SU576346A1 - Method of lumping manganese ores and concentrates - Google Patents

Description

one

The invention relates to metallurgy, in particular, to the methods of the oskus ore of ore materials.

A known method for the sintering of manganese ores and concentrates, including briquetting the mixture with the introduction of an inorganic binder in the form of a manganese compound — manganese sulphate and baking briquettes at a temperature of more than 1000 ° C.

The disadvantages of this method are the harmful effect of sulfur introduced with manganese sulfate, which is emitted during the smelting of agglomerated concentrates in the form of SOj and worsens the working conditions, the high cost of sulfate itself and the content of crystallization water in it, as well as the need for additional energy consumption for sulfate decomposition and removal water.

The proposed method differs from the known one in that manganese hydrate is introduced into the charge as a binder and calcined at 80-250 ° C. This even reduces the cost of briquettes.

The amount of IS added to manganese ore or manganese oxide hydrate concentrate (recalculated manganese is not less than 1/7 manganese contained in the ore, and the moisture content in the charge does not exceed 40%. In the mixture of manganese oxide hydrate to the mixture may be Moisturizing added

The yl containing lower oxides of manganese is trapped when cleaning the waste gases of ferroalloy furnaces before it is discharged from dust collection devices.

Hardening of briquettes occurs due to the dehydration and carbonization of manganese oxide hydrate, which is formed as a result of the interaction of oxides contained in the dust of ferroalloy furnaces with moisture. Example. Manganese concentrate, i.e., the dust collected during the purification of waste gases from ferroslavna furnaces, is added to manganese oxide hydrate containing 86.8% moisture. The ratio of dust to hydrated hydrated manganese oxide 20: 8.

The mixing components are for

5 minutes. Then the resulting mixture is briquetted.

under pressure of 50 kgf on the briquette. Received

thus briquettes with a diameter of 20 mm and

39 mm high burned at 180 ° C for

60 min After firing, briquettes have a strong resistance to average

174 kg / cm.

According to the analysis carried out, dust collected from ferroalloy furnaces has a following chemical analysis, weight. %: Si4,73

MP39.6

Fe2.31

A11,28

Sa

2.2

Mg 0.69

MpO2

19.14

p 0.3

Spectral following, s:

Ni blend analysis

There is Co Ti Cu Pb Zn Ag Sn Cd K Na

Sl -0,001

there is

Small

there is

Met

Iet

No mi

Pl Cr Bi

1-1et

Met

Met Zr W Sb As

Met

Met

Met

e Сл - thousand shares%; Mal - hundredths of a%; There are - the tenth share of%; , 5% to 1-2%; Mn - whole%.

Due to the high dispersion of dust, it cannot be used by direct re-returning it to the kiln.

The technical and economic efficiency of the described method is especially affected by the introduction into production of commonly unused sources of raw materials, namely: the poor, not amenable to briquetting, agglomeration, pelletizing of ores and dust caught in the cleaning facilities of ore-thermal electric furnaces.

Formula p 3 o b e e n i

A method of sintering margaite ores and coicentrates, including briquetting polish with the introduction of an inorganic binder in the form of a manganese compound and baking baking, characterized in that, to reduce the cost of briquettes, manganese hydrate is added as a binder in batch and calcined at 80 -250 ° C.

Sources of information taken into account in the examination

1. Copyright certificate № 154290, cl. C 22B 1/243, 1963.