News Article | May 29, 2017
- High recovery of 88.4% vs market benchmark of 70 to 75% - Overall recovery from spodumene to carbonate of 81.4% vs market benchmark of 65% MONTREAL, QUEBEC--(Marketwired - May 29, 2017) - Critical Elements Corporation (the "Corporation" or "Critical Elements") (TSX VENTURE:CRE)(OTCQX:CRECF)(FRANKFURT:F12) is pleased to announce results from Pilot Plant program recently completed by the Company with Outotec to demonstrated that the conversion of Critical Elements spodumene resources into lithium carbonate battery quality using the thermal leaching process was easily achievable. This well knowns conversion process (calcination, thermal leaching & bicarbonization & crystallization) from Spodumene concentrate to lithium carbonate showed extremely good results with extraction rates of 88.4% with very high purity of lithium carbonate of 99.9%. This extraction rate surpasses the worldwide average of between 70 to 75% in what is accepted as an industry standard. Purity of 99.9% was reached and the impurity profile is outstanding with levels of sodium below 100 ppm, calcium below 200 ppm, iron below 20 ppm and heavy metals below 5 ppm. Li CO analyses -impurity levels in Li CO The table is available at the following link: http://media3.marketwire.com/docs/Li2CO3_analyses.jpg These results demonstrated that Critical Elements approach to the lithium carbonate processing plant has been validated and do not require any additional cost intensive purification steps. The diagram below illustrates the Critical Elements process flow: The diagram is available at the following link: http://media3.marketwire.com/docs/CE_FlowSheet.jpg "This supports the low impurity profile of our ore allows us the production of lithium carbonate battery quality at competitive costs without additional purification steps" said Jean-Sébastien Lavallée, Chairman and CEO of Critical Elements. As supported by these tests, and by choosing this technology (i.e. Thermal Leaching Process) Critical Elements has demonstrated their technological leadership, which will result in a superior product at the lowest possible cost. Details on piloting work program achieve over 336 hours at Outotec Pilot plant: To date Critical Elements has completed the following testing and piloting work: This is shown graphically below: The graph is available at the following link: http://media3.marketwire.com/docs/CE_Dev.Status.jpg Based on the results of the above work and modelling conducted by Outotec, Critical Elements believes that the overall total recovery rate should approach 81% which compares very favorably to industry standards which are typically in the low to mid 60's. This recovery is based on the following: Outotec is a leading technology company in multiple mining and extraction industries, including the lithium industry, with sites in Frankfurt, Germany and Pori, Finland, as well as other locations. They offer competent knowledge of the various processing options for both beneficiating spodumene, as well as converting spodumene into saleable lithium salts. Their lithium expertise includes multiple years of research into various lithium processing options; including the understanding and optimizing the process Critical Elements has chosen for lithium extraction. Jean-Sébastien Lavallée (OGQ #773), geologist, shareholder and Chairman and Chief Executive Officer of the Company and a Qualified Person under NI 43-101, has reviewed and approved the technical content of this release. A recent financial analysis (Technical Report and Preliminary Economic Assessment (PEA) on the Rose lithium-tantalum Project, Genivar, December 2011) of the Rose project, 100% owned by Critical Elements, based on price forecasts of US $260/kg ($118/lb) for Ta O contained in a tantalite concentrate and US $6,000/t for lithium carbonate (Li CO ) showed an estimated after-tax Internal Rate of Return (IRR) of 25% for the Rose project, with an estimated Net Present Value (NPV) of CA $279 million at an 8% discount rate. The payback period is estimated at 4.1 years. The pre-tax IRR is estimated at 33% and the NPV at CA $488 million at a discount rate of 8%. (Mineral resources are not mineral reserves and do not have demonstrated economic viability). (The preliminary economic assessment is preliminary in nature). (See press release dated November 21, 2011.) The PEA includes inferred mineral resources that are considered too speculative geologically to have economic considerations applied to them that would enable them to be categorized as mineral reserves and there is no certainty that the preliminary economic assessment will be realized. The conclusions of the PEA indicate that the operation would support a production rate of 26,606 tons of high purity (99.9% battery grade) Li CO and 206,670 pounds of Ta O per year over a 17-year mine life. The project hosts a current Indicated resource of 26.5 million tonnes of 1.30% Li O Eq. or 0.98% Li O and 163 ppm Ta O and an Inferred resource of 10.7 million tonnes of 1.14% Li O Eq. or 0.86% Li O and 145 ppm Ta O . Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
News Article | May 29, 2017
- Production de carbonate de lithium de haute pureté 99,9 % - Haut taux de récupération de 88,4% versus le standard du marché qui se situe entre 70 et 75 % - Taux de récupération global du spodumène au carbonate de lithium de 81,4 % versus le standard du marché à 65 % MONTRÉAL, QUÉBEC--(Marketwired - 29 mai 2017) - Corporation Éléments Critiques (la « Société » ou « Critical Elements ») (TSX CROISSANCE:CRE)(OTCQX:CRECF)(FRANCFORT:F12) est heureuse d'annoncer les résultats du récent programme effectué par la Société en collaboration avec Outotec. Ce programme avait pour but de démontrer, que la conversion du concentré de spodumène en carbonate de lithium de qualité batterie en utilisant le procédé de flottation, était facilement réalisable. Bien connu, ce processus de conversion (calcination, lixiviation thermique, bicarbonisation et cristallisation) à partir du concentré de spodumène au carbonate de lithium, a révélé d'excellents résultats avec des taux d'extraction de 88,4 % et une pureté très élevée de carbonate de lithium à 99,9 %. Ce taux d'extraction surpasse la moyenne mondiale de 70 à 75 % qui est considéré comme la norme dans l'industrie. Le tableau est disponible à l'adresse suivante : http://media3.marketwire.com/docs/Li2CO3_fr.jpg Ces résultats ont démontré que l'approche de Critical Elements quant au traitement du carbonate de lithium ne nécessite pas d'étapes de purification supplémentaires coûteuses. Le schéma ci-dessous illustre le déroulement des opérations : « Cela confirme que le faible profil d'impureté de notre minerai nous permet de produire du carbonate de lithium de qualité batterie à des coûts compétitifs sans étapes de purification supplémentaires, » a commenté Jean-Sébastien Lavallée, président du conseil et chef de la direction de Critical Elements. Comme ces tests le confirment et en choisissant cette technologie (c'est-à-dire le procédé de lixiviation thermique-bicarbonisation), Critical Elements continue de démontrer son leadership technologique, qui se traduira par un produit supérieur à moindre coût. DÉTAILS SUR LES TRAVAUX COMPLÉTÉS EN USINE PILOTE Détails sur le programme de travaux en usine pilote qui a atteint plus de 336 heures à l'usine pilote d'Outotec. Jusqu'à présent, Critical Elements a complété les essais pilotes suivants : Selon les résultats du travail et de la modélisation ci-dessus menés par Outotec, Critical Elements estime que le taux global de récupération devrait atteindre 81 %, ce qui se compare très favorablement aux normes de l'industrie qui sont généralement de 60 et 65 %. Cette récupération est basée sur les éléments suivants : Outotec est un chef de file technologique opérant dans de multiples industries minières et extractives, incluant le domaine du lithium. Outotec a des établissements à Francfort en Allemagne, à Pori en Finlande et ailleurs dans le monde. Elle propose les conseils d'experts sur les différentes options de conversion du spodumène en sels de lithium commercialisables. Leur expertise du lithium provient de plusieurs années de recherche sur les différentes options de traitement du lithium; en particulier la compréhension et l'optimisation du processus que Critical Elements a choisi pour l'extraction au lithium. Jean-Sébastien Lavallée (OGQ # 773), géologue, actionnaire, président du conseil et chef de la direction de la Société et Personne Qualifiée selon le Règlement 43-101, a révisé et approuvé le contenu technique du présent communiqué. La Société a récemment publié une analyse financière du Projet Rose détenue à 100 % par Critical Elements (Étude économique préliminaire (PEA) du projet Rose lithium-tantale, Genivar, décembre 2011) qui est basée sur des prédictions de prix de 260 $ US/kg (118 $/lb) pour le Ta O contenu dans le concentré de tantalite et de 6 000 $ US/t pour le carbonate de lithium (Li CO ). Le taux de rendement interne (« TRI ») du Projet Rose est estimé à 25 % après impôts et la valeur actualisée nette (« VAN ») à 279 millions $ CA à un taux d'escompte de 8 %. La période de recouvrement est estimée à 4,1 ans. Le TRI avant impôts du Projet Rose est estimé à 33 % et la VAN à 488 millions $ CA à un taux d'escompte de 8 %. (Une ressource minérale n'est pas une réserve si elle n'a pas démontré sa viabilité économique.) Voir le communiqué de presse daté du 21 novembre 2011. L'analyse financière préliminaire inclut des ressources minérales inférées considérées comme trop spéculatives géologiquement pour avoir des considérations économiques d'appliquées pour être catégorisées comme des réserves minérales et il n'y a aucune certitude que l'étude économique préliminaire pourra être réalisée. Les conclusions du PEA indiquent que l'opération pourrait soutenir un taux de production de 26 606 tonnes de carbonate de lithium haute pureté (> 99,9 % Li CO ) et 206 670 livres de Ta O par an sur une durée de vie de 17 ans. Le Projet Rose contient actuellement une Ressource Minérale de 26,5 millions de tonnes de Ressources Minérales Indiquées à une teneur de 1,30 % Li O Eq. ou 0,98 % Li O et 163 ppm Ta O et 10.7 millions de tonnes de Ressources Minérales Présumées à une teneur de 1,14 % Li2O Eq. ou 0,86 % Li O et 145 ppm Ta O . Ni la Bourse de croissance du TSX ni les autorités réglementaires (telles que définies par les politiques de la Bourse de croissance du TSX) n'ont accepté de responsabilité pour l'exactitude et la précision du présent communiqué.
Tetreault P.R.,Genivar Inc. |
El-Geneidy A.M.,McGill University
Transportation Research Part A: Policy and Practice | Year: 2010
In recent years, several transit agencies have been trying to be more competitive with the automobile to attract choice riders. Transit agencies can only be competitive if they can provide services that are reliable, have a short access and egress time, and have run times that are comparable to automobiles. Several transit agencies try to be competitive through offering faster service, such as limited-stop (express) bus service. This study uses AVL and APC data, in addition to a disaggregate data obtained from a travel behavior survey, to select stops and estimate run times for a new limited-stop service that will run parallel to a heavily used bus route (67 Saint-Michel) in Montréal, Canada. Three different scenarios are developed based on theory and practice to select stops to be incorporated in the new limited service. The time savings for each scenario are then evaluated as a range and a fourth scenario is developed. A limited-stop service is recommended based on selecting stops serving both directions of the route, major activity points and stop spacing. This study shows that implementing a limited-stop service would yield substantial time savings for both, the new limited service and the existing regular service running in parallel. © 2010 Elsevier Ltd.
Sun J.,Genivar Inc. |
Lovegrove G.,University of British Columbia
Canadian Journal of Civil Engineering | Year: 2013
The Canada Mortgage and Housing Corporation (CMHC) has been researching a sustainable community development pattern - the Fused Grid road network. This paper reports on research to compare the road safety level of the Fused Grid with four other networks, including: traditional (1) grid and (2) culs-de-sac patterns, and, recently developed (3) 3-way offset and (4) Dutch sustainable road safety (SRS) patterns. Community-based, macro-level collision prediction models were developed and applied with data from Vancouver, Ottawa, and Victoria. The research used standard experimental design methods, including: control-trigger variables, sensitivity analysis, and cross-sectional analysis. Statistically significant results were obtained, and suggested that neighbourhoods built following CMHC's Fused Grid road network pattern would realize a 30 to 60% higher level of road safety than the commonly-used grid and culs-de-sac patterns, and a level of safety comparable to the 3-way offset pattern. Further research topics were recommended.
Gerla P.J.,University of North Dakota |
Sharif M.U.,University of Arkansas |
Korom S.F.,Genivar Inc.
Environmental Earth Sciences | Year: 2011
Selenium (Se) is essential in the human diet, but has a low threshold for toxic concentration. It is recommended that nutrients such as Se should be consumed through foods as part of a normal diet. Se concentrations in crops and meat depend on the amount of labile Se in the soil where crops and forage are grown. Therefore, managing agriculture for optimal Se in grain crops and forage requires an understanding of the distribution and mobility of Se. Elevated concentrations of Se occur in waters, soils, and forage 120 km west of Pierre in west central South Dakota, USA. The research site lies in an elevated, dissected plain where soils developed on gently dipping Pierre Shale. Soils were sampled along catena transects and waters collected from soil, ponds, and shallow borings in areas of known elevated forage and crop Se. Soil extracts from saturatedpaste extraction and acid (aqua regia and hydrofluoric acid) extraction were analyzed. Selenate was the dominant Se species in both acid and saturated-paste extracts; selenite and organic Se were below detection (<0.2 ppb) in the same soil extracts. On average, 98% of soil Se was not water-soluble. The distribution of total Se shows much less spatial variation than water-soluble Se in the areas sampled. Se shows correlation with organic carbon in soils and waters, suggesting its association with organic carbon. Ca shows some correlation to Se in acid extracts, but not in saturated-paste extracts or in waters. Total Se shows no significant correlation to Na, Mg, and total S in the soils. Se in saturated-paste extracts and water samples shows good correlations with Na, Mg, and SO 4, suggesting that evaporitic Na-Mg-sulfate minerals may temporarily concentrate water-soluble Se in shallow soils. The dissolution and precipitation of these Na-Mg-sulfate salts together with pH and oxidation-reduction conditions apparently control water-soluble Se distribution and mobilization in shallow subsurface environments. © Springer-Verlag 2010.
Croteau A.,Genivar Inc. |
Nastev M.,Geological Survey of Canada |
Lefebvre R.,INRS - Institute National de la Recherche Scientifique
Canadian Water Resources Journal | Year: 2010
The objective of this study was to evaluate groundwater recharge in the Chateauguay River watershed. The Hydrologic Evaluation of Landfill Performance (HELP) model was used to assess daily values of recharge, evapotranspiration and runoff. The study area was divided into a regular grid, 250 m × 250 m, for a total of 47,616 grid elements. The input parameters included soil physical properties, land use, vegetation and climate data. Calibration of HELP was carried out against runoff and baseflow estimates obtained from separation of five river hydrographs. Over a 39 year period, the mean annual recharge rate was estimated at 86 mm, or 9% of the total precipitation. Areas characterized by high water level elevations and unconfined flow conditions were identified as the main recharge areas. Daily estimates show that recharge takes place mainly in spring and fall. Over the observed period, the annual variations of evapotranspiration and runoff were directly related to changes in precipitation, whereas the annual recharge response was subdued, with much lower variations. HELP was also used to assess potential climate change scenarios using data for the driest and most humid years. The mean annual recharge was 51 mm for the driest year and 99 mm for the most humid year. Differences in the spatial distribution of recharge for the predictive scenarios indicate that the areas most sensitive to climate change correspond to the preferential recharge areas. © 2010 Canadian Water Resources Association.
Salvo P.,Genivar Inc.
30th International No-Dig Conference and Exhibition 2012, No-Dig Sao Paulo 2012 | Year: 2012
This paper will present condition assessment tools that were available to the municipal engineers, as well as presenting new condition assessment tools that have become available over the last few years for both the potable water and sewer systems. These new systems are both innovative in nature and give more precise information to the decision makers. The paper will be divided in two distinct sections, the first being the sewer system condition assessment tools (past and present) for gravity sewers and force mains and the second will be for the potable water system condition assessment tools (past and present) for larger transmission pipes and for the secondary distribution pipes. Given that the sewer system is predominately an open system, access to the network is via the existing manhole chambers, with the exception of force mains which require a different approach. In the past and present, conventional CCTV inspection is used frequently. However, over the years, the improvements in the camera technology make CCTV inspections a more accurate tool. In the secondary sewer pipes, we can use a zoom camera to give us a snapshot of the state of the pipe over a short distance, usually 20 to 30 meters. The conventional CCTV cameras will show any defects in the pipe and at the service connection. In the case of an interceptor sewer pipe that has a larger diameter and is usually full of water up to 50%, conventional CCTV does not always work, because in order to see the entire pipe, the cost of by-passing the flow to get a dry pipe is too expensive and time consuming. One technology that has been very successful is the use of a Multi-Sensor Inspection unit that provides CCTV, Sonar, Laser Profiling and H2S readings in one operation. In the case of force mains, new technology exist that will allow detecting if there is a leak or can provide a method of calculating residual thickness of the pipe. In part two we will give a brief overview of the technologies that have been used and are still being used to find leaks and estimate the effectiveness and residual life of a potable water main. These technologies include correlation, geophones, C-Value testing and hydrant flows. Some of the new technologies for potable water mains allow the inspection of the water main without having to depressurize the water system. By doing so, the technology has the capability of seeing, hearing and locating leaks, unaccounted for house connections, unaccounted for valves and changes in direction, to name a few. For larger diameter pipes there are technologies that can provide leak detection using a cable tethered system and some using free flowing devices. This paper will present these tools and their applicability in the potable water network. As part of each section, some case studies will be presented to demonstrate the capability of the technology.
Todesco G.,Genivar Inc.
ASHRAE Journal | Year: 2010
The innovative design and technologies are required to achieve high performance, low energy building designs suitable for cold climates, which are 50% better than Standard 90.1-2007. Integrated design process (IDP) is adopted to design low energy buildings, which allows designer to take benefit of the synergies existing between building elements and maximize energy saving while minimizing incremental costs. The low energy design could achieve potential savings as high as 59% with the use of technologies including efficient fluorescent lighting design with a low LPD of 0.6 W/ft2, daylighting controls, effective cooling plants and alternate HVAC design such as DOAS and chilled ceiling system. The efficient lighting design and innovative variable speed, frictionless, centrifugal chiller can achieve an IPLV of 0.45 and a full load performance of 0.5 kW/ton. The implementation of renewable technologies such as photovoltaic (PV) collectors on the roof ensures the reduction in the consumption of energy of 175,000 kWh/year.
Poulin J.-F.,University of Moncton |
Poulin J.-F.,Genivar Inc. |
Villard M.-A.,University of Moncton
Landscape Ecology | Year: 2011
Conservation strategies should be based on a solid understanding of processes underlying species response to landscape change. In forests fragmented by agriculture, elevated nest predation rates have been reported in many forest bird species, especially near edges. In intensively-managed forest landscapes, timber harvesting might also be associated with negative edge effects or broader "context" effects on some species when the matrix provides additional resources to their major nest predators. In this study, we hypothesized that proximity to a forest edge and proportion of cone-producing plantations will increase nest predation risk in fragments of relatively undisturbed forest. We focused on the Brown Creeper (Certhia americana), an indicator species of late-seral forests. We compared habitat configuration and composition at four spatial scales (0.14, 0.5, 1 and 2 km) around 54 nests and related daily nest survival rate to the distance to the nearest forest edge, mean patch size of late-seral forest (r = 141 m), proportion of non-forested lands (r = 141 m), density of maintained roads (r = 1 km), proportion of cone-producing spruce plantations (r = 2 km), and year. The best model included distance to the nearest edge and proportion of cone-producing plantations. Distance of nests to the nearest edge was the best individual predictor of daily nest survival. A larger sample of nests showed a significant threshold in distance to the nearest forest edge; nests located at least 100 m away were more likely to fledge young. These results suggest that even in managed forest landscapes, matrix effects can be important and some bird species may exhibit negative edge effects. © 2011 Springer Science+Business Media B.V.