381-21-6913-944

grejac@stcable.net

www.grejac-komerc.co.rs

MADE IN

S E R B I A

Melting furnaces for Al and other metals

Furnaces for thermal treatment of metals

Furnaces for porcelain, ceramics, glass

Flow furnaces, panel furnaces, dryers

Anti-corrosive protection

Regulation, measurement, management

CompanyGrejač-komerc doo is a small company from Serbia which was founded in 1991 and is engaged in independent design, production and trade of industrial casting furnaces and furnaces for thermal processes, driven by automatic, semi-automatic and manual systems of regulation and measurement.

TrendsConstant commitment, innovation, acquisition of knowledge and experience in the field of thermo-technics, as well as market knowledge and monitoring, has set us high on the scale

of the company’s stated area. This testifies to the fact that our furnaces and other systems are exported to Slovenia, Croatia, Bosnia and Herzegovina, Austria, Germany and other countries. The number of over 450 produced ovens and other thermal process devices is a very good indicator of the quality of our products and our position in the global market.

Quality and precisionAll of our products and systems are manufactured from top-quality materials required by technological processes and are adapted to the needs of customers. Control equipment is the most advanced devices in the field, which all in combination makes us producer of very precise systems for thermal processes in the casting industry, facilities for the metal processing, anti-corrosive protection and others.

SupportTechnical support, delivery of parts and necessary maintenance are part of our professional attitude towards old and new customers.

INTRODUCTION

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Stationary furnace for aluminum, zinc alloys and other non-ferrous metals have been widely used due to their practicality, light mobility, small dimensions, the type of energy used to heat the furnace, and the low cost of the product.

These stoves can use energy products such as gas, electricity and oil, in accordance with the desire, the need and the ability of the buyer.

The working temperature of the furnace is 900°C, while the maximum temperature is 1,200 ° C.

The furnaces have systems for regulating and monitoring the temperature of the furnace crucible and the temperature of the dissolved metal.

Stoves using electric or flame panels are furnaces with maximum energy efficiency. They are ideal for melting metals and maintaining melted metal due to low energy consumption. In the case of electric stove furnaces, thyristor controlled power is installed, which in the process itself make the stove extremely efficient.

Our technicians are always available for help when choosing an adequate energy source in order to maximize the energy efficiency of your process.

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STATIONARY FURNACES FOR AL AND ZN ALLOYS

Model T(max °C) Crucible Capacity

(kg Al)Installed

power(kW)

Dimmension(ŠxDxV / mm)

Mass(kg)

SLP 1 1.200 BU 200 200 24 1.100x1.100x1.000 1.100SLP 2 1.200 BU 300 300 36 1.200x1.200x1.150 1.400SLP 3 1.200 BU 350 350 40 1.200x1.200x1.300 1.650SLP 4 1.200 BU 500 500 65 1.420x1.420x1.350 2.500SLP 5 1.200 BU 600 600 74 1.420x1.420x1.400 2.700SLP 6 1.200 BU 800 800 100 1.550x1.550x1.500 3.000SLP 7 1.200 BU 900 900 110 1.550x1.550x1.550 3.300

Gas stoves are different in relation to electric furnaces in the implementation of technical solutions. The buyer has the option of selecting a burner.

Burnt gases exit from the furnace laterally, which is technically proven to be a better solution, but these gases can also be produced directly next to the oven cover.

With all the ovens, the panels are in a proper layout. They are made of vibrated thermal concrete (without airbags in concrete), which allows extremely high heat accumulation, i.e. long-lasting and uniform thermal radiation. The connectors on the panels are made of twisted Cr-Ni wire, which is a condition for the longevity of the panels themselves. The furnaces have ventilation openings on the formwork.

The furnace cover is characterized by a simple and functional solution, which enables quickly opening, using the solution and closing the furnace.

The probes in the stove are positioned for easy temperature measurements of the panels (fixed)and the solution (sinked) which enables greater process autonomy. The connection with the command cabinet enables the user to quickly and easily use the furnace. The command cabinet itself is easy for use and parameters of the technological process can be easily set, followed and documented whole or particular.

Maintenance of these furnaces and replacement of parts is such that each segment can be reached easily, which allows fast delivery of the device to a functional state.

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GAS FURNACES

Energy Energy value(kcal/m3)

Natural gas 9.000Propane 22.000Butane 28.000

STATIONARY FURNACES FOR AL AND ZN ALLOYS

The tilting furnaces that we produce are fully automated, easy to handle.

They are made in octagonal, circular or rectangular form. The circular or octagonal concept guarantees proper distribution and utilization of energy, as well as the easy outpour of dissolved metal together with an aggregate immediately adjacent to the furnace. The hydraulic system with two (if necessary and more) cylinders allows easy tilting of the furnace, safe handling of the solution, which ensures safety to technicians.

These stoves can use energy of gas, electricity and oil, in accordance with the desire, the need and the ability of the buyer.

The operating temperature of the furnace is 900 °C, while the maximum use of electricity and gas as energy is up to 1,200 ° C, and oil as a fuel is up to 1,300 ° C.

The furnaces have systems for regulating and monitoring the temperature of the furnace crucible and the temperature of the dissolved metal.

Stoves that using electric and flame panels are furnaces with maximum energy efficiency. They are ideal for melting metals and maintaining melted metal due to low energy consumption. In the case of electric stove furnaces, thyristor controlled power is installed

Burnt gases are exit from the furnace laterally, which is technically proven to be a better solution, but these gases can also be produced directly next to the oven cover.

TILTING FURNACES

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Model T(max °C) Crucible

Capacity (kg) Gas burner -- installed power (kW)

Mass(kg)Al Cu / CuSn

NP 1 1.200 TP 287 180 950 250 1.700NP 2 1.200 TP 412 330 970 300 2.100NP 3 1.200 TP 412H 370 1.200 300 2.200NP 4 1.200 TP 587 570 400 2.500NP 5 1.200 TP 800 800 400 3.000

Tilting furnaces -energy gas

Tilting furnaces -energy electric power

Model T(max °C) Crucible

Capacity (kg) Electric heaters -- installed power (kW)

Mass(kg)Al Cu / CuSn

NP 1 1.200 TP 287 180 950 24 1.500NP 2 1.200 TP 412 330 970 30 1.800NP 3 1.200 TP 412H 370 1.200 30 1.800NP 4 1.200 TP 587 570 74 2.400NP 5 1.200 TP 800 760 100 3.000

Trough tilting furnaces can use electricity and gas as energy. It is characterized by a trough outpoured from refractory concrete, which is located inside the furnace. The trough can be made in larger dimensions (volume) then the dimensions offered by the stove with standard crucibles, which greatly increases the capacity during the casting process.

They are made as:       - one-chamber and    - two-chamber

Single-chambered tilting furnaces are used when casting Aluminum as a secondary raw material.

Two-chambered troughs are used as central casting furnaces. In them, the first chamber is used for the primary Aluminum melting, while the second chamber is used to pour the solution. As one-chamber, and two-chamber furnaces characterized by the possibility of melting large quantities of raw materials.

Trough tilting furnaces use one burner.

Specific weight of Aluminium: 2,71 kg / dm3.

TILTING FURNACES

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ModelTrough

capacity(kg)

Solution quantity

(kg/h)

Furnace mass(kg)

NKP 1 500 150 4.400NKP 2 750 200 4.800NkP 3 1.000 300 5.100NKP 4 1.500 500 5.500

The aluminum heat treatment furnaces are made in two basic designs: chamber and flow furnaces. The principle of functioning is similar.

Batch input can be manual, semi-automatic and automatic (on wagons, forklifts, etc.). Automatics can control the raising of the batch, opening the door, etc. Our technicians will help you in selecting a furnace with accompanying equipment that would fit your process.

After entering the batch, or the material being processed thermally, the automatic process starts.

All our heat treatment furnaces have a system of automatic process management characterized by ease of use, with the option of monitoring and documenting the process. A large number of temperature changes can be set/entered, which allows the process to run smoothly, from heating or to temperature maintenance.

All furnaces can be produced to use electricity or gas as energy sources. Thyristor power supply guarantees lower consumption, for electrically heated furnaces, and easier process control (heating, cooling, maintenance ...) with software management ( forming of the heating curve), as well as the unique way of transmission, maintenance and control of heat in our furnaces, reduces energy consumption.

The operating temperature of these furnaces is up to 530 ° C ± 2 ° C, or the set temperature varies from the type of alloy that is thermally treated.

All of the above guarantees reliability, safety for operator technicians and productivity enhancement.

The monitoring of the process, with our modern devices, can be documented and used for later comparison of work results, further analysis and so, which can improve the process and further business in relation to the processes performed in the furnaces.

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THERMAL PROCESSING OF ALUMINIUM

In the furnaces we make, all thermal processes for steel (annealing, hardening, release, improvement) can be performed. The heat treatment furnaces for steel are made in the following versions:

1. Chamber furnaces - small2. Chamber furnaces - large3. Chamber furnace with wagon4. Folding furnaces from the panel5. Flow furnaces

The furnaces can also be produced in a protective atmosphere, and when are used for annealing they have stainless steel chambers.

Batch input can be manual, semi-automatic and automatic (on wagons, forklifts, etc.). Automatics can control the raising of the batch, opening the door, etc. Our technicians will help you in selecting a furnace with accompanying equipment that would fit your process.

After entering the batch, or the material being processed thermally, the automatic process starts.

All our heat treatment furnaces have a system of automatic process management characterized by ease of use, with the option of monitoring and documenting the process. A large number of temperature changes can be set/entered, which allows the process to run smoothly, from heating or to temperature maintenance.

All furnaces can be produced to use electricity or gas as energy sources. Thyristor power supply guarantees lower consumption, for electrically heated furnaces, and easier process control (heating, cooling, maintenance ...) with software management ( forming of the heating curve), as well as the unique way of transmission, maintenance and control of heat in our furnaces, reduces energy consumption.

The operating temperature of these kilns is up to 1,150 ° C ± 2 ° C, or the set temperature varies from the type of thermal process that is applied.

All of the above guarantees reliability, safety for operator technicians and productivity enhancement.

The monitoring of the process, with modern devices, can be documented and used for later comparison of work results, further analysis and so, which can improve the process and further business in relation to the processes performed in the furnaces.

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THERMAL PROCESSING OF STEEL

Panel furnaces for thermal processing are a unique product on the market and they were created as a need for users for non-standard batches, for users who thermally process semi-finished products of different dimensions, variable quantities of batch, technical characteristics of the factory space in which the furnaces should be stored etc. For the above reasons, the customer is allowed to assemble the panels and change the working volume of the furnace, depending on the needs that occur in the production.

All this has enabled the user to set up energy consumption according to the needs of the given process, to adjust the furnace to its specific process.

Panel furnaces can quickly change the shape of the furnace, for example, a “vertical” oven for specific batch can be made very quickly to a “horizontal” oven. Change makes the consumption of energy products adjustable for precise production, and can easily adjust the furnace to your needs of the current process.

The management and software used is user-oriented and it is very easy on the control box to change the working conditions of the process, memorize more processes, and quickly set the process conditions as required.

Our technicians are always available for help when selecting the appropriate panels that match the combination of your processes.

PANEL FURNACES

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Flow furnaces for thermal treatment are an important segment in processes where we have constant cycles of process time.

They can be applied in drying, preheating, improving, burning, vulcanizing and other processes. They are also suitable for batches that have specific and / or small shapes.

The batch can be added manually or sprayed automatically onto an endless strip of flow furnaces. Strip speed, process curve, as well as monitoring and later process documentation are performed automatically via software, where time and temperature cycles can be easily defined.

The furnace dimensions correspond to the customer’s requirements, while the furnace cover can be lowered manually or automatically over an endless strip.

Endless strip is made of materials that correspond to the thermal process and the type of batch to be processed, both by type of material and by shape and dimension. It can be of full material or as a net. The bandwidth is defined and can be changed by the segments of the working zones within the furnace, depending on the set process conditions.

As other furnaces for thermal treatment energy is buyers choice: electricity and gas can be, both with direct and indirect flame.

The maximum temperatures that can be reached are up to 1,150 ° C.

The basic conditions that can be set are:

- bandwidth- uniformity of temperature- operating temperature- process curve- process speed- weight of the batch- time cycles- the charge and discharge time of the batch- other user requests.

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FLOW FURNACES

Dryers are used in processes where it is necessary to reduce the amount of moisture in and on the product. Depending on the quantity of the product and the type of material from which it is made, the dryers will have a different technical and technological solution in terms of the appearance and manner of the drying process.

Due to all of this, our dryers have found application in various fields in the industry. They are used in technological processes in the food and agricultural industry, as part of the chemical, metallurgical industries and in laboratories.

Heat control is automated, guided by software.

When choosing a dryer, it is necessary to pay attention to the factors related to the type and quality of the dried material, the technological requirements in the process itself, the production requirements and the final quality of the product that is required.

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DRYERS, PAINTING LINES ...

Painting lines – flow lines for electrostatic painting have found their application in the process of automatic painting of large quantities of products. They are characterized by the uniform quality of the application of protective material (paint, plastic, etc.) glossy or matt-free surface, absence of mechanical impurities on the product, fast drying, lack of moisture, which contributes to faster process completion and quality final product.

In the process, the speed of painting, the amount of paint application, furnace temperature, amount of remaining color in the tank, can be defined and monitored, also the other needs of the process that the customer can request.

Porcelain and ceramic ovens are intended for the drying and thermal process of porcelain and ceramic products, as well as processes of various sintering. They are produced as chamber and as hobby furnaces and use electric energy as source.Chamber furnaces are made in several dimensions, according to the dimension of the customer requires. The furnace interior is made of materials that are not carcinogenic and which do not transmit harmful effects on the batch. The distribution of heaters is on the walls of the furnace, which causes an even distribution of heat. It allows the products to dry and bake which reduce the chance for firing or deforming of the products. Heat control via software enables precise operation and process monitoring. Maximum operating temperatures are 1,300° C. In the case of large-scale furnaces, models with wheelchair have heaters in themselves.

The hobby furnaces are made of circular or octagonal shape, of small dimensions. They are suitable for manual manufacture, artists and hobby masters.These ovens are easily mobile, easy to operate and use and these are suitable for single product or fewer series production.

Laboratory furnaces are intended for thermal testing in laboratories. They are mostly used in food, chemical, rubber, plastic industry ...The oven is made of decorative stainless steel or material by the customer’s choice. Furnaces are produced in three models, but other dimensions are also required upon request.The maximum operating temperature for laboratory furnaces is up to 1420 ° C, on request.Laboratory stoves have the ability to connect to a PC, to have software for process monitoring, as well as documenting or printing data.

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FURNACES FOR PORCELAIN, CERAMICS ANDLABORATORIES

Model T(max °C)

Useful area(w l h / mm)

Outer dimension (w l h / mm)

Volume(l)

Power(kW)

Consumption (kW / h)

Voltage (V)

Mass(kg)

MP 1 1.100 130x80x170 400x490x400 1,8 1 0,45 220 14MP 2 1.150 200x120x300 500x500x500 7 2,7 1,3 220 22MP 3 1.150 200x200x300 600x700x600 12 4,5 1,4 3x220 36

Model T(max °C)

Useful area (ŠxDxV / mm)

Volume(l)

Power(kW)

Mass(kg)

P 125 1.320 450x600x450 125 9 280P 200 1.320 500x720x530 200 15 350P 300 1.320 550x780x700 300 20 450P 450 1.320 600x1000x750 450 30 720P 650 1.320 600x1000x1100 650 40 875

Model(hobby)

T(max °C)

Useful area (фxV / mm)

Volume(l)

Power(kW)

Mass(kg)

H 60 1.100 400x500 60 3 500

Anti-corrosion protection is a very important segment in metal processing. It represents the electrochemical protection of the metal surface, which due to technological needs is exposed to aggressive (corrosive) working environment.

This type of protection is almost mandatory in environments where there is a high amount of moisture, fog, oxidation risk, as well as environments of saturated air with other agents (eg, chemical substances, etc.).

Depending on different technical and technological processes, we are producing systems for anticorrosive protection of metal surfaces with a layer of nickel, zinc, chromium and other.

Depending on the needs of the products, complete lines or segments, that is, elements that are defined in the customer’s request.

Galvanic heaters represent specific heating elements that have found their application in other technological processes, in addition to anti-corrosive protection. They are used to heat mediums which are aggressive according to the heat source material.

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ANTI-CORROSION PROTECTION - HEATERS

Galvanic heater - table

HeaterNominal

lenght (mm)

Minimal sink

(mm)Power(kW)

Voltage(V)

1.1001 400 350 0,5 2201.1002 400 350 1,0 2201.1003 640 490 1,2 2201.1004 640 490 1,5 2201.1005 640 490 1,8 2201.1006 800 650 1,5 2201.1007 800 650 1,8 2201.1008 800 650 2,5 220/3801.1009 1000 850 2,5 220/380

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Probes and thermocouples are used for precise temperature measurements in the chemical, metallurgical, food processing, rubber, plastics industry etc.Measurement range is -50 to 1600 ° C.

Thermocouples are produced in wire thickness of ø3.26 mm. For all thermocouples, the “A” connection head according to DIN 43729 (SILUMIN) is supplied.

We also produce nonstandard probes and thermocouples where the customer delivers either a sample or sketch for making.

When placing the customer’s request, the number of thermocouples (1 or 2), ie the thickness of the thermopar (0.5 mm or 0.35 mm wire) must be specified.

We produce and coil thermoelements in the lengths 330, 500, 570mm.

Thermoregulation is an important segment in the systems we produce. The accuracy is defined by the technological process and the customer’s request. This allows us to offer adequate thermoregulation elements so that the client and user in the production process can more easily define, control and monitor the process, and finally document the obtained parameters.

These devices are a prerequisite for quality guidance, tracking and documenting processes, as well as later precise analyzes.

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PROBES, THERMOCOUPLES, THERMOREGULATION

The software management system used in the processes on our devices represents an optimal combination of a large number of components that have proven to be easy to set, control, track and document.

The use of the software is organized in such a way that the user who inputs and the user who reads can move through the program and data without difficulty.

In everyday use, the following product features are highlighted:    - very simple navigation;    - direct display of all data;    - possibility of exporting data for further processing and analysis on PC;    - possibility of setting up a touch panel.

SOFTWARE

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FURNACE

Thermocouples

Controler

Manage and documentation

B A T C H

2019. Grejač-Komerc doo team * photos are property of Grejač - Komerc doo Serbia front paage idea http://www.freepik.com

GREJAČ-KOMERC D.O.O.

Novosadska 110 - 21220 BečejTel: +381 21 6913 944Fax: +381 21 6915 473Mob: +381 63 504 260

E-mail: grejac@stcable.nethttp://www.grejac-komerc.co.rs/