Abstract:This article takes the application of microalloyed steel organization performance control technology in a steel plant as an example,and analyzes mechanism of action,organization and performance whole process control technology of microalloyed steel.From seven core links of slab,heating,reduction,final rolling temperature,cooling rate,coiling temperature,and heat treatment,this paper tells in detail the key technology of microalloyed steel.

Abstract:To determine the determination of SiO2,CaO,MgO,S,P and other components in dolomite,the sample is automatically cooled into the sample box after the fourth set of national installation equipment-automatic weighing melting system,and then transferred to MXF-2400 type X-ray fluorescence spectrometer for determination.Through a variety of comparative tests,the measurement results of each group in the melt sheet method are accurate and reliable,and can be accepted.The sample was determined by X-ray fluorescence spectrometer splice method instead of powder tablet method and silicon molybdenum blu-ray method to determine SiO2 and EDTA volumetric method to determine CaO and MgO.Under the premise of maintaining the accuracy of the result,the detection time was greatly shortened compared with the traditional conventional detection method,and the stability was also significantly improved because the glass splice was used.Through the development of dolomite automatic weighing melting system detection method real-time determination,the ratio of materials in dolomite,the output of hot metal has a very important guiding significance,but also to avoid the traditional chemical determination of process produced acid and alkali waste liquid pollution to the surrounding environment.

Abstract:This article describes using the mix melting agent and the sample into fusion sample at high temperature,we analyzed the four components of SiO2,CaO,MgO and Al2O3 in the sample by XRF,and high accurate analytical results were obtained.The method was applied to routine analysis of the blast furnace slag sample,the effect was ideal.

Abstract:By changing the cooling method of intermediate treatment,the influence of different intermediate heat treatment processes on the structure and properties of a cast nickel-based superalloy was studied.The results show that the test rod is cooled by water,air and furnace after intermediate treatment at 1 050℃×14 h.The mechanical results show that the three cooling methods have little effect on the elongation and section shrinkage after fracture,and all are at a low level.However,the tensile strength and yield strength of the test rod are gradually increased.

Abstract:In response to the increasing number of leaks in the later life cycle stage of the Angang gas pipeline network and the lack of online detection and alarm systems,a gas safety monitoring system for the pipeline network has been developed and applied.Power supplies,fixed CO alarms,wireless transmission devices,and data reception and monitoring devices have been installed at 91 locations.Since the system was put into operation,the efficiency of discovering and handling gas hazards has been significantly improved,thereby ensuring public safety in the gas production area.

Abstract:In the field of precious metal mold processing,the traditional hand-made mold cannot meet the production needs,and the current three-dimensional scanning technology plays an increasingly important role in the design,production,repair and inspection of precious metal mold.In the processing and production of precious metal products,precision molds can improve the accuracy and quality of new products,improve product competitiveness and bring considerable economic benefits to enterprises.Through the introduction and application of high-precision 3D scanning equipment in the market,the production efficiency can be improved,the cost can be reduced,the mold production level can be improved,and the production cycle can be shortened.

Abstract:In view of the quality problems in the development process of 50Cr15MoV stainless steel for high-end cutting tools,the difficulties and cruxes of process control are found out,and improvement measures are made to optimize the process scheme,the problems of 50Cr15MoV rolling,such as delamination and carbide segregation,are solved by improving the composition of molten steel and temperature hit ratio of GOR furnace,optimizing the slab thickness,adopting dynamic soft reduction and improving rolling process The process of annealing and pickling was optimized to improve the properties and microstructure of steel strip and meet the requirements of customers.

Abstract:This article introduces the control methods for terminal sulfur in the smelting of non-oriented silicon steel in a 100 t converter,through the following measures:Before the converter starts to smelt silicon steel,the furnace is washed with low-sulfur molten iron and scrap steel for 3 to 5 furnaces until the terminal sulfur content is below 0.006%.The sulfur content of the low-sulfur scrap steel used is less than 0.010%,and the sulfur content of the lime is below 0.02%.The flow rate of a single bottom-blowing gun in the converter is not less than 600 L/min.Before the steel is discharged,a slag stopper is used for front slag blocking.The steel tapping time is more than 3.5 minutes within 100 batches.The above measures are systematically controlled to achieve the goal of sulfur control.

Abstract:This paper uses the finite element software and based on the general fatigue S-N curve of structural steel,simulates and studies the influence of various factors such as the length,width,and the presence or absence of internal inclusions of cracks on the fatigue of 45B pin shaft steel on different crack detection steps.The following conclusions are ultimately drawn:The detection standard of pin shaft billets using the acid immersion crack inspection result as the judgment basis is not scientific.The crack inspection should take the magnetic particle inspection result as the judgment basis;it is reasonable to use 1 mm as the starting length for crack length;when the crack width is less than 0.4 mm,its fatigue life remains basically unchanged;when the crack width is greater than 0.4 mm,the fatigue life of the crack gradually increases;for internal inclusion-type cracks,it can be considered that they have no effect on the fatigue life of the pin shaft;when the crack is greater than 4 mm,the fatigue life of the pin shaft basically approaches 0.The original standard using 5 mm length as the judgment basis is not appropriate.A unified judgment standard can set the crack limit length to 4 mm.

Abstract:This paper introduces the common technologies for wastewater treatment in the steel industry.In view of the characteristics of steel enterprises that consume a large amount of fresh water and generate a large amount of wastewater,it briefly analyzes the current situation and problems of wastewater treatment in steel enterprises.From the perspectives of water conservation ideas,wastewater treatment,water quality improvement,and technological innovation,it proposes suggestions for zero wastewater discharge improvement,thereby achieving energy conservation,environmental protection,cost reduction,and efficiency improvement.

Abstract:This article introduces the transformation of blast furnace material chute and the application of material matrix control technology in blast furnace production.By renovating the fabric chute with new wear-resistant materials and optimized structure,its service life and fabric accuracy have been significantly improved.Meanwhile,with the help of fabric matrix control technology,precise distribution of furnace materials has been achieved,improving gas utilization efficiency and reducing fuel consumption.By combining measures such as adjusting the air supply device and selecting the platform with funnel material matrix,the smelting situation of the blast furnace has been effectively improved,providing strong support for the efficient and stable operation of the blast furnace.

Abstract:Based on the production conditions of Shiheng Special Steel,and addressing the challenge of low cost control in double-chamber kilns,we analyzed the production characteristics and cost composition of double-chamber kilns.By deeply integrating digital intelligence technology with lean management concepts,we proposed corresponding cost control strategies,achieving a cost reduction of 12.65 Yuan/ton.

Abstract:Provide a detailed introduction to a method developed independently by Laigang for formulating burdening plan of equal SiO2 equal TFe.After writing this method into an automated program,it can quickly complete calculations and output results.The deviation of SiO2 and TFe values in each stage of the burdening plan can be controlled within 0.01%.

Abstract:Analyze the fracture delamination problem in the room-temperature transverse tensile test of 420 MPa grade low-alloy steel plates,paper adopts multi-dimensional technologies such as fracture morphology observation,non-metallic inclusion detection,metallographic structure analysis,scanning electron microscope(SEM)inspection,and energy dispersive spectroscopy(EDS)inspection to systematically explore the macro-morphology and microstructural characteristics of the samples,and clarify the causes of delamination and key influencing factors.The results show that the pearlite composition segregation and type A MnS strip inclusions in the core of the steel plate are the core causes of delamination.The composition segregation forms a mechanical weak zone in the core,and the MnS inclusions split the matrix and cause local stress concentration.Under the tensile load,cracks initiate and propagate in the stress concentration area,leading to delamination.The chemical composition and overall mechanical properties of all samples meet the GB/T 1591-2018 standard,and delamination is caused by local defects.In view of causes,measures such as improving purity of molten steel,optimizing continuous casting process with low superheat pouring,and adjusting controlled rolling and controlled cooling parameters are proposed,which can effectively reduce the occurrence rate of delamination defects.

Abstract:Based on the production conditions of Shiheng Special Steel,this study analyzes the influencing factors of using low calorific value gas for calcination in a double chamber vertical kiln,formulates reasonable calcination processes,improvement measures,and innovative technologies.And stable and smooth operation of the double chamber vertical kiln was achieved.Full production capacity and the desired results were reached.

Abstract:A pilot study on electrodialysis concentration of reverse osmosis concentrated water from Taishan Steel was carried out.The results show that electrodialysis(ED)has an ideal concentration effect on the concentrated brine of steel industry,and can achieve high concentration of the concentrated brine conductivity,the concentration multiple is 5～10 times,the fresh water conductivity of ED is less than 3 000 μs/cm.The concentration effect of ED on salt water was affected by different ions in water.The concentration effect of ED on COD is not obvious,and ED has a certain ability to resist organic pollution.During the test,the ED energy consumption was 2.3-2.4 kWh/t,and the concentrated water system recovery is more than 85％,which was conducive to realizing the reduction of concentrated brine with low energy consumption and high efficiency,and provided a feasible direction for further implementation of zero waste water discharge.

Abstract:Through the analysis of the measurement system across the entire process of coke thermal performance testing,it is identified that the control of coke sampling,the process of coke pelletizing,the particle size control of coke pellets,and the daily stability monitoring of coke testing equipment have significant impacts on the reproducibility of coke testing.It is necessary to strengthen the standardization of process operations to ensure that the quality of test results is under control.

Abstract:In this paper,the determination of reference materials in acetone by Gas chromatography was studied.The method was validated by changing the inlet temperature,the split ratio and the temperature-programmed conditions.It is confirmed that the method has a good precision and linearity with a small random error and a relative standard deviation of less than 2%,it can be used as the analysis method of homogeneity test and stability test for the reference material of herbicide solution in acetone.

Abstract:The 1#5 100 m3 blast furnace of Shandong Iron and Steel started operation in December 2017,and after the furnace started,it experienced a situation of"low production and high consumption".The blast furnace aims to increase production and reduce consumption.By adopting measures such as optimizing the loading system,improving the activity of the furnace cylinder,and increasing the stability of the molten iron[Si],the two streams of air in the blast furnace are smooth,the furnace shape is regular,and the blast furnace achieves efficient production with increased production and reduced consumption.Since the fourth quarter of 2023,the technical and economic indicators of the 1#5 100 m3 blast furnace have improved significantly.In December 2023,the average blast furnace air volume of 7 750 m3/min has reached the best level in history,and the utilization coefficient has been increased from 1.90 t/(m3·d)to 2.22 t/(m3·d).The coke ratio was decreased to 345 kg/t from 371.5 kg/t in the first half of the year.

Abstract:The EPK series electric CNC screw press is an advanced mechanical equipment,but its dynamic characteristics and accuracy are significantly affected by the clearance of the kinematic pair.A kinematic pair is a mechanism in a mechanical system that allows two or more components to move relative to each other.The gap will cause mechanical vibration and reduced accuracy.Based on advanced finite element analysis and multi-body system dynamics software,this paper studies the impact of the kinematic pair clearance on mechanical dynamic performance in the EPK series electric CNC screw press.Research results show that the size of the kinematic gap directly affects the mechanical motion accuracy and the natural frequency of the system,which in turn affects the dynamic response and processing accuracy of the entire machine.