Stockpiling technologies

SIA "Akonit" - your competence center for the transportation, stockpiling and handling of bulk cargo

Carefully selected and designed by our specialists, the equipment makes it possible to maintain the quality of the manufactured product throughout the entire cycle of storage and handling.

JSC "SIA" Akonit " has been a comprehensive supplier for many years of both technological lines and individual machines in the mining, cement, chemical industries, and port facilities.

The equipment produced by our company meets the high requirements of the customer and is designed for operation in hard conditions.

Homogenizing bridge stacker

The bridge reclaimer, moving in the longitudinal direction, reclaimes the stockpile with the help of a harrow moving from side to side, which knocks down the product at a natural slope angle under the scraper mechanism

Homogenizing excavator

This technology is designed specifically for sticky materials such as various types of clay, furnace batch, other products used in the agricultural, cement and ceramic industries.

Side type reclaimer

The technological solution with a side type reclaimer is cost-effective for small and medium sized industries, as it replace a grab crane technology.

Cantilever reclaimer

The main structure of the reclaimer rotates 360 degrees, moving along the rails in the longitudinal direction of the stockpile, it reclaims the material from the stockpile onto the undergrounf conveyor.

Semi-portal reclaimer

Semi-portal warehouses are the most common and flexible for storing products of different fractions and chemical composition.

Portal reclaimer

Engineers of SIA "Akonit" have developed several modifications, each of which takes into account the characteristics of the transported material, capacity and geometry of the stotage.

Bucket wheel excavator

The design of the rotor wheel and buckets makes it possible to develop lime and chalk quarries, work with highly abrasive products in industrial warehouses.

Screw reclaimer

Taking into account the warehouses of dome and longitudinal types, as well as silos, several types of screw reclaimers for mineral fertilizers, wood chips and agricultural crops have been developed.

Stacker reclaimers

Combined portal stacker-reclaimer is used when it is necessary to simultaneously load and unload a warehouse, this allows to reduce capital and operating investments.


Chevron's radial stockpiling and material reclaiming system ensures good mixing and homogenization of the product.


It is used in port facilities for coal handling, at metallurgical enterprises for storage of iron ore, hot-bracketed iron and other products.


The use of radial spreaders on rails or pneumatics with a lifting and retractable boom allows the formation of stationary and dynamic stockpiles.

Loop belt conveyor

The top loading of the warehouse is carried out by a retractable belt conveyor or a loop belt conveyor. The equipment is reliable and cost effective.

Luffing and slewing stacker

Stackers are of one or two boom construction with slewing and luffing mechanism with winches or hydraulic cylinders.


Cone Shell, Chevron, Window, Strata are the most common stockpiling methods. The layers are layed on top of each other in the direction of the stockpile, creating the effect of mixing the product. SIA "Akonit" manufactures technological equipment for stockpiling: stackers (inclined, rotary, double-boom), rail-mounted belt conveyors, loop tripper cars, mobile caterpillar and pneumatic spreaders.

The method is used when homogenization is not necessary. The first cone is formed to the upper level with a fixed position, after which the stacker moves and forms a new cone on the surface of the previous one. This continues until the warehouse is completely filled.
The chevron method results in segregation of the material when fine particles are in the central part of the stockpile, and large particles are on the surface and at the bottom of the stockpile. To ensure a better blending, it is necessary to reclaim the stockpile from the front side along the entire cross section.
This method prevents segregation and ensures even distribution of small and large particles throughout the stockpile. This type of material stockpiling can be provided by a luffing and slewing stacker. It is the most complex and maneuverable method.
The Strata method involves stacking in horizontal layers, alternating layers of different grades, and is preferred in cases where the reclaimer is working on only one part of the cross section, or in cases where segregation makes an open base of the stockpile unacceptable.

Reclaiming is of great technological importance. Reclaimers manufactured by SIA Akonit provide the necessary degree of material homogenization, constant productivity, combined with low operating costs and high equipment utilization. Our technical solutions are based on experience in various industries and meet the high requirements for energy efficiency, prescribed wear and optimal reclaimer weight.

Side cutting
In this method, the material is cut either from the side or from the end of the stockpile, which provides a better degree of product homogenization. Often used in the cement, lime and ceramic industries, in warehouses with dissimilar products.
Long terrace
Just like with the reclamation and pilgrim method, the stockpile is reclaimed in ledges or layers, but instead of moving the rotor wheel in an arc, the reclaimer moves along the entire length of the stockpile.
Slew terrace
The stockpile is reclaimed in a series of layers. The machine reclaims from the stockpile in a series of slewing arcs, moving in the long travel direction. Upon reaching the end of the stockpile, the action is repeated with a new layer in the opposite direction.
Pilgrim step
The stacked product is reclaimed in steps, starting from the top, each bench has the necessary distance to avoid material slump and collapse. This approach provides greater flexibility in stockyard space management and good blending.

Technologically, warehouses are divided into two types: homogenization and storage. Bulk materials storage is needed in case of failures in the transport system in the mines or pits, due to which the material cannot be shipped to the customer or submitted to production. Warehouse capacity varies from 7 to 45 days and is designed individually for each production line. Warehouses can be of a longitudinal and radial arrangement. The radial warehouse has a compact footprint. Longitudinal warehouse is used for large capacity and the possibility of expansion in the future.
For each type of a warehouse, we have developed special equipment with many design features, options and layouts.

Warehouses with high homogenization (averaging) of the product:
Continuous chevron stacking and reclaiming from the end increase the effect of homogenization (blending). Optimal use of space. This solution is used for limestone, coal and wood chips warehouses.
Bridge warehouse
The longitudinal stacking system involves working with two stockpiles. Efficient product blending. This solution is often used in closed warehouses in the cement industry, as well as in coal-fired power plants.
Excavator warehouse
The only homogenization method used for sticky products (clay, mixture, sand) laid using the window method. Widespread in the cement and ceramic industries. High storage capacity and easy installation directly under the roof of the warehouse.
Central warehouse
In this type of a warehouse, both mobile scraper reclaimers and central ones with underground conveyors are used. Differs in the minimum set of the equipment, scheme flexibility. It is widely used in potash warehouses of low capacity, including mines.
Side storage
It is for warehouses of average capacity. It is possible to stack different types of product in separate stockpiles. Loading and unloading are independent of each other. Storage capacity can be easily increased.
Portal warehouse (3 booms)
Large capacity warehouses with the possibility of stacking various types of product. Wide application for storage of mineral fertilizers in factories and ports. Flexible layout with the use of a stacker or a top loop tripper car.
Rotary warehouse
Combined with a stacker, high storage flexibility is provided, along with the possibility of simultaneous stacking and reclaiming operations in high-capacity warehouses. The scheme is applicable for coal ports, metallurgical plants and other heavy and abrasive materials.
Screw warehouse
Screw reclaimers provide fully automated reclaiming of materials with moderate to poor flow characteristics: wood chips, dry flour, chemicals, powders. It is used in domed and longitudinal warehouses, operates under blockage.

Universal reclaimers together with the conveyor transport of the warehouse are designed to provide a constant and uniform supply of the product to the technology. Kratzer cranes manufactured on modern equipment ensure the uninterrupted operation of the warehouse. A comprehensive supply of automated warehouse equipment guarantees high efficiency and low operating costs.

3D modeling
Manufactured equipment is designed in the 3D environment Autodesk Inventor Professional, which eliminates design errors, collisions, reduces delivery time and enables to work with the model in large BIM projects. With the help of Autodesk Inventor Nastran, structures are evaluated and calculated for dynamic and static loads, as well as checking: centers of gravity, wind loads, calculation of drive power, long-term wheel loads, stability during full movement. The design safety factor is taken according to certain loads and their combinations according to ISO5049.1.
Process guarantee
The main criterion when choosing a supplier of equipment is reaching a given performance. After designing, engineers simulate the process of particle movement in the Roky DEM software. The configuration of the transfer unit and the receiving table of the reclaimer is analyzed to prevent its blockage with the product and timely emptying without spillage. All positions of the inclination of the boom, the trajectory of the movement of particles and the nature of their impact on surfaces are taken into account, which gives an understanding of the wear resistance and service life of the linings. Variants of designs and characteristics, troughability of the receiving conveyor, speeds of the feeding scraper chain and the receiving conveyor, situations of maximum capacity and equipment overload are checked.
LIDAR scaner
Increased requirements for accounting for products in the warehouse require modern solutions, such as continuous inventory of products using laser or LiDAR technologies. Sensors installed on the structure of the warehouse or fixed on the reclaimer compare the 3D profile of the stockpile with the zero profile, providing technologists with quantitative and qualitative reports on the received, shipped and left product in the warehouse. Based on such data, the technological staff makes an operational decision both at the time of stacking and reclaiming of the product. The 3D warehouse scanning system is supplied both as part of stackers and reclaimers, and separately installed on existing equipment.
Interactive catalog
All reclaimers produced by Akonit have an interactive catalogue. The 3D model is disassembled "to the bolt" with one click of the mouse and the Client gets the opportunity to order any part by a unique number.

For kratzer cranes of third-party manufacturers, we can manufacture any spare parts according to the drawings of the Client, we also carry out 3D scanning of components with the subsequent development of design documentation and production.
Individual design for the client's warehouse. The equipment is designed both independently and by a European design institute with over 30 years of experience in this segment.
In addition to the complex supply of equipment, it carries out construction and installation; installation supervision, commissioning, and staff training as well. Modernization of equipment, reprogramming of existing reclaimers.
We supply: buckets, scrapers for the kratzer cranes; traction chains; chain-wheels; scraper boom set; running wheels and shafts; winches; control systems; cabins; software and more.
Optionally, we are ready to offer: technological 3D scanning of the warehouse; fire detection systems, smoke protection system; industrial safety expert review, etc.
The team of skilled engineers is ready to advise you on organization of warehouses as well as on design and use of reclaimers, other warehouse equipment