Reheating furnaces in steel Industry

In steel plants reheating furnaces are used in hot rolling mills to heat the steel stock (Billets, blooms or slabs) to temperatures of around 1200 deg C which is suitable for plastic deformation of steel and hence for rolling in the mill. 

Different type of batch and continuous furnaces are described below.
1.Batch furnace -These are the older type of furnaces which are capable of heating all grades and sizes of steel. 
2.Continuous pusher furnace– In this type of furnace cold steel stock is pushed forward with the help of pushers at the charging side. 
3.Rotary hearth furnace – A rotary hearth furnace is used for heating round billets in pipe plants and for heating short length blooms or billets in a forging plant.
4.Walking beam furnaces – Initially walking beam furnaces were designed with alloy steel walking beams which were exposed directly to the furnace heat and were also subjected to heat corrosion. 
5.Walking hearth furnaces – It is similar to the walking beam furnace when passage of steel stockl through the heating chamber is considered.
6.Roller hearth reheating furnaces – Roller hearth furnaces are used to advantage when heating very long billet, bloom or slabs in the situation where it is not practical for heating in a pusher or walking beam furnace.

Today we are talking about is continuous pusher furnace,Advantages of the pusher type furnaces are as follows:

• High production per unit capital investments

• High hearth area efficiency

• Higher specific production per unit of space utilized.

• Low maintenance cost

• Ease of charging and discharging of material

• Lower temperature differences between two pieces of material pushed.

• More control of the rate of heating at all temperature levels.

• Gradual rise in temperature permits charging of all grades of cold materials.

• Can be built for larger length of the piece to be heated to have higher rolling mill yield

Re-heating furnace

As a professional and experience manufacturer in China, We can give turn-key service from foundation excavation, rolling line design, equipment manufacturing, installation and debugging, technician training depending on prominent capacity of designing and manufacturing and abundant practical experience of installation.

Introduction to Rolling steel -Part 2

A continuous rolling mill has a series of rolling mill stands arranged in succession so as to increase productivity. The steel stock moves at different velocities at each stand in the mill.

In a broader sense, a rolling mill is an automatic system or line of roll stands along with a series of equipments that performs both rolling and auxiliary operations: transport of the original billet/bloom/slab from the stock to the heating furnaces and the mill rolls, transfer of the rolled material from one roll stand to another, turning or twisting in case of some mills, transport of the metal after rolling, cutting, cooling the rolled material on cooling bed in some mills, marking or stamping, trimming, packing, and conveyance to the stock of finished product. In some mills (e.g. hot strip mill, wire rod mill, merchant mill, and cold rolling mill), the rolled product is coiled in a coiler or a wind up reel.

There are different types of rolling mills. These are given below.
1. Continuous rolling mill
2. Reversing rolling mill
3. Transverse rolling mill – Uses circular wedge rolls. The heated bar is cropped to length and fed in transversely between rolls. Rolls revolve in one direction in the mill.
4. Shaped rolling or section rolling mill – Shaped rolling mills are bar mill, merchant mill, wire rod mill, structural mill, beam mill, and rail mill.
5. Powder rolling mill – Metal powder is introduced between the rolls and compacted into a ‘green strip’, which is subsequently sintered and subjected to further hot-working and/or cold working and annealing cycles.
6. Thin slab casting and rolling mill – This is used for the production of hot strips. Liquid steel is cast in thin slabs (thickness 50 mm to 80 mm) which are rolled in finishing mill of hot strip mill after temperature equalization in a furnace.

The above parameters may singly or jointly, in combinations of two or more, generate secondary parameters and phenomena more directly related to and commonly associated with the rolling process. Roll pressure, torque, work and power are influenced by these 
factors.

As a professional and experience manufacturer in China, We can give turn-key service from foundation excavation, rolling line design, equipment manufacturing, installation and debugging, technician training depending on prominent capacity of designing and manufacturing and abundant practical experience of installation.

Steel Rolling Production Line (turnkey service)

Information on hot rolling mills and turn-key project

Induction bending is also referred to as hot rolling, but there are some differences between the two processes. Our range of hot rolling mills are extensively used for shaping large pieces of metal, such as slabs or billets. These pieces of metal are heated above their recrystallization temperature and then deformed between rollers to form thinner cross sections. The hot rolling produces thinner cross sections than cold rolling processes with the same number of stages. Hot rolling will reduce the average grain size of a metal, while maintaining an equipped micro structure.

As any Company or Individual takes on the idea of entering into the field of installing and running a hot rolling mills, the first thing they would do is take a market survey of companies who are in the business of supply designing, manufacturing, installation and commissioning of the rolling mills equipment as requirements. 

Now, this process, in commercial terms is known as Turn Key project. For e.g. If a foreign company wants to install a hot rolling mill, they would search for the companies who would manufacture/supply/install all the machinery and give them a trial production start-up. Now, not necessarily the turn key project company will be based in the same country, and hence, they have to depend upon foreign turn key project handlers for this project.

We are rolling mills and continuous casting machine manufacturer in China, which the final products are round steel, deformed steel and wire rod. There will be good cooperation chance If you

1. Have the raw material of billet or steel scrap
2. Want to build a steel factory
3. Don't know how to process or design the production line
4. Want to add the production line
5. Want to purchase the accessories
6. Want to reduce the invest budgets since the high cost from European countries and long term RIO period

Steel Rolling Production Line (turnkey service)

What is cooling bed

The development of steel rolling production is not only depends on improvement of speed and shortened of rolling period of mill main equipment( rolling mill) , but also so much of that depends on perfection and improvement of auxiliary equipment. the mechanization and automation of auxiliary equipment and it's productivity can direct affects the modernization development of rolling mill and improvement of productivity.

Cooling bed is an important equipment in the field of steel rolling. It used to receiving, transmissing and cooling the rolled piece. After sizing or reducing , the temperature of pipe is generally above 700 °C. It must be cooled to below 150 °C for subsequent finishing process. The pipe cooling is usually carried out on cooling bed. 

Cooling Bed for Rolling Mill

The cooling bed is consist of mechanism transmission system, water cooling system, cooling bed platform and fixed support and so on. There are many types of cooling bed, such as following:
Rack and walking beam cooling bed
Chain-type cooling bed
Roll-disc cooling bed
Section steel cooling bed

We are rolling mills and continuous casting machine manufacturer in China, which the final products are round steel, deformed steel and wire rod. There will be good cooperation chance If you 

 - Have the raw material of billet or steel scraps- Want to build a steel factory- Don't know how to process or design the production line- Want to add the production line- Want to purchase the accessories
- Want to reduce the invest budgets since the high cost from European countries and long term RIO period

Walking Beam Cooling Bed