1. Simplify the crushing and grinding process feeding particle size is 200-350mm, and after the first autogenous grinding, the product particle size reaches below a few millimeters.
Free quote Send message2. Autogenous mill is suitable for ore with a high content of mud and water small area taken, low investment.
In Vietnam iron ore dressing plant, the ore capacity is larger, and the auxiliary equipment under the cost control has a small quantity. In this case, Xinhai efficient autogenous mill solved these problems effectively. Xinhai efficient autogenous mill can achieve two and three stage crushing, part or all crushing of ball mill and rod mill, it is suitable for the coarse grinding after coarse crushing. Finally, in the actual production, Xinhai efficient autogenous mill improved production efficiency, controlled the cost in the operation, the customer is very satisfied with the result.
The output of the ball mill may decrease during daily use. Do you know why Lets take a close look at these 6 reasons.
Rod mill is a common equipment for grinding mineral. Lets see its working principle and structure in details.
There are two kinds of overflow type ball mill and grid type ball mill, among which, overflow type ball mill can be used for one section grinding and two sections grinding, in addition, also can be used for the middle of two sections grinding operations.
Raymond mill is a commonly used equipment for processing non-metallic mineral grinding powder. Do you know how does it work Click it to learn more details.
Grinding machine is the key equipment for grinding materials after the crushing process. But do you know what factors should be considered when choosing grinding machine Click it to learn more details.
In recent years, the wet ball mill machine has received continuous attention from mining personnel. But do you know the feeding methods of wet ball mill machine Click it to learn more details.
Grinding ratio can reach 4000 5000, more than ten times higher than ball, rod mill. Application. Autogenous mills are common in the primary processing unit for the major large grinding circuits in the mining field, separates out some precious metals, like gold, silver. Ball mill.
Milling, realizing savings in both power requirements and grinding media consumption. The original mill sizing had been done with fully-autogenous milling in mind, but allowing for flexibility and mitigation in case of varied mining fragmentation. Since attaining steady state, target grinds have been achieved.
The third type of mill that I mentioned was an AUTOGENOUS MILL, this type of mill uses a completely different type of grinding media the rock itself.
Autogenous grinding tests were run in a 10-ft x 4-ft Rockcyl mill. The principle of prepared feed and media was utilized to determine how coarse a feed could be commercially fed to a rock mill. Secondary rock milling was expanded toward the particle sizes of primary milling while still utilizing the practices of secondary milling.
The closed circuit test mill was installed in an operating plant in parallel with existing conventional rod mill-ball mill circuits. Three stages of open circuit crushing were used to prepare rod mill feed. Grinding media was selected from various areas of the mine and tested separately. Impact tests on the three basic types of ore give Work Indices varying from 14.8 to 9.1 with two types appearing to be suitable as media and the third type questionable. The test mill was fed plant run ore with an average Work Index of 16.
Critical size buildup occurred in the first series of tests run, with a feed 80 passing 1 in. The size of media required for this size feed could not be obtained from the discharge of a primary crusher in commercial practice.
Using mill feed averaging 80 passing 58 in. critical size buildup occurred only when there was an excess of tramp oversize due to bin segregation and when using soft ore for grinding media. Screening mill feed at 1 in. square mesh solved the problem. It was established that rock milling could be applied to the product of a closed circuit tertiary crusher.
Media all plus 5 in. square and averaging 6 in., weighing 1015 lb. was found to be ample to perform the desired grind. Depending upon the type of ore used as media the average rate of media addition was 8 to 12 of the total feed rate, new feed plus media. Mill power was used as a guide for media additions.
The test mill drew maximum power with about a 40 load and was run with from a 35 to 40 load. With no critical size buildup and with controlled rate of media addition there was no need for crushing in the mill so the load could be carried at near maximum power level. The media wore through the critical size range at least as fast as critical size material was generated. Critical size material not being in the feed must be generated in the mill and is probably only a small percentage of the total mill charge.
The Bond Work Index Formula was used to determine the operating Work Indices for the test rock mill and the parallel rod millball mill circuits. This formula, taking into account feed size, product size and power, proved an accurate tool for comparison. The operating Work Indices compared favorably and checked laboratory Work Index data.
Mill length was the primary variable investigated in an autogenous pilot mill circuit. The 5-8217 diameter mill had both pebble ports and 8221 wide slotted grates. The plus 8221 mill product was crushed in a cone crusher and returned to the mill feed along with the minus 8221 plus 4 or 6 mesh fraction. Tests were run with a short mill, inside length of 26-388243, or diameter-to-length ratio of 2.50 to 1. The same mill was then lengthened to 48-388243, diameter-to-length ratio of 1.36 to 1.
Autogenous Pilot MillDrive 8211 30 HP, 440 V motor, speed reducer and chain driveInside diameter 8211 66 inches measured inside of shell linersShort 26-38 inches long 48-38 inches measured inside end liners.Diameter to length ratio short 2.50 to 1 long 1.36 to 1Speed 25- RPM, 77.3 of critical speed lifters, 12 x 48243 high evenly spaced.Discharge 8211 low-grate trunnionGrate 8211 inch wide slotted.
Autogenous grinding mill,gold mining. Autogenous mills, semiautogenous mills and ball mills for . supported grinding mills up to the largest sizes SAGball mill circuit incorporating pebble crushers and a POLYCOM highpressure grinding roll SAG and ball mill for gold ore grinding One of three SAG mills with 9 75 m diameter and 2 x 4000 kW drive power These mills operate in conjunction with ball.
Grinding Mill ball Mill Machine With Good Quality Semi autogenous Grinding Mill Ag Mill Autogenous Grinder from Mine Mill Supplier or Manufacturer Zhengzhou . Dry and wet autogenous grinding mill from common are large feed size . and therefore should not be used in southern China are dry autogenous grinding. Live Chat. Read More. CN103350024B Ore Feeding Speed Control .
MacPherson Autogenous Grindability Test Mining SGS. The MacPerson Autogenous Grindability Test determines the MacPherson Correlated Autogenous Work Index This can be used in conjunction with the Bond Rod and Ball Mill Work Indices to determine power requirements and to suggest circuit configurations for autogenous grinding AG and semiautogenous grinding SAG circuits.
Autogenous mills, semiautogenous mills and ball mills for . supported grinding mills up to the largest sizes SAGball mill circuit incorporating pebble crushers and a POLYCOM highpressure grinding roll SAG and ball mill for gold ore grinding One of three SAG mills with 9 75 m diameter and 2 x 4000 kW drive power These mills operate in conjunction with ball mills for iron ore grinding in Iran.