Pyrolysis apparatus of chloride compound and method for hydrometallurgical of nickel ore using a apparatus including the same

• Main Authors: PARK MIN KYU, KWON O HAK, PARK CHIN YOUNG, CHOI SUAK HUAN, KIM HO LIM
• Format: Patent
• Language: English; Korean
• Published: 23.07.2018
• Subjects: CHEMISTRY; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; COMPOUNDS THEREOF; FERROUS OR NON-FERROUS ALLOYS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

Disclosed are a chloride compound pyrolyzing device which directly reacts nickel ore with hydrochloric acid gas produced during the pyrolysis of magnesium chloride without recovery, and a hydrometallurgy method of nickel ore using an apparatus including the chloride compound pyrolyzing device. An objective of the present invention is to provide a chloride compound pyrolyzing device which enables a product to be collected at high temperatures and has excellent conversion rate and product recovery rate when converting a magnesium chloride solution into a magnesium oxide powder. The hydrometallurgy method of nickel ore comprises: an acid-leaching step a) of supplying hydrochloric acid and a gel relieving agent to pulverized nickel ore powder to separate the pulverized nickel ore powder into a nickel solution and silicon dioxide in a solid phase; a first refining step b) of removing iron component remaining in the separated nickel solution; and a second refining step c) of extracting nickel in a solid phase from the iron component-removed nickel solution, drying the extracted nickel in the solid phase to produce a concentrated nickel, and separating a residual magnesium chloride solution from the concentrated nickel. The hydrometallurgy method comprises the steps of: supplying the separated magnesium chloride solution to the hydrolyzing device to pyrolyze the magnesium chloride solution into the magnesium oxide powder and, at the same time, supplying hydrochloric acid gas produced during the pyrolysis to the step a) without recovery; settling a coarse powder in the converted magnesium oxide powder to discharge the settled coarse powder through the bottom of a heating furnace; and diffusing fine powder in the converted magnesium oxide powder in an upward direction to collect the fine powder in a ceramic filter provided within the heating furnace. 염화마그네슘의 열분해 시 생성되는 염산 가스를 회수 없이 직접 니켈 원광석과 반응시키는, 염소 화합물의 열분해 장치 및 이를 포함하는 장치를 이용한 니켈 광석의 습식 제련 방법이 개시된다. 상기 니켈 광석의 습식 제련 방법은, a) 분쇄된 니켈 광석 분말에 염산 및 겔 해소제를 공급하여 니켈 용액과 고상의 이산화규소로 분리하는 산-침출 단계; b) 상기 분리된 니켈 용액에 잔류하는 철 성분을 제거하는 제1 정제 단계; 및 c) 상기 철 성분이 제거된 니켈 용액으로부터 고상의 니켈을 추출한 후 건조시켜 농축된 니켈을 생성하고, 잔여 염화마그네슘 용액은 분리하는 제2 정제 단계;를 포함하며, 상기 분리된 염화마그네슘 용액을 열분해 장치에 공급하여 산화마그네슘 분말로 열분해시키는 동시에, 상기 열분해 시 생성되는 염산 가스를 상기 a) 단계에 회수 없이 공급하고, 상기 전환된 산화마그네슘 분말 중 조분은 침강되어 상기 가열로의 하부를 통해 배출되고, 미분은 상부 방향으로 확산되어 상기 가열로 내부에 구비된 세라믹 필터에 포집되는 것을 특징으로 한다.