New solution for crushing of ilmenite slagMinerals and materials processing technolog
Minerals and materials processing technology specialist IMS Engineering has introduced a slag jaw crusher to the mining industry.
The crusher, which was engineered by IMS Engineering’s Kawasaki comminution technology partner EarthTechnica, of New solution for crushing of ilmenite slagJapan, is distinctive in the market and specifically developed for the processing of ultra-abrasive slag containing uncrushable lumps of metal, says IMS Engineering marketing and customer support manager Shannon McEwan.
The company states that the machine is ideally suited for the crushing of ilmenite slag, which produces titanium dioxide (TiO2) feedstock. Currently South Africa-based producers of TiO2 feedstock, produce slag through the smelting of ilmenite. This involves the carbonaceous reduction of ilmenite to produce slag with a TiO2 content of about 85% and a high-purity pig iron as coproduct. Nonmagnetic heavy minerals, such as zircon and rutile, are processed in separate circuits.
“The crusher,, which is used in the primary crushing application, is extremely robust with a heavy-duty frame. It is fitted with extra-thick jaw liners to reduce the lead time between liner changes in this abrasive crushing environment, reducing the cost of operation. The heart of the crusher is the large hydraulic cylinder that replaces the crusher’s toggle plate protection system. This also protects the machine body and shortens recovery time,” says McEwan.
After the smelting process, the cooled ilmenite slag is crushed, milled and screened to produce the requisite fine fractions for the chloride and sulphate pigment processes.
When large lumps of uncrushed material are fed into the crushing chamber, the hydraulic pressure increases and a relief valve is activated releasing oil in a controlled manner.
This results in the automatic discharge of uncrushable material. A pressure sensor sends out a signal to stop the feeder and starts the hydraulic pump. The discharge gap is then automatically returned to the original setting once the hydraulic pressure returns to normal and the uncrushable material has passed through the system. The crusher, then recovers automatically to the normal operation.
The crusher is available with either a hydraulic-type protection system or a mechanical-stalling clutch system, which the operator can control should something go wrong. A splitter hydraulic design system has also been developed to constantly pro-cess very hard material.
IMS Engineering also offers technologies for other aspects of ilmenite slag processing. These include magnetic-separation technology specialist Steinert’s overhead-suspension magnets for iron and tramp-iron removal, and magnetic drum separators, which can be used to upgrade discharged material, resulting in a higher grade of pig iron. Steinert magnetic technology has a record in mines and recycling operations and is used to increase the purity of raw materials for further processing and to protect conveying and processing equipment through tramp-iron removal.
Further, McEwan says that IMS offers products for secondary application processing. “Kawasaki EarthTechnica Cybas cone crushers and Hazemag hard rock impactors can be used in the secondary application, followed by Kawasaki EarthTechnica vertical roller mills for the grinding down of material for classification into two fine fractions as raw material for sulphate and chloride pigment processing,” he concludes.
Crushing of Ilmenite Slag
New solution for crushing of ilmenite slagMinerals and materials processing technolog
Minerals and materials processing technology specialist IMS Engineering has introduced a slag jaw crusher to the mining industry.
The crusher, which was engineered by IMS Engineering’s Kawasaki comminution technology partner EarthTechnica, of New solution for crushing of ilmenite slagJapan, is distinctive in the market and specifically developed for the processing of ultra-abrasive slag containing uncrushable lumps of metal, says IMS Engineering marketing and customer support manager Shannon McEwan.
The company states that the machine is ideally suited for the crushing of ilmenite slag, which produces titanium dioxide (TiO2) feedstock. Currently South Africa-based producers of TiO2 feedstock, produce slag through the smelting of ilmenite. This involves the carbonaceous reduction of ilmenite to produce slag with a TiO2 content of about 85% and a high-purity pig iron as coproduct. Nonmagnetic heavy minerals, such as zircon and rutile, are processed in separate circuits.
“The crusher,, which is used in the primary crushing application, is extremely robust with a heavy-duty frame. It is fitted with extra-thick jaw liners to reduce the lead time between liner changes in this abrasive crushing environment, reducing the cost of operation. The heart of the crusher is the large hydraulic cylinder that replaces the crusher’s toggle plate protection system. This also protects the machine body and shortens recovery time,” says McEwan.
After the smelting process, the cooled ilmenite slag is crushed, milled and screened to produce the requisite fine fractions for the chloride and sulphate pigment processes.
When large lumps of uncrushed material are fed into the crushing chamber, the hydraulic pressure increases and a relief valve is activated releasing oil in a controlled manner.
This results in the automatic discharge of uncrushable material. A pressure sensor sends out a signal to stop the feeder and starts the hydraulic pump. The discharge gap is then automatically returned to the original setting once the hydraulic pressure returns to normal and the uncrushable material has passed through the system. The crusher, then recovers automatically to the normal operation.
The crusher is available with either a hydraulic-type protection system or a mechanical-stalling clutch system, which the operator can control should something go wrong. A splitter hydraulic design system has also been developed to constantly pro-cess very hard material.
IMS Engineering also offers technologies for other aspects of ilmenite slag processing. These include magnetic-separation technology specialist Steinert’s overhead-suspension magnets for iron and tramp-iron removal, and magnetic drum separators, which can be used to upgrade discharged material, resulting in a higher grade of pig iron. Steinert magnetic technology has a record in mines and recycling operations and is used to increase the purity of raw materials for further processing and to protect conveying and processing equipment through tramp-iron removal.
Further, McEwan says that IMS offers products for secondary application processing. “Kawasaki EarthTechnica Cybas cone crushers and Hazemag hard rock impactors can be used in the secondary application, followed by Kawasaki EarthTechnica vertical roller mills for the grinding down of material for classification into two fine fractions as raw material for sulphate and chloride pigment processing,” he concludes.
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