A method of producing sodium chromate from chromite ore, which involves mixing the ore with sodium carbonate and a refractory diluent, pelleting the mixture using an aqueous solution of …
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A statistical evaluation of the cured (sintered) compressive strengths proved that pellets prepared from UG2 ore are likely to have the same, or better, compressive strength than pellets prepared ...
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The invention discloses a method for improving compressive strength of chrome ore powder pellets, which comprises the following steps: the invention prepares chrome ore pellets by …
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The firing performance of the chromium-nickel bearing iron ore pellets is greatly improved by increase in quaternary basicity, much higher compressive strength of the fired …
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Cold compressive strength (CCS) of the original test pellets was measured using an apparatus described in ISO 4700, which considers the determination of crushing strength for iron ore pellets. For individual original pellets, a CCS result of more than 150 daN can be considered acceptable, and a result of less than 60 daN is very weak [8]. The ...
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Granulometry of the chromite fines used for pellet production is an imperative enabler which controls the pellet strength and porosity by packing of particles and formation of …
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a further object of this invention is to provide a process for smelting of chrome ore agglomerates made from chromite ore fines and concentrates in all possible proportions in closed SAFs to produce HCFeCr ... to 400, 600, 800, 1000, 1200 and 1350°c for half an hour, and immediately assessing their compressive strength values at that ...
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EPMA/EDS. The developed sinter was found to possess adequate handling strength that would be well acceptable to produce ferrochrome in the SAF. KEY WORDS: chromite ore fines; pot …
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compressive strength of geopolymer mortar containing laterite soil and slaked lime M Sayfullah S, L O A Suherman, S Salam et al.- ... nickel ore have been carried out and are related to the effects of phases on the reduction and formation of nickel metal particles. For example, Krasuk et al. [9] studied the reduction of nickel oxide with CO, ...
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The compressive strength of the bentonite containing pre-reduced pellets generally improved with increased clay content between 2 and 5 ... Chrome ore beneficiation challenges & opportunities – a review. Minerals Engineering, 24 (5) (2011), pp. 375-380. View PDF View article View in Scopus Google Scholar.
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The chrome ore sinter thus produced was found to be inferior in strength, comparable to that of an iron ore sinter, but strength requirements may not be the same for both.
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Refractoriness of chrome minerals imposes challenges during chrome ore pelletization process. This study is conducted to find suitable additives to improve chrome ore pelletization and pellet properties. ... Cryolite dosing between 0.25% to 2% in pellet mix improved pellet compressive strength by 190% (63 to184 kgf) and reduced pellet swelling ...
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The effect of chromite ore granulometry and sintering process parameters was evaluated to improve the metallurgical performance of pellets in a submerged arc furnace. The …
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From the gathered compressive strength data, two groups of concrete according to ACI 211 [158] were classified, namely normal-strength concrete (NSC) with the compressive strength below 6000 psi (41.37 MPa) and the other group with that higher than 6000 psi considered as high-strength concrete (HSC). As a result, 342 and 228 data were found on ...
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Unsintered ceramsite have a lower strength relative to sintered, Liqun Luo sintered bricks with a compressive strength of 14.24 MPa, produced from shale, sewage sludge, coal gangue powder, and iron ore tailings; Ranfang Zuo investigated sintering bricks with a compressive strength of 21.79 MPa, produced with iron tailings, along with clay, coal ...
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The results demonstrate that compressive strength values of about 196 and 182 MPa after two days of hot curing can be achieved when replacing …
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Against the background of "carbon peak and carbon neutrality," it is of great practical significance to develop non-blast furnace ironmaking technology for the sustainable development of steel industry. Carbon-bearing iron ore pellet is an innovative burden of direct reduction ironmaking due to its excellent self-reducing property, and the thermal strength of …
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The compressive strength of UHPC mainly depends on the close packing density and hydration of cement as well as the pozzolanic reactions of mineral ... The addition of iron ore tailings enhances the compressive strength and impermeability of UHPC mortars due to the filling effect of IOT and the pozzolanic reaction of part of the finer IOT when ...
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The rock's compressive strength; The ore clay content; ... The most common abrasion test however, is the Bond method where a 76x25x6mm (3x1x0.25″) piece of 500 Brinell SAE 4325 chrome-nickel-molybdenum steel rotates in a falling stream of rocks under standard predetermined conditions to measure its weight loss. The resulting Ai is used to ...
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Compressive strength. Wet and oven-dried pellets were subjected to the compressive strength test by using Instron 5569 with a maximum capacity of 10 kN. The load required to fracture the pellet was considered as the compressive strength of the pellet. At least 10 samples of a particular iron ore composition were tested.
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Compressive strength of chrome ore tandartsderikxnl chrome ore crusher compressive strength specifiions impact crusher ore processing impact crusher is suitable for materials whose compressive strength is under 350mpa and particle size is less than 500mm with end products in cubic shape the impact crusher is widely used for sand and rock ...
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A novel ambient condition production of superior strength, non-abrasive, non-sticky iron ore pellets devoid of undesirable fines under the compression stress of 4 kN is presented.
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Strength and durability of iron ore tailing materials stabilized using Portland Cement as base materials: a case study of Golgohar mine. J. Transp. Infrastruct. ... the compressive strength was strongly correlated with the ratio of porosity to volumetric cement-content, and IOT-cement (5 % and 10 %) mixtures displayed suitable durability ...
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2.5. Compressive Strength of Ferro Coke The compressive strength of ferro coke was determined using a pellet ore pressure tester (Anshan Kexiang QTY-10000). The average of ten samples was used as the test result for that sample. 2.6.Reactivity and Strength after Reaction of Ferro Coke A vertical tube furnace (Fig. 2) was used to test the dis-
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Compression strength of green pellets would increase from 10.5N.P-1 to 12.61N.P-1. ... in order to provide the theory basis and technical parameters for sintering and ore proportioning of high ...
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This study is conducted to find suitable additives to improve chrome ore pelletization and pellet properties. Two types of additives (carbonaceous heating additives and …
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More recently, Pariser et al. (2018) reported that South Africa accounted for 60% of the global chrome ore (i.e., chromite) output in 2018 . Nevertheless, the growth in the FeCr industry is paralleled by chromite mining. ... Figure 15 shows pellets with a compressive strength of 3.12 ± 0.10 kN were produced using a combination of 3 wt% sodium ...
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The pellets formed are tested for compressive strength using a compression tester, model LPCM, John Chatillon and Son, New York, NY. In each instance, about 10 pellets are tested in order to obtain an average figure. The pellet formed by the method given above are tested for compressive strength when first formed and after drying at 200C.
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Compressive strength (OST 14-3-72) is regarded as one of the principal criteria of suitability of roasted iron- ore pellets for metallurgical processing. One of the machines at the Sokolovsko-Sarbaisk combine (SSGOK) was used to study the effect of the roasting
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chromite fines and recycled fines on the compressive strength of the fired and pre-reduced pellets in varying diameters were studied.6,7) ... ity chrome sinter using the Indian chromite ore fines, which will be suitable for cold handling and easy smelting in the electric arc furnace, producing ferrochrome as the final
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