์ค‘๊ตญ ๋ ˆํ”ผ๋Œ๋ผ์ดํŠธ ์ •๊ด‘ 1.5%โ€“2.0% Li2O, ์˜ค๋Š˜ ํ†ค๋‹น ๋ฆฌํŠฌ ๊ด‘์„ ๊ฐ€๊ฒฉ, ๋ฆฌํŠฌ ๊ฐ€๊ฒฉ ์ฐจํŠธ - Shanghai Metals Market (SMM)