Slow wind operation
Slow wind blowing is a blast furnace operation method that reduces blast furnace productivity and pressure in the furnace, allowing the blast furnace to operate in a reduced wind state. Situations tha...
Channel steel specification table and channel steel theoretical weight table
The specifications of channel steel are expressed in millimeters of waist height (h) * leg width (b) * waist thickness (d). For example, 120*53*5 means that the waist height is 120 mm and the leg widt...
Slit rolling method
There are currently four force methods for split rolling: (1) Roll cutting method: The rolling in the laser cutting copper pass is used to deform the rolled piece and achieve cutting at the same time....
How are the materials of steel differentiated?
, The concept of steel: Steel is a steel ingot, billet or steel material that is made into various shapes, sizes and properties that we need through pressure processing. Steel is an indispensable mate...
Nozzle end and bottom structure design
The so-called end-bottom structure refers to the structural arrangement between the water pocket at the bottom of the nozzle and the end wall. This involves the shape of the water pocket, the central ...
The use of new Mini descaling nozzles on ordinary slab hot-rolled strips
1. Development trend of common slab descaling at home and abroad In recent years, in order to meet the descaling requirements of thin slab short-process hot rolling (hereinafter referred to as CSP) pr...
Semi-rigid flame-retardant plastic pipe concealed construction technology
1 Scope This process standard is applicable to electrical lighting concealed pipe wiring projects in general civil buildings, and shall not be laid in high-temperature places, places susceptible to me...
Types of cadmium plating baths
It can be divided into the following four types: (1) Alkaline cyanide plating bath. (2) Alkaline sulfate plating bath. (3) Acidic boron fluoride salt plating bath. (4) Neutral sulfate plating bath. Th...
Pudelin method
Medieval smelting method for mass production of wrought iron. Also known as the mixing method. The structure of the Pudelin furnace is similar to that of a plain furnace, except that there is no lower...
Common knowledge about microalloyed strip steel
Over the past 25 years, microalloyed steels (MA) have dominated the field of high-quality steels. Developments in recent years have shown that microalloyed steel is the best choice when high performan...
How to set the valve
General Setting Regulations 1.1 Overview These regulations apply to the chemical process system major. The valves mentioned do not include safety valves, steam traps, sampling valves and pressure redu...
Furnace conditions are biased
Asymmetrical descent of burden is a manifestation of abnormal furnace conditions during the blast furnace ironmaking process. At this time, the unloading speeds on both sides of the blast furnace are ...
Structural features of high-efficiency continuous casting machine
Compared with traditional continuous casting, high-efficiency continuous casting is characterized by high casting speed, high quality, high efficiency, high operating rate, and high temperature castin...
Deformation characteristics of thinning spinning
Thinning spinning, also known as powerful spinning, is developed on the basis of ordinary spinning. Its deformation characteristics are: the mandrel drives the blank to rotate, and the rotating wheel ...
Speed system of blooming mill
The rolling characteristics of steel ingots on the blooming mill are that the rolled piece is rolled back and forth, the rollers rotate forward and reverse, and the roller speed changes continuously a...
Deformation during rolling
Deformation diagram of rolling process: During the rolling process, the flow diagram of the metal in the deformation zone in the height direction, width direction and rolling direction. The flow of de...
Deformation characteristics of ordinary spinning
The deformation characteristic of ordinary spinning is that the metallic cementation slab mainly shrinks or expands in diameter during deformation. The diameter shrinkage is reduced diameter spinning,...
What are the standards and calculation methods for colored stainless steel plates?
Colored stainless steel plates are used more and more widely due to their uniqueness. Nowadays, many foreign countries and regions use a large number of colored stainless steel products for decoration...
Stripping and re-plating of cadmium plating
(1) Steel, copper and copper alloy plated parts: Dissolve and peel off the cadmium coating with the solution 1. Dilute hydrochloric acid. 2. 100g/l ammonium nitrate. 3. Waste chromic acid solution. (2...
Hydrogen corrosion
In the environment of high temperature (usually high pressure) hydrogen and ammonia, localized metal etching copper corrosion is caused by hydrogen entering the material. The mechanism is that carbon ...
nozzle clogging
During the pouring process, the nozzle of the intermediate tank or the submerged nozzle may become clogged due to nodulation, with mild cases requiring oxygen burning and severe cases causing interrup...
What are the characteristics of billet heating in high-line rolling mills?
Because the high-line steel billet is a small billet with a small cross-section, generally 120mm×120mm~150mm×150mm; the length of the billet is 9~16m. The main characteristics of its heating are: shor...
Multi-axis linkage CNC machining programming skills for large mixed-flow blades
I. Introduction The hydraulic turbine is the prime mover of hydropower generation. The quality of the turbine runner blades has a huge impact on the safety, reliability, and economical operation of th...
The impact of uneven cooling on products after wire rod rolling
(1) The metallographic structure is not ideal. The main reason is that the grains are coarse and uneven. Due to the appearance of a large amount of hypereutectoid structure, the free ferrite in hypoeu...
Tips and ways to improve the reliability of magnetic pumps
1. Foreword Our company’s new product 40,000 tons/year chloride equipment has been officially put into use. During the equipment selection period of the project, we conducted extensive research, adher...
Introduction to stainless steel
Stainless steel is generally the general term for stainless steel and acid-resistant steel. 304 stainless steel toy conical compression spring refers to steel that is resistant to corrosion by weak me...
work index
It is an indicator indicating the difficulty of material crushing or grinding in mineral processing. The initial concept is the unit work consumed when crushing materials of unlimited particle size to...
hot extrusion
Extrusion is performed by heating the ingot to an appropriate temperature above the recrystallization temperature. During hot extrusion, the metal undergoes full recrystallization to eliminate interna...
Experience in using steam double-effect lithium bromide absorption refrigerator
Abstract: This article summarizes the experience in the operation and maintenance of lithium chemical refrigerators, and proposes a full-process management plan and matters that need to be paid attent...
What is the precision alloy grade (GB/T15018-1994)?
(1)How to indicate the brand number (1) Precision alloy grades are represented by a combination of Arabic numerals and Chinese pinyin letters. (2) The type of precision alloy is represented by the let...
The principle of pickling steel billet
There are iron oxide scales of different thicknesses on the surface of hot-rolled cnc machining stainless-steel billets. All surface defects of the steel billets cannot be exposed, which affects the c...
DLP Law
The DLP method (direct lead patenting process) is a controlled cooling process in which the wire rod is treated with two salt baths after hot rolling, referred to as the two-salt bath method. It was d...
Control form of pneumatic valve actuator
As there are more and more control methods and means, there are many methods used to control pneumatic actuators in actual industrial daily life and industrial control. The following are commonly used...
Iron ore sulfur removal process process flow
Most of the iron ores in Xinjiang, Anhui, Hubei, Jiangsu and other places in my country contain pyrrhotite to varying degrees; in addition, some of the iron ores imported into my country from abroad a...
The reason why the pinch roller adopts the tail speed reduction control function
For small-sized high-speed wire rod rolling, when the exit speed of the finished product is greater than about 70m/s, the moment the tail of the rolled piece leaves the reducing and sizing machine (ex...
Techniques for indicating steel number in my country
1. Overview of the representation method of steel grades in my country The grade of steel, referred to as steel grade, is the name given to each specific steel product and is a common language for peo...