Mill Girth Gear and Rotary Kiln Girth Gear for Mining

Product Details
Customization: Available
After-sales Service: Online Supporting Service
Warranty: 12 Months
Gold Member Since 2015

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Number of Employees
4
Year of Establishment
2014-02-10
  • Mill Girth Gear and Rotary Kiln Girth Gear for Mining
  • Mill Girth Gear and Rotary Kiln Girth Gear for Mining
  • Mill Girth Gear and Rotary Kiln Girth Gear for Mining
  • Mill Girth Gear and Rotary Kiln Girth Gear for Mining
  • Mill Girth Gear and Rotary Kiln Girth Gear for Mining
  • Mill Girth Gear and Rotary Kiln Girth Gear for Mining
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  • Overview
  • Product Description
  • Features
  • Product Parameters
  • Certifications
  • Company Profile
  • Our Advantages
Overview

Basic Info.

Model NO.
Girth Gear
Dia
1000mm-16000mm
Weight
Max 120 Mt Single Piece
Module Range
10 Module to 70 Module
Certificate
ISO 9001:2008
Gear Cutting Machines
16m CNC Hobbing Machine
Standards/Certificates
Uni En ISO Aws ASTM ASME DIN
Hardness
Hb210 ~ 250
Ultimate Strength
Rb \ 690MPa
Yield Stress
RS \ 490MPa
Elongation
D5 \ 11%
Transport Package
Ball Mill Girth Gear
Specification
Ball Mill Girth Gear
Trademark
ZTIC
Origin
Luoyang, Henan
Production Capacity
3000PCS/Year

Product Description

Mill Girth Gear and Rotary Kiln Girth Gear for Mining
 
Product Description

Girth Gears: Rotary kiln Girth Gear,ball mill Girth Gear

Girth Gears offered find extensive application in different industry sectors including in sponge iron plants, steel & cement industry, mining industry, wind mills as well as in other industry sectors. These are made available in module range of 10 Module to 70 Module and in minimum diameters of 100 mm to 15000 mm. Further, these comprise maximum weight of 70 MT single pieces. Here the range of hardened & ground gear boxes/gears comprise Worm gear boxes, Helical / Double helical gears/gearboxes, Helical-Bevel gearboxes, Planetary Gearboxes and others.

ZTIC Gear Cutting Machines include:

Ø16m CNC Hobbing MachineØ12m Gear Cutting Machine (Switzerland)Ø10m Hobbing Machine (Germany)Ø4m CNC High Speed Hobbing Machine (Germany)Ø1.6m Horizontal CHC Hobbing Machine (Germany)Ø5m CNC Profile Gear Grinding Machine (Germany)Ø2.8m CNC Profile Gear Grinding Machine (Germany)Ø1.25m CNC Profile Gear Grinding Machine (Germany)Ø1m CNC Profile Gear Grinding Machine (Germany)Ø0.8m CNC Profile Gear Grinding Machine (Germany)Automatic positioner

Module Range:  10 Module to 70 Module.
Diameter : Min 100 mm to16000 mm.
Weight : Max 120 MT single piece.

Hardened & Ground Gear Boxes/Gears:

Worm gear boxesHelical / Double helical gears/gearboxesHelical-Bevel gearboxesPlanetary GearboxesHardened & Ground Helical- bevel gears & Spiral-bevels gears/gearboxes.Rack & Pinions

Ratings:
Min 3 hp to  Max 1400 hpSplash / Forced lubrication type
Send Enquiry
With more than 1000 girth gears sold over the world CITICIC Gear is a leading supplier in the cement and mineral industry. And as member of AGMA (American Gear Manufacturers Association), we do actively take part in defining the standard for gear rating calculations and service factors. 

We provide girth gears in three different designs

Fabricated steel
- forged ring
- rolled plate
Cast steel 
Ductile (Nodular) cast iron  

Fabricated gears became more common in the past and are constructed with forged steel gear rim materials and electro welded body structure. The rings are manufactured from a whole block of high resistance alloy steel. After the rough machining of the ring, we carry out hardening and tempering heat treatment in order to improve the mechanical characteristic and therefore its relevant performance.  

Mill Girth Gear and Rotary Kiln Girth Gear for Mining

Avantages of fabricated girth gears

The forged material structure excludes the risk of inclusions
Structure defects like gas holes, micro shrinkage, pin holes, hot tears, sand and slag inclusions are avoided
Hence, repair welding of the body structure and e.g. grinding of toothed areas is not required.
The fabricated manufacturing procedure excludes the need for patterns and risers
Rim material has higher hardness and higher strength than the material used for the underlying structure (i.e. web, gussets)

These features will reduce the lead time and costs. Fabricated manufacturing ensures a fast delivery.

This is especially beneficial in an emergency situation, where the existing gear rim is suffering from damage   

Features

External teeth 

Maximum diameter: 16000 mm 
Toothed face width: 1700 mm 
Maximum module: 45 by hob 
Maximum module: 65 gear finishing cutter
Internal teeth 
Maximum Diameter: 6500 mm 
Maximum module: 25.4 
Toothed face width: 400 mm

Forging material process 
Forging 
Final rolling 
Furnace cooling 
Control on production 
Water quenching 
Hardness testing 
Rough machining 
Ultrasonic testing and dimensional inspection 
Final inspection certification


Standards/Certificates 
UNI EN ISO 
AWS 
ASTM 
ASME 
DIN 
Applications 
Our girth gears are applied in the cement and minerals industries: 
Various types of horizontal mills 
Rotary dryers 
Rotary kilns 
Any other large gear ring application

Mill Girth Gear and Rotary Kiln Girth Gear for Mining

Advantages

One SourceOriginal Equipment Manufacture (OEM) Technical DrawingsGearing technical expertise for kilns and grinding millsState of the art manufacturing facilities and qualityGlobal sales and service supportRotary  Kiln Girth Gears

We are leading supplier the Kiln Girth Gears for the various plants as listed below.

Sponge Iron Plants  50TPD 100TPD 300TPD350TPD,500TPD,1000TPDCement plants as per customer requirementGears for phosphate mines, Alumina plant, kaolin-bentonite

Gear Cutting Capacity:

100mm diameter to 16000mm diameter10Module to 70Module

The Kiln girth gears are available mainly in bi-part, four parts, 8 parts or multi segments as per the requirement and suitability with the application of gear.In the field of grinding mill components, We supply mill heads,feed inlet,grinding roller,cement kiln riding ring, casting gears, shaft block .Also we supply mill shell of welding structures and fabrications.

Quality assurance documents
The following reports are to be submitted to Quality Assurance:
a. Chemistry report
b. Physical report
c. Heat treatment documents CITIC HMC  Q/HM 973.2-2007Specification for Steel Castings for Grinding Mills
d. Ultrasonic inspection report (before and after repairs)
e. Magnetic particle inspection report (before and after repairs)
f. Dimensional report
g. Weld repair maps
h. Weld procedures and Procedure qualification record
i. Welder qualification
j. Nondestructive testing inspector qualification

Product Parameters

 

Item

Structural features

Processing measure

Test content

Girth Gear

(1)GS42CrMo4Alloy Steel (corporate proprietary standards)

HB 220~240

(2)semi-structured, Y-Spoke 
(3)Helical 
(4) reasonable sealing and alignment structure of alloy steel (corporate proprietary standards)
(1) outer steel refining (R-H argon and vacuum treatment) 
(2) proprietary cold mold hanging sand technology to ensure the casting, the teeth dense 
(3) normalizing (proprietary technology) to ensure that the tooth surface hardness 
After
(4)rough hobbing, release time, repair the joint surface, then fine roll 
(5) proprietary homemade hob fine hobbing
(1)castings mechanical properties and chemical composition (internal standard) 
(2) roughing after sonic testing 
(3)semi-finishing, finishing after ultrasonic testing and magnetic particle inspection 
(4) tooth surface magnetic particle inspection, hardness test 
(5)tooth tolerance check 
(6) the factory assembly load test to check the accuracy of the size of gear

The technical requirements of a large CITICIC Gear ring:
1) is pretreated before normalizing surface hardening treatment, the hardness should HB210 ~ 250; mechanical performance are the ultimate strength Rb \ 690MPa, yield stress Rs \ 490MPa, elongation D5 \ 11%, reduction of area W \ 25% , impact toughness Ak \ 30J; teeth induction hardened, hardness HRC50 ~ 55; effective hardened layer depth \ 3 ~ 5mm.
2) overall ultrasonic flaw detection, internal quality should meet two requirements GB7233-87 standard requirements; tooth and fillet magnetic particle inspection, quality should meet two requirements GB/T9444-88 standards.
3) Note the casting is not rounded R5 ~ R10.
4) Tooth chamfer at both ends and 1 45b.5) by two and a half ring gear tooth width of each ring coupling along the edge of a whole ring made with high strength bolts, combined with the tooth surface must be at the bottom center.
2 large ring gear manufacturing process
2.1 of rough
Steel casting blank is provided by CITIC Heavy Machinery Co., Ltd. Heavy Forging plant, run by GB11352-89 standard specifies requirements for modeling according to the casting process, smelting, casting, hit boxes, cleaning, dressing castings;. During inspection and acceptance by the drawings and Technical requirements for steel blank
Checks, according JB/T6402-92 standards issued after acceptance
Down procedure.
2.2 roughing
Crossed by drawing and stay out allowance, alignment, connection, processing both inside and outside the circle, combining face milling, drilling and other processes.
2.3 Exploration injury
Overall ultrasonic flaw detection, internal quality should meet the two requirements of GB7233-87 standards.
2.4 normalizing pretreatment
Semi-ring pairs normalizing and tempering treatment, provide a good organization for subsequent surface hardening; press drawings deformation of the half ring gear inspection after heat treatment.
2.5 Machining
First two and a half ring is made with high strength bolts connecting the ring as a whole, the overall process by drawing a circle Quannei Wai teeth and upper and lower end, and then drawing and machining milling process requirements.
2.6 Elimination of processing stress
The overall ring annealed to eliminate stress.
2.7 overall ring surface hardening
IF along the alveolar tooth surface induction hardening, hardness HRC50 ~ 55, effective hardened layer depth \ 3 ~ 5mm.
2.8 Final inspection
First, the detection frequency quenching, the hardness after tempering ring gear cogging meets the requirements of the drawings; secondly, to detect whether the maximum outer diameter larger size D6944 as the deformation \ 3mm, the mechanical correction required until qualified; Thirdly, tooth and fillet magnetic particle inspection, quality should meet two requirements GB/T9444-88 standard requirements; Finally, according to the drawings and technical requirements for final inspection.

Certifications

Mill Girth Gear and Rotary Kiln Girth Gear for Mining

Company Profile

Mill Girth Gear and Rotary Kiln Girth Gear for Mining

Our Advantages

Mill Girth Gear and Rotary Kiln Girth Gear for Mining


 

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