Annual Meeting Preliminary Program - Full Brochure (PDF) - SME

TECHNICAL PROGRAM
technology that became Peirce-Smith. Baggaley in a book defending one of his
patents in 1903 reviewed this period covering literature, visits to facilities, and discussions
with developers, providing unique insight into how the innovation
process should proceed. Today many problems occur because prior failures are
little known or published, and few make a thorough, critical, skeptical and objective
review of their own efforts. To not learn from past mistakes or improve upon
prior art invites wasted effort and certain failure.
2:25 PM
Extractive Metallurgy of Rhenium: A Review
C. Anderson, P. Taylor and C. Anderson; Kroll Institute for Extractive
Metallurgy, Colorado School of Mines, Golden, CO
A variety of processing technologies exist for both primary and secondary
sources of rhenium. Currently, there are no known primary rhenium deposits,
thus, the method in which primary rhenium is produced is dependent on the industry
of which it is a byproduct, i.e. copper or molybdenum. In addition, focus
on the recovery of rhenium from secondary sources, such as alloy scraps and catalysts,
is continually growing. This paper presents a review of both primary and
secondary processing technologies for the recovery of rhenium.
2:45 PM
Sulfide Capacities of Blast Furnace Slags
R. Reddy and A. Yahya; Metallurgical and Materials Engineering,
The University of Alabama, Tuscaloosa, AL
The sulfide capacities of blast furnace slags using the Reddy-Blander (RB) model
were calculated. The sulfide capacities of acidic and basic melts of the binary and
multicomponent aluminates slag systems were predicted a-priori for a wide range
of slag compositions and temperatures. The calculated capacities for these slag
systems in equilibrium with iron are in good agreement with the reported experimental
data. Such predictions are useful for understanding the behavior of impurities
in the current and eventually future iron making processes.
3:05 PM
Metallurgical Properties of the Extrusion Briquettes (BREX)
R. Steele and A. Bizhanov; Stiff Extrusions, J.C.Steele & Sons, Inc.,
Statesville, NC
Our recent investigations of the Stiff-extrusion agglomeration in metallurgy and
mining show clearly that this technology represents a prospective alternative to
the widely used briquetting technologies based on roller and vibro pressing facilities.
A set of lab-scale and full-scale industrial trials indicate that the stiff-extrusion
technology can be very efficient for the agglomeration of disperse anthropogenic
and natural metal containing and carbonaceous substances. This paper
contains the results of the investigation of the metallurgical properties of the
Extrusion briquettes (BREX). The results show that the metallurgical properties
of the BREX make them a very attractive and economically sound charge component
for the iron, steel and Ferro Alloys production.
3:25 PM
Mechanical Strength of the Extrusion Briquettes (BREX)
R. Steele and A. Bizhanov; Stiff Extrusions, J.C.Steele & Sons, Inc.,
Statesville, NC
Extrusion briquettes (BREX) exhibit a set of unique properties when comparing
with known alternative briquettes. Among them the sufficiently high integrity of
the brex right after the die which allows for their easy handling and stock-pilling.
Another feature is represented by the length of the freshly extruded cylindrical
agglomerates. Brex could be as long as up to 5-6 diameters and even longer. Stiffextrusion
allows also for the very easy changing of the cross-section shape of the
brex. The paper contains the results of the physical and mathematical simulations
(based on the finite elements simulation) of the length and shape influence
on the mechanical strength of the brex. We have also investigated the relations
between compressive and tensile splitting strength values of the brex, the mechanism
of the brex destruction.
3:45 PM
Reduction of Blast Furnace Grade Pellets in Midrex DR
Shaft Furnace
U. Srivastava and T. Battle; Research and Development, Midrex
Technologies, Pineville, NC
Iron oxide pellet specifications for direct reduction require a gangue content considerably
less than is acceptable for typical blast furnace pellets. This restriction is
not due to issues within the DR shaft furnace itself, but rather the needs of the
typical customer for the DRI product, the Electric Arc Furnace. If one of the
DRI products (cold DRI, hot DRI, or HBI) is intended, on the other hand, for a
blast furnace or basic oxygen furnace, these compositional restrictions are no
longer valid. In that case, lower-grade iron oxide pellets can be converted to DRI
or HBI at a lower cost, but still be of value to the customer. In this study, bench
scale reduction tests were conducted with blast furnace grade iron oxide pellets,
simulating the Midrex DR Shaft furnace process. The reduced pellets were
heated to 700∞C and hot DRI briquettes of compressive strength above 800daN
were produced. These briquettes were further tested for different physical and
chemical characteristics.
4:05 PM
Investigation of the Dust Generation Mechanism of Sintered
Magnetite Pellets by a Novel Dust Tower
O. Sivrikaya 1 and A. Arol 2 ; 1 Mining Engineering, Selcuk Univeristy,
Konya, Turkey and 2 Mining Engineering, Middle East Technical
University, Antara, Turkey
Iron ore pellets should have sufficient strengths against degradation. Beside the
strength, pellets should have less dust emission during operation since the efficiency
and equipment are adversely affected by dust. Sufficient strength and low
dust emission of pellets are necessary for better transportation, operation and
handling. Dust emission mechanism of sintered pellets produced with different
binders was comparatively studied. The results showed that the dust is not produced
due to the breakdown of sufficiently strong sintered pellets. One of the reasons
behind dust generation is the roughness of the pellet surfaces. The rough
surface generates dust under attrition and impact forces during transportation
and loading. The surface smoothness is more important since the pellets with
high strength and rough surfaces produced much dust than those of with smooth
surfaces and low strength. Half of the fines generated from the sintered pellets becomes
airborne and can be considered as loss and environmental problem. The
percentage of particulate matter (PM10) which is significant in health risk found
between 30% and 40% by weight of airborne dust of sintered pellets.
Mining & exploration:
Geology: Water Management in
exploration, Mining, and Milling Systems
2:00 PM • Wednesday, February 27
chair:
2:00 PM
Introductions
P. Dolph, Schlumberger Water Services, Denver, CO
2:05 PM
Water Balance for Pre-feasibility Evaluations
D. Hoekstra; Schlumberger Water Services, Denver, CO
This presentation describes the development and refinement of a site-wide water
balance model for a pre-feasibility study being performed for a gold-silver project
in Mexico. The project incorporates mine site disposal of dewatered tailings and
off-site processing of sulfide concentrate. Water supply for mine operations presents
a significant challenge, and alternatives were developed that source water
from runoff stored in on-site water storage dams and/or purchased from a
nearby agricultural reservoir and piped to the mine-site. The water balance includes
all the major mine components and evaluates the performance of the entire
system, including quantifying the peak demands and makeup requirements,
determining seasonal availability of local water sources, and understanding the
utilization of the water storage facilities. The model allows the mine planners to
look at the complex interactions between the water use and water supply in the
project. As a result, it revealed supply/demand synergies where none had been
anticipated and has been able to eliminate or push back the construction of several
very large project components.
This is the Technical Program as of September 1, 2012. IT IS SUBJECT TO CHANGE.
116
Please see the Onsite Program for final details.