Hydrogen energy is regarded as the most promising clean energy in the 21st century, with the advantages of diverse sources, clean and low-carbon, flexible and efficient, and rich application scenarios. The current hydrogen metallurgy process mainly includes blast furnace hydrogen-rich smelting and direct hydrogen reduction. The main purpose of blast…
Classification of the residual elements Residual elements in steel are divided into three categories according to their oxidation potential, fully reserved elements, partial reserved elements and minimal reserved elements. The oxidation potential of the fully reserved elements Cu,Ni,Co,As,W,Mo,Sn,Sb is lower than iron, does not participate in the oxidation reaction during…
The high speed wire rod rolling mill process is flexible, complete control means, can produce a wide range variety of high-quality wire rods. Twist-free finishing mill units both in production efficiency and product quality are greatly superior to the open-train mill, even in the lower speed range, its performance is…
Rough rolling will make the billet compressed or stretched, and delivers qualified work pieces with the right section shape, qualified size and good surface. Generally the section size of rolled pieces after rough rolling process is more than or equal 50mm. The rough rolling process is different because there are…
Phosphorus element is generally expressed as [P]. Phosphorus’s influences to steel properties To deteriorate the welding properties of steel. To reduce the plasticity and toughness of steel, thus steel is cold brittleness, that is, the impact toughness of steel at low temperatures is significantly reduced. To make steel easily processed…
At early stage of bar production line, open-train mill is main equipment but people discover its inadequacy and limitations. In order to reach more high yield with lower cost, factories optimize rolling process and improve performance of equipment and process. In result, the semi-continuous rolling mill replaces the open-train mill,…
The prerequisite of the project shall have reliable energy supply (water, electricity, fuel) and land resources. Then the project owners must carefully plan the factory and set its capacity, raw material, products and process. SME specializes in the metallurgy industry, especially in the steel Turnkey or EPC project. We have…
Rolling mill is one of the most important equipment in steel plants. Modern advanced technologies provide the most possible to manufacture high quality mills. Here common mills are classified by the structure of rolling mills. 2-high mill The 2-high rolling mill has a simple structure and can reciprocate to roll…
3. Slitting Rolling Process The slitting rolling is mostly used in bar continuous or semi-continuous rolling lines, and can greatly increase output of small-size rebar. This rolling process simplifies billet specifications and pass design, improves mill output, for the same section of the rolled part, comparing normal rolling process, the…
Along with modern technology development, more and more steel entrepreneurs induce advance processes to improve product quality and plant efficiency. For steel bar production line, the following processes are used commonly. 1.Direct Rolling Billet Direct rolling technology is suitable for production lines to make plain carbon steel and low alloy…
