Rolling mill stands were initially used for steel casting, but today they are usually created from cast slabs or rolled plates.