Month: August 2023

Recently one set of mini decanter centrifuge and mini shale shaker are ready for shipment for mining exploration.

Mining shale shaker and decanter centrifuge are major equipments of diamond core drilling solids removal unit for waste water treatment. The mini shale shaker’s function is to remove the coarse solids from the waste water, and reduce the solids content, so that the fluids feeding to decanter centrifuge can meet the feeding standard, which will improve the decanter centrifuge treatment performance. The decanter centrifuge is to remove the fine solids from the waste water and get much clean water, which can be reused for drilling. The purpose to use the solids removal unit is to recycle the water , reduce water consumption and reduce drilling cost.
If the coarse solids content is very less, a filter can be used before centrifuge to prevent coarse solids entering into decanter centrifuge, otherwise the centrifuge screw will be easily blocked and easily damaged by the coarse solids.

The 9 inch decanter centrifuge has 2 models for different applications. GNLW223 mini decanter centrifuge is the economic centrifuge for fine solids separation, the max speed is 4500rpm, and max G force is 2492G, the typical speed is 3800rpm, and working G force is 1777G, the design capacity is 130L/min, the typical capacity is 100L/min, the dewatering capacity is 1 m3/h.
When ultra fine solids required to be separated out, GNLW224F-VFD decanter centrifuge can be applied, the bowl length is 36.4 inch, the bowl length is longer for longer time clarification of material for better treatment performance. Max speed is 5000rpm, typical speed is 0 ~ 4500rpm, to reach working G force 2492G.A VFD control panel will adjust the main motor, back motor frequency to reach better treatment result.
For more information, pls contact with GN solids control.

Recently one set of big bowl decanter centrifuge package is ready for delivery to international mining tailings dewatering project. The big bowl decanter centrifuge model is GNLW764A-VFD, which has been widely used for mining tailings dewatering project in the past. The system including 2 containers, the top container with big bowl decanter centrifuge, the bottom container with chemical dosing unit, both of the containers with windows and doors, for convenient transportation and operation.

GNLW764A-VFD decanter centrifuge technical parameter is as below:
Bowl diameter is 30inch (760mm), bowl length is 3328mm, the max capacity is 120m3/h, the treating capacity for oil sludge , mining tailings and other materials will be various as per different conditions. max bowl speed is 2650rpm, max G force is 3000G, the mechanical separation cut point is 2~ 5 microns, differential speed is 5~ 28 rpm, and gearbox torch is up to 25000 N.M., gearbox ratio is 38:1, the main motor is 160KW (217HP)，back drive motor is 90KW (120HP). The bowl main components including big end, small end, are made of duplex stainless steel 2304, the collection box is also made of SS304, the screw is made of stainless steel, and the bearing is from SKF for reliable working. By working with chemical additives, the centrifuge can separate ultra fine solids from the mining tailings, to get more clear water and drier solids. VFD control panel for main motor, back drive motor and feeding pump motor can adjust the motor frequency and control the feeding rate and get required treatment result.

The coal dewatering centrifuge can be utilized for coarse coal, fine coal, ultra fine coal, coal tailings dewatering treatment. Compared with filter press, the dewatering centrifuge is with small footprint, easy operation and maintenance, less cost, less maintenance cost. For more information, pls contact with GN solids.

Recently Several packages of vertical cuttings dryer system are ready for shipment to our international clients. One unit of GNCM-40A drilling cuttings treatment system is shipped to Brazil, 2 units of containerized vertical cuttings dryer system is shipped to Russia. The photo is as below:
The technical configuration of GNCM-40A drilling cuttings treatment system is as below:

1) One set of GNCD930 vertical cuttings dryer with flushing pump, its rotation speed is up to 900rpm reach 420G force, we have 0.25mm, 0.35mm and 0.5mm screen basket opening for option.
2) One set of GNLW363D-VFD decanter centrifuge with feeding pump, the max speed is up to 3900rpm, typical speed is 3200rpm, max G force is up to 3063G, it can be used to separate fine solids from the drilling fluids discharged from vertical cuttings dryer.
3) 2 sets of screw conveyor to transfer the drilling cuttings from drilling mud solids control shale shaker to vertical cuttings dryer feeding port, and transfer the separated solids from discharge port to waste container. We provide customized supporting skid for the screw conveyor for our client to install them easily at rig site.
4) Telescopic skid of vertical cuttings dryer and telescopic skid of decanter centrifuge and fluids collection tank are all on the compact skid for convenient transportation and installation.
The technical configuration of containerized drilling waste management system is as below:

One set of vertical cuttings dryer with flushing pump and one set of decanter centrifuge with feeding pump, both of them are installed inside the container to keep the operation warm in Winter, so the drilling fluids will not be frozen in cold weather.
Both of the drilling waste management system are widely used for oil based drilling cuttings treatment or SOBM treatment, if you need solution for drilling waste management, pls contact with GN solids engineer.