SU1031933A1 - Raw mix for preparing portland cement clinker - Google Patents

Abstract

RAW MIXTURE FOR RECEIVING A PORTLAND-CEMENT CLINKER, which includes limestone, clay, iron-containing components, so that with the aim of reducing the temperature- the blade-. formation and increase in the hydration activity of clinker, it. contains in: as an iron-containing component, waste of neutralization of pickling waters of rolling steel inpoHaaoflCTya steel sheet at the following ratio of components, wt.1: Clay component .E Waste of neutralization of pickling, waters of steel production of steel 2 -; 6 sheets Ieestn krvy. Rest

Description

with

00 00 The invention relates to a technology for the preparation of cementing materials and can be used in the firing of portland cement clinker. The known raw material mixture for the production of portland cement clinker, which includes CE, carbonate, aluminosilicate components and glands containing starch} is an additive, which uses pyrite cinders or flue dust in the following ratio of components C, wt.% Carbonate component 75-85 Aluminosilicate component. 14-22 Pyrite cinder or flue dust 1-3 1-3 However, such mixtures require high temperatures and increased fuel consumption to burn clinker. Closest to the proposed technical essence is the raw mix for the production of portland cement clinker, which includes limestone, clay and iron-containing components, as the iron-containing component, the dust collected from the flue gas from the open-hearth and converter furnaces of the steelmaking Production is used as the iron-containing component 2 ml.% by weight: Limestone component 75-97 Claystone 2.5–2-21 Dust of open-hearth and converter furnaces of steelmaking Production .0.5–4.0 Disadvantage of raw materials howl mixture for obtaining Portland cement wedge ker is a high temperature. clinker formation and low hydration activity of clinker. The purpose of the invention is to reduce the temperature of clinker formation and increase the hydration activity of clinker. The intended goal is achieved by that; that the raw material mixture for the half-portland cement clinker comprising the animal, clay and iron-containing components contains as iron containing the component neutralization waste of pickling waters of rolling steel sheet steel in the following ratio of components Mass: Clay component 9-19 neutralization waste of rolling mill pickling waters ( Steel sheet production 2-6 Limestone component Else By chemical composition, neutralization waste of pickling waters of rolling production is steel sheet consists of iron oxide (30–40%) and calcium sulfate dihydrate. Croye this includes calcium hydroxide and magnesium hydroxide as a neutralizing waste product, as well as silica, which is finely dispersed in grain composition (more than 98 % passes a sieve with openings of 0.08 mm) and does not require additional grinding before use.Table 1 shows the chemical part of the neutralization waste of pickling waters of the rolling steel sheet and dust of open-hearth and converter furnaces. An example. Raw materials are prepared to produce Portland cement clinker — using limestone and clay from the Nevinsky cement plant and the ferrous component of the VIZ steel sheet from the neutralizing pickling waste from the rolling mill, and for comparison — using the prototype — using the NTMK open-hearth furnace dust and the base facility - pyrite stubs. The mixtures are from pre-dried and ground to. odin The granularity of the components is ground and granulated on a plate granulator. Granular The mixture is burned with gas fuel at 1360 ° C. . V. tab. Table 2 lists blend compositions, calcining results and cement testing. The mineralogical composition of clinkers is given in table. 3. Acceleration of clinker-forming processes in compositions containing neutralizing waste from pickling waters of steel sheet rolling production is provided by accelerating the decarbonization process, the earlier appearance of the liquid phase, which ensures the formation of calcium silicates more quickly at well-balanced temperatures. The clinker from the proposed raw mix is distinguished by a high content and presence of Mineral 3 (Ca) CazO4 in the clinker composition, which takes place all together; TF ensures a rapid increase: the strength of cements over time and a higher final strength of cements from these clinkers compared to the prototype.

Use in the composition of raw materials. mixtures for obtaining portland cement clinker as an iron-containing component of the neutralization waste of pickling waters of steel sheet steel production reduces the temperature of clinker formation and increases the hydration activity of clinker, fuel economy, increased furnace productivity and increased durability of the lining in furnaces due to lower calcination temperature cements and waste management.

Table 1

2.25

8.86

9.98

14.84

, 36.29 22.0 0.85 .29.75

4.92 57.78 6.52 2.330.99

Table

2

22

40 38

20

Table 3

Claims (1)

RAW MATERIAL MIXTURE FOR PRODUCING PORTLAND CEMENT CLINKER, including limestone, clay, “Iron-containing components, with the exception of the fact that in order to reduce the temperature of the blade · • formation and increase the hydration activity of the clinker, it . contains nd as an iron-containing component waste neutralization of pickling water from rolling! production of steel sheet in the following ratio of components, May.%: Clay component ‘9-19 Waste neutralization pickling, rolling water production steel leaf 2 -.- 6 Limestone component j Rest