SU1557180A1 - Charge for obtaining fluxed manganese agglomerate - Google Patents

Abstract

The invention relates to ferrous metallurgy and can be used in the production of fluxed manganese sinter for the smelting of high carbon ferromanganese. The aim of the invention is to improve the steam and moisture resistance, the mechanical strength of the fluted agglomerate and the productivity of the sintering process. In a known mixture consisting of manganese raw material, solid fuel, iron ore concentrate and flux, barite-containing material is additionally introduced in the following ratio of components, wt.%: Flux 20-40

iron ore concentrate 0.1-10

solid fuel 6-12

barite-containing material 1-10

manganese raw material else. 1 hp f-ly, 1 tab.

Description

The invention relates to ferrous metallurgy, specifically to the production of fluxed manganese sinter for the smelting of ferromanganese.

The purpose of the invention is to increase the water resistance, mechanical strength of the fluted agglomerate and the productivity of the sintering process.

The studies were conducted on a semi-industrial sintering plant with a sintered area of 1.0 m2. The height of the sintered layer in all experiments is 350 mm, the initial vacuum under the top heads is 800 mm water column, the duration of ignition is 1.5-2 minutes at 1200 ° C. The yield of sinter was determined by the content of the 4-10 mm fraction after a single drop of the agglomerate cake from a height of 2 m.

The mechanical strength of the agglomerate was determined by the content of a fraction of 5 mm after triple dropping from a height of 2 m (GOST 15137-77), the steam and moisture resistance of the agglomerate was determined by the content of a fraction of mm after steaming for 90 minutes of a sample of an agglomerate fraction of 10-20 mm weighing 1 kg.

I

The following materials were used in the experiments:

manganese concentrate, oxide, manganese content of at least 41%, moisture - 16% (TU 9-27784);

trifle of coke brand KM1, ash content not more than 13%, moisture content about 20%, volatile yield - 3% (GOST 11255-75);

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known to grade I, content: Ca f MgO 58.5% (TU 14-1-237-72);

iron ore concentrate, iron content not less than 57% (TU 14-9-52- 73).

To study the mechanical properties of the agglomerate, samples were prepared for sintering from a mixture of a known compound, in which the following amount of barite ore was additionally introduced, wt.%: 0; 0.1; 5.05; ten; 10.5.

For each variant, three speculations were performed.

The composition of the charge and the main indicators of sintering fluxed manganese sinter are given in the table.

 From the data in the table it can be seen that a decrease in the content of barite ore below 1% does not allow to obtain a vapor-water-resistant manganese sinter. An increase in barite ore in the charge of more than 10% leads to a deterioration of the technological parameters of sintering, while the quality of the sinter somewhat reduces with due to a decrease in the concentration of manganese oxides. i

Thus, when the content of basalite ore in the range of 1-10%, fluxed manganese sinter is obtained to obtain enhanced steam and moisture resistance and mechanical strength, as well as maximum performance of sinter plants.

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Claims (2)

1. A mixture for producing fluxed manganese agglomerate, including manganese-containing raw materials, solid fuel, iron-containing material and flux, which, in order to increase steam resistance, mechanical strength of the fluxed agglomerate and the performance of the agglomeration process, also contains barium material the following ratio of components, wt.%: Solid fuel6-12 Flux20 - AO Iron-containing material0, 1 - 10.0 - Barium-containing material1-10 Manganese-containing raw material Rest 2. Batch according to claim 1, characterized in that the barium-containing material has the following chemical composition, wt.%: Barium sulphate30 - 60 Calcium oxide 15-30 Magnesium Oxide 1-10 Aluminum oxide 1-7 Silicon dioxide 1 - 10 Iron oxidesEverything Known for shell rock Dolomite Solid fuel: Coke Me anthracite fluff gas angle Iron ore concentrate Bgritov ore yield of {class + mm), g The strength of the agglomerate (mm class), X Steam-steam after processing with pitch (kmss +5 nor), g Productivity of sinter plant, X 47.5 47.5 11.5 11.5 11.5 11.4 thirty thirty thirty 12 13 13 13 13 13 11.5 13 0.1 5.05 20 5.5 10 ---- 0.5 1 84 84.2 84.1 83.5 83.7 84.7 84.7 86.5 88 10,55,055,055,055,05 10,55,55,55,55,5 87,588,386,086,186,5 94.8 94.2 95.1 94.0 93.8 56, about 95.3 96.3 97 96,996,196,196,096.4. 97.8 97.5 98 96.0 97.5 44 98.4 99 99 98,698,79998,899.0 100 102 100 98 99 120 125 140 120 105140137140138. Editor M.Petrova Tehred.Hodanich Order 699 Circulation 500 Subscription BNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 4/5, Moscow, Zh-35, Raushsk nab. 113035 Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 thirty thirty thirty 12 13 0.1 5.05 20 5.5 10  one Proofreader M. Sharoshi