CN102505961A - Large horizontal sand silo suitable for combined filling of mortar in dressing plants and dry tailings in tailings ponds - Google Patents

Large horizontal sand silo suitable for combined filling of mortar in dressing plants and dry tailings in tailings ponds Download PDF

Info

Publication number
CN102505961A
CN102505961A CN2011103339767A CN201110333976A CN102505961A CN 102505961 A CN102505961 A CN 102505961A CN 2011103339767 A CN2011103339767 A CN 2011103339767A CN 201110333976 A CN201110333976 A CN 201110333976A CN 102505961 A CN102505961 A CN 102505961A
Authority
CN
China
Prior art keywords
sand
district
tailings
mouth
storehouse
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2011103339767A
Other languages
Chinese (zh)
Other versions
CN102505961B (en
Inventor
娄广文
吴建祥
黄凯和
路洪斌
李同鹏
唐开元
汪绍元
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sinosteel Maanshan General Institute of Mining Research Co Ltd
Original Assignee
Sinosteel Maanshan General Institute of Mining Research Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sinosteel Maanshan General Institute of Mining Research Co Ltd filed Critical Sinosteel Maanshan General Institute of Mining Research Co Ltd
Priority to CN 201110333976 priority Critical patent/CN102505961B/en
Publication of CN102505961A publication Critical patent/CN102505961A/en
Application granted granted Critical
Publication of CN102505961B publication Critical patent/CN102505961B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention discloses a large horizontal sand silo suitable for combined filling of mortar in dressing plants and dry tailings in tailings ponds. The sand silo is characterized by being divided into a mortar making region (I), a transport region (II) and a tailings storage region (III), wherein ring-shaped high-pressure water supply branch pipes (c) and high-pressure gas supply branch pipes (a) are laid in the mortar making region (I); high-pressure water spray nozzles (d) are horizontally installed on the ring-shaped high-pressure water supply branch pipes (c); high-pressure gas spray nozzles (b) are vertically installed on the high-pressure gas supply branch pipes (a); high-pressure water supply branch pipes (c) and high-pressure gas supply branch pipes (a) are laid in the transport region (II) in parallel; high-pressure water spray nozzles (d) are horizontally installed on the high-pressure water supply branch pipes (c); high-pressure gas spray nozzles (b) are vertically installed on the high-pressure gas supply branch pipes (a); the dip angle of the bottom plate of the horizontal sand silo is 23-26 degrees; the length of the mortar making region (I) along the trend of the sand silo is 3-5 meters; the length of the transport region (II) along the trend of the sand silo is 5-8 meters; and the length of the tailings storage region (III) along the trend of the sand silo is 4-7 meters. The large horizontal sand silo is applied to mortar making, can be used for realizing high-capacity continuous filling, ensuring the quality of the fillers, shortening the unsupported roof time in the goafs, reducing the construction investment of the filling stations and ensuring mine mining and filling to achieve balance and is beneficial to realization of safety production and environmental friendliness of the mines.

Description

Be suitable for the large-size horizontal sand storehouse of the dried tailings associating of ore dressing plant mortar and mine tailing storehouse filling
Technical field
The present invention relates to a kind of underground mine Filling Station and make the slurry system, the slurry system is made in the large-size horizontal sand storehouse filling that especially relates to the dried tailings associating of ore dressing plant mortar and mine tailing storehouse filling.Be applicable to that all kinds of mines adopt horizontal sand storehouse to utilize the mortar in ore dressing plant or the dried tailings in mine tailing storehouse to carry out the associating filling.
Background technology
For fully reclaiming subterranean resource, strengthen the ecological protection dynamics, filling method mining has become the mining industry Development Trend.Mining with stowing has many advantages: mine tailing is used for filling, can solves mill tailings storehouse expropriation of land difficulty, expropriation of land and build the grand problem that drops into; The character of mine tailing storehouse fine-grained solids-water has determined the danger in mine tailing storehouse, and mine tailing is used for filling, and the danger of this dangerous matter sources that can descend is cancelled this dangerous matter sources even, can solve the insurance of mine tailing storehouse and safeguard problems such as capital height; Can realize the exploitation of " three times " mineral deposit, deep-seated deposit and numerous and jumbled difficulty mining bed, improve mining recovery greatly; Can reduce the particularly discharging of solid waste of mine waste to greatest extent, the satisfied tight day by day environment maintenance standard-required of carving; Can handle the left large quantities of goafs of orderly and unordered exploitation in the past effectively, protection mine safety is produced.
Though China underground mine adopts filling technique to start late, along with attention and the input of country to aspects such as mine safety, the rate of extraction, environmental protection, and the mine is to the transformation of safety management, production theory, and filling technique more and more is widely used.
The complete tailing-filled technology of high concentration exist the obturation bleeding few, connect characteristics such as top rate height, extensively receive the generally attention of mine, designing unit.The sand storehouse is the main engineering and the link of Filling Station, also is filling system operation key of success.At present domestic sand storehouse of the most often using is a vertical sand warehouse, vertical sand warehouse at high concentration ground paste, stability of flow, connect aspect such as top, formed a cover mature technique, extensively the technology of the unit of being designed, mine employing.And the relative vertical sand warehouse in horizontal sand storehouse; Owing to have problems at filling concentration, flow, heap sand etc.; And do not obtain promoting and development, only the only a few small mine is applied at home, and (small mine is only built horizontal small sand storehouse, its small investment; Require lower to filling quality), the mine seldom adopts large-size horizontal sand storehouse to make the slurry filling.But vertical sand warehouse utilizes the mortar in ore dressing plant as pulping material usually, and again because the pulp consistency in ore dressing plant is low excessively, the mortar that is transported to the sand storehouse is through overflow post precipitation repeatedly; Just reach the filling requirement of high concentration mortar; The slurrying time is longer, can not realize continuous filling, not only influences the ore removal output in mine; It is unbalance also adopting of mine to be filled, and increases the mine unsafe factor; The mine that also has is through building large-scale concentrator; After the concentration of mortar brought up to about 40%; Be delivered to the slurrying of sand storehouse again, so not only increased investment and operating cost, the pulp consistency after concentrator concentrates does not reach the required high concentration of underground filling body yet simultaneously; Also need just can reach the slurrying desired concn through overflow post precipitation several times, the slurrying time is also longer.Simultaneously, vertical sand warehouse is overhead highly higher, builds the technology more complicated, and expense, filling cost that Filling Station is built are also all higher, and medium and small mine is difficult to bear at fund aspect.
Summary of the invention
The object of the invention is exactly to the problems referred to above that exist in the prior art; And a kind of large-size horizontal sand storehouse that is suitable for the dried tailings associating of ore dressing plant mortar and mine tailing storehouse filling is provided, and be applied to the horizontal sand of Filling Station storehouse and make the slurry system, adopt the high pressure air water to combine; It is mobile to increase saturated sand; Make the slurrying of sand storehouse not only adopt the mortar of ore dressing plant or concentrator, the more important thing is that can adopt the low concentration mortar to join dried tailings carries out filling, realize the continuity of filling as vertical sand warehouse.Make horizontal sand storehouse be able at home use and promote,, technology lower owing to horizontal sand storehouse cost more simply reaches workable, and middle-size and small-size mine adopts filling technique to be achieved; Large-scale mine is realized the down-hole mechanical continuous stoping; Improve production capacity, guarantee safety, reliable basis is provided.
For realizing above-mentioned purpose of the present invention, the technical scheme that the present invention is suitable for the large-size horizontal sand storehouse employing of the dried tailings associating of ore dressing plant mortar and mine tailing storehouse filling is:
Begin by putting the sand mouth, the trend in horizontal sand storehouse, edge is divided into making to starch distinguishes, carries and distinguish, store the sand district; Storage sand district is positioned at the downside that tailings is piled up platform.
Making the annular high service arm of slurry district laying, high-pressure air feed arm, level is installed the mouth that sprays water with high pressure on said annular high service arm, and the high-pressure jet mouth vertically is installed on said high-pressure air feed arm; Parallel laid high service arm, high-pressure air feed arm in the carrying district, level is installed the mouth that sprays water with high pressure on said high service arm, and the high-pressure jet mouth vertically is installed on said high-pressure air feed arm.
In order to let tailings in the sand storehouse, flow, and obtain 64%~73% left and right sides concentration mortar, base plate inclination angle, sand storehouse is 24~26 o, sand storehouse base plate line arrangement is installed by base plate inclination angle, sand storehouse.
Describedly make slurry district strike length is 3m~5m along the sand storehouse, main purpose is to the certain kinetic energy of sand grains, lets mortar " boiling ", the mortar of acquisition desired concn.Strike length is 5m~8m along the sand storehouse in the carrying district, mainly is to making slurry district carrying high concentration last mortar.Strike length is 4m~7m along the sand storehouse in storage sand district; Mainly be to replenish tailings continually to the carrying district; The tailings that is added is accumulated to the carrying district by storage sand district, piles up part and accounts for about 2/3 of carrying district, and the tailings of accumulation is in handling process; Through the sand washing effect of this district's water under high pressure, will roll into a ball sand or dried tailings is processed fluidised mortar.Along with tailings is starched the carrying of distinguishing to making, the tailings in storage sand district is simultaneously to carrying district's supply.
Array pitch is 500mm~700mm between the high-pressure jet mouth of making the slurry district; The spacing of annular high service arm is 600mm~800mm; The mouth spacing that sprays water with high pressure on every water supply arm is 800mm~1000mm; But the mouth interlaced arrangement that sprays water with high pressure between row and row obtains good fluidity, the higher saturated sand of concentration with this.
Array pitch is 700mm~1000mm between the high-pressure jet mouth in carrying district, the array pitch 1000mm of high service arm~1500mm, and the mouth spacing that sprays water with high pressure on every high service arm is 1500mm~2000mm.The described mouth that sprays water with high pressure is intermediate arrangement along the sand storehouse, and water spraying direction is towards the sand export direction in sand storehouse.
Length direction is 4m~7m along the sand storehouse in storage sand district, mainly is to replenish tailings continually to the carrying district, does not arrange any pipeline in this zone.Lianping, upper end platform and ramp in horizontal sand storehouse are used for transporting tailings and replenish the sand tail to storage sand district.
The present invention transports the mortar from the ore dressing plant to horizontal sand storehouse earlier in actual use, fills with tailings to storage sand district simultaneously, and tailings accounts for about 2/3 of carrying district along the length in sand storehouse; Slurry district high pressure water jet pipe is made in unlatching, lets tailings become saturated sand, behind unlatching 10min~15min, opens high pressure and makes the slurry pipe, and saturated sand is carried out disturbance, lets tailings further obtain certain kinetic energy; Open stirring system and carry out filling.The liter a large amount of waterborne of making the mouth that sprays water with high pressure (one way valve) ejection in slurry district becomes covering water, when concentration is low to some extent, and can suitably stop using sparge pipe, air jet pipe, employing is calmed the anger on a small quantity and is added low amounts of water tailings is carried out disturbance, is as the criterion a sand not occur.In stowing operation, the concentration that records mortar is crossed when hanging down, and begins by putting sand mouth one end, opens carrying district high-pressure water pipe one by one, makes tailings have flowability, opens the air pipe that carrying is distinguished simultaneously, and tailings is carried out disturbance, and tailings is flowed to making the slurry district; When the sand heap in storage sand district descends, can in time replenish dried tailings by platform to storage sand district.
After above technical scheme is adopted in the large-size horizontal sand storehouse that the present invention is suitable for the dried tailings associating of ore dressing plant mortar and mine tailing storehouse filling, have following effect:
(1) adopts that water under high pressure is depressed to be closed, solve horizontal sand warehousing, make of the application of horizontal sand storehouse have promotional value in the mine in shortcoming.
(2) broken general mine and only adopted the ore dressing plant mortar to carry out overflow, deposition pulping technique, realized that mortar and dried tailings mutually combine, made Filling Station realize the continuous filling of big production capacity.
(3) adopt this technology, make technology simpler, strong operability.
(4) reduced the cost of Filling Station construction and filling, protected environment, helped promoting filling method mining in middle-size and small-size mine.
Description of drawings
Fig. 1 be the present invention be suitable for the dried tailings associating of ore dressing plant mortar and mine tailing storehouse filling large-size horizontal sand storehouse level to perspective view;
Fig. 2 is the figure of large-size horizontal sand storehouse longitudinal projection that the present invention is suitable for the dried tailings associating of ore dressing plant mortar and mine tailing storehouse filling.
Reference numeral is:
I-make slurry to distinguish; II-carrying district; III-storage sand district; A-high-pressure air feed arm; B-high-pressure jet mouth; C-high service arm; The d-mouth that sprays water with high pressure; 1.-tailings piles up the tailings of piling up on the platform; 2.-storage sand.
The specific embodiment
For further describing the present invention, further explain is done in the large-size horizontal sand storehouse that the present invention is suitable for the dried tailings associating of ore dressing plant mortar and mine tailing storehouse filling below in conjunction with accompanying drawing.
The large-size horizontal sand storehouse level that is suitable for the dried tailings associating of ore dressing plant mortar and mine tailing storehouse filling by the present invention shown in Figure 1 is to perspective view and combine Fig. 2 to find out, begins by putting the sand mouth, is divided into along the trend in horizontal sand storehouse and makes slurry district I, carrying district II, storage sand district III; Base plate inclination angle, horizontal sand storehouse is 25 o, strike length is 4m along the sand storehouse to make slurry district I, and strike length is 7m to carrying district II along the sand storehouse, and strike length is 6m to storage sand district III along the sand storehouse.
Lay annular high service arm c, high-pressure air feed arm a making slurry district's I, level is installed the mouth d that sprays water with high pressure on said annular high service arm c, and high-pressure jet mouth b vertically is installed on said high-pressure air feed arm a; Make that array pitch is 600mm between the high-pressure jet mouth b of slurry district's I, the spacing of annular high service arm c is 700mm, and the mouth d spacing that sprays water with high pressure on every high service arm c is 850mm; The described mouth d that sprays water with high pressure adopts the one way valve that sprays water with high pressure, the one way valve interlaced arrangement that sprays water with high pressure between row and row.The one way valve diameter that sprays water with high pressure is 4 scruples.
II parallel laid high service arm c, high-pressure air feed arm a in the carrying district, level is installed the mouth d that sprays water with high pressure on said high service arm c, and high-pressure jet mouth b vertically is installed on said high-pressure air feed arm a.Array pitch is 800mm between high-pressure jet mouth b, and the mouth d spacing that sprays water with high pressure on the array pitch 1200mm of high service arm c, every high service arm c is 1800mm.It is the one way valve that sprays water with high pressure of 4 scruples that the described mouth d that sprays water with high pressure adopts diameter, the intermediate arrangement along the sand storehouse, and water spraying direction is towards the sand export direction in sand storehouse.
Tailings is piled up the tailings of piling up on the platform and 1. can be added to storage sand district III by small-sized forklift, and 2. storage sand be accumulated to carrying district II, and account for 2/3 of carrying district.
In underground mine is tailing-filled, adopt the present invention, can effectively reduce the slurrying time, reduce tailings storehouse accumulating amount, guarantee the concentration of filling slurry, and the continuous filling that realizes Filling Station, adopting of mine filled reach balance, help the mine and realize safety in production.

Claims (2)

1. large-size horizontal sand storehouse that is suitable for the dried tailings associating of ore dressing plant mortar and mine tailing storehouse filling is characterized in that:
Begin by putting the sand mouth, be divided into along the trend in horizontal sand storehouse and make slurry district (I), carrying district (II), storage sand district (III); Making slurry district (I) laying annular high service arm (c), high-pressure air feed arm (a); Go up level at said annular high service arm (c) mouth (d) that sprays water with high pressure is installed, go up at said high-pressure air feed arm (a) high-pressure jet mouth (b) vertically is installed; (II) parallel laid high service arm (c), high-pressure air feed arm (a) are gone up level at said high service arm (c) mouth (d) that sprays water with high pressure are installed in the carrying district, go up at said high-pressure air feed arm (a) high-pressure jet mouth (b) vertically is installed; Storage sand district (III) is positioned at the downside that tailings is piled up platform;
Base plate inclination angle, described horizontal sand storehouse is 23~26 o, sand storehouse base plate line arrangement is installed by base plate inclination angle, sand storehouse; Describedly make slurry district's (I) strike length is 3m~5m along the sand storehouse, strike length is 5m~8m along the sand storehouse in carrying district (II), and strike length is 4m~7m along the sand storehouse in storage sand district (III);
Array pitch is 500mm~700mm between the said high-pressure jet mouth (b) of making slurry district's (I), and the array pitch of annular high service arm (c) is 600mm~800mm, and mouth (d) spacing that sprays water with high pressure on every water supply arm (c) is 800mm~1000mm; Array pitch is 700mm~1000mm between the high-pressure jet mouth (b) in carrying district (II), the array pitch 1000mm~1500mm of high service arm (c), and mouth (d) spacing that sprays water with high pressure on every water supply arm (c) is 1500mm~2000mm.
2. the large-size horizontal sand storehouse that is suitable for the dried tailings associating of ore dressing plant mortar and mine tailing storehouse filling as claimed in claim 1 is characterized in that: making slurry district (I), the mouth that sprays water with high pressure (d) interlaced arrangement between row and row; Distinguish the sand export direction of the mouth that sprays water with high pressure (d) water spraying direction of (II) in carrying towards the sand storehouse.
CN 201110333976 2011-10-28 2011-10-28 Large horizontal sand silo suitable for combined filling of mortar in dressing plants and dry tailings in tailings ponds Active CN102505961B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201110333976 CN102505961B (en) 2011-10-28 2011-10-28 Large horizontal sand silo suitable for combined filling of mortar in dressing plants and dry tailings in tailings ponds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201110333976 CN102505961B (en) 2011-10-28 2011-10-28 Large horizontal sand silo suitable for combined filling of mortar in dressing plants and dry tailings in tailings ponds

Publications (2)

Publication Number Publication Date
CN102505961A true CN102505961A (en) 2012-06-20
CN102505961B CN102505961B (en) 2013-12-18

Family

ID=46218089

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201110333976 Active CN102505961B (en) 2011-10-28 2011-10-28 Large horizontal sand silo suitable for combined filling of mortar in dressing plants and dry tailings in tailings ponds

Country Status (1)

Country Link
CN (1) CN102505961B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103963162A (en) * 2014-05-23 2014-08-06 山东华联矿业股份有限公司 Vertical sand silo mud-making device
CN105626143A (en) * 2015-11-18 2016-06-01 铜陵有色设计研究院 Horizontal sand bin capable of achieving simple filling and efficient sand fluffing
CN107587895A (en) * 2017-11-03 2018-01-16 山东黄金矿业股份有限公司新城金矿 A kind of high concentration put sand, Automated condtrol underground goaf filling system
CN108036969A (en) * 2017-11-21 2018-05-15 贵州理工学院 From the method for mining tailing wasteland extraction CHARACTERISTICS OF TAILINGS SAND sample

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3333433A1 (en) * 1983-09-09 1985-03-21 Maschinenfabrik Karl Brieden & Co, 4630 Bochum System for dispensing pasty to milky filling and injection material consisting of hydraulic construction materials in underground operation, preferably for supplying driving works in mining and tunnel construction
JPH0828200A (en) * 1994-07-18 1996-01-30 Hidemichi Hida Filling of space part
CN101358540A (en) * 2007-07-31 2009-02-04 中国恩菲工程技术有限公司 Sand warehouse for filling device
CN201334925Y (en) * 2009-01-15 2009-10-28 长沙有色冶金设计研究院 Horizontal sand silo for mine filling

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3333433A1 (en) * 1983-09-09 1985-03-21 Maschinenfabrik Karl Brieden & Co, 4630 Bochum System for dispensing pasty to milky filling and injection material consisting of hydraulic construction materials in underground operation, preferably for supplying driving works in mining and tunnel construction
JPH0828200A (en) * 1994-07-18 1996-01-30 Hidemichi Hida Filling of space part
CN101358540A (en) * 2007-07-31 2009-02-04 中国恩菲工程技术有限公司 Sand warehouse for filling device
CN201334925Y (en) * 2009-01-15 2009-10-28 长沙有色冶金设计研究院 Horizontal sand silo for mine filling

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103963162A (en) * 2014-05-23 2014-08-06 山东华联矿业股份有限公司 Vertical sand silo mud-making device
CN105626143A (en) * 2015-11-18 2016-06-01 铜陵有色设计研究院 Horizontal sand bin capable of achieving simple filling and efficient sand fluffing
CN105626143B (en) * 2015-11-18 2019-02-26 铜陵有色设计研究院 It is a kind of it is simple filling, the efficient fluffing of moulding sand horizontal sand warehouse
CN107587895A (en) * 2017-11-03 2018-01-16 山东黄金矿业股份有限公司新城金矿 A kind of high concentration put sand, Automated condtrol underground goaf filling system
CN107587895B (en) * 2017-11-03 2023-08-11 山东黄金矿业股份有限公司新城金矿 High-concentration sand discharge and automatic control underground goaf filling system
CN108036969A (en) * 2017-11-21 2018-05-15 贵州理工学院 From the method for mining tailing wasteland extraction CHARACTERISTICS OF TAILINGS SAND sample

Also Published As

Publication number Publication date
CN102505961B (en) 2013-12-18

Similar Documents

Publication Publication Date Title
CN102367741B (en) Mortar making system and process suitable for large horizontal sand silo of mine filling station
CN106321103A (en) Method for recycling room coal pillars by solid filling in synergy with artificial pillars
CN102505961A (en) Large horizontal sand silo suitable for combined filling of mortar in dressing plants and dry tailings in tailings ponds
CN102979571A (en) All tailing sand dry discharge bonding filling system and filling method of filling system
CN101555107A (en) Coal mine consolidated fill technical skill
CN108941146A (en) A kind of barren rock and crude tailings mixing stacked arrangement
CN103010768B (en) Closed bulk material warehouse
CN202046613U (en) Internal material conveying structure of silo
CN204769204U (en) Pond method of filling out sediment thick liquid conveyor that builds a dam
CN105780784A (en) Method suitable for conducting dry heaping on fine grained tailings on flat ground or beside mountain
CN202300517U (en) Large-scale horizontal sand silo for underground mine filling
CN201050384Y (en) Device for preparing high-concentration full-tailing slurry for mine filling
CN105151628B (en) A kind of stock ground
CN101781691B (en) Blast-furnace slag processing system
CN203783634U (en) Mineral powder recycling structure for underground mine
CN102865102A (en) Self-flowing concrete convex and concave self-connection filling method
CN201071226Y (en) Mechanization horizontal warehouse
CN216974901U (en) Double-transportation single-filling hydraulic support
CN202935956U (en) Closed bulk material warehouse
CN205400806U (en) Handle mining filling system in collecting space area
CN205329823U (en) Tail washings drainage guide conveyor in tailing storehouse in mining
CN201606112U (en) 300-cubic meter stirring type high-water expanding material filling complete equipment
CN202627615U (en) Round coal-yard coal bulkhead
CN204872442U (en) Seal stock ground
CN201554495U (en) Tray type vertical continuous solid material feeding system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder

Address after: 243000 Xitang Road, Ma'anshan Economic Development Zone, Anhui, No. 666

Patentee after: MAANSHAN Mine Research Institute Co.,Ltd.

Address before: 243000 Xitang Road, Ma'anshan Economic Development Zone, Anhui, No. 666

Patentee before: SINOSTEEL MAANSHAN INSTITUTE OF MINING RESEARCH Co.,Ltd.

CP01 Change in the name or title of a patent holder