Best Mining Solutions For Everyone, Get a Free Quote.
Need A High Quality Mining Machine For Your Project?Contact With Us
You May Also Like
Type :Mineral ore making Input size :0-20mm Final product size : 600-2500mesh (5-23micron) Processed Material: Feldspar, calcite, limestone, talc, barite, rare earth, marble,phosphate ore, kaolin, bentonite, gypsum, Perlite diatomite, dolomite etc. Applications: Chemical Industry, paint, cosmetics, medicine, food additive,etc
“HGM Ultrafine Powder Grinding Mill is new type grinding equipment with optimum structural design developed for the ultrafine powder industry by our company. it is applied to the processing of nonmetallic minerals with the water content less than 10% and the Moh’s hardness under6, such as calcium carbonate, talcum, barite, wollastonite, feldspar etc. It is mainly composed by feeding machine, main engine, grader, pulse dust collector, high pressure positive blower, electronic controlled device and other parts. ”
HGM ultrafine powder grinding mill working principles: Reasonable gap is designed between the grinding roller and shaft pin installed on the grinding roller bracket. When the roller bracket revolving with the main shaft, the grinding roller compresses the grinding ring under the function of centrifugal force and rotates with the shaft pin because of the force of friction. The minerals are quantitatively fed into the dumped material plate of the upper main engine and thrown all around uniformly. Under the force of gravity, they receive multistage impact, extrusion, grinding and then be pulverized. Materials after being ground drop on the following layer dumped material plate and blew by airstream and conveyed into the grading room to be graded by the negative pressure airflow produced by the air blower. Qualified power will enter into the collecting system and become finished products through grading rotor while the coarse powder will drop into the pulverizing room to be pulverized under the function of the centrifugal flow field. The whole vertical type delivery system operates under the full negative pressure and no flying powder phenomenon occurs. It has the advantages of high grinding efficiency, high grading accuracy, high reliability, high clean working environment and small vibration
1. Reliable operation of the grinding chamber: compared with common grinder, this HGM Series Grinder does not have antifriction bearing and bolt inside of the grinding chamber, so problem caused by the bearing and other sealing element will not occur and the problem of machine failure caused by the loose bolt can be avoided. 1. Reliable operation of the grinding chamber: compared with common grinder, this HGM Series Grinder does not have antifriction bearing and bolt inside of the grinding chamber, so problem caused by the bearing and other sealing element will not occur and the problem of machine failure caused by the loose bolt can be avoided. 2. Long time used of the quick-wear part: all the quick-wear parts adopt high-quality wear-resistant materials. 3. Convenient maintenance: HGM series ultrafine main engine has shifting unit and does not need hoist the grader, therefore, the maintenance is convenient and efficient. 4. Double support rigid structure: the grinding roller and grinding ring will not move. 5. All-around feeding and high efficiency. 6. Compared with the same type machine, HGM Ultrafine Powder Grinding Mill has the features of small vibration, convenient maintenance, highly reliable quick-wear part, low operation cost
UFG of pyrite concentrates for subsequent leaching is used in ores, where refractoriness to direct cyanidation arises from fine to ultrafine (<20, >0.02 μm) gold mineral inclusions in the pyrite and/or arsenopyrite. By grinding to 80% passing 10 mm a significant fraction of the colloidal size (<0.5 μm) gold is also being exposed and rendered amenable to cyanidation. On the downside, the huge increase in surface area of pyrite that is created by UFG magnifies 10-fold any preg-borrowing effects, probably assisted by free cyanide, consumption by adsorption onto pyrite surfaces and the formation of thiocyanate (SCN−). If there is carbonaceous matter in the UFG concentrate to be leached, it can contribute to significant losses, because of its relatively huge surface and the irreversible sorption of gold (preg-robbing). More details on this technique may be found in Chapter 17
Ultrafine grinding (UFG) has continued to evolve in terms of equipment development. A number of specialist machines are commercially available including Xstrata's IsaMill®, Metso's Vertimill®, Outotec's High Intensity Grinding (HIG)® mill, and the Metprotech mill. UFG equipment has been developed with installed powers of up to 5 MW
Compared with conventional ball or pebble milling, the specialist machines are significantly more energy efficient and can economically grind to 10 μm or lower, whereas the economical limit on conventional regrind mills was generally considered to be around 30 μm. Coupled with improvements in downstream flotation and oxidation processes, the rise of UFG has enabled treatment of more finely grained refractory ores due to a higher degree of liberation in the case of flotation or enhanced oxidation due to the generation of higher surface areas
In 1993, the Salsigne Gold Mine was reopened. Salsigne treated a gold-bearing pyrite/arsenopyrite ore by flotation, with the flotation tails treated in a CIL circuit and the concentrate reground in a conventional mill to approximately 25–30 μm. The oxygen demand for reground concentrate was high and the rate of oxidation was slow. The concentrate was initially oxidized for approximately 6 h using oxygen injection via a Filblast® aerator before cyanidation. Additional oxygen was added in in the second CIL stage and hydrogen peroxide was added into the fourth unit to maintain dissolved oxygen concentrations of >10 ppm
Goldcorp have commenced operations at the Elenore Gold Project in Quebec, Canada. The mineralogy of the ore and hence the circuit selection show similarities to those at Salsigne. The main sulfides are arsenopyrite, pyrite, and pyrhottite. The ore is floated, with the flotation tails passing to a tails CIL circuit and the flotation concentrate reground before passing to the concentrate CIL circuit via preaeration tanks designed to achieve 18-h contact with oxygen. The main difference between the Salsigne and Elenore projects is that the Elenore concentrate is ground to ∼10 μm and oxidation of the sulfides is substantially complete before cyanidation
Ultrafine grinding is used to liberate gold finely disseminated in metallic sulfides. KCGM is the first gold mine using ultrafine grinding followed by cyanidation (Ellis and Gao, 2002). The gold sulfide concentrate is grind with an IsaMill to a P80 of 10–12 μm. In the first 3 years of operation, high consumption of cyanide and high gold content in leach residues were experienced with difficulty overcoming these issues (Deschênes et al., 2005)
Ultra-fine grinding mill is also called ultra-fine Raymond mill which is one kind of Raymond mill and it is used for mineral material grinding processing in these industries: metallurgy, building materials, chemical industry, mine, etc. Advantages of ultra-fin grinding mill 1. Low noise and low
Ultra-fine grinding mill is also called ultra-fine Raymond mill which is one kind of Raymond mill and it is used for mineral material grinding processing in these industries: metallurgy, building materials, chemical industry, mine, etc.
Copyright © 2021 Facdori Machinery All rights reservedSitemap