Charcoal and the General Steel Making Process

When one thinks of charcoal, we normally think of the most important historical use of wood charcoal; as the main ingredient in gunpowder. However, it was of major importance in metallurgical operations as a reducing agent, primarily in the manufacture of steel. The most common use in the modern era for charcoal is as a fuel source, but still has industrial application. The Charcoal Hearth Process was vitally important in the early industrial steel age.

Only a good quality of pig iron (nearly always charcoal pig) is used, as the process is expensive, and is employed only for a high grade of wrought iron. The pig iron is often given a preliminary refining to eliminate most of the silicon. The hearths are usually built of unlined cast-iron plates, at least in part water-cooled. Brick-work is avoided as the silica would enter the slag. The processes may be classified according to the number of times the metal is melted down before the tuyere, into single melting, double melting, and triple melting (or German or breaking up); into Walloon and non-Walloon.

The hearth may be covered or uncovered; if the latter it is called an open fire or open hearth; if the former, a closes hearth. The bloom, after rolling, is called finer's bar (cor- responding to muck bar in puddling), and after piling and rerolling, finished charcoal bar. German general steel  is an obsolete name for the product obtained by melting white or refined pig in a charcoal hearth; it may also be made of poorer quality. In the Bohemian process, mottled or even gray pig is used, and the blooms are reheated in the same hearth. Charcoal is first charged, and on top of this some slag and the pig which is melted down slowly, the iron cake which is formed being frequently raised up. The cinder is tapped at intervals. Finally the bloom is welded to the end of a rod and taken to the hammer; any particles of iron that remain in the hearth are retreated.

The use of charcoal in steel making rapidly diminished with the introduction of coke, anthracite smalls, etc. for industrial processes.

Straightening Machine for Steel Making

Ladle Turret

There is one rotating arm on each side of the turret. The arm with the ladle will stop over the tundish after rotating 1800. Then open the slide gate in the ladle to pour the liquid steel into the tundish. When the pouring of this ladle is about to be finished, the other ladle full of the liquid steel can be put on the other arm of the turret. As long as 1800 rotary movement, the liquid steel in the second ladle can be rapidly and continuously supplied for pouring. The ladle change time is only about one minute. The turret is convenient for remote controlling pouring. But the turret needs a big one-off investment cost and high requirements for repair and maintenance.

This type ladle doesn't have ladle lifting device. It has cover lifting and rotary device for lowering. There is a weighting device on turret. The pouring operator can know the level from the display data.

The ladle turret is driven by the hydraulic motor. This driving method has the following advantages.
A. a longer life and convenient repairing and maintenance
B. a lower run cost
C. stepless speed change and regulating
D. if power-off, the hydraulic motor can be rotated out by the accumulator.

Ladle Turret for CCM

Re-heating furnace

Why you shouldn't forget about your furnace?


Airflow:

Like a heart, your furnace is responsible for keeping everything moving. Winter, summer, spring or fall, the furnace is pushing air through your

The type of fan motor your furnace uses can affect the comfort level in your home, and the amount of energy you use.

Single-speed motor(PSC): Operates at full blast, or not at all. Found in less efficient furnaces.

Constant Torque Motor:  Can adjust airflow based on heating or cooling need to maintain even circulation. Operates quieter on continuous fan speed and offers efficiency savings up to 33% more than standard single speed motors.

Variable-speed motor: Provides the highest level of comfort and energy efficiency.  Variable-speed motors can operate at high speeds, low speeds, and anywhere in between, ramping up and down like a dimmer

The ECM (Electronically Commutated Motor) gives you increased comfort by accelerating and decelerating slowly, which eliminates sudden gusts of air. The soft start and the soft stop make it a quieter furnace.

Heating is one of the most popular and best heating ways of metal material,has been widely used in fields applying oil,gas and coal heating,and is superior to oil,coal or other similar heating products by speedy heating,high efficiency and low production cost,low heating radiation,labor intensity and pollution conforming to environmental protection requipment

Re-heating furnace

How steel rolling mill machines are helpful in business

In today's technological world, things are going on a very fast speed and we all have to be prepared for all those changes and things. With the advancement in technology, people are inventing new things for making their task easier. Machines are one of those invented things. Machines are really proving as a great helper of a man. A machine has saved a lot of time and efforts. Different machines are used for different purposes. Machines are categorized on the basis of their sizes, work type and cost.

Industrial area is growing or expanding very fast. Due to its growth, different factory holders want different types of machines for their work. Different types of machinery are used for different purposes and steel rolling mill machinery is one of them. . Before going ahead, you should know about its purpose as for what purpose it is used. This machinery is used for making steel, lead and alloy sheets. Now you know about its uses. Now let's know about its types.

Steel rolling mill machinery is categorized as follows:

Cold rolling mill machinery:  If the temperature of the metal is below the recrystallization level then metal is rolled in cold  This process is used to reduce the size and thickness of the metal. This process is divided into four more processes depending upon the function such as skin rolling, quarter hard, half hard and full hard.

Hot rolling mill machine:  If the temperature of the metal is above than its recrystallization level then metal is rolled in hot rolling mill machinery. This machinery is used for making metal sheets. This process is used at an early stage of metal production which shapes heated metal into general form which can then be used in cold rolling process.

Tandem Rolling Mills for Wire Rod

Charcoal and the General Steel Making Process

When one thinks of charcoal, we normally think of the most important historical use of wood charcoal; as the main ingredient in gunpowder. However, it was of major importance in metallurgical operations as a reducing agent, primarily in the manufacture of steel. The most common use in the modern era for charcoal is as a fuel source, but still has industrial application. The Charcoal Hearth Process was vitally important in the early industrial steel age.

Charcoal Hearth Processes were sometimes, but rarely, called forge processes, and bustling and buzzing are very obsolete terms. These processes are designed for the production of wrought iron (charcoal iron), usually by refining cast iron, occasionally by melting scrap before a tuyere with charcoal for fuel, the product being obtained in a pasty condition, and containing a certain amount of slag, but less than puddled iron. Only the latter method survived the early 20th century in this country.

In general the furnaces or hearths are like the Catalan and bloomary hearths for reducing iron from the ore, low, rectangular chambers, sometimes roofed, and with one or more tuyeres. The chief difference is that in refining cast iron much more strongly oxidizing conditions are brought about, chiefly by melting the metal down in drops before the tuyere, repeatedly, if need be, so that it passes in a state of minute subdivision and with great surface exposure through a part of the hearth where the atmospheric oxygen is in excess; and by the action of the basic ferruginous slag with which the metal is mixed during the earlier stages, and with which it is covered during the later stages, to ward off the strongly carburizing tendency of the charcoal.

Only a good quality of pig iron (nearly always charcoal pig) is used, as the process is expensive, and is employed only for a high grade of wrought iron. The pig iron is often given a preliminary refining to eliminate most of the silicon. The hearths are usually built of unlined cast-iron plates, at least in part water-cooled. Brick-work is avoided as the silica would enter the slag. The processes may be classified according to the number of times the metal is melted down before the tuyere, into single melting, double melting, and triple melting (or German or breaking up); into Walloon and non-Walloon.

Hydraulic shear

Rolling Steel Doors - The Most Robust Doors Available

Outdoor spaces are ideal for parking vehicles and storage purposes. Today, most of the residential structures and commercial garages have such spaces for storing useful or scrap objects. As these spaces are designed to store objects and accommodate vehicles as well, they must have doors for safety purposes. If you think about using such spaces without doors, then you might have to restrict its usage. So, putting a robust door on such places would give you the opportunity to put your valuables as well without any trouble.

So, if you are also looking for such kinds of robust doors, then you can easily avail them online. There are various types of doors available that include industrial rolling steel doors, residential rolling steel doors, rolling steel doors for garages, and more. These doors are majorly made of steel or galvanized aluminum, which makes them ideal to protect shops and stores against fire and robbery. And, the best part is that they don't take extra space while opening and closing.

Cooling bed play a key role in steel rolling.  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.

Features:
Application: Section steel
Certification: ISO 9001
Payment term: L/C, T/T or what you prefer.

Adventage:
High quality
Easy control
Simple structure

Section Steel Cooling Bed

Some of the diverse applications of Stainless steel seamless pipe

Stainless steel seamless pipes have become very common these days and are offered by almost all steel pipes manufacturers. The benefits such as higher corrosion resistance than carbon steel and conventional stainless steel and light –weightiness make the design and construction compact and light. Stainless steel is composed of copper, chromium, nickel, tungsten, manganese, etc. and is therefore rust resistant. Stainless steel seamless pipes can prove to be a cheaper alternative to the nickel alloys, which are very costly. Steel has higher strength which leads to reduced thicknesses of section and therefore has reduced weight. It also exhibits good weld ability in thick sections and the ability to be welded is more in stainless steel. Resistance to stress corrosion cracking: Austenitic steel is prone to such corrosions. The resistance posed by stainless steel to stress corrosion cracking makes this material fit for purposes like Hot water boilers, brewing tanks and desalination, structure of swimming pools, etc.

Some of the advantages of using steel seamless pipes in the industry

Increased strength leading to saving of weight.
It has  better stress corrosion resistance
Price is lower as compared to other alloys
These pipes can handle a lot of pressure and adverse weather condition.

Section Steel Cooling Bed
Cooling bed play a key role in steel rolling.  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.

 Section Steel Cooling Bed