RU2550641C1 - Mixing device of process line for manufacture of granulated crystalline glass materials - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: useful model is aimed at expansion of fractional composition of manufactured granules, at manufacture of spherical granules, at complex mechanization of the process line for manufacture of granulated materials on the basis of siliceous rocks (diatomites, gaizes, bergmeals), and also at decrease of prime cost of granulated foam crystalline glass materials. The process line for manufacture of granulated foam crystalline glass materials comprises the mixing device consisting of the manufacture unit for mixing and forming of raw material granules and of the manufacture unit for mixing and foaming of the raw material granules, fractionation and storage of ready products. The mixing device of the process line contains receiving and working bins with batchers, storage devices, a dish-shaped granulating mixer installed on the manufacture unit for mixture and formation of the raw material granules and located downstream the mixing granulator of high-speed type, the drum rotating furnace on the manufacture unit for mixture and foaming of the raw material granules. Besides on the manufacture unit for mixing and foaming of the raw material granules, fractionation and storage of ready products the closed system of process transport and ready product sorting is provisioned which consists of the continuous pneumotransport system which includes pipelines, discharge cyclones and fans. The use of such mixing device on the process line for manufacture the granulated materials has allowed to reduce average bulk density from 210 down to 180 kg/m³. The heat conductivity coefficient has decreased by 15%. The use of complex mechanization has allowed to decrease significantly energy consumption, raw materials costs per 1 m³ of ready products, lower prime cost of ready products.

EFFECT: improvement of equipment performance, decrease of costs of the line service, improvement of environment parameters of manufacture.

Description

The utility model relates to the production of building materials, namely to the production of granular materials on a silicate basis, used as aggregate, in particular, light and very light concrete, as well as for bulk heat and sound insulation.

From the prior art, the “Integrated processing line for the production of granular insulating material” (patent for utility model RU 126328 U1) is known, including a preparation site for a silica-containing component, containing silos for silica-containing rock, sequentially installed coarse and fine grinding devices and grinding equipment located in parallel an alkaline component preparation section, containing coarse coarse and crushing and grinding equipment, a mixing and molding section for raw granules, a molded granule dryer, a kiln, a cooler, a classifier, storage bins and a finished product warehouse, and the line is equipped with a silica rock dryer installed on the silica component preparation area and connected to a device for coarse grinding, as a grinding equipment, a dry grinding attritor is installed in the preparation area of the silica-containing component, and alkali in the preparation area of component attritor wet grinding, the area of mixing and molding is installed mixer-granulator-speed type, the attritor connected by means of metering stations with mixer-granulator, and at the site of preparation of the alkaline component is mounted storage hopper crushed recycled coupled to the attritor dry grinding.

The disadvantages of the known production line are: the inability to obtain granules with a diameter of more than 2-3 mm, as well as the irregular (non-spherical) shape of the granules, which is associated with the features of a high-speed mixer-granulator.

The limitation of the diameter of the granules increases the average bulk density of the product, which significantly increases its cost, and also reduces the operational properties of products made on the basis of the product - granular material, in particular, their thermal resistance.

The irregular shape of the granules, preventing their mutual movement during drying and foaming, contributes to their adhesion during production.

In addition, the well-known technological line has not solved the problem of complex mechanization of the movement, sorting and storage of finished products, as well as reducing the dustiness of workplaces during processing, in particular, mixing during packaging and packaging of finished products.

The technical problem is:

- in expanding the particle size (fractional) composition of the product due to the production of granules with a diameter of more than 3 mm;

- in expanding the range of granular, in particular, foam glass materials;

- in the approximation of the shape of the granules to spherical, which improves the technological properties of the semi-finished product (raw granules) and the final product.

- in the complex mechanization of cooling, mixing, sorting, storage and packaging of finished products by using the system of technological pneumatic transport of finished granules, separated from the external environment, and equipped with a dust removal system.

The technical result from the use of a mixing device in the production line for the production of granular foam glass materials consists of:

- expanding the granulometric assortment of finished products due to the production of both small and large fractions (from 0.5 to 20 mm);

- improving the quality of the granules by increasing their strength and reducing water absorption;

- reduce the gross cost of granular materials due to large fractions and reduce their bulk density;

- improving the consumer and technological properties of granular materials, in particular, workability and ductility, achieved due to the spherical shape of the granules;

- improving the technological and operational properties of products made using granular material, for example, the thermal insulation properties of light concrete and other building products, by reducing the density of the aggregate and increasing the degree of filling them with aggregate of different fractional composition;

- reducing raw materials and energy costs per unit of finished products, as well as reducing labor costs due to the complex mechanization of transportation and sorting, storage and packaging of finished products based on pneumatic transport.

The claimed technical problems are solved and the technical result is achieved due to the proposed mixing device of the technological line for the production of granular foam-glass materials, consisting of a preparation site for a silica-containing component, a preparation site for a binder solution, and from a production site for the finished product in the form of spherical granules, divided into two production units - block for mixing and molding raw granules and block for mixing and foaming raw granules, fraction and storage of finished products, while the preparation section of the silica-containing component contains sequentially installed: silo-containing rock receiving hopper, dryer, devices for coarse and fine grinding, storage bins of dry crushed raw materials, dry grinding attritor, consumables of crushed silica-containing component and batchers, preparation of a binder solution contains sequentially installed: silo feed hopper, coarse and fine devices grinding, storage bins of crushed secondary sodium-containing raw materials with batchers and grinding equipment in the form of a wet grinding attritor, as well as the storage capacity of a binder solution with a batcher; moreover, the feed hopper of the crushed silica-containing component and the cumulative capacity of the binder solution with the dispensers are part of the mixing device, which also includes: a unit for mixing and molding raw granules of the finished product production site in the form of spherical granules, containing a speed-type mixer granulator, cascadingly located behind it plate-mixer-granulator, dryer and storage hopper of molded raw granules, which is connected through the feeder-dispenser to the mixing unit and foaming raw granules, fractionation and storage of finished products, consisting of a rotary drum furnace, a storage bin for unfractionated granules, a classifier, storage bins for fractionated granular material, a finished product warehouse, while the mixing device of the line is equipped with a closed system for technological transportation and sorting of finished granular material , which includes: a continuous pneumatic conveying system, pipelines, unloading cyclones and valves Yator.

New in the utility model is that the mixing device of the technological line has the composition and layout of equipment optimal for achieving the goals, additionally contains a disk granulator installed on the block for mixing and molding raw granules behind a high-speed granulator mixer, and also contains a closed technological transport system and sorting the finished product installed on the block for mixing and foaming raw granules, fractionation and storage of finished products, and consisting from a continuous pneumatic transport system.

The cascade installation of high-speed and plate-type granulator-mixer allows stably producing spherical granules with a diameter of more than 3 mm, and also additionally pelletizing small fractions emerging from the high-speed mixer-granulator to a spherical shape. The closed system of technological transport and sorting of the finished, calcined product allows us to solve the problem of dust removal.

The realized line of continuous pneumatic transportation of bulk materials has no practical restrictions on the layout of the equipment, providing flexible adjustment of the production line and its adaptation to production facilities. The absence of rubbing parts (screws, bearings, etc.) can increase the life of the line and the reliability of its work by 5-7 times, which also affects the cost of the final product. In addition, pneumatic transport is used on the production line both for mechanization of loading and unloading operations and to increase the productivity of transportation systems, and for efficient mixing of granular materials, as well as to reduce energy consumption and metal consumption.

The drawing shows a General diagram of a mixing device as part of a technological line for the production of granular foam glass materials.

The preparation area for silica-containing component A, intended for processing silica-containing raw materials of quarry moisture, as well as solid raw materials (cullet, metallurgical slag, etc.), includes a receiving hopper 1, a drum dryer 2, a coarse grinding device 3 and a device for fine grinding 4 , storage bins of dried crushed raw materials 5, dry grinding attritor 6.

The preparation section of the binder solution B is intended for processing and dosing dry sodium-containing components, including silicate blocks, cullet, soda ash, sodium hydroxide (caustic soda), as well as for wet grinding and dissolution of the components to obtain a binder solution and its storage in the storage capacities.

Section B includes: a receiving hopper 7 for a silicate block, a coarse crushing device 8, a fine crushing device 9, a supply hopper 10 for crushed silicate block, soda ash, sodium hydroxide (caustic soda) and other sodium-containing components.

Consumable hoppers of sodium-containing raw materials 10, equipped with weighing batchers 11, provide loading of the attritor of wet grinding 12, where the dissolution and grinding of sodium-containing components is performed. From the wet grinding attritor 12, the finished binder solution enters the cumulative capacity of the binder solution 13, equipped with a stirrer and connected to a binder dispenser 14.

Mixing device B includes: a unit for mixing and forming raw granules B1 of a finished product production section in the form of spherical granules, consisting of a speed granulator mixer-granulator 15, cascaded with a plate-mixer granulator 16, consumables for bulk components 17 and bulk metering units components 18. The plate mixer-granulator 16 is connected to a dryer of raw granules 19, a storage hopper of finished raw granules 20.

The block for mixing and foaming raw granules, fractionation and storage of finished products B2 includes: a feeder-dispenser for raw granules 21, a rotary drum furnace 22, the outlet of which is connected to a pneumatic conveying system 23, which feeds the product into the storage bin of unfractionated product 24. The bin of finished unfractionated Product 24 is connected to a vibrating sieve (classifier) 25, connected to the input lines of the pneumatic transport system 26, the output lines of which are connected with storage bins fractionated finished products 27.

The mixing device of the technological line for the production of granular foam glass materials works as follows:

At the preparation site for the silica-containing component A, raw quarry silica raw material loaded into the hopper 1 is loaded into a drum dryer 2. The dried bulk material is fed into a coarse grinding device (for example, a jaw or cone crusher) 3 and then to a fine grinding device 4 (for example, roller crusher), after which the dried raw material, crushed to a size of 1-mm, is fed into the storage hopper 5 for storing dry crushed raw materials ready for grinding.

From the storage hopper 5, dried and finely divided raw materials (flaky trepeloid siliceous rock, cullet, metallurgical slag, etc.) are fed to the dry grinding attritor 6 to obtain a fine powder. From the dry grinding attritor 6, the ground powder components enter the storage bins 17 of the block B 1.

At the site of preparation of the binder solution B, a silicate block (glassy fused sodium silicate), which enters the receiving hopper 7, is subjected to coarse crushing on the device 8, fine crushing on the device 9 and enters one of the storage bins of the sodium-containing components 10. The other bins 10 enter prepared sodium-containing components, for example, soda ash or caustic soda.

To obtain a portion of the binder solution, the specified amounts of sodium-containing components and water, using the dosing system 11, enter the wet grinding attritor 12. After the wet grinding cycle combined with the dissolution of the silicate block, the finished binder solution enters the storage tank of the binder solution 13, equipped with a binder solution dispenser fourteen.

At the block for mixing and forming raw granules B1, the necessary portions of ground powder components from the supply hoppers 17 are fed through a metering system 18 into a batch type high-speed mixer-granulator 15.

At the beginning of the mixing cycle in the mixer-granulator 15, the powdered components are subjected to intensive dry mixing and crushing of lumps and aggregates of dry particles. After the dry mixing phase, a portion of the binder solution is introduced in an amount and with a concentration of dissolved sodium silicate, sufficient to obtain raw granules of a given chemical composition, into the working mixer, through the metering unit of the binder solution 14.

After unloading from the mixer-granulator 15, the mass enters the dish-shaped mixer-granulator 16, after which the granules are dried in a drum dryer 19 and then enter the storage hopper of the raw granules 20.

At the unit for mixing and foaming, fractionation and storage of finished products B2, the continuous batcher 21 feeds raw granules from the storage bin of raw granules 20 to a rotary drum furnace 22 with electric or gas heating, where the mixed granules are subsequently heated, foamed at a temperature of 750 to 950 ° C and partial cooling to a temperature of 500-650 ° C.

From the furnace 22, the finished foam granules enter through the continuous pneumatic conveying system 23 into the storage hopper 24 classifier 25, where the finished product is sieved into fractions.

After sieving by fractions, the granules, already as a finished product, are fed through the continuous pneumatic conveying system 26 to the storage bins 27 of the finished product, and after loading into soft containers (big bags), then they are delivered to the finished goods warehouse.

The granular porous material obtained on the mixing device of the technological line has the following technical characteristics:

Fractional composition of granules: - from 0.5 to 20 mm Bulk density (depending on granule size) - 140-400 kg / m3 The compressive strength in the cylinder according to GOST 9757-90 for a fraction of 5-10 mm - not less than 1.2 MPa for a fraction of 0.5-1.0 mm - not less than 5.0 MPa Volumetric water absorption - no more than 7% Bulk thermal conductivity - no more than 0.6 W / M ° K with bulk density 180 kg / mz

At the same time, the fractional composition of granular materials expanded, the yield of fractions of more than 10 mm increased to 50% or more, the shape of the granules approached spherical, and the average bulk density decreased from 210 to 180 kg / m3 due to an increase in the proportion of large fractions.

The thermal conductivity coefficient decreased by 15%.

The use of a mixing device of the technological line for the production of granular foam-glass materials with these technical properties allowed us to reduce energy costs by 35%, raw material costs per 1 m3 of finished products by 15%, and cost by 25%. The reliability of the equipment has increased, the cost of servicing the line has decreased, and the environmental performance of production has improved.

Claims (1)

A mixing device of a technological line for the production of granular foam-glass materials, consisting of a silica-containing component preparation section, a binder solution preparation section, and a finished product production section in the form of spherical granules, divided into two production blocks - a block for mixing and molding raw granules and a block for mixing and foaming raw granules, fractionation and storage of finished products, while the preparation area of the silica-containing component and it contains sequentially installed silica-containing receiving hopper, dryer, coarse and fine grinding devices, dry crushed raw material storage bins, dry grinding attritor, chopped silica-containing component consumable hoppers with dispensers, and the binder solution preparation section contains silica raw-material receiving hopper, device coarse and fine grinding, storage bins of crushed secondary sodium-containing raw materials with dispensers and grinding equipment in the form of a wet grinding attritor, as well as an accumulating capacity of a binder solution with a dispenser, moreover, consumable hoppers of a crushed silica-containing component and an accumulating capacity of a binder solution with dispensers are included in the mixing device together with a unit for mixing and molding raw granules of the finished product manufacturing site in the form of spherical granules containing a mixer-granulator of a high-speed type, a plate-mixer, granulator, located behind it cascadewise behind it, a dryer and a storage bin for molded raw granules, which is connected through a feeder-batcher to a unit for mixing and foaming raw granules, fractionation and storage of finished products, consisting of a rotary drum furnace, a storage bin for unfractionated granules, a classifier, storage bins for fractionated granular material, a warehouse for finished products, while the mixing device of the line is equipped with a closed system of technological transport and sorting of the finished granular material, in which includes a continuous pneumatic conveying system, pipelines, unloading cyclones and fans.

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