CN104549663A - Ore grinding medium, and production apparatus and production method thereof - Google Patents
Ore grinding medium, and production apparatus and production method thereof Download PDFInfo
- Publication number
- CN104549663A CN104549663A CN201310469030.2A CN201310469030A CN104549663A CN 104549663 A CN104549663 A CN 104549663A CN 201310469030 A CN201310469030 A CN 201310469030A CN 104549663 A CN104549663 A CN 104549663A
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- prism
- frustum
- milling medium
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- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000000227 grinding Methods 0.000 title abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000003801 milling Methods 0.000 claims description 71
- 239000000463 material Substances 0.000 claims description 13
- 238000005242 forging Methods 0.000 claims description 10
- 239000011265 semifinished product Substances 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 4
- 238000010791 quenching Methods 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- 238000005496 tempering Methods 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 3
- 239000013067 intermediate product Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/20—Disintegrating members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
- B21J5/025—Closed die forging
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Milling Processes (AREA)
- Adjustment And Processing Of Grains (AREA)
Abstract
The invention relates to an ore grinding medium. The ore grinding medium comprises a first prism, a first frustum outwardly extending from the bottom of the first prism, a second prism outwardly extending from the top surface of the first prism, and a second frustum outwardly extending from the top surface of the second prism, the central axes of the first prism, the second prism, the first frustum and the second frustum are coincident, the cross section area of the first frustum gradually becomes smaller with its outward extension, the cross section area of the second frustum gradually becomes smaller with its outward extension, the top surface of the first frustum is same to the bottom surface of the first prism in shape and area, the bottom surface of the second frustum is same to the top surface of the second prism in shape and area, and the quantity of the side surfaces of each of the first prism and the second prism is not smaller than 3. The invention also relates to an apparatus for producing the ore grinding medium, and a method thereof.
Description
Technical field
The present invention relates to a kind of milling medium, particularly relate to a kind of milling medium used in ore mill, the invention still further relates to a kind of apparatus and method for the production of milling medium.
Background technology
In ore dressing industry, the shape of milling medium, size, material and add the consumption that quality directly can affect grinding efficiency, metal recovery rate and metal material.Therefore, about the shape of milling medium, size, material Quality Research be the research emphasis of this area always.
The milling medium that uses in current ore mill (or claiming abrasive body) is generally spheroidal, cylindrical, truncated cone-shaped etc., for spheroidal medium, put to grind with point cantact mode with ore in ore mill, be unfavorable for carrying out fine grinding, but often caused thick and caused metal loss, make metal material consumption large, reduce grinding efficiency.For cylindrical and truncated cone-shaped milling medium, although that they include the way of contact of point, line, surface, grinding particle size is thick, is suitable for corase grind, middle mill, but is unsuitable for fine grinding.And each cylinder, circle edge of table can be cut on lining board of grinder and cause mutual cutting between milling medium, thus the aggravation consumption of milling medium and the wearing and tearing of lining board of grinder.
For solving the problem, patent of invention WO2013007076A1 discloses a kind of milling medium, and it comprises the polygonal prism cylinder being positioned at stage casing, the frustum extended to two ends from the bottom surface of polygonal prism cylinder.
Above-mentioned milling medium to some extent solves spheroidal, cylindrical and problem existing for truncated cone-shaped milling medium.But due to the structure that it adopts polygonal prism cylinder and frustum to engage, therefore the mode of casting is mostly used to produce, cause in the process of producing this milling medium, the intermediate products of milling medium may with a large amount of burrs and overlap, and this intermediate products need to expend the more time and expense cuts and is polished into finished product.Therefore, the production efficiency of above-mentioned milling medium and yields all lower.
Summary of the invention
In order to improve production efficiency and the yields of milling medium, the invention provides a kind of milling medium, it comprises bottom and top, bottom comprises the first prism and from the bottom surface of the first prism to the first frustum of downward-extension, top comprises the second prism upwards extended from the end face of the first prism and the second frustum upwards extended from the end face of the second prism.
Preferably, the central axis of the first prism, the second prism, the first frustum and the second frustum all overlaps, the cross-sectional area of the first frustum stretches out along with it and diminishes gradually, the cross-sectional area of the second frustum stretches out along with it and diminishes gradually, the shape of the end face of the first frustum is identical respectively with area with the shape of the bottom surface of the first prism with area, and the shape of the bottom surface of the second frustum is identical respectively with area with the shape of the end face of the second prism with area.
Preferably, the first prism and the second prism are regular prism or slant edge cylinder, and the first frustum and the second frustum are positive frustum or oblique cone platform.
Preferably, the number of the side of the first prism and the second prism is more than 3 or 3, preferably 4,5,6,7,8,9,10,11 or 12.
Preferably, the shape of the bottom surface of the first frustum is polygon, and the side of the first frustum is plane; And/or second the shape of end face of frustum be polygon, the side of the second frustum is plane.
Preferably, the shape of the bottom surface of the first frustum is circular, and the side of the first frustum is the curved surface being transitioned into the arc surface section away from the first prism by the planar section near the first prism; And/or second the shape of end face of frustum be circular, the side of the second frustum is the curved surface being transitioned into the arc surface section away from the second prism by the planar section near the second prism.
Preferably, transition sleekly between each side of the first prism and the second prism.
Present invention also offers a kind of device for the production of milling medium, it comprises mold and bed die, it is characterized in that, boss portion is formed downwards from the bottom surface of mold, the first die cavity with the shaped upper part complementation milling medium is upwards formed from the bottom center of boss portion, form the recess with boss portion shape complementarity downwards from the end face of bed die, form the second die cavity with the lower shape complementation milling medium downwards from the bottom center of recess.
Preferably, boss portion can insert recess completely, thus the end face of bed die closely can be engaged with the bottom surface of mold.
Present invention also offers a kind of said apparatus that uses for the production of the method for above-mentioned milling medium, it comprises the following steps: be fixed on by bed die on the mold base of die forging machine; Mold is fixed on the tup of die forging machine; The blank material of prism-shaped is inserted in the prismatic hole on bed die; Start die forging machine, to make mold and bed die closely engage, and continue for some time; Operation die forging machine makes mold remove with bed die to engage; Milling medium semi-finished product in bed die are taken out, and subsequently it is quenched; Isothermal annealing is carried out to the complete milling medium semi-finished product of quenching; And the milling medium semi-finished product complete to isothermal annealing carry out tempering, to obtain milling medium.
Preferably, the shape of the cross section of blank material is identical with the shape of the cross section of the first prism, and the cross-sectional area of blank material is less than the cross-sectional area of the first prism, the length of described blank material be greater than the first cavity depth and the second cavity depth and.
Accompanying drawing explanation
Fig. 1 is the stereogram of the milling medium according to the first embodiment of the present invention.
Fig. 2 is the front view of the milling medium according to the first embodiment of the present invention.
Fig. 3 is the top view that multiple milling medium according to the first embodiment of the present invention becomes parallel placement in array.
Fig. 4 is the stereogram for the production of the mold in the method for the milling medium according to the first embodiment of the present invention.
Fig. 5 is the stereogram for the production of the bed die in the method for the milling medium according to the first embodiment of the present invention.
Fig. 6 is the stereogram of milling medium according to a second embodiment of the present invention.
Fig. 7 is the stereogram of milling medium according to the third embodiment of the invention.
Fig. 8 is the stereogram of milling medium according to a fourth embodiment of the invention.
Detailed description of the invention
Below with reference to the accompanying drawings embodiments of the invention are described.Accompanying drawing is described for positive six prisms, regular triangular prism and four-prism respectively, and illustrating that the number of the side of the first prism of the present invention and the second prism both can be odd number, also can be even number.
Shown in Fig. 1 and 2 is solid according to the milling medium 1 of the first embodiment of the present invention and front view.As shown in the figure, milling medium 1 comprises: bottom B and top A, bottom B comprises the first prism 2 and from the bottom surface of the first prism to the first frustum 3 of downward-extension, top A comprises the second prism 4 upwards extended from the end face of the first prism and the second frustum 5 upwards extended from the end face of the second prism.
The central axis of the first prism 2, second prism 4, first frustum 3 and the second frustum 5 all overlaps, the cross-sectional area of the first frustum 3 stretches out along with it and diminishes gradually, the cross-sectional area of the second frustum 5 stretches out along with it and diminishes gradually, the shape of the end face of the first frustum 3 is identical respectively with area with the shape of the bottom surface of the first prism 2 with area, and the shape of the bottom surface of the second frustum 5 is identical respectively with area with the shape of the end face of the second prism 4 with area.
In the present embodiment, the shape of the bottom surface of the first frustum 3 is circular, and the side of the first frustum 3 is the curved surfaces being transitioned into the arc surface section away from the first prism 2 by the planar section near the first prism 2.The shape of the end face of the second frustum 5 is circular, and the side of the second frustum 5 is the curved surfaces being transitioned into the arc surface section away from the second prism 4 by the planar section near the second prism 4.
Wherein, the length of the first prism 2 is L1, and the length of the second prism 4 is L2, and the external diameter of a circle in bottom surface of the first prism 2 is D1, and the external diameter of a circle in bottom surface of the second prism 4 is D2.In the present embodiment, diameter D1 is greater than diameter D2, and diameter D1 be greater than length L1 and length L2 and.According to practice, preferably, length L1 and length L2's and with the ratio (L1+L2) of diameter D1: D1 is in the scope of 0.3 ~ 5.
Because the first prism 2 of milling medium 1 and the second prism 4 are six prisms be made up of six planes, therefore in grinding process, the way of contact is face contact and linear contact lay substantially, and wherein the ratio of face contact is larger.
Shown in Fig. 3 is the top view of multiple milling medium 1 one-tenth according to the first embodiment of the present invention parallel placement in array.Because the first prism 2 is positive six prisms, therefore when the parallel placement in array of multiple milling medium 1 one-tenth, can not gap be produced therebetween, thus can not exist because be mixed in gap the mineral microparticle being difficult to be polished.Like this, grinding efficiency is improved, and reduces the wearing and tearing of milling medium and lining board of grinder simultaneously.
Fig. 4 and Fig. 5 respectively illustrates the stereogram for the production of the mold 6 in the method for the milling medium 1 according to the first embodiment of the present invention and bed die 7, wherein, boss portion 8 is formed downwards from the bottom surface of mold 6, the first die cavity A ' with the top A shape complementarity described milling medium is upwards formed from the bottom center of boss portion 8, form the recess 8 ' with boss portion 8 shape complementarity downwards from the end face of bed die 7, form the second die cavity B ' with the bottom B shape complementarity described milling medium downwards from the bottom center of recess 8 '.
In the present embodiment, the area of section of recess 8 ' is greater than the area of section of boss portion 8 slightly, and to make when die forging machine is activated, boss portion 8 can be inserted in recess 8 ' completely, thus the bottom surface of mold 6 can be engaged with the end face of bed die 7.Consequently, can by the milling medium 1 in blank forging cost implementation.
In the present embodiment, the shape of the cross section of blank material is identical with the shape of the cross section of the first prism 2, the cross-sectional area of described blank material is less than the cross-sectional area of the first prism 2, the length of described blank material be greater than the degree of depth of the first die cavity A ' and the degree of depth of the second die cavity B ' and.
Shown in Fig. 6 is the stereogram of milling medium 201 according to a second embodiment of the present invention.As shown in the figure, milling medium 201 comprises: bottom B2 and top A2, bottom B2 comprises the first prism 202 and from the bottom surface of the first prism to the first frustum 203 of downward-extension, top A2 comprises the second prism 204 upwards extended from the end face of the first prism and the second frustum 205 upwards extended from the end face of the second prism.
The central axis of the first prism 202, second prism 204, first frustum 203 and the second frustum 205 all overlaps, the cross-sectional area of the first frustum 203 stretches out along with it and diminishes gradually, the cross-sectional area of the second frustum 205 stretches out along with it and diminishes gradually, the shape of the end face of the first frustum 203 is identical respectively with area with the shape of the bottom surface of the first prism 202 with area, and the shape of the bottom surface of the second frustum 205 is identical respectively with area with the shape of the end face of the second prism 204 with area.
In the present embodiment, the first prism 202 and the second prism 204 are all positive hexagonal prisms, and the first frustum 203 and the second frustum 205 are all positive hexagonal pyramid platforms.
Because the first prism 202 is positive six prisms, the milling medium 201 therefore in the present embodiment can obtain the advantage identical with the milling medium 1 in the first embodiment.
Shown in Fig. 7 is the stereogram of milling medium 301 according to the third embodiment of the invention.As shown in the figure, milling medium 301 comprises: bottom B3 and top A3, bottom B3 comprises the first prism 302 and from the bottom surface of the first prism to the first frustum 303 of downward-extension, top A3 comprises the second prism 304 upwards extended from the end face of the first prism and the second frustum 305 upwards extended from the end face of the second prism.
The central axis of the first prism 302, second prism 304, first frustum 303 and the second frustum 305 all overlaps, the cross-sectional area of the first frustum 303 stretches out along with it and diminishes gradually, the cross-sectional area of the second frustum 305 stretches out along with it and diminishes gradually, the shape of the end face of the first frustum 303 is identical respectively with area with the shape of the bottom surface of the first prism 302 with area, and the shape of the bottom surface of the second frustum 305 is identical respectively with area with the shape of the end face of the second prism 304 with area.
In the present embodiment, the first prism 302 and the second prism 304 are all four-prisms, and the first frustum 303 and the second frustum 305 are all positive tetragonous cone tables.
Because the first prism 302 is four-prisms, the milling medium 301 therefore in the present embodiment can obtain the advantage identical with the milling medium 1 in the first embodiment.
Shown in Fig. 8 is the stereogram of milling medium 401 according to a fourth embodiment of the invention.As shown in the figure, milling medium 401 comprises: bottom B4 and top A4, bottom B4 comprises the first prism 402 and from the bottom surface of the first prism to the first frustum 403 of downward-extension, top A4 comprises the second prism 404 upwards extended from the end face of the first prism and the second frustum 405 upwards extended from the end face of the second prism.
The central axis of the first prism 402, second prism 404, first frustum 403 and the second frustum 405 all overlaps, the cross-sectional area of the first frustum 403 stretches out along with it and diminishes gradually, the cross-sectional area of the second frustum 405 stretches out along with it and diminishes gradually, the shape of the end face of the first frustum 403 is identical respectively with area with the shape of the bottom surface of the first prism 402 with area, and the shape of the bottom surface of the second frustum 405 is identical respectively with area with the shape of the end face of the second prism 404 with area.
In the present embodiment, the first prism 402 and the second prism 404 are all positive three prisms, and the first frustum 403 and the second frustum 405 are all positive Rhizoma Sparganii frustums.
Because the first prism 402 is regular triangular prisms, the milling medium 401 therefore in the present embodiment can obtain the advantage identical with the milling medium 1 in the first embodiment.
According to above-described embodiment, no matter it will be appreciated by those skilled in the art that the number of sides of prism is odd number or even number, all drop in protection scope of the present invention.
Although describe specific embodiment of the present invention here in detail, the object that they are only used to explain provides, and should not think that they are construed as limiting scope of the present invention.Without departing from the spirit and scope of the present invention, various replacement, change and transformation can be made to the present invention.
Claims (10)
1. a milling medium, it comprises bottom and top, bottom comprises the first prism and from the bottom surface of the first prism to the first frustum of downward-extension, top comprises the second prism of upwards extending from the end face of the first prism and from the second frustum that the end face of the second prism upwards extends, it is characterized in that:
The central axis of the first prism, the second prism, the first frustum and the second frustum all overlaps, the cross-sectional area of the first frustum stretches out along with it and diminishes gradually, the cross-sectional area of the second frustum stretches out along with it and diminishes gradually, the shape of the end face of the first frustum is identical respectively with area with the shape of the bottom surface of the first prism with area, and the shape of the bottom surface of the second frustum is identical respectively with area with the shape of the end face of the second prism with area.
2. milling medium as claimed in claim 1, it is characterized in that, described first prism and the second prism are regular prism or slant edge cylinder, and described first frustum and the second frustum are positive frustum or oblique cone platform.
3. milling medium as claimed in claim 1 or 2, it is characterized in that, the number of the side of described first prism and the second prism is more than 3 or 3, preferably 4,5,6,7,8,9,10,11 or 12.
4. the milling medium as described in one of claim 1-3, is characterized in that, the shape of the bottom surface of described first frustum is polygon, and the side of described first frustum is plane; And/or
The shape of the end face of described second frustum is polygon, and the side of described second frustum is plane.
5. the milling medium as described in one of claim 1-3, it is characterized in that, the shape of the bottom surface of described first frustum is circular, and the side of described first frustum is the curved surface being transitioned into the arc surface section away from the first prism by the planar section near the first prism; And/or
The shape of the end face of described second frustum is circular, and the side of described second frustum is the curved surface being transitioned into the arc surface section away from the second prism by the planar section near the second prism.
6. the milling medium as described in one of claim 1-5, is characterized in that, transition sleekly between described first prism and each side of the second prism.
7. the device for the production of milling medium as claimed in claim 1, it comprises mold and bed die, it is characterized in that, boss portion is formed downwards from the bottom surface of mold, the first die cavity with the shaped upper part complementation described milling medium is upwards formed from the bottom center of boss portion, form the recess with boss portion shape complementarity downwards from the end face of bed die, form the second die cavity with the lower shape complementation described milling medium downwards from the bottom center of recess.
8. device as claimed in claim 7, it is characterized in that, described boss portion can insert recess completely, thus the end face of bed die closely can be engaged with the bottom surface of mold.
9. use device as claimed in claim 7 for the production of a method for milling medium as claimed in claim 1, it comprises the following steps:
Bed die is fixed on the mold base of die forging machine;
Mold is fixed on the tup of die forging machine;
The blank material of prism-shaped is inserted in the prismatic hole on bed die;
Start die forging machine, to make mold and bed die closely engage, and continue for some time;
Operation die forging machine makes mold remove with bed die to engage;
Milling medium semi-finished product in bed die are taken out, and subsequently it is quenched;
Isothermal annealing is carried out to the complete milling medium semi-finished product of quenching; And
The milling medium semi-finished product complete to isothermal annealing carry out tempering, to obtain milling medium.
10. method as claimed in claim 9, it is characterized in that, the shape of the cross section of described blank material is identical with the shape of the cross section of the first prism, the cross-sectional area of described blank material is less than the cross-sectional area of the first prism, the length of described blank material be greater than the first cavity depth and the second cavity depth and.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310469030.2A CN104549663B (en) | 2013-10-10 | 2013-10-10 | Milling medium and device and method for producing milling medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310469030.2A CN104549663B (en) | 2013-10-10 | 2013-10-10 | Milling medium and device and method for producing milling medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104549663A true CN104549663A (en) | 2015-04-29 |
| CN104549663B CN104549663B (en) | 2018-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310469030.2A Expired - Fee Related CN104549663B (en) | 2013-10-10 | 2013-10-10 | Milling medium and device and method for producing milling medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104549663B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108970731A (en) * | 2018-05-16 | 2018-12-11 | 铜陵有色金属集团股份有限公司 | Polyhedron milling medium and its forging mold and forging method for semi-autogenous mill |
| CN113509969A (en) * | 2021-04-28 | 2021-10-19 | 湖州中赢节能科技有限公司 | Grinder grinding body with improved grinding efficiency |
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| GB261664A (en) * | 1926-08-04 | 1926-11-25 | Otto Kordt | Improvements in grinding bodies for ball-, drum- and tubular mills |
| US1864542A (en) * | 1929-06-11 | 1932-06-28 | Krupp Fried Grusonwerk Ag | Grinding body |
| CN102443741A (en) * | 2011-11-15 | 2012-05-09 | 攀钢集团工程技术有限公司 | Steel ball for ball mill and manufacturing method thereof |
| CN202238201U (en) * | 2011-09-27 | 2012-05-30 | 山东华民钢球股份有限公司 | Special polyhedral milling steel ball for mines |
| CN202506446U (en) * | 2011-07-12 | 2012-10-31 | 谢兆宗 | Ore grinding medium |
| CN203610183U (en) * | 2013-10-10 | 2014-05-28 | 谢兆宗 | Ore grinding medium and device used for producing ore grinding medium |
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2013
- 2013-10-10 CN CN201310469030.2A patent/CN104549663B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB261664A (en) * | 1926-08-04 | 1926-11-25 | Otto Kordt | Improvements in grinding bodies for ball-, drum- and tubular mills |
| US1864542A (en) * | 1929-06-11 | 1932-06-28 | Krupp Fried Grusonwerk Ag | Grinding body |
| CN202506446U (en) * | 2011-07-12 | 2012-10-31 | 谢兆宗 | Ore grinding medium |
| CN202238201U (en) * | 2011-09-27 | 2012-05-30 | 山东华民钢球股份有限公司 | Special polyhedral milling steel ball for mines |
| CN102443741A (en) * | 2011-11-15 | 2012-05-09 | 攀钢集团工程技术有限公司 | Steel ball for ball mill and manufacturing method thereof |
| CN203610183U (en) * | 2013-10-10 | 2014-05-28 | 谢兆宗 | Ore grinding medium and device used for producing ore grinding medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108970731A (en) * | 2018-05-16 | 2018-12-11 | 铜陵有色金属集团股份有限公司 | Polyhedron milling medium and its forging mold and forging method for semi-autogenous mill |
| CN113509969A (en) * | 2021-04-28 | 2021-10-19 | 湖州中赢节能科技有限公司 | Grinder grinding body with improved grinding efficiency |
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| Publication number | Publication date |
|---|---|
| CN104549663B (en) | 2018-07-31 |
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Effective date of registration: 20210525 Address after: 067000 No.52, Shiyou Road, Dadong District, Xinglong Town, Xinglong County, Chengde City, Hebei Province Patentee after: Hebei Shouding Metal Materials Co.,Ltd. Address before: 067300 Room 102, building 4, Dongguan warm home community, Xinglong County, Chengde City, Hebei Province Patentee before: Xie Zhaozong |
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