Cold Strength and High Temperature Behaviors of Self-Reducing Briquette Containing Electric Arc Furnace Dust and Anthracite

Wu, Shengli; Chang, Feng; Zhang, Jianliang; Lu, Haifei; Kou, Mingyin

doi:10.2355/isijinternational.isijint-2017-013

Cited by 18 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Briquetting is an important process that is used to recycle and utilize the fine particles of steel plants as a product that provides suitable feed for metallurgical furnaces [ 1 , 2 , 3 , 4 , 5 , 6 ]. The briquetting process avoids heating up, softening, and melting the fine particles, which can save a lot of fossil energy and decrease the environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

“…In the previous works, many types of binders have been used for different raw materials, and each binder has different effects on the quality of the CBB. Various investigations [ 6 , 8 , 10 , 11 , 12 , 13 ] have studied the strength of the briquette and bonding mechanism with the binder. Unfortunately, due to commercial competition, the physical and chemical properties of commercial binder are vague.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study of an Organic Binder of Cold-Bonded Briquettes with Two Different Iron Bearing Materials

Chen

Hammam

et al. 2021

Materials

View full text Add to dashboard Cite

The aim of this study was to investigate the properties of an organic binder used in cold-bonded briquettes (CBBs) prepared from two different iron bearing materials. The applied binder is a type of starch as indicated by chemical analysis, iodine-starch staining and Fourier transform infrared analyses. Thermogravimetric differential scanning calorimetry showed that the binder pyrolysis undergoes four stages: moisture desorption, ash volatilization, pyrolysis of organic matter and decomposition of materials with high activation energy. The difference between the dry and heat-treated samples during the macroscopic failure process is the instability propagation of the crack. The CBB shows a low decrepitation index at 700 °C. The returned fines of CBBs used with the organic binder were applied in two blast furnaces. The industrial trials showed that the CBBs do not influence the performance of the blast furnace and can reduce the fuel consumption rate. The curing rate of the binder decreases, and the growth rate of compressive strength decreases during the curing process. Iron ore particles are bonded together and exist in the form of aggregation after mixing with water and binder. The edges and corners of the particles become blurred, and the original surfaces of the particles are covered with binder film, the surface of which is covered with fine particles. The multi-branched structure of amylopectin provides omnibearing adhesion sites, thus forming binder agglomeration and film leading to a strong adhesion between binder and iron ore particles. Binder film and binder agglomeration work together to make the CBB perform well.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of an Organic Binder of Cold-Bonded Briquettes with Two Different Iron Bearing Materials

Chen

Hammam

et al. 2021

Materials

View full text Add to dashboard Cite

show abstract

“…The dust and mud produced during the iron-making and steel-making production processes contain a large amount of zinc. 30,31) When these two components are mixed together in the sintering process an increase in the zinc load of the BF has to be expected. Therefore, techniques which make use of dust and mud containing iron, such as rotary kiln, rotary hearth furnace, shaft furnace, gravity separation, magnetic separation, and flotation, improve the utilization rate of these compounds and reduce the zinc load of the BF.…”

Section: Comprehensive Utilizationmentioning

confidence: 99%

Erosion of Carbon Brick by Zinc in Hearth of Blast Furnace

et al. 2020

Self Cite

View full text Add to dashboard Cite

The service life of a blast furnace (BF) is affected by the accumulation of zinc. To clarify the erosion mechanism of the carbon bricks, due to the zinc action, a dissection investigation of a commercial BF was carried out. The results show that the zinc content reaches up to 10.59% in the tuyere coke. The carbon bricks were sampled in a region characterized by high erosion levels and molten iron was detected. More interestingly, zinc was detected between the molten iron and the carbon bricks: the high zinc content of the bosh gas of the BF induces the zinc vapor to penetrate into the molten iron surface. The zinc vapor and the molten iron mix together, and zinc migrates from the molten iron into the carbon bricks. The thermodynamic behavior of zinc was analyzed and the volume expansion rate (56.94%) was calculated when Zn oxidizes into ZnO. The oxidation process may be the main reason behind the carbon brick erosion. The results show that molten zinc flows to the brittle layer of the carbon bricks, and finally solidifies, the carbon bricks become easy to break at the brittle layer. Countermeasures to reduce the harm of zinc have been suggested based on the zinc balance calculation.

show abstract

“…The hydrometallurgical method using alkali or acid has attracted significant attention over the last decade. In particular, the acid-based wet process affords a high Zn recovery rate by using high temperatures, pressures, or acid concentrations, and has lower operating costs than the alkali wet process [1][2][3][4]. High Zn recoveries of 92% [7] and > 97% [8] have been achieved using various acid leaching processes.…”

Section: Introductionmentioning

confidence: 99%

Toward high recovery and selective leaching of zinc from electric arc furnace dust with different physicochemical properties

Lee

Park

Hwang

et al. 2019

Environmental Engineering Research

View full text Add to dashboard Cite

This work describes highly efficient recovery and selective leaching of Zn from electric arc furnace dust (EAFD) with different physicochemical properties, induced by acid leaching at ambient conditions. The chemical compositions, mineralogical phases, and particle sizes of the EAFDs were analyzed and compared. The effects of leaching time, liquid/solid ratio, acid type, and acid concentration on the selective leaching of Zn were also studied. The EAFD with high Fe/Zn ratio (>1, EAFD 3) was richer in ZnFe 2 O 4 and exhibited larger particle size than samples with low Fe/Zn ratio (<1, EAFD 1,2). ANOVA analysis revealed that the Fe/Zn ratios of the EAFDs also have a significant effect on Zn extraction (p <0.005). Selective leaching of Zn with minimum Fe dissolution was obtained at pH >4.5, regardless of other parameters or sample properties. The maximum Zn extraction rate obtained by the pH control was over 97% for EAFD 1 and EAFD 2 , 76% for EAFD 3 , and 80% for EAFD 4. The present results confirm that the Fe/Zn ratio can be used to identify EAFDs that permits facile and high-yield Zn recovery, and pH can be used as a process control factor for selective leaching of Zn regardless of any differences in the properties of the EAFD sample.

show abstract

Cold Strength and High Temperature Behaviors of Self-Reducing Briquette Containing Electric Arc Furnace Dust and Anthracite

Cited by 18 publications

References 23 publications

Study of an Organic Binder of Cold-Bonded Briquettes with Two Different Iron Bearing Materials

Study of an Organic Binder of Cold-Bonded Briquettes with Two Different Iron Bearing Materials

Erosion of Carbon Brick by Zinc in Hearth of Blast Furnace

Toward high recovery and selective leaching of zinc from electric arc furnace dust with different physicochemical properties

Contact Info

Product

Resources

About