electroleaching
The leaching method uses the anode reaction of the electrolytic cell to dissolve the valuable metals in the material into the solution. Also called electrochemical leaching. The material (graphite pow...
Self-differential pressure control valve is used in HVAC engineering
Abstract: The working principle of the self-operated self-pressure differential control valve is introduced, and the application of the valve in cold and heat source protection and central heating pro...
Mold materials and mold thermal operation methods
Mold material selection is a very important link in the entire mold making process. Mold material selection needs to meet three principles. The mold should meet work requirements such as wear resistan...
Introduction to the concept of pipe jacking project for fiberglass reinforced plastic sand-filled pipes
A main traffic artery with a road width of 60 m and a large traffic volume, it is one of the important transportation hubs in Shenyang City. With the development of social economy, the original sewage...
Attention to organizational control of steel bar rolling
Due to the deformation and temperature characteristics of the steel bar rolling process, it is difficult to control the structure. Controlled rolling can only be achieved by controlling the temperatur...
Analysis of the Mechanism of Shaft Voltage and Shaft Current Generation in Variable Frequency Motors
1 Introduction When the motor is driven by a sine wave power source, the shaft voltage is generated through the alternating magnetic flux of the motor shaft. These magnetic links are caused by factors...
Mechanism of Lubrication in Hot Rolling Process
The main purpose of lubrication in hot rolling process is to reduce roller wear, reduce rolling force, and improve product quality. So far, the research on lubrication technology for hot rolling proce...
1-21121 Operating Regulations for Initial Rolling Machine
Productivity: 50-60 m3/hour 1. Comply with the General Operating Regulations for Foundry Equipment. 2. Check the wear of each scraper, and if the wear is severe, the scraper must be replaced. 3. Befor...
Adding ladle slag modifier to the ladle during the tapping process
Although slag blocking measures are taken during tapping, it is difficult to completely block the high oxidizing final slag. Therefore, while improving slag blocking efficiency, ladle slag modifiers s...
Application and Maintenance of Hydraulic Plunger Pump in Construction Machinery
The efficiency of the hydraulic system of construction machinery mainly depends on the volumetric efficiency of the hydraulic pump. When the volumetric efficiency drops to 72%, routine maintenance is ...
Selection and Engineering Assumption of Air Cooled Heat Pump Cold and Hot Water Units
The air-cooled heat pump cold and hot water unit is a new type of air conditioning unit that began to be applied in China in the 1990s. This type of unit can provide both cooling and heating, eliminat...
Precautions for distinguishing and preventing steel business risks
The operation of steel products involves large-scale and large-scale business operations, with high risk characteristics. In large-scale and large-scale business operations, it is of great significanc...
dry cooling
The so-called “dry” cooling refers to the secondary cooling zone that does not spray water and relies entirely on the radiation of the stand casting billet and the indirect cooling method ...
Mechanism and electrochemical experimental results of bacterial oxidation leaching of gold arsenic containing pyrite
1、 Preface With the increasingly serious global ecological problems, the drying up of easily selected and easily treated gold ore resources, and the advancement of metallurgical skills, metallurgical ...
General technology of automatic spray control valve applied to hydraulic support
MT/T765-1997 Approved by the Ministry of Coal Industry of the People’s Republic of China on December 30th, 1997 Implemented on June 1st, 1998 1 Scope This standard specifies the requirements, te...
Various methods for judging tension
(1) Current judgment method. By using the fluctuation of the current index corresponding to each frame during investment casting steel biting, it is determined whether there is tension or thrust betwe...
Selection of Die Forging Hammer and Hot Die Forging Parting Line (Face)
Steel (carbon steel and alloy steel) die forgings (hereinafter referred to as die steel parts) with a weight of no more than 250kg and a length of no more than 2500mm produced in batches on die forgin...
Precautions for liquid level control of crystallizers
Maintaining a stable liquid level in the mold is one of the keys to reducing stainless steel leakage and achieving good surface quality of the billet. If the liquid level fluctuates by more than 10mm ...
Scope of use of soft polyvinyl chloride pipes
1. Theme and Scope of Application This standard specifies the classification, technical requirements, test methods, inspection rules and markings, packaging, transportation, and storage of flexible po...
Technical specification for building drainage hard polyvinyl chloride pipeline engineering (1)
1 General 1.0.1 In order to achieve advanced technology, economic rationality, safety and applicability, and ensure quality in the design, construction, and acceptance of building drainage hard polyvi...
Hunter casting and rolling method
A continuous casting and rolling method for non-ferrous metal alloys. The process of rolling molten metal into thin slabs through the gaps of a pair of horizontally arranged rollers. This method was j...
Treatment of explosive splashing during smelting
Explosive splashing occurs during smelting, usually due to low process temperature, delayed C-O reaction, and slag Σ FeO content of over 20% can cause explosive splashing. Furthermore, when operating ...
The structure and function of the main reducer
Because the speed of the main motor is generally higher than the required roller speed, a reducer must be installed in the main train of the rolling mill. The function of the reducer is to change the ...
Application of Dual Valve Core Control in Hydraulic Multi way Directional Valve
The control of the inlet and outlet of traditional directional valves is carried out through a single valve core. The corresponding relationship between the two oil ports has been determined during th...
Advantages of magnesium injection desulfurization in molten iron compared to other desulfurization processes
Compared with other desulfurization 9517 coil comb aluminum alloy custom machining, the magnesium spray desulfurization process for molten iron has the following significant advantages: (1) High desul...
Magnetization roasting experiment of a certain oolitic high phosphorus hematite and limonite in a rotary kiln
The steel industry is one of the pillar industries of the national economy, especially in China’s high-speed development of the national economy. There are two ways to solve the shortage of iron...
Principle and Method of Sulfur Stamp Inspection for Continuous Casting Billets
Sulfur printing is a method of displaying sulfur segregation on a sample using photographic paper. The principle is that sulfuric acid on the paper reacts with sulfides (FeS, MnS) on the sample to gen...
On the selection of pumps for sewage pumping stations
1、 Preface Shanghai is a bustling modern city with the goal of becoming an international economic, financial, and trade center. This requires the city to have abundant water resources and a superior w...
Practice of Improving the Grade of Iron Concentrate
The ore processed by Shandong Jinling Iron Mine (referred to as Jinling Iron Mine) is a high-temperature hydrothermal contact metasomatic skarn type polymetallic magnetite. The ore type is mainly magn...
Overview of Anshan Alloy Pipe Factory
Large steel complex. Located in Anshan City, Liaoning Province, China. Its predecessor was South Manchuria Railway Co., Ltd., which began construction in 1916. After Japan surrendered, most of the equ...
Commonly used materials for cross rolling rolls
Due to the prominent edges and corners of the oblique rolling roller, the unit pressure and speed difference during rolling are large, so the roller material is required to be wear-resistant under hig...
Slow type Steyr controlled cooling
What is slow type Steyr controlled cooling and what are the suitable steel grades? Slow type Steyr controlled cooling is designed to meet low-speed requirements such as cnc machining carbon fiber ste...
Materials and Applications of ABS Alloy Pipes
ABS alloy pipe is a plastic alloy with higher strength, excellent performance, better toughness, and better weather resistance obtained by blending and modifying ABS resin with other plastics and addi...
Lagrangian stress tensor
The asymmetric stress tensor described by the initial configuration (see elastic-plastic finite element method) when studying large deformations. Before solving deformation mechanics problems, it is n...
Requirements for raw materials in steel rolling production
The correct selection of the type, cross-sectional shape, size, and weight of the billet is of great significance for steel rolling production facilities. Reasonable selection of billets not only impr...
CNC machine tools and correct selection
The selection of CNC cutting tools and the determination of cutting parameters are important contents in CNC machining technology. They not only affect the machining efficiency of CNC machine tools, b...