RU2001102320A

RU2001102320A - The method of obtaining ferromanganese and silicomanganese

Info

Publication number: RU2001102320A
Application number: RU2001102320/02A
Authority: RU
Inventors: Рафкат Спартакович Тахаутдинов; Юрий Алексеевич Бодяев; Абдрашит Мусеевич Бигеев; Владимир Юрьевич Кочкин
Original assignee: Открытое акционерное общество "Магнитогорский металлургический комбинат"
Filing date: 2001-01-24
Publication date: 2003-05-10

Claims

A method for producing low-phosphorous ferromanganese and silicomanganese from poor manganese ores in at least two successive aggregates, including continuously loading a charge consisting of manganese ore, coal, a metal additive, oxygen supply, melting the charge and subsequent heating to a predetermined temperature , continuous separate release of slag into the second unit and metal into the molds, characterized in that coal and metal additive are supplied to the first unit in an amount that ensures reduction of phosphorus to its content in the slag of less than 0.02%, while the consumption of metal additives g ppm 1 is determined by the following relationship:

where grud. - the amount of manganese ore, kg;

(P) p and (P) - phosphorus content in ore and slag, respectively,%;

Lp is the phosphorus distribution coefficient;

gshl.1 - the amount of slag formed, kg;

gmet.1 - the amount of reduced metal, kg;

[P] ppm - phosphorus content in the metal additive,%,

in the second unit for producing ferromanganese, lime is additionally supplied as a flux to ensure slag basicity of more than 1.5, a metal additive and the slag is treated with a mixture of oxygen and coal, until the final slag with a manganese content of less than 9% is obtained, the slag and ferromanganese are separately released, while the flow rate of metal additives g ppm 2 is determined by the following relationship:

where gshl.1 - the amount of slag from the first unit, kg;

gshl.2 - the amount of slag formed in the second unit, kg;

gmet.2 - the amount of reduced metal in the second unit, kg;

(Mn) chl.1 - manganese content in the slag of the first unit,%;

[Mn] Fe Mn — manganese content in ferromanganese,%;

[Mn] ppm - the manganese content in the metal additive,%;

L Mn is the distribution coefficient of manganese;

(Mi) p - manganese content in ore,%,

slag from the first aggregate and a metal additive are fed into the third unit for producing silicomanganese, the slag is treated with a mixture of oxygen and coal, to obtain slag with a manganese oxide content of less than 12%, the slag and silicomanganese are separately released, with the consumption of metal additive gm. D.3 is determined by the following relationship:

where gshl.1 - the amount of slag from the first unit, kg;

gshl.3 - the amount of slag formed in the third unit, kg;

gmet.3 - the amount of reduced metal in the third unit, kg;

(Si) chl.1 - silicon content in the slag of the first unit,%;

[Si] SiMn — silicon content in ferromanganese,%;

[si] ppm is the silicon content in the metal additive,%;

Lsi is the distribution coefficient of silicon.