SU614056A1 - Method of manufacturing portland cement - Google Patents

Description

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The invention relates to the industry of construction materials, mainly to the production of Portland cement.

A known method for the production of Portland cement by roasting a mixture of carbonate and aluminosilicate components 1.

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The disadvantage of this method is the significant energy cost of grinding the raw material adjacent and firing.

The purpose of the invention is lower energy cost.

This is achieved by the fact that according to the proposed method, igneous or metamorphic rock is introduced as an alumina-clouded component in embedded crushed stone with a size of fractions of 0.5-30 mm.

The carbonate component is introduced in the form of crushed stone with a size of fractions of 0.5–30 mm, in addition, the carbonate component is introduced in the internal sludge.

The essence of the proposed method of production of Portland cement g is as follows.

The carbon g nln carbonate-raw mixture prepared in the usual way is fed into a tank, where an aluminous molded component (metamorphic nl maglitic rock) JQ in the form of crushed stone with a fractions size of 0.5-30 mm in the amount of 1-25% is posed. From this capacitance, the raw material mixture is directly into the rotary kiln, where it is calcined at 1300-1400 ° C, resulting in a cement kiln fabricator. The proposed production method is based on the use as an aluminoscale component of basalt-type volcanic foam. The chemical composition of the main rocks is presented in the table.

Basalts 45.4-55.9 0.4-1.6 14.6-21.8 8.96-16.55 4.5-13.4 1.6-11.8 2.1-5.6

The peculiarity of basalts is the relatively low melting point (I50 ° C) and low melt viscosity. Basalt melt has a high reactivity. It contains in its composition a significant amount of silications, which ensures the formation of the Ibvoi three-cube (ironclad according to the energetically advantageous scheme directly through the interaction of oxide of the oxen and creamer dioxide (in the melt). The essence of the new theopath is to extract the limestone and basalt rock, crushing them before the resin, and crushing them before the resin, to crush them,). fraction OD-30 mm and feeding the resulting crushed stone directly into a rotary kiln without burning (prior to TOHKOIX) are crushed and corrected with a centrifugal mixture. The mixture is two cocksonent. A corrector dobrok is not required. The supply of rubble into the furnace can be carried out through one heater (preliminary displacement of components before it is fed into the furnace) and through two heat flows (without disrupting the mixing of colonents). Firing such mixtures in the form of rubble does not cause difficulties. Clinker formation, depending on the coefficient (the patient's saturation is completed at TeMoepaVype, is 50-100 ° C below the usually adopted in the production technology of the building portal of the maximum firing temperature.

Tests have shown that cements obtained from basalt charges have a high activity. Grinding capacity of clinker, obtained by the described new technology, is similar to the times: the molability of ordinary clinker.

The main advantages of the proposed technology for obtaining portland cement clinker are as follows: the use of basalts makes it possible, without large capital expenditures, to transfer a number of cement plants to a dry production method; when using a new technology, the separation of drying, fine grinding and adjustment of raw meal is eliminated from the technological scheme of production, which provides significant savings in labor, energy resources and metal; lowering the firing temperature allows up to & 1 fuel economy, increasing lining durability; there is no need to supply any corrective additives to the plants (first of all, this refers to pyrite stubs); nbuiejoioc decreases dramatically during firing by increasing the size of the KONffioHeHroB raw material pieces.

The overall economic effect from the introduction of the proposed method of production will be 1,140 thousand rubles a year with an output of 1 million tons. Portland cement per year. In the current anniversary, Ukraine is expected to convert to a dry method of production a number of plants with a total capacity of up to Ym. Thus, the economic effect from the introduction of the harmful method will be about 12 million rubles. in year.

Claims (3)

1. The production of Portland cement by roasting a mixture of carbonate and aluminosilicate KONffloHeHTOB, characterized in that, in order to reduce energy costs in the test, a molded component introduces igneous or metamorphoid rock in the form of crushed stone with a size of fractions of 0.5-30 mm. 2. A method according to claim 1, characterized in that the carbonate component is introduced in the form of rubble with a fraction size of 0.5-30 mm. 3.Ciioco6 according to claim, characterized in that Carbo-T1T1 (the th component is introduced in the form of sludge. Sources of information put into account during the examination: 1. For application N 2110202 / ZZ class. From 04 to 7/36, 03.03.75, according to which the decision to issue an author's certificate was made.