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Minerals 2017, 7, 57 3 of 12 Minerals 2017, 7, 57 3 of 12 analysis. After the solid-liquid separation was carried out, the evaporation and crystallization were In the process, solid and liquid samples were separated by filtration and for chemical analysis. After continued. the solid-liquid separation was carried out, the evaporation and crystallization were continued. 3. Results and Discussion 3. Results and Discussion 33.1.1. .LLitihthiuiumDisisttrribibuttiiooniinQarhanSalltLake AAlalragregedrdyrsyalstapltlapinlaaindan1d0v1a0ryvianrgyisnizgedsizberdinebrlainkeslackoenstcitountsetsituhtepsrtehsenptrtesrernatinteorfrtahineQoafrthaen SQalatrLhakneS,awlthLicahkeis, w16h8ickhmislo1n68gkfrmomloneagsftrtomweassttatnodwveasrtiaensdinvwariidetshinfrwomidt2h0~fr4o0mkm20.~T40hekmQ.arThaen SQalatrLhakneScalnt Lbaekdeicvaidnebdeidnitvoidfoeudrinmtoaifnourergmioanins frreogmioneassftrotomweeast:ttohwe Hesut:otbhuexHuunorbeugxioun,rtehgeioQna,rthaen reQgaiorhna,nthreeDgiaobnu,xthuenDreagbiuonxu,annrdegthioenB,iaenledtatnhereBgiieolnet,aansrsehgoiwon,iansFsihgouwren1i.nInFtiegrusrteiti1a.lIbnrtienrestwitiaslmbriined was mined in the Bieletan region and then transported by collection trenches to salt ponds. Brine was in the Bieletan region and then transported by collection trenches to salt ponds. Brine was evaporated evaporated in these ponds to crystallize carnallite for KCl production. The entrance of the salt pond in these ponds to crystallize carnallite for KCl production. The entrance of the salt pond (Site a) is (Site a) is about 28 km away from the Bieletan region. In order to reduce costs and increase energy about 28 km away from the Bieletan region. In order to reduce costs and increase energy saving, saving, brine flow was only driven by its gravitational potential and no extra power was supplied brine flow was only driven by its gravitational potential and no extra power was supplied during during transportation. After long distance transportation in open-air, brine composition changes and transportation. After long distance transportation in open-air, brine composition changes and differs differs from its initial state. from its initial state. Figure 1 (A) Qarhan Salt Lake ichnography; (B) Detail of salt pond in the Salt Lake Group. The Figure 1. (A) Qarhan Salt Lake ichnography; (B) Detail of salt pond in the Salt Lake Group. sampling site in evaporation precess was presented by yellow dots. (a: source brine; b: NaCl pond 1; The sampling site in evaporation precess was presented by yellow dots. (a: source brine; b: NaCl pond 1; c: NaCl pond 2; d: brine adjusting pond; e: carnallite pond 1; f: carnallite pond 2; g: carnallite pond 3; c: NaCl pond 2; d: brine adjusting pond; e: carnallite pond 1; f: carnallite pond 2; g: carnallite pond 3; h: residue brine pond). h: residue brine pond). The lithium concentration value in the different regions of whole Qarhan Salt Lake is listed in The lithium concentration value in the different regions of whole Qarhan Salt Lake is listed in Table 1. Based on Figure 1, lithium resource distribution in the Qarhan Salt Lake presented a regional Table 1. Based on Figure 1, lithium resource distribution in the Qarhan Salt Lake presented a regional feature: lithium gradient concentration of brine increased from east to west, south to north. Bieletan feature: lithium gradient concentration of brine increased from east to west, south to north. Bieletan region, the northwest edge of the Qarhan Salt Lake presented the highest lithium concentration level. region, the northwest edge of the Qarhan Salt Lake presented the highest lithium concentration level. Table 1. Lithium concentration and the magnesium-lithium ratio of the Qarhan Salt Lake. Lake Name Huobuxun Huobuxun (N) Huobuxun (S) Tuanjie Xiezuo Qarhan Water Type Interstitial brine Surface brine Surface brine Surface brine Surface brine Interstitial brine pH Salinity (g/L) 6.70 311.2 - 306.8 6.70 346.1 5.40 425.3 5.50 358.5 7.00 321.1 Mg2+ (g/L) 21.19 7.74 19.71 98.69 64.69 28.67 Li+ (mg/L) 10.3 88.4 19.6 59.0 28.6 15.6 [Mg2+]/[Li+] 2057.76 87.55 1004.08 1672.71 226.18 1837.63PDF Image | Lithium during Brine Evaporation and KCl Production Plants
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