SU591425A1 - Mixture for manufacturing cement raw material - Google Patents

Description

(54) RAW MIXTURE; FOR RECEIVING A CEMENT CLINKER

The resulting mixture is prepared in a form-11i, chidra with a diameter of 30 mm and a height of that 40 mm, which are pressed at a specific pressure of 800 kg / cm, then decaronised at 900 ° C for 15 minutes after which they are fired in sieve silicon 1400 and 1450 ° C with an exposure time of 15 min. The degree of completion of the clinker-formation reactions is controlled by the content of free lime in the resulting soyokah, the determination of which is carried out by the ethyl-glyierate method.

PRI mme R 2. Mix limestone, a clay component, a calcine, boric anhydride, and a mixture with alkaline water and nepheline concentrate, ensuring the presence in clinker of 4 wt.% (NojO KjO) D) weight ratio 6: 1, the mixture with the following ratio of components, wt.%: Known to 70.0 Clay component 21.5 Ogarki 3.0 Boric anhydride 1.5 4c, jO KjO ° After homogenization and briquetting, the mixture is calcined at 1400 with preliminary decarbonization at. Briquetting, roasting

The degree of completion of the clinkering reactions is monitored as in Example 1.

In tab. I shows the composition of the raw mixes and the degree of assimilation of lime during calcination.

In tab. 2 limits of compressive strength of cements synthesized with belite clinkers.

The addition of sodium and potassium oxides to the composition of raw mixtures along with V, O. increases the viscosity of the clinker melt formed during the burning of clinker and ensures its more optimal structure from the point of view of the formation of granules, which prevents the formation of lumps and welds in the kiln and improves technological furnace operation parameters.

An increase in the hydration activity obtained on the basis of the above mixtures of cement belite clinkers is ensured by the use of an additive of sodium oxide and potassium oxide together with BgOj.Blinkers to stabilize the oL-form CjS, which has an increased hydration activity.

table 2

The invention Raw materials for cement clinker, including clay component, limestone, cinder, boric anhydride and an additive, characterized in that, in order to increase the hydration activity, it contains sodium oxide and potassium oxide as an additive in a ratio of 3 : 1 to 6 S1, in the following ratio of components, wt.%: Clay component 20.5-21, Known to 70.0-75, Ogarki2.0-3.0 Boric anhydride 0.5-1.5 Additive, 2, 0-4,0 Sources of information, taking into account during the examination: 1. Makashev SD. fluorspar on the assimilation of CaO during the firing of cement raw materials, Cement, 4, 1950, p. 3-9. 2. Forward 2151659 / 29-33, cl. From 04 to 7/42, 1975, according to which the decision to issue an author's certificate was made.