Delfgauw

Krimpen a/d

IJsse

l

Kinderdijk

Sliedrech

t

Hardinxveld-Giesse

ndam

Apeldoorn

Heusden

Dordrecht

Hendrik-Id

o-Ambacht

Goes

Emmeloord

The Netherlands

TangguDalian

Houston, TXWayne, NJ

Riding MillBlandford Forum

Komarno

Lagos

St. Petersburg

DubaiNew Delhi

Mumbai

Singapore

Guangzhou

TianjinBeijingBelgrade

Head Offi ce IHC Merwede

Sliedrecht, The Netherlands

Shipyards

Dalian, P.R. of ChinaHardinxveld-Giessendam, The NetherlandsHendrik-Ido-Ambacht, The NetherlandsHeusden, The NetherlandsKinderdijk, The NetherlandsKrimpen aan den IJssel, The NetherlandsSliedrecht, The Netherlands

Sites

Apeldoorn, The NetherlandsBelgrade, SerbiaBlandford Forum, U.K.Delfgauw, The NetherlandsDordrecht, The NetherlandsEmmeloord, The NetherlandsGoes, The NetherlandsHardinxveld-Giessendam, The NetherlandsHendrik Ido Ambacht, The NetherlandsHeusden, The NetherlandsHouston, TX, USAKinderdijk, The NetherlandsKomarno - SlovakiaRiding Mill, U.K.Sliedrecht, The NetherlandsWayne, NJ, USA

IHC Technical Services

As a division of the Original Equipment Manufacturer (OEM) IHC Merwede, IHC Technical Services has access to unique knowledge bases and capabiliti es for the improvement of the operati onal performance of dredging fl eets and reducti on of its total costs of ownership. Dedicated technical specialists around the world can assist any contractor on-site and be the partner to increase the performance and acti ve period of the dredging equipment. IHC Technical Services is on duty 24 hours/7 days a week and the whole year round. We will be pleased to assist you.

Representati ve Offi ces

Beijing – P.R. of ChinaMumbai - IndiaNew Delhi – IndiaSt. Petersburg – Russia

Head Offi ce IHC Technical Services

Kinderdijk, The Netherlands

Regional IHC Organizati ons worldwide

IHC Technical Services ChinaTianjin/Tanggu & Guangzhou, P.R. of ChinaIHC Technical Services EuropeHendrik-Ido-Ambacht, The NetherlandsIHC Technical Services IndiaMumbai, IndiaIHC Technical Services Middle EastDubai, United Arab EmiratesIHC Technical Services South East AsiaSingaporeIHC Technical Services West AfricaLagos, Nigeria

IHC Technical Services

P.O. Box 50, 2960 AB KinderdijkSmitweg 6, 2961 AW KinderdijkThe Netherlands

T +31 78 692 17 30F +31 78 691 09 61mineralprocessing.ts@ihcmerwede.comwww.ihcmerwede.com

IHC Technical Services is a registered trade name ofIHC Parts & Services B.V.

P1 voorzijde P2P7

IHC Technical ServicesMineral Processing

Mineral Processing

IHC Merwede applies dedicated expert knowledge, including broad practi cal experience, theoreti cal and practi cal research for the design and performance of its mineral dressing Jigs. Therefore Mineral Processing contributes with this product to a greatly improved jigging cycle.

IHC Technical Services: your performance is our challenge!

Proven Advantages

IHC Technical Services

The products of Mineral Processing have the following advantages for the customer:• proven excellent recovery of >98%• recovery of fi ne parti cles (50 microns)• large capaciti es with a relati vely small separati on plant• excellent match between excavati ng equipment and

separati on plant• environmental friendly operati on• proven reliable performance• low running cost• low hutch water requirement • low power consumpti on

“A system is more than the sum total of its parts” is so oft en proven in the alluvial mining world: a properly analysed separati on process, a balanced fl ow sheet and careful selecti on of components can make or break the effi ciency of the mining plant.IHC Merwede BV originates from a group of Dutch shipyards that joined forces over sixty years ago, with the main aim of servicing the alluvial mining industry. IHC Merwede off ers full services to the mining market:

• consultancy and engineering services• dredge mining• complete separati on plants• mineral processing equipment• deep-sea mining• life cycle support

Mechanical/hydraulic drive unit

4

5

6

7

89

1

2

3

IHC Life Cycle Support

P4

IHC Technical Services: your performance is our challenge!

Exploded View IHC Jig Standard Design Jig & Skid Frame Jig Unique Saw-tooth Movement High Recovery IHC Jig

What is a Jig?A Jig is a gravity separator, which sepa-rates minerals from slurry using pulsa-ting water displacement. Minerals are separated from slurry by a difference in specific weight.

The concentrate cone underneath the Jig bed moves up and down in a “saw tooth” motion, creating a fast upward stroke and a slow downward stroke. This causes a pulsating water flow from the cone through the Jig bed.

How it worksThe feed enters the Jig in the centre and flows in a radial manner over the

• gold• tin (cassiterite)• magnetite• lead• diamonds• mineral sands

In addition to alluvial mining, Mineral Processing is also involved in other mining applications:• hard rock mining• recovery of minerals as by-products

of sand and gravel winning• environmentally friendly separation

processes• tailing re-handling• deep-sea mining R&D

bed towards the tailing chute. The Jig bed usually consists of a layer of coar-se, heavy particles (ragging), which are placed on the Jig screen. The mixture of sand and mineral particles is fedas slurry on top of the ragging, also penetrating it. The ‘saw-tooth’ move-ment causes the heavy, coarse grains to pass rapidly over the bed, while the fine sand and lighter minerals take more time to penetrate through the ragging and screen. These are drawn off as concentrate. Mineral Processing supplies equipment that is used in the mining of:

Standard Design Jig SeriesThe SD Jig Series are Jig installations consisting of a combination of Standard modules. These installations are especi-ally designed for optimum performance in that environment. This ensures that customers always get an installation best suited to the application.

The SD Jig installation has a modu-lar construction, which makes it a dismountable processing plant and easier to transport. Depending on the required capacity, modules can be combined up to a maximum of twelve. For smaller capacities a mini, micro and super micro module are available.

The advantages of these SD and SF Jig Series are:• easy to transport• lightweight construction • flexibility in number and

arrangement• standard bed length• easy maintenance and repair, as

each module can be shut down individually

Skid Frame Jig SeriesThe SF Jig Series are Jigs that are mounted on Skid Frames, used in on-shore installations. These Jig instal-lations are standardised to various capacities, so customers can choose the installation most suited to their requirements.

Like the SD Jig installation, the SF Jig installation also has a modular con-struction. The SF Jig installation has the same range as the SD Jig instal-lation.

The Jig separation plants are available in various executions:• skid mounted, moveable plants• integrated into factory processing of

crushed rock• integrated into sand and gravel

separation plants• mounted aboard dredges • delivered as stand-alone plants on

pontoons, fed by dredges operating at a distance

IHC Merwede has undertaken theo-retical and practical research into the design and performance of the Jig. This has resulted in the development of a greatly improved jigging cycle.The Jig is a remarkable concentrator with the capability of handling large tonnages, thereby coping with widely fluctuating loads in terms of volume, as well as pulp density and grain size. It can take feeds more coarse than 25 mm and as fine as 0.05 mm, and still maintain an excellent recovery of 98%.

The Jig ‘saw-tooth’ pulsation pat-tern, developed by IHC Merwede, is superior to conventional patterns. It reduces the hutch water requirement and improves the recovery capability of fine, valuable minerals.The ‘saw-tooth’ movement consists of a fast upward and a slow downward stroke. In order to prevent loss of fine ore during the upward stroke, the aim is to produce a fierce upward stroke of short duration.

Each system has its own features; deciding which system to use depends on the number of modules used in the installation.The advantages of these systems are:• low power consumption• stroke and frequency adjustment• stroke pattern adjustment• installation and maintenance pos-

sible with normal mechanical skills and care

The downward stroke, also called the suction stroke, is much longer. During this phase, the fine particles are drawn into the bed.

IHC Merwede has developed two types of jig drives, which are able to facilitate the unique ‘saw-tooth’ move-ment. These are a mechanical drive and a mechanical-hydraulic drive. Both drives are designed to give reliable performance under the severe condi-tions that prevail on mineral dredgers and in mines.

Mobile Jig plantSkid Frame Jig Standard Design Jig

662 1753

4937 5598

30,55% 1,217

A

1000

1000

66 175

2468 2535

6,48% 1,067

B

595 1578

2468 3064

38,41% 1,341

C

0 0

3500 3500

0,00% 1,025

Jetwater

0 0

500 500

0,00% 1,025

Monitor

60 158

247 306

38,41% 1,341

E

536 1420

6222 6757

18,21% 1,154

F

602 1595

8690 9292

15,19% 1,130

B & F

602 1595

8690 9292

15,19% 1,130

H

0,00 0,00

1080 1080

0,00% 1,025

J 2

40 106

1174 1214

8.28% 1.054

B

360 954

1174 1534

38.57% 1.240

D

324 859

1557 1881

35.55% 1.284

F

0 0

400 400

0.00% 1.000

Jetwater

0 0

100 100

0.00% 1.000

Monitor

36 95

117 153

44.83% 1.387

E10%

550

10%

363 963

3177 3541

23.26% 1.169

K

364 965

2731 3095

26.10% 1.194

B & F

61 161

155 216

50.81% 1.463

L

0.00 0.00

216 216

0.00% 1.000

J

67.59 179.12

558 626

24.29% 1.178

L + R

0.00 0.00

600 600

0.00% 1.000

P

60 159

386 446

29.21% 1.222

N

7.51 19.90

172 180

10.34% 1.069

O

0.00 0.00

250 250

0.00% 1.000

Q

7.01 18.58

403 410

4.41% 1.028

R 0.50 1.33

19.50 20.00

6.37% 1.041

S

424 1124

3117 3541

26.50% 1.198

H + N

Flowsheet Inside cambox of M/H drive unit