Description

During long-term high-temperature operation of industrial furnaces, refractory materials experience significant stress due to thermal expansion, thermal shock, and their own weight. Without a reliable anchoring system, this can easily lead to loosening, detachment, or even complete failure of the furnace lining. Anchoring components are the core structural parts that ensure the safe operation of refractory linings.

The Furnace anchors secure the lining to be connected in a specific position to resist static loads, thermal stress, mechanical rotation, or vibration. They help prevent the material from collapsing before ceramic bonding occurs during construction and heating, and also help ensure uniform material shrinkage, preventing large, concentrated cracks in the lining.

There are two types: metal and ceramic. Metal Furnace anchors are made of materials such as low-carbon steel, heat-resistant alloy steel, and nickel-chromium alloy; ceramic Furnace anchors are made of refractory raw materials through molding and firing.

Metal anchor material and maximum operating temperature

Material	Operating temperature /℃	Material	Operating temperature /℃
Low carbon steel	450	320 type stainless steel	900
Silicon steel	650	309 type stainless steel	1050
Ferrochrome (Cr15%)	850	310 type stainless steel	1100
Ferrochrome(Cr≥15%)	950	Chromium-nickel-iron alloy	1200

Ceramic anchor material and maximum operating temperature

Material	Operating temperature /℃	Material	Operating temperature /℃
Clay	1350	High aluminum(Al₂O₃80%)	1650
High aluminum(Al₂O₃60%)	1450	High aluminum(Al₂O₃85%)	1700
High aluminum(Al₂O₃70%)	1550	Corundum	1800

Ⅰ.It can withstand high operating temperatures and is generally used in the lining of kilns that operate at temperatures above 1200℃ for extended periods;

Ⅱ.It can withstand the erosion and corrosion of corrosive atmospheres;

Ⅲ.It can be extended to the working surface, reducing the risk of overall lining spalling;

Ⅳ.Compared with metal Furnace anchors, it has a larger contact area with the refractory lining, and therefore has a greater supporting capacity;

Ⅴ.Its coefficient of thermal expansion is comparable to that of the integral refractory material, which can eliminate cracking or spalling of the lining caused by thermal expansion mismatch.

Furnace anchors are available in various shapes, including Y-type, V-type, T-type, M-type, Z-type, and S-type.

Metal furnace anchors are used to support and secure thin refractory castables, refractory plastics, and refractory spray coatings. The selection of anchor shape depends on the structure of the lining.

Ceramic furnace anchors are typically designed with flat top and bottom surfaces, while the remaining four sides are serrated to increase the contact area and friction with the lining, thereby providing effective suspension and support.

product-1058-485

Furnace anchors are mostly used as fasteners for integral linings (lined with castable, plastic, and shotcrete materials). Metal Furnace anchors are typically used to support and secure thinner or insulated integral linings, such as chimney linings, wear-resistant linings of petrochemical catalytic cracking reactors (often using hexagonal mesh Furnace anchors), linings of integral spray guns in jet metallurgy, integral linings of impregnation tubes in DH and RH vacuum degassing units, and linings of rotary kiln outlets and inlets. Metal Furnace anchors are mostly used to secure linings with long-term operating temperatures below 1200℃, or linings with short-term intermittent operating temperatures above 1200℃. Ceramic Furnace anchors are typically used to secure thicker (greater than 200mm) integral linings.

Arrangement and Spacing: The arrangement and spacing of Furnace anchors depend on the shape of the furnace shell or components, the material (density) and thickness of the lining, the operating temperature and conditions (continuous and intermittent operation), and the magnitude of the thermal and mechanical stresses borne by the lining. The arrangement of Furnace anchors must be designed to provide sufficient support strength without causing long cracks in the refractory material during thermal expansion and contraction.

product-1597-704

Y-type Anchor Parameter Table

Type	Parameter
Type	A	B	E	L1	L2	D	R	C	Single weight(kg)
MY-1MYQ1	100	60	20	127	69	12	12	30	0.17
MY-2/MYQ2	125	75		155	81				0.21
MY-3/MYO3	150	90		182	93				0.24
MY-4/MYQ4	175	100	25	210	116				0.29
MY-5/MYQ5	200	120		236	122				0.32
MY-6/MYO6	225	125		266	147				0.37
MY-7/MYO7	250	150		291					0.39
MY-8/MYO8	275	175		316					0.41
MY-9/MYQ9	300	200	30	342	152	16	16	35	0.78
MY-10/MYQ10	325	225		367					0.82
MY-11/MYQ11	350	250		392					0.86
MY-12/MYQ12	375	255		421	176				0.94
MY-13/MYQ13	400	280		446					0.98
MY-14/MYQ14	425	305		471					1.02
MY-15/MYQ15	450	330		496					1.06
MY-16/MYQ16	475	355		521					1.10
MY-17/MYQ17	500	360		551	200				1.19
MY-18/MYQ18	525	375		578	213				1.25
MY-19/MYO19	550	390		605	225				1.31
MY-20/MYQ20	575	395		634	249				1.39
MY-21/MYQ21	600	420		659					1.43
MY-22/MYO22	625	445		684					1.47
MY-23/MYO23	650	470		709					1.51
MY-24/MYO24	675	475		739	274				1.60
MY-25/MYQ25	700	480		768	298				1.69
MY-26/MYO26	725	505		793					1.72
MY-27/MYO27	750	530		818					1.76
MY-28/MYQ28	775	555		843					1.80
MY-29/MYQ29	800	580		869					1.84
MY-30/MYO30	825	605		893					1.88
MY-31/MYQ31	850	630		918					1.92

Technical Requirements

1.0Cr18Ni19 For inter-material welding, F347 welding rods are used.(GB/T983-1995)

2.0Cr25Ni20 For inter-material welding, F310 welding rods are used.(GB/T983-1995)

3.Q345A For inter-material welding, F5015 welding rods are used.(GB/T5117-1995)

4.MY The anchor material is 0Cr18Ni19;The material for MYA type Furnace anchors is 0Cr25Ni20;

MYQ The anchor material is Q345A.

V-type anchor parameter table

Type	Parameter
Type	F	L3	d	r	Single weight(kg)
MV-1/MVQ-1	20	52	8	10	0.02
MV-2/MVQ-2	30	76			0.03
MV-3/MVQ-3	40	100			0.04
MV-4/MVQ-4	50	125			0.05
MV-5/MVQ-5	60	150			0.06
MV-6/MVQ-6	70	174	12	14	0.15
MV-7/MVQ-7	80	199			0.18
MV-8/MVQ-8	90	223			0.20
MV-9/MVQ-9	100	247			0.22

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Y-type flat steel open anchor parameter table

Specification	A value	B value	R value	ФD	Weight (grams)
YSW--35	35	15	5	8	14.6
YSW--40	40	20	5	8	16.9
YSW--45	45	25	5	8	19.2
YSW--50	50	30	10	10	33.5
YSW--55	55	35	10	10	37.2
YSW--60	60	40	10	10	40.8
YSW--65	65	42	10	10	44.4
YSW--70	70	45	10	10	47.6
YSW--80	80	50	10	10	54.3
YSW--90	90	55	10	10	61.0
YSW--100	100	60	10	12	97.4
YSW--110	110	65	10	12	107
YSW--120	120	70	10	12	117
YSW--130	130	75	10	12	126
YSW--140	140	80	10	12	136
YSW--150	150	85	10	12	146
YSW--160	160	85	10	12	155
YSW--170	170	90	10	14	224
YSW--180	180	90	10	14	236
YSW--190	190	95	10	14	249
YSW--200	200	95	10	14	261
YSW--210	210	95	10	14	273
YSW--220-350	220-350	95	10	14	261+(A-200)*123

Technical Requirements

1.0Cr18Ni19 For inter-material welding, F347 welding rods are used.(GB/T983-1995)

2.0Cr25Ni20 For inter-material welding, F310 welding rods are used.(GB/T983-1995)

3.Q345A For inter-material welding, F5015 welding rods are used.(GB/T5117-1995)

4.The material for MV/Y type open Furnace anchors is 0Cr18Ni19.

The material for the MVA/Y type open anchor is 0Cr25Ni20.;

The material for MVQ/Y type open Furnace anchors is Q345A.

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