Foundry operations

Pipe-line valves by casting method are produced on our main production site – PJSC ARMAPROM.

Main technologies applied on the foundry:

• Technology of electric melting of steel and alloys in electric arc furnaces and induction furnaces,
• Technology of gas-oxygen refining of steel in converter,
• Shell mold casting,
• Hardening Таr-Sand Process,
• Technology of heat treatment of castings

For most meticulous – Scheme of production process in Foundry №1 of PJSC ARMAPROM 

For the rest people briefly: metal is melted in electric arc furnaces ДСП-3М (with capacity up to 5tn) or in smaller furnaces – 700-kg induction furnaces. In case two stage (duplex) process is applied, after electric arc furnace metal is additionally melted in electric converter.  The sense of additional second melt is in possibility to use technology of gas-oxygen refining of steel (GOR): blowing boiling metal with inert gasses we achieve its purification from slag and impurities, which guarantee required chemical composition of steel with significant bonuses: such steels have unique chemical and mechanical properties, and pipe-line valves made of such steels efficiently work in chemically active media, aggressive and difficult conditions of operations.

GOR converter is equipped with computer system of control based on blow mode controller produced by Siemens. Chemical composition of metal on different stages of production process is efficiently controlled by emission spectrometer SPECTROLAB M (SPECTRO, Germany).

Technology of gas-oxygen refining allows manufacturing of special, acid resistant, especially corrosion resistant, heat resistant, precision, low carbon steels and also the so called steels of carbamide class  - with especially low content of carbon (not more than 0,01%), steels alloyed with nitrogen, sparingly alloyed steels, and also high quality steels for power stations (analogues of austenitic steel made by vacuum-arc remelt) – more than 90 steel grades in total.

More details about gas-oxygen refining of steel (GOR).

Pipe-line valves by casting method are produced on our main production site – PJSC ARMAPROM.

Main technologies applied on the foundry:

• Technology of electric melting of steel and alloys in electric arc furnaces and induction furnaces,
• Technology of gas-oxygen refining of steel in converter,
• Shell mold casting,
• Hardening Таr-Sand Process,
• Technology of heat treatment of castings

For most meticulous – Scheme of production process in Foundry №1 of PJSC ARMAPROM 

For the rest people briefly: metal is melted in electric arc furnaces ДСП-3М (with capacity up to 5tn) or in smaller furnaces – 700-kg induction furnaces. In case two stage (duplex) process is applied, after electric arc furnace metal is additionally melted in electric converter.  The sense of additional second melt is in possibility to use technology of gas-oxygen refining of steel (GOR): blowing boiling metal with inert gasses we achieve its purification from slag and impurities, which guarantee required chemical composition of steel with significant bonuses: such steels have unique chemical and mechanical properties, and pipe-line valves made of such steels efficiently work in chemically active media, aggressive and difficult conditions of operations.

GOR converter is equipped with computer system of control based on blow mode controller produced by Siemens. Chemical composition of metal on different stages of production process is efficiently controlled by emission spectrometer SPECTROLAB M (SPECTRO, Germany).

Technology of gas-oxygen refining allows manufacturing of special, acid resistant, especially corrosion resistant, heat resistant, precision, low carbon steels and also the so called steels of carbamide class  - with especially low content of carbon (not more than 0,01%), steels alloyed with nitrogen, sparingly alloyed steels, and also high quality steels for power stations (analogues of austenitic steel made by vacuum-arc remelt) – more than 90 steel grades in total.

More details about gas-oxygen refining of steel (GOR).

Molding department of the foundry produced molds for 

• Shell mold casting
• Hardening Таr-Sand Process,

For shell mold casting process department is equipped with five forming machines for production of shell molds and also shell cores.

In 2013 molding department that made molds for Hardening Таr-Sand Process was additionally equipped with mixers produced by company FAT (Germany) with working capacity of 20 tn/h and 5 tn/h of molding sand, which allowed to achieve the highest quality of casting confirming to European standards.  

Minimum weight of castings made by Hardening Таr-Sand Process – 1kg, maximum weight – 2500 kg. Maximum size of casting boxes (devices for molding sand that limit dimensions of the cast part) - 3000х2000х600 mm and 4400х700х400 mm.

Heat treatment department is equipped with high efficiency equipment for knocking out cores and cleaning castings. Also on this department there are four gas furnaces for heat treatment of products. Castings are cleaned from remains of molding sand and dross in shot blasting chambers of different volumes and efficiency.  

Beside body parts of pipe-line valves and wide range of shaped castings foundry №1 produces ingots for further forging or rolling and also ingots for production of tubular billets.

List of products made by foundry of holding PROMARMATURA pdf