RU2613701C1 - Method for organomineral binder production - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: method for preparation of an organic-binder comprising obtaining of a peat and water mixture, mixture heating, cavitation dispersion and finished product cooling. Cavitation dispersion is made by flow processing of the peat and water mixture and by ultrasound at low frequencies ranging from 20 to 25 kHz.

EFFECT: reduced labor and increased productivity.

2 cl

Description

The method of obtaining organic binder

The invention relates to the biochemical industry, in particular to a method for producing a building binder composition from organic raw materials and may find application in the construction industry.

Known methods for producing a binder by mechanical impact on the initial peat mass, with its further processing together with water and obtaining a homogeneous mass at the output with the manifestation of the properties of the binder material.

A disadvantage of the known methods is that the mechanical effect on the initial solution is carried out for a long time, and the homogeneous mass formed at the exit has low binding properties.

A known method of producing a binder, including grinding peat mass by abrasion under the action of shear and normal mechanical loads / RU 2041185, C04B38 / 00, 1995 /. A distinctive feature of the known method is that the abrasion of the peat mass of operational humidity is carried out in the mode of shear loads of 50-200 N and normal loads of 50-500 N at 60-100 ^o C in the working volume of the mill installation to obtain an aqueous dispersion of peat particles with a size of approximately equal to 5 microns. The disadvantage of this method is its high energy intensity associated with the need for grinding peat in a rotary inertial mill (ROME). For example, a RIM-350 mill with a productivity of 30-200 kg / h of a finished binder peat emulsion consumes 7.5-15 kW of electricity, which leads to a high cost of the final product.

The closest in technical essence to the claimed is a method of obtaining a structured organomineral binder, including at least a single cavitation dispersion of a mixture of peat and water / RU 2529619, C22B1 / 244, 2014 /. This technical solution is selected as a prototype. A distinctive feature of the prototype is that the mixture is dispersed at a peat to water ratio of 1: 4-1: 4.5 and the dispersion is carried out until the mixture reaches a temperature of 80-90 ° C, which is then cooled to room temperature to obtain the finished product.

The disadvantages of the prototype include high complexity and lack of productivity. So to get one ton of the finished product you need from 1.5 to 2 days.

The authors solved the problem of creating a method for producing an organic mineral binder devoid of these disadvantages.

The technical result is to reduce the complexity and increase productivity.

To solve the problem, as well as to achieve the claimed technical result, a method for producing an organic-mineral binder is proposed, which includes obtaining a mixture of peat and water, heating the mixture, cavitation dispersion and cooling of the finished product. A distinctive feature of the proposed method is that cavitation dispersion is carried out by flow treatment of a mixture of peat and water with ultrasound at low frequencies in the range from 20 to 25 kHz.

Additionally, it is proposed to heat the mixture before dispersion to a temperature of 65 - 75 ° C.

Additionally, it is proposed to obtain a mixture of peat and water with a moisture content of 75 to 85%.

It is also proposed that ultrasonic treatment of the mixture be carried out with a specific radiation power of 180 to 200 W / l⋅min.

The implementation of cavitation dispersion by flow treatment of a mixture of peat and water with ultrasound at low frequencies in the range from 20 to 25 kHz can increase the productivity of the method and reduce its complexity.

The method is as follows.

Peat is diluted with water to the required humidity. The resulting aqueous suspension is heated and then passed through a flow-type ultrasonic reactor. After passing the water-peat suspension through an ultrasonic reactor, the latter acquires binding properties.

An example of the method

High decomposition lowland peat with a particle size of not more than 5 mm was diluted with water to 80% humidity. The resulting aqueous suspension was passed through a flow-through ultrasonic reactor with a frequency of ultrasonic vibrations of 22 kHz with a power consumption of 3200 W (generator power - 1000 W, heater power - 2200 W). In the working volume of the ultrasonic generator, the water-peat suspension was directed heated to a temperature of + 70 ° C. The speed of suspension through the ultrasonic reactor is 5 liters per minute. The outlet temperature reached + 80 ° С. After cooling, a gel-like homogeneous paste of black color with a slight plant odor was obtained: acidity (pH according to KCl) - 7.3, the size of organic peat particles 3 - 5 μm, density - 1200 g / l, electrical conductivity - 1.180 mOhm / cm.

The application of the method will improve the productivity of obtaining a binder, for example, 2 times with an increase in the cost of equipment by only 25%.

Claims (2)

1. A method of obtaining an organic mineral binder, including obtaining a mixture of peat and water, heating the mixture, cavitation dispersion and cooling the finished product, characterized in that the mixture is heated before dispersion to a temperature of 65-75 ° C, cavitation dispersion is carried out by flow treatment of a mixture of peat and water ultrasound at low frequencies in the range from 20 to 25 kHz, and the processing of the mixture with ultrasound is carried out with a specific radiation power of 180 to 200 W / l · min 2. The method according to p. 1, characterized in that a mixture of peat and water with a moisture content of 75 to 85% is obtained.