Specifications

Bell type annealing furnace(RBG 100*200QL)
Diameter of treating wire: 1.0mm;
Carbon content of wire: Low carbon steel wire;

Well type annealing furnace(RJ-95-8)

I. Requirements of well type resistance furnace

1. Diameter of treating wire: 1.0mm;

2. Carbon content of treating wire: Low carbon steel wire;

3. Dimension of wire coils for 1.0mm wires: inner diameter 270mm, outer diameter 400mm, height 90mm, weight 25kgs/coil;

4. Required capacity of furnace: 4.0Ton/day.

5. Purpose of resistance furnace: Soften steel wires before further drawing. 

II. Composing of resistance furnace

1. Well type resistance furnace         1pc

2. Inner furnace pot                  2pcs

3. XL-21 Electric control cabinets       1pc

III. Technical parameters of resistance furnace

       Consider about the actual outside dimensions of furnace and the container limit for delivery, we have suggested following furnace with capacity 2.5Ton per furnace for client, as order 2pcs inner furnace pots, so can have two furnace per day, so the actual capacity will be 5.0Ton per day:

IV. Furnace with capacity 2.5Ton/furnace

Name	Unit	RJ-95-8
Rated power	kW	95
Rated voltage	V	380
Frequency	HZ	50
Normal working temperature	°C	650-750
Temperature rising on furnace surface	°C	≤45°C
Power phase		Three phase
Connecting way of power wires		YY
Quantity of temperature control section	pc	2
Effective inner dimension of furnace pot	mm	Φ1150×1800×8
Outside dimension of heating furnace	mm	Φ2200×2450
Outside dimension of inner pot	mm	Φ1315×2010
Outside dimension of heating furnace base	mm	Φ1670×470
Outside dimension of control cabinet	mm	800×500×1800

V. Description of well type resistance furnace

This electric furnace is intermission working type resistance furnace, which is very suitable for the heat treatment of many kinds of steel wires and abnormal items, its normal working temperature is around 750°C.

Whole set of equipment is composed of well type resistance furnace, stainless steel type furnace pot and temperature control system. Furnace body is composed of furnace cover, furnace liner, heating items and so on. Outside of furnace cover is designed in round shape.

Furnace liner is made of most advanced needles shape fiber modules, which are much more advanced than traditional furnace. Its detailed advantages are as following: 

Brick type furnace	Energy saving type fibers furnace
Furnace hearth is made of good quality light bricks, which have big specific weight and huge decalescence rate	Furnace hearth is made of full fibers silicate aluminum modules, which have small specific weight, small decalescence rate, and great heat preservation performance
Electric heating items are put on  wire laying bricks, which have very low thermal efficiency	Electric heating items are hanged inside furnace hearth, they are completed bared for directly radiation, which have high thermal efficiency
Have heavy weight	Have light weight
Furnace wall  is thick	Furnace wall is very thin, only have the half thickness of brick type furnace
Temperature rising very slowly	Temperature rising very fast
Need lots of energy	Can save 25%—30% energy

Furnace pot is made of stainless steel SUS321 with thickness 8mm,its inner effective dimensions is φ1150×1800mm, 0.8mm wire coils will be put in 5coils for each lay and total 20lays inside it.

High temperature resistance electric heating items are adopted as heating items for resistance furnace. They are directly hanged inside furnace hearth which guarantee the heating items are completely bared and can directly radiate to furnace pot to ensure high heating efficiency.

      “Position shape” control is used for temperature control system, which have many functions, such as digital display meters, over temperature alarm, time limit and so on.

VI. Standard for well type resistance furnace

All the manufacturing, installation and inspection of well type resistance furnace are done according to following standards:

1. Current part of GB-10067.1-4-88<Basic technical conditions of electric heating equipments>;

2. Current part of GB10066.1-4-88<Testing method of electric heating equipments>;

3. JB/DQ5071-82 Furnace building manual for resistance furnace;

4. JB2851-92 Standard of resistance furnace and temperature control cabinets.