Method of producing structured organomineral binder

FIELD: chemistry.

SUBSTANCE: method of producing structured organomineral binder includes at least one-time cavitational dispersion of a mixture of peat and water in ratio of 1:4-1:4.5, respectively. Dispersion is carried out until the mixture reaches temperature of 80-90°C, followed by cooling the mixture to room temperature to obtain the end product.

EFFECT: preserving binding properties of the product for a long period of time during storage.

 

The invention relates to environmentally sound technologies for binder from raw materials of natural origin, namely from peat, and may be used in the briquetting materials, in particular for the production of fuel and technological briquettes from various fine materials of natural and artificial origin.

Binder (adhesive) properties of peat caused by the presence of humic substances. For the manufacture of peat technology products with astringent properties, a mixture of peat and water is subjected to various treatments to activate the action of humic substances. Mostly knitting receive the manufacturing of briquettes, which can be explained, apparently, by the fact that peat binder is not subject to storage and transportation.

Known, for example, a method of obtaining a binder, which is part of the method of manufacturing fuel briquettes (Patent RF №2195401, publ. 2002) [1]. To obtain a binder peat, shredded, grated, crushed in a wet environment, boil and turn into a homogeneous mass of a particle size of from 0.01 to 10 μm. To obtain the combustion of the briquettes in the weight of the binder is injected filler in the ratio by weight of 1:0.01 to 1:20, stirred at operational humidity from 3 to 97% and placed in a rigid mould, where it is subjected to controlled dynamics is a mini-loads with a certain frequency and force of the blows. Judging by the size of the particles obtained peat mass, the structure of the peat in the process does not change that it is not possible to talk about the high binding properties of the obtained binder.

A known method of manufacturing a binder, which is part of the way briquetting peat coke (SU # 30674, publ. 1933) [2]. Binder is prepared by processing a mixture of peat with water in a water colloid mill, resulting in a gain of peat emulsion, humidity which does not allow to use it as a binder for briquetting coke. The emulsion is subjected to dehydration to a certain percentage of moisture. The need for removing excess moisture from the peat emulsion requires special equipment, as well as time and labor costs.

A method of obtaining a binder in the form of 2-9% aqueous slurry of peat (SU # 1715829, publ. 1992) [3]. The method is used in the manufacturing process of briquetted fuel. Waste peat any size load in laboratory stock roll, add hot water, and mix to obtain a homogeneous mass. Obtained peat suspension is mixed with ground wood waste (sawdust or chips of size up to 15 mm) at 25±5°C for 3-5 min before the formation of a homogeneous mass, which is then formed into briquettes at the 0.04±0.01 MPa and 25±5C and dried at 100-130°C. Massin ro the l represents Chan, inside which rotates a cylinder supplied with steel knives. This apparatus is characterized by high energy consumption lack of effective grinding mass.

A method of obtaining the binder used in the process of manufacturing fuel briquettes (RU # 2413755, publ. 2011) [4]. Binder obtained from podocarpaceae mixture, which is at least once passed through disperser (cavitator) when the pressure drop across the dispersant 0.1·105 to 25·105 PA. As indicated in the description of this patent, the percentage of peat and water can be various depending on the design of the dispersant and drive power dispersant, although as described, the optimum ratio of solid peat and water is 1:2,6 respectively, in which the binder has the consistency of thin cream. Passing through the dispersant mixture is subjected to the cavitation treatment (high pressure thousands of atmospheres. The treated mixture is mixed with carbonaceous material and bitteroot by known methods. As the carbonaceous material can be used peat, sawdust, coal, all kinds of waste (in particular, litter) and their mixtures. In the example of the description of the patent [4] as such a material provides the peat.

The use of cavitation impeller for efficient grinding t is erday phase and mixing it with the liquid phase to obtaining a quality homogeneous mass is known. The principle of operation of such devices is based on the phenomenon of cavitation, which represents education of a liquid gas-filled cavities, or cavities, in the "collapse" are experiencing a shock wave, resulting in the destruction of solids and emulsified liquid. This process occurs due to the differential pressure generated in the apparatus. It should be noted that the conditions for the creation of cavitation different. In the description of the method [4] write about the pressures of thousands of atmospheres and high, several thousand degrees, the temperature. These data cast doubt on the possibility of realization of this method, since at temperatures above 100 the water begins to evaporate, and the peat - burning.

Thus, known methods for producing binder of peat are characterized by multi-stage, the need for additional special equipment, energy, and continuity with the subsequent briquetting process, excluding the application of the obtained binder for various technological processes.

The present invention is the obtaining of a binder, as the finished product, allowing you to use it for various technological processes while simplifying the production technology. The problem is solved in that a method of obtaining a structured organic binder including the em at least once cavitation dispersion of a mixture of peat and water, in this case, the dispersion is subjected to the mixture at the ratio of peat to water of 1:4-1:4,5, the dispersion mixture is conducted to a temperature of 80-90°C, the mixture was cooled to room temperature.

The stated ratio of peat and water in the range of 1:4-1:4,5 contributes to expiration of peat mixture in the dispersant, which provides fast heat it. The process of dispersion peat mixture, carried out in cavitation apparatus to a temperature of from 80 to 90°C, and cooling the mixture to room temperature yields a binder, which represents a colloidal system with a particle size of 2×10-4-2×10-6. Visually it is a jelly-like "pasta shell, which when cooled to room temperature is a structured organic ready-to-use product. Between the pasta and the vessel wall visually determined by the presence neizprotamas fluid unexplored nature, which, apparently, creates on the product surface film that protects the product from exposure to oxygen-containing environment and ensures binding properties for a long time. A new technical result achieved the claimed invention is to preserve the binding properties of the product for a long time while simplifying the technology it manufactured by Garrett, Borg is tion.

The method was implemented in the cavitation device, which is a pulsatile pump, the impeller of which has an internal cavity, equipped with blades and channels connecting the cavity with the outer lateral surface of the wheel (EN 2386471, publ. 20.04.2010,) [5]. The principle of operation of this apparatus is the following. On the outer side surface of the wheel has a vortex emitter, which on the outer side surface of the wheel is made tangential, tapering in the direction of the flow, slit-like channels, which are relative to the direction of rotation of the rotor have the front and rear walls, the front wall on the exit side of the liquid made the chamfer. During the rotation of the impeller of the processed fluid medium enters the inner cavity of the wheel, where interacting with the rotor blades, receives rotary motion. Under the action of centrifugal force, the flow receives a significant increment of radial velocity, depending on the frequency of rotation of the wheel and its diameter. When driving on narrow channels flowable medium receives an additional increase in speed due to centrifugal force, and by narrowing the cross-section of the channels. When you exit channels flowable medium through bevel directs the flow towards the predetermined rotation stake is but motion, and dramatically expanding the channel configuration, substantially changes the pressure in the processing environment, resulting in a powerful turbulent motion, accompanied by the phenomena of cavitation and intense emission of acoustic and ultrasonic energy.

In the presented examples illustrate the claimed method, use lowland with a high degree of decomposition of peat from the peat deposits Samarovskoe II No. 744 directory and map of administrative units, In-Pyshma, Sverdlovsk region. Peat was subjected to screening using vibrating screens with a cell of 5 mm to obtain a peat crumb size up to 5 mm To produce 1 ton of binder were weighed 200 kg obtained peat crumb. In example 1 took 800 l and for example 2 - 900 l of water. In pot-stirrer at room temperature, poured water and included the engine pulsation of the pump. In a moving stream of water portions were served peat. The dispersion was performed in one stage. In the process of dispersion measured the temperature of the processed mixture. When the mixture temperature 80°C according to example 1 and 90°C according to example 2, the treated mixture was poured into the intermediate tank for degassing and cooling to room temperature. After 1.5-2 days the product is ready for storage and transportation. The product has the appearance of a jelly-like paste brown who is a ready-to-use binder. Binder, manufactured in example 1, was tested company producing fuel briquettes. Was tested briquettes obtained by compressing the mixture containing 25% of the binder and Neftekamsk. The briquettes had a calorific value 31,045 GJ/tonne and was recognized as a fuel suitable for combustion in kilns cement plant. Binder produced according to example 2, was tested and metallurgical company. The test results show that the briquettes obtained from a mixture containing 20% structured organic binder and briquetted of sinter charge, leads to an increase of the vertical velocity of sintering, while the yield of sinter is increased, and the fines content of the class 5-0 mm decreases. Minimum storage binder according to preliminary data, is 2 weeks.

Thus, the claimed method allows to obtain a binder, as a finished product, allowing you to use it to get briquettes used in various technological processes while simplifying the production technology. Astringent can be produced and in terms of the technology of production of briquettes. The high content of humic substances in a given amount of binder and colloidal dispersion composition can bind, and then briquetting various small materials, such as sawdust, fines of drives the century of coal, detail of stone coal, peat, dust to dust, coke breeze, graphite and other

The method of obtaining structured organic binder comprising at least a single cavitation dispersion of a mixture of peat and water, wherein the dispersion is subjected to the mixture at the ratio of peat to water 1:4 to 1:4.5 and the dispersion is carried out to achieve a mixture temperature of 80-90°C, which is then cooled to room temperature to obtain the finished product.



 

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