scholarly journals Optimization of the Stainless Steel Dust Briquette Reduction Process for Iron, Chromium, and Nickel Recovery

2018 ◽  
Vol 37 (8) ◽  
pp. 785-791
Author(s):  
Huining Zhang ◽  
Li Hui ◽  
Jianhong Dong ◽  
Huihui Xiong
Keyword(s):  
Stainless Steel ◽  
Recovery Rate ◽  
Reduction Process ◽  
Processing Parameters ◽  
Nickel Recovery ◽  
Optimum Parameters ◽  
Metals Recovery ◽  
Novel Method ◽  
Steel Dust ◽  
Iron Chromium

AbstractThe recovery of iron, chromium, and nickel from stainless steel dust (SSD) has attracted considerable attention for their utilization as secondary resources in the ever-growing field of steelmaking. This paper investigates the reduction process of SSD briquettes in iron-baths in detail in order to determine the optimum processing parameters. A novel method of analysis by studying the erosion behavior of a corundum crucible was adopted to accurately calculate the recovery rate of the metals, and the effect of the parameters on the triple metals recovery rate was determined by orthogonal testing. The results show that the most important factor for the SSD briquetting process is water, followed by sucrose, carbon, and pressure. The optimum parameters of the SSD briquetting process are 13 wt% sucrose, 13 wt% water, 11 wt% carbon, and 30 MPa pressure. The compressive intensity was found to be 27.6 MPa. When a basicity of 1.6, 17% carbon, 5 wt% ferrosilicon, and 6% CaF2 were used in the SSD briquette reduction process, the triple metal recovery rate was in the range of 94 –100 %, 90 –100 %, and almost 100 %, respectively.

Cr and Ni Recovery and Oxidational Dephosphorization of Stainless Steel Dust during the Iron-Bath Smelting Reduction Process

2014 ◽  
Vol 933 ◽  
pp. 32-37
Author(s):  
Shuai Niu ◽  
Yong Ren ◽  
Hua Zhang ◽  
Hui Long Fu ◽  
Xin Hong
Keyword(s):  
Stainless Steel ◽  
Phosphorus Content ◽  
Reduction Process ◽  
Hot Metal ◽  
Smelting Reduction ◽  
Yield Rate ◽  
Steel Dust ◽  
Iron Bath ◽  
The Cost ◽  
Dephosphorization Rate

According to the comprehensive utilization of 300 series and 400 series stainless steel dust (SSD), and the dephosphorization of the reclaimed Cr-Ni contained hot metal, an experimental method of smelting reduction in iron-bath and oxidational dephosphorization was studied. The result shows: The yield rate of Cr in 300SSDand 400SSDis 98.13% and 98.39% respectively, the yield rate of Ni is almost 100%; During the dephosphorization, through the BaO and CaO-BaO based dephosphorizer has a higher Dephosphorization rate, it can bring pollution problems and the cost is too high, however, under some circumstance when the requirement of phosphorus content is not critical, the CaO based dephosphorizer can also achieved the dephosphorization goal.

scholarly journals Defect Analysis of 316 L Stainless Steel Prepared by LPBF Additive Manufacturing Processes

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1562
Author(s):  
Zhijun Zheng ◽  
Le Peng ◽  
Di Wang
Keyword(s):  
Stainless Steel ◽  
Energy Density ◽  
Orthogonal Experiment ◽  
Scanning Speed ◽  
Processing Parameters ◽  
Powder Bed ◽  
X Ray ◽  
Optimum Parameters ◽  
316 L Stainless Steel ◽  
X Ray Computed

The 316 L stainless-steel samples were prepared by laser powder bed fusion (LPBF). The effects of processing parameters on the density and defects of 316 L stainless steel were studied through an orthogonal experiment. The density of the samples was measured by the Archimedes method, optical microscopy (OM) and X-ray Computed Tomography (XCT). The microstructures and defects under different LPBF parameters were studied by OM and SEM. The results show that the energy density has a significant effect on the defect and density of the structure. When the energy density is lower than 35.19 J/mm3, the density increases significantly with the increase of energy density. However, when the energy density is larger than this value, the density remains relatively stable. The process parameter with the greatest influence on energy density is the hatch distance D, followed by laser power P, scanning speed V and rotation angle θ. In this paper, the optimum parameters consist of P = 260 W, V = 1700 mm, D = 0.05 mm and θ = 67°, in which the density is as high as 98.5%. In addition, the possibility and accuracy of the XCT method in detecting the discontinuity and porosity of 316 L stainless steel were discussed. The results show that XCT can provide the whole size and variation trend of pores in the different producing direction of LPBF.

ACI TYPE CF-20

Alloy Digest ◽  
1976 ◽  
Vol 25 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Nickel Alloy ◽  
Heat Treating ◽  
Iron Chromium

Abstract Type CF-20 is an austenitic iron-chromium-nickel alloy that serves satisfactorily in many types of oxidizing corrosion service where its superior ductility and toughness make it more useful that the ferritic iron-chromium ACI Type CB-30. Its many uses include the architectural, food and chemical industries. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-323. Producer or source: Stainless steel foundries.

ACI TYPE CB-30

Alloy Digest ◽  
1975 ◽  
Vol 24 (8) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Nitric Acid ◽  
Chromium Content ◽  
Heat Treating ◽  
Alkaline Solutions ◽  
Chromium Alloy ◽  
Iron Chromium Alloy ◽  
Iron Chromium

Abstract Type CB-30 is an iron-chromium alloy sufficiently high in chromium content to provide excellent resistance to corrosion by nitric acid, alkaline solutions and many organic chemicals. They alloy maintains an essentially ferritic structure. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-315. Producer or source: Stainless steel foundries.

ACI TYPE HP

Alloy Digest ◽  
1975 ◽  
Vol 24 (3) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Sigma Phase ◽  
Heat Treating ◽  
Steel Mill ◽  
Temperature Performance ◽  
Formation Type ◽  
Rupture Properties ◽  
Roll Service ◽  
Iron Chromium

Abstract Type HP is an iron-chromium-nickel alloy with a combination of elements that makes it resistant to both oxidizing and carburizing atmospheres at high temperatures. The alloy has good creep-rupture properties in the 1800-2000 F temperature range. It has an austenitic structure at all temperatures, thus it is not susceptible to embrittlement from sigma phase formation. Type HP was developed for rugged steel-mill furnace-roll service; no comparable wrought alloy exists. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-307. Producer or source: Stainless steel foundries.

ACI TYPE HN

Alloy Digest ◽  
1982 ◽  
Vol 31 (6) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Steel Casting ◽  
Nickel Content ◽  
Heat Treating ◽  
High Temperature Corrosion ◽  
Temperature Performance ◽  
Wide Range ◽  
Iron Chromium

Abstract Type HN is an iron-chromium-nickel alloy containing sufficient chromium for good high-temperature corrosion resistance and with nickel content in excess of the chromium. This alloy has properties somewhat similar to the more widely used ACI Type HT alloy but with better ductility. Type HN is used for highly stressed components in the 1800-2000 F temperature range. It is used in the aircraft, automotive, petroleum, petrochemical and power industries for a wide range of components and parts. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-410. Producer or source: Various stainless steel casting companies.

A novel method for the evaluation of the contamination dispersing ability of lubricants (CONTA-DISP)

2021 ◽  
Vol 68 (3-4) ◽  
pp. 22-28
Author(s):  
Bettina Ronai ◽  
Rainer Franz ◽  
Marcella Frauscher
Keyword(s):  
Lubricating Oils ◽  
Practical Procedure ◽  
Particulate Contamination ◽  
Optimum Parameters ◽  
Analysis Methods ◽  
Lubricant Analysis ◽  
Novel Method ◽  
Dispersing Ability

Water and solid particulate contamination are the two most common contaminants of lubricated systems and may be highly problematic for these systems. To reduce downtime and prevent failure, lubricant formulations contain detergent and dispersant additives that play an important role in terms of contamination tolerance. In lack of a practical procedure for the determination of the relevant properties, a novel method for the evaluation of the dispersing ability of lubricating oils is introduced. Following and combining established lubricant analysis methods, a procedure with optimum parameters was found. An assessment of the method using fresh and artificially altered lubricating oils allowed a differentiation concerning their dispersing ability.

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