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Lithium in a salar is dissolved in brine under the salt crust. It is pumped into ponds and left to evaporate for twelve to twenty-four months until it is concentrated enough to be worth processing. Almost none of the value is added in Chile; the concentrate leaves as a chemical and comes back, eventually, as a car.
- Malzeme
- Lithium
- Çeşit
- Salar brine, roughly 1,500–2,000 mg of lithium per litre
- Nereden başlıyor
- Chile — Salar de Atacama, 2,300 m up in the driest desert on Earth
Adım adım ve sınırdan sınıra
Chile · Salar de Atacama elinde SQM and Albemarle, under CORFO concessions (Madenci)
Pumping the ore to the surface
Brine is pumped from wells 30–200 m below the salt crust. No blasting, no haul trucks, no waste rock — the ore arrives as a liquid.
Neden burada: Closed basin, high altitude, volcanic highlands feeding it, and almost no rainfall. Very few places on Earth combine all four.
Chile · Evaporation ponds elinde SQM and Albemarle (Madenci)
Eighteen months of sunshine
The brine moves through a cascade of ponds. Sodium, potassium and magnesium salts crystallise out in sequence and are harvested; the lithium stays in solution and concentrates.
Geri kalanına ne oldu: Around 95% of the water evaporates into the desert air. Potash is harvested as a genuine co-product, not a waste.
Neden burada: This step is free solar energy and eighteen months of patience. It cannot be moved somewhere with less sun and it cannot be hurried.
Chile · Salar del Carmen, near Antofagasta elinde SQM / Albemarle (Kimyasal)
Into a chemical
The concentrate is trucked to the coast, purified of boron and magnesium, and reacted with soda ash to precipitate lithium carbonate.
Geri kalanına ne oldu: This is the last step performed in Chile. Everything downstream — and most of the value — happens elsewhere.
Neden burada: Near the port and the power, and required by the concession terms.
China · To Chinese and Korean cathode plants elinde Traders and cathode makers (Tüccar)
Across the Pacific in a container
Lithium carbonate ships as an ordinary bagged chemical in a standard container. At this point custody leaves the mining industry entirely.
Neden burada: Cathode manufacture is where the buyers are. The chemical goes to the factory; the factory does not come to the salar.
China · Cathode plant elinde Cathode manufacturer (Üretici)
Becoming a cathode
The carbonate is combined with an iron-phosphate or nickel-manganese-cobalt precursor and calcined into cathode active material — a black powder.
Geri kalanına ne oldu: Carbonate is only about 19% lithium by weight. The rest of the mass was always carbon and oxygen.
Neden burada: Calcination to a tight particle-size specification is the hardest step to qualify, and the qualified plants are concentrated in a few places.
China · Cell plant and vehicle assembly elinde Battery and vehicle manufacturers (Üretici)
Into a cell, then a pack, then a car
Cathode powder is coated onto aluminium foil, paired with a graphite anode on copper foil, wound or stacked, filled with electrolyte and sealed. The cells become modules, the modules become a pack.
Neden burada: Cells are heavy and awkward to ship, so cell plants cluster near vehicle assembly.
Germany · Wherever it is sold elinde The driver (Son kullanıcı)
A car, for maybe fifteen years
Roughly 8 kg of contained lithium, from a million litres of desert brine, now sits under a car floor. At end of life it can be recovered — recycling returns lithium at high rates once the collection system exists.
Neden burada: The car is sold where the demand is. The lithium has now crossed three continents.
Bu çalışılmış bir örnektir. Belirtilen bir başlangıç miktarını, yayımlanmış tipik verim ve geri kazanım oranları üzerinden takip eder; dolayısıyla oranlar doğrulanabilir niteliktedir; belirli bir sevkiyatın kaydı değildir. Güzergâh bilgileri — hangi ülkeler, hangi işlemler ve malzemenin neden başka bir yerde işlenemeyeceği — kamuya açık raporlardan derlenmiştir.