• Resources Recycling
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• v.4 no.1
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• pp.60-68
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• 1995

Iron-bearing dust which stems from steelworks were pelletized and bonded with portland cement in order to attempt to use for blast iurnace burdens. The characterist~cs of cold bonded dust pellet were investigated. It was found that the compression strength of cold bonded pellet contaning portland cement of 10 wt.% reached above 150kg/p by proper curing treatment. Direcl contad of carbon with iron oxides seems to greately enhance a reduction reaction and herewxth increased chances to lorn pores at high temperature environment. Tumbler strength, RDI, and swelling of cold bonded pellet were similiar to and/or better than those of iron ore sinter and fired pellet.

• Resources Recycling
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• v.8 no.1
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• pp.29-36
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• 1999

Utilization of iron bearing dusts has been needed agglomeration prior to use as a burden in blast furnace The cold bonded pellet process using iron bearing dusts has been developed as an alternative to the conventional heat indurated pelletizing process. Partial substitution of cements with cheaper materials would decrease the production cost of pellet. This paper discusses the strength of pellet containing blast furnace slag as a bonding material in pelletizing a cold bonded agglomerates. Depending upon the quality, half of the cement required may be replaced by slag in the pellets with a strength of around 150 kgf. Some of the physicochemical properties of the bonding materials are also investigated in the present work.

• Resources Recycling
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• v.8 no.4
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• pp.30-38
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• 1999

High 1emperiltur.e propeitles o i cold bonded pellet based on lroll beanng dusts wele invesligaled prim to using as a burden m blasl furnaces, Major conclusions ould be summarized Io llows: the cold bonded pellet needed to bc produced by the characteristic criterion on high lempemhIre prapcrttes as well as a compressive sncnglh. Basicity of cold bonded pellel shruld be linted to be appoxiiniltely 1.7 in order to maintain appropriate softcn~nga nd rnelt~ngp ropcrlies. On thc other hand. basiciq greater than 2.6 showed exce\ulcornersive puessure drop due to powder gelleratlon. Potcntialil], of blast fi~rnaccs lag as binding malerial in m a h g cold ba~~deprel llels !\.us also certified in viewpoinls of high temperature properly.

• Proceedings of the IEEK Conference
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• 2001.10a
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• pp.370-374
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• 2001

The degree of iron recovery from dust agglomerates was investigated experimentally to determine the optimum mixing ratio of coke in cold bonded pellet(CBP) which is fed into electric arc furnace(EAE) in the minimill plant. From the XRD analysis for EAF dust, magnetite(Fe$_3$O$_4$) and franklinite(ZnFe$_2$O$_4$) was identified as major components. Maximum iron recovery was obtained for the solid carbon content of approximately 18 weight percent. From plant trials of CBP composed of this optimal mixing condition, it was observed that electric power consumption and sulfur content increased with increasing the quantity of CBP.

• Proceedings of the Korean Institute of Resources Recycling Conference
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• 1996.04a
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• pp.11-43
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• 1996

• Advances in concrete construction
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• v.9 no.2
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• pp.183-193
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• 2020

The present investigation is to identify an optimum mix combination amongst 28 different types of artificial lightweight aggregates by pelletization method with aggregate properties. Artificial aggregates with different combinations were manufactured from fly ash, cement, hydrated lime, ground granulated blast furnace slag (GGBFS), silica fume, metakaolin, sodium bentonite and calcium bentonite, at a standard 17 minutes pelletization time, with 28% of water content on a weight basis. Further, the artificial aggregates were air-dried for 24 hours, followed by hardening through the cold-bonding (water curing) process for 28 days and then testing with different physical and mechanical properties. The results found the lowest impact strength value of 16.5% with a cement-hydrated lime (FCH) mix combination. Moreover, the lowest water absorption of 16.5% and highest individual pellet crushing strength of 36.7 MPa for 12 mm aggregate with a hydrated lime-GGBFS (FHG) mix combination. The results, attained from different binder materials, could be helpful for manufacturing high strength artificial aggregates.

• Proceedings of the IEEK Conference
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• 2001.10a
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• pp.398-403
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• 2001

There is a potential usability of electric arc furnace(EAF) dust produced during the iron manufacturing process as a recycled resource, because valuable materials such as Zn, Pb and Fe are contained in it. In this study, metallic Zn was recycled from the fine electric arc furnace dust by a solid state reduction method using carbon at relatively low temperature. It was possible to recover metallic zinc by using of high vapour pressure of zinc with this reduction method. The feasibility of recycled zinc for cold bonded pellet(CBP) was investigated. The main composition of EAF dust were franklinite(ZnFe$_2$O$_4$), magnetite(Fe$_3$O$_4$) and zincite(ZnO), and Pb and Cl were completely removed by a heat treatment in oxidation environment. The reduction ratio increased as the solid carbon content increased, and it increased with decreasing of dust particle size and increasing of compaction pressure due to a increase of contact area.