SU1735216A1 - Method for production of binder - Google Patents

Abstract

Invention m. used in the building materials industry. SUMMARY OF THE INVENTION: The method for preparing a mortar involves burning at 800-850 ° C of a mixture of filter press mud with ash and slag waste and clay at a ratio, wt.%: 22.5-54 - 35-60 - 11-17.5. The calcination product is ground together with gypsum and then mixed with Portland cement. Energy consumption of kcal / kg of lime 1977,677. 3 tab.

Description

The invention relates to the building materials industry and can be used in the non-autoclaving manufacture of products.

The purpose of the invention is to reduce the energy consumption in the preparation of a toast.

As a carbonate component, a filter press precipitate of sugar production sludge is used, which is the product of the interaction of Sugars of diffusion juice with lime and carbon dioxide in the process of its purification and has the following composition,% of dry substances of the sediment:

Sugar0-1,5

Calcium Carbonate 75

Organic matter15.4

Mineral, pectin

substances, lime in the form of

salts of various acids, etc. The rest

The moisture content of the press filter cake is 20-30% at the factory.

Ashes and slag components use slag waste GRES. The mass loss during calcination of the ash-slag component is 11-17%, the remaining components of the following chemical composition, wt.%: SI02 52.24; AlaOa 27.10; ReaOz 9.56; CaO 1.84; MDO 1.96; AOR 0.78; TiO2 1.16; K20 3.86: Na20 1.10; RaOb 0.32; MpOO, 19.

Clay is used as a binder to ensure the strength of the granules before firing. Clay is a natural aqueous aluminosilicate with various impurities that, when mixed with water, is capable of forming a plastic dough, which, after roasting, is necessarily transformed into a stone-like state. The clayey matter with particle sizes less than 0.005 mm consists mainly of AlaOa 2SI02 2I20 kaolinite and its related minerals - montmorillonite AteOs 4SI02 pН20, halloysite x х25Ю2 4Н20.

The lab is prepared as follows.

w

Yo

VI co

ck

Waste of sugar production of dispersion of 10-12 thousand cm / p, ash and slag waste GRES fraction 0-5 mm and clay mixed for 5 minutes.

The mixture is shuttered with water and pellets with a diameter of 10-15 mm are formed from the obtained plastic dough, which are first hot dried at 200 ° C for 2 hours and then roasted, for example, in a muffle furnace at 800-850 ° C within zh.

When the pellets are fired, unburned coal contained in ash and slag waste is used as a component of fuel, thereby reducing energy consumption.

The reduction of energy consumption is also provided by the following factors. In the proposed production technology, fine fraction granules of a fraction of 10–15 mm containing highly dispersed lime are subjected to baking. Heating of these granules to the firing temperature takes place in a much shorter time than using lumpy limestone. In addition, the firing temperature of highly dispersed limestone may be lower than in traditional technology, i.e. 800-850 ° C instead of 1100-1200 ° C.

In determining the composition of the charge for the manufacture of granules, the content of calcium carbonate CaCO3 in the filter press sludge of sugar production (average 80%) and unburned tolly in ash and slag waste of the hydroelectric power station (average 14%) is taken into account.

The composition of the mixture to obtain a lime component in the binder is listed in Table 1.

The finished product is mixed with the required amount of silica sand and rubble and shut off with water. Further ready

The concrete mix is placed in forms with a 10 cm edge and compacted on a laboratory vibroplatform, kept under laboratory conditions for 3 hours, then steamed in a mode of 2 + 10 + 2 hours.

The finished specimens are tested for compressive strength one day after steaming. The test results are shown in table 2,

From table 2 it can be seen that the compressive strength of samples - cubes with a 10 cm edge, made on the basis of the proposed tamper, is not inferior to the strength of similar samples made on the basis of the known tamper.

Table 3 gives the heat consumption for limestone burning. From Table 3 it can be seen that to produce 1 kg of lime by burning granules from sugar production waste, ash and slag waste from a state district power station and clay at 800-850 ° C, heat is required 485 kilocalories less than it is required by traditional calcination technology at 1000-1100 ° C, which was taken in the manufacture of a live by a known method.

Claims (1)

Claims of a method for producing a binder, including calcining a carbonate-containing component, grinding with gypsum, followed by mixing with Portland cement, characterized in that, in order to reduce energy costs, filter press precipitate of sugar production is used as carbonate-containing component, which is mixed before calcining with ash and slag waste and gl-. Noah at a ratio, respectively. wt.%: 22.5-54 - 35-60 - 11-17.5, moistened, granulated, and calcined at 800-850 ° C. table 2 Table 3