1.Metso Outotec Carbon Steel Flotation Cells Project
This product is the largest flotation cell model we have ever fabricated, with high quantity and tight delivery time. It was designed by Metso Outotec with carbon steel as the main material, over 50 units in total. It uses a bolted lightweight optimized design structure, but faced challenges of thin sheets prone to deformation, and each cell body needed to be lined with imported natural rubber before pre-assembly, posing great difficulties for production and site organization.
2.Machining the slewing body parts for 700-ton large excavator
The excavator upper frame consists of left platform, right platform, and slewing body. This upper frame machining project has many processes and high precision requirements, its machining quality directly affects overall equipment performance and is a key structure of the excavator. We adopted a scheme of completing all machining of the slewing body through secondary fixturing. After clamping the front and back of the slewing body, the 5-axis linked Italian Accettai 280 floor boring and milling machine was used to complete milling of the bearing and reducer installation locations, as well as drilling holes for the boom mounting and boom cylinder mounting.
Machining on Italy Innse Berardi 280 large boring mill
Machining on Wuzhong heavy dual column boring and milling machining center
3.Supporting product for Xugong XGC260K crawler crane
This crawler crane adopts an integrated low center of gravity large chassis design with load capacity over 260 tons, mainly used in large construction, chemical and other industries. This project had urgent delivery timelines, high standards and relatively complex production processes, requiring assembly and welding 3 times, with shaping and straightening needed after the second assembly and welding before overall machining. During project implementation, the owner also invited HLTS company experts as third-party supervisors to conduct full-process quality control over the entire project.。
4.Box body for supporting Xugong DE120 large mining truck
The box body supported this time for the large mining truck has load capacity over 150 tons, 12 units total. From steel plate procurement, cutting, assembly, welding, machining, milling, drilling, coating, to packaging, all processes were strictly controlled according to ISO and AWS standards.
Welding process
5.Structural parts for Australia FMG mine equipment
The material is wear-resistant NM400 steel and passed CNAS testing. Tanaka laser and Messer plasma from Germany were used for precise cutting, and Italian Colgar bender for bending.
6.Arm for drum shearer coal mining machine
The shearer mainly consists of four parts – cutting section, traction section, walking section, electrical control section, as well as hydraulic system, spray cooling system, electrical system, etc. The shearer drum arm is an important part of the cutting section. It is the mechanism that directly drives the drum to fracture and load coal, with very high machining precision requirements. Challenge: High precision machining must ensure high hole positional accuracy and surface quality between the axis holes. Before production, our technical department made detailed analysis of CNC machining processes, workpiece positioning, fixture selection, tooling and cutting usage, tool offset and compensation amounts, etc. During machining, we used Wuchang boring machines to ensure coaxiality between bearing holes, through holes and threaded holes, and parallelism between hole centerlines.
7.Large mineral washer
The client is FMG, Australia’s 3rd largest and the world’s 4th largest mining company. The materials involved for this product, including plates, pipes and forgings, all passed CNAS testing per customer requirements. The product uses welded integral installation design, with single cylinder weight near 35 tons. Precision requirements include perpendicularity and concentricity tolerance of end connecting flanges, and high surface roughness requirements. We used 260 floor boring machines for machining the external circular slots, and 12.5m vertical boring mills for machining the end flange surfaces and external holes. The machining process also involved milling of cylinder body holes and slots, cylinder flange turning, drilling and tapping, cylinder handling and turning, hoisting and installation of rubber lining, etc.
8.Equipment for 99m diameter concentrator
This concentrator equipment has 99m diameter, about 330 tons each set, uses Q345B material, and was designed by Metso Outotec, a globally leading mineral processing and metal production technology company. This project involved processes of cutting, assembly, welding, shaping, machining, final assembly, sandblasting, painting, etc. And due to the many structural section materials, sandblasting and painting was very challenging. The customer arranged long-term resident SQE and third-party supervisors to inspect each process.
Painting
9.Metso ball mill structural parts
1)180-degree split ball mill: Max diameter 15m, height 5m, also high machining difficulty. Uses Q235B material, through processes of cutting, beveling, rolling, welding, splitting, welding, heat treatment, coating, machining, rubber lining, etc.
2）8600mm diameter ball mill cylinder: Cylinder wall thickness 83mm, diameter about 8600mm, max flange weld thickness reaches 190mm, single cylinder weight over 90 tons.
Ball mill cylinder assembly