SU1024432A1 - Raw mix for producing ferrous cement - Google Patents

Abstract

RAW MIXTURE FOR PREPARING IRON CEMENT, including limestone and iron ore components, characterized in that, in order to increase strength in the early periods of hardening, it additionally contains manganese oxide and titanium-magnesium production waste in the following ratio of components, in May. 5-41.5 nent 0.5-2.5 Manganese oxide Waste of titanium-magnesium production in the limestone coma Rest of g

Description

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Development is related to the production of special cements and can be used in metallurgical industry.

The known raw mixture for the production of ferrous cement, including limestone and iron ore components.

Closest to the invention to the technical essence and the achieved result is a raw material smelter for producing ferrous cement 2}, comprising, in May.%;

Iron ore component 30-50 Alumina additive 1-5 Carbon additive 1-5

Calcareous Component Else The disadvantage of the known raw materials for obtaining ferrous cements is the low strength of the cement in the early stages of hardening.

The purpose of the invention is to increase the strength of cement in the early periods of hardness; .

The proposed goal is achieved by the fact that the raw mix for the production of: ferrous cement, including limestone and iron ore complex, additionally contains manganese oxide and the waste of titanium and magnesium production in the following ratio; components, wt.%; Iron ore component33, 5-41.5 Manganese oxide 0.5-2.5 Titanamag waste. Lemon production 1-6 Limestone component Else Example. To obtain ferrous cement, raw mixtures are prepared from the following raw materials: rich oxidized ore of Stoilensky MectopoaweHHH KMA, chalk of Stoilensky deposit KMA, manganese oxide, waste of titanium and magnesium production.

In tab. 1 shows the data of the chemical composition of titanium waste production of magnesium.

In tab. 2 shows the compositions of the bbtx mixtures.

In taOl 3 shows the kinetics of calcium oxide binding in the firing process.

As can be seen from tarl. 3, in mixtures that additionally include manganese oxide and the waste of titanium-magnesium production, a more active process of lime bonding occurs. The complete disappearance of undigested lime also occurs at a lower temperature,

X-ray phase analysis of the products of burning of raw mixtures also revealed differences in the course of the process of mineral formation compared with similar studies of clinkers obtained from a known mixture. Dna-. LIZ peHTr3HorpafeH showed that in the specs of the proposed mixture, CjF is formed more intensively, as indicated, in particular, by the high intensity of the lines of dicalcium ferrite (2.78; 2.71; 2.67; 1.94 A). A more active formation of dicalcium ferrite during roasting of the proposed mixtures is also indicated by the fact of a more rapid appearance and disappearance in the phase composition of the specimens of dicalcium ferrite (2.52; 2.23; 2.11; 1.828 A), at lower temperatures. formed by intermediate compound in the CaO system.

The clinker is ground to a specific surface of 3500,

Table 4 shows the results of physical and mechanical tests,

Table 5 shows the mineralogical composition of clinkers. In tab. 6 - strength properties of briquettes with iron ore. The compositions were from 20% in the slurry and 80% in the concentrate. Press pressure of 78.45 MPa. Hardening was carried out in air

As can be seen from the table. 5 and 6, an increase in the early strength of the cement makes it possible to improve the strength characteristics of the pellets.

Thus, the invention of pos. It increases the strength of ferrous cement in the early stages of hardening.

Table 1

Boundary From 2.0 10.0 2.0 2.0 7.015.05.1 TO 6.0 13.0 10.0 10.030.09.0 Average 4.5 11.0 8.0 8.030.08.5. 0, 18 0.120.30 0.9 3.0 7.0 30.0. 0.400.80 1.5 10.030.0 15.0 0.20.50 0.9 6.0 7.40

133.5

65 59 50

237.0

341.5

Offered

114,555,202,70

2 11,304,602,25

I

25.030.5. 40,053,0 f

30,041,050,057,5

22,028,037,051,0 11,023,030,038,0

11.02

1.5 11.82 14.5 12.85

table 2

13

6

Table 3

0.80

Table 4

61.0 65.0 59.0 43.0

Table 5

70.85 70.00 5v, 00

Compressive strength, MPa, through

Cement 1h 3h 1 day I 3 day

18,525,4

. 19,026,9

15.620.1 4.914.8

.Table 6

30.0 31.2 26.5 21.7

Claims (1)

RAW MATERIAL MIXTURE FOR PRODUCING IRON CEMENT, including limestone and iron ore components, characterized in that, in order to increase strength in the early stages of hardening, it additionally contains manganese oxide and titanium-magnesium production waste in the following ratio of components, May.%: Iron ore component nent 33.5-41.5 Manganese Oxide 0.5-2.5 Titanomagnes waste new production 1-6 Limestone Comp ponent Rest next nd hU ND> cement 30-50 1-5 1-5 Rest raw