ປະ​ເພດ​ຄຳ​ຮ້ອງ
Patent - Foreign
ປະ​ເພດ​ຄຳ​ຮ້ອງຍ່ອຍ
Patent - PCT National Phase
(10) ເລກທີ ແລະ ວັນທີການຈົດທະບຽນ
ສະຖານະ
Filed
(180) ມື້​ໝົດ​ອາຍຸ
(20) ​ເລກທີ ​ແລະ ມື້ ຍື່ນ​ຄຳ​ຮ້ອງ
LA P/819 2022.01.11
(40) ​ເລກທີ ​ແລະ ວັນ​ທີ​ເຜີຍ​ແຜ່
(86) ເລກທີ ແລະ ວັນທີ ເອກະສານ PCT
(87) and Date ເລກທີ ແລະ ວັນທີ່ ເຜີຍແຜ່ PCT
(85) ວັນ​ທີເອກະສານ​ເຂົ້າ
(30) ລາຍລະອຽດບຸລິມະສິດ
CN 202010877489.6
2020.08.27
(51) ການຈັດ​ໝວດ​ໝູ່ IPC
(74) ຊຶ່ບໍລິສັດຕົວແທນ
(LA) CONCETTI- Representative Bureau in LAOS. : Ban Sokpaluang, Muong Sisattanak, Vientiane
(54) ຫົວຂໍ້
(LA) Method of producing ultra-high-purity pig iron by iron bath smelting reduction process
(EN) Method of producing ultra-high-purity pig iron by iron bath smelting reduction process
(57) ບົດສັງເຂບ
(LA)

This application relates.to a method of producrng ultraJrigh-purity pig iron by an  iron bath smelting reduction process. The method of producing ultra-6igh-purity pig
iron comprjses the foilowing  steps: screening raw materials to be fed into a vessel,
wherein the rau,materials to be fed into a vessel comprise ore powdel pulverised coal,
magnesium-containing flux and lirnestone powder; preheating and preoxidising the ore powdcr to
rcmove sulfur and arsenic in the orc powder; blowing the preheated and preoxidised
ore powder'and the magnesium-containing flux into thc smelting reduction vcsscl by an ore
powder injcction system; blowing the pulverised coal and the limestone powder into the smelting reduction vessel by a pulverised coal injection system; preparing initial molten iron by controlling the production conditions in the smelting reduction vessel; and desulfurising the initial molten iron outside the vessel to prepare ultra-high-purity pig iron. ln this method, ore powder with lower grade is pre-oxidised before being fed into the smelting reduction vessel, so as to achieve a desulfurisation rate of 50-80% and an arsenic removal rate of 30-40'/", and then the
production conditions in the smelting reduction vessel are controlled and desulphurisation outside thc vessel is perfotmed to producc ultra-high-purity pig iron. Through this method, the problem of cxcessive dependence on high-quality raw materials in domestic production of ultra-hilh-purity pig iron is sqlved.

(58) ການ​ຮຽກຮ້ອງ
ປະເພດຂອງເອກະສານ ວັນທີ ການດໍາເນີນການ
ຊື່ຂອງລາຍການວັນ​ທີສະຖານະ
Filing2022.01.11Filed
Filing2022.03.01Filed