CHEPETSKY MECHANICAL PLANT - INJECTION MACHINES AND CORED WIRE FOR EXTRA

Central & Eastern
European Directory On-Line

| Business Directory | Business Gallery | Trading Point | Search | E-mail | Home || Education Directory |
| Budget Hotels | Cheap Hostels | Philatelic Directory | Selected: | English Language Courses | MBA & Business Courses |

JSC "Chepetsky Mechanical Plant" 427600 Russia, Udmurt Republic, Glazov, Belov Str., 7 Tel.: +7 (341-41)-724-15 Fax: +7 (341-41)-345-07 E-mail: post@chmz.udm.net and market@chmz.udm.net Internet address: http://www.chmz.udm.net

Injection machines and cored wire
for extra - furnace treatment of steel

One of the modern and promising production process of extra-furnace treatment of steel and cast iron is the process of cored wire injection with various fillings into the melt in the ladle. This method can be applied practically in any steel producing divisions regardless of steel-teeming capasity in order to perform final correction of metal chemical content, refining metal from sulpher and non-metallic inclusions and for changing of the content and the form of modification of the latter.
At JSC “Chepetsky Mechanical Plant” for the first time in Russia there was established manufacturing of mills for producing of cored wire and injection machines for injection of wire into the liquid metal in steel-teeming ladles.

**Technical data of the mill:**
Drawing force, kN	15
Diameter of finished wire, mm	8-16
Drawing velocity, m/s	0.2-0.3
Capacity ( at equipment utilization factor 0,5 and the mass of 1 running meter equal to 0,25) kg/h	45-67
Drive power, kWt	8

Cored wire production process provides permanent profiling of the original band in roll gaugees, followed by forming of the lock, reduction and reeling on of the finished wire into bundles ( inner and outer diameters of bundles are 550-600 and 800-1100 correspondingly), with mass 400-800 kg. The bundle can be reeled out without special devices.
Some types of injection machines for injecting of cored wire into the steel teeming ladles were designed and are now being produced at JSC “ChMP”.

**Technical data of two channel injection machine** **is the following ( 380 V, 50 Hz):**
Drive power, kWt	15
The rate of wire feed ( unstepwise), m/min	25 - 300
Pressure in pneumatic actuator, MPa	0,4 - 0,6
Diameter of applied wire, mm	8 -18
Programmable length of the wire, m	9999
Number of channels of wire feeding	2
Dimensions (length x width x height), mm	1670 Х740 Х100
Mass of injection machine, not more than, kg	2000

Cored wire

Cored wire consists of filling and metal jacket (Fig.1). Fillings represent the mixtures sufficiently uniform regarding content and seperate materials with particle dimensions not more than 2,5 mm. Metal jacket represents cold rolled steel band of Russian steel grade 08 кп with thickness 0,4-0,5 mm and width 45-65 mm.

Metal jacket provides the following functions:
- protects the filling from the influence of atmosphere and moisture when keeping and transporting and from oxidation when passing through slag
- provides the required rigidity of the wire
decelerates reaction of filling component with liquid steel which permits to control the depth of immersion of wire into liquid metal by means of changing of feeding rate and jacket thickness.

**Cored wire specification**
Filling agents	Diameter 11 mm						Diameter 16 mm
	Coil weight	Filler weight in coil	Coil. Inner D	Coil outer D	Length of wire in a coil	Filler weight in 1m	Coil weight	Filler weight in coil	Coil. inner D	Coil outer D	Length of wire in a coil	Filler weight in 1m	Coilheight
	kg	kg	mm	mm	m	g	kg	kg	mm	mm	m	g	mm
Si-Ca	450- -800	200- -350	545- -560	up to 1200	1500- -3000	100- -110	650- -900	350- -450	680- -695	up to 1500	1000- -2000	250- -300	720-760
SiCa+Ca (up to 80% per CA)	450- -800	200- -350			1500- -3000	100- -110	650- -900	350- -450			1000- -2000	250- -300
Al-Ca (60%-40%)	500- -700	200- -250			1500- -3000	100- -110	650- -800	300- -350			1500- -2000	150- -180
Cа-Al-Fe (40%-30%-30%)	500- -800	250- -350			1500- -3000	100- -125	700- -900	400- -500			1500- -2000	250- -300
Ca (grains)	500- -700	200- -250			2000- -3000	90- -100	600- -750	300- -340			1500- -2000	150- -170
C (powder)	500- -750	200- -280			2000- -3000	100- -115	600- -800	300- -380			1500- -2000	150- -200

We ‘ll consider the opportunity of cord wire production with other fillings according to Buyer’s order.

**The results of steel (Russian grade 2 ГЮ) treatment** **by cored wire, CaAl wire and Ca powder.**
Process indications	Treatment of melts experimental by CaAl wire	Treatment of melts standard by Ca powder + CaAl wire	Treatment of melts standard by Ca powder
Ca specific consumption, kg/t	0,30	0,64	0,48
Degree of sulphur removal, %	24,2	45,5	22,6
Efficiency of Ca application for sulphur removal, % - T/kg	81,7	73,5	47,1

Sheets of steel 22ГЮ are used for manufacturing of tubes for oil and gas wells. Rejection of tubes produced from melts treated by cored CaAl wire, regarding metallurgical defects while ultrasonic testing, has decreased as to compare with common melts , blown by SiCa powder. Thus, the treatment of steel type 22 ГЮ by cored wire CaAl can be considered promising for full-scale metal production.