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Monday, August 01, 2022 4:31:41 PM
https://www.ispatguru.com/dolomite-its-processing-and-application-in-iron-and-steel-industry/
Fig 1 Uses and form of dolomite in iron and steel industry
Processing of dolomite
Dolomite after its mining has to undergo several processing before it can be used in various processes. The basic processes in the production of dolomite are (i) quarrying of raw dolomite, (ii) preparing mined dolomite for its use by crushing and sizing, (iii) calcining of raw dolomite, (iv) processing the calcined dolomite further by hydrating to produce hydrated dolomite if required for use, (v) sintering of dolomite for its use as refractory material, and (vi) miscellaneous transfer, storage, and handling operations. All these processes may not be necessary to be present in every plant....
Several different types of kilns are used for the calcination process. These kilns can be rotary kilns or shaft kilns. The type of the kiln to be selected strongly depend on the characteristics of the raw dolomite, anticipated production rate, cost of fuel, investment costs, available fuel, local conditions, infrastructure and other things. In general, all data including laboratory tests are to be evaluated prior to selecting the calcining kiln....
During the REPLAY: NioCorp Live Investor Update Webcast of May 25, 2022
https://www.niocorp.com/replay-niocorp-live-investor-update-webcast-of-may-25-2022/
Scott states the Simplified Flowsheet - (Roasting ore under low temp.) the process utilizes ammonium carbonate/carbonic acid/supercritical CO2 removing the calcium & magnesium from the ORE "PRIOR" to SX. Turning the Ca & Mg into MgCO3- magnesium carbonate & CaCO3 Calcium Carbonates & an Fe product.? (Utilized in CEMENT, STEEL, FERTILIZERS & a host of other end products...)
CO2 Sequestration by Mineral Carbonation: A Review
https://www.researchgate.net/publication/331045327_CO2_Sequestration_by_Mineral_Carbonation_A_Review
Sharing a response from Jim some may find interesting:
6/29/2022 Jim-
Question:
Could the Elk Creek mine "Separation Process" now under development be utilized as a method for "In situ carbon mineralization/carbon capture"?
Not ‘in situ,’ as that implies injecting chemicals underground to perform the desired reaction. The carbonization process we are testing may result in some carbon sequestration, depending upon whether and how we end up making more byproducts from the magnesium and calcium we remove from the ore. That is all still TBD.
Waiting for team Niocorp & L3 to complete & prove final separation of REE's (oxides), upgrade Niobium & Titanium recoveries & (oxides) plus Scandium. While adding value added CaCO3 & MgCO3 & an Fe product as possible saleable byproducts &/or "backfill" as mentioned (below). Winding it all up into a final 2022 F.S package...
Process Enhancements to NioCorp’s Critical Minerals Project Plans Point to Possible CAPEX and OPEX Reductions and Possible Lower Greenhouse Gas Emissions
https://www.niocorp.com/process-enhancements-to-niocorps-critical-minerals-project-plans-point-to-possible-capex-and-opex-reductions-and-possible-lower-greenhouse-gas-emissions/
As we wait for material new "as it becomes available."
Maybe a U.S. STEEL company is a part of the (A,B,C,D,E.... combination after all?) Waiting with many in my front row seat!
Chico
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