CGT-8振動式砂金精選機是國內有關砂金精選機的基礎上設計的。經多年采生產實踐，該精選機具有機械參數良好、操作簡單、砂金回收率高等優(yōu)點。

一、  用途及精選原理

每處理    1m³精砂，只需30分鐘左右，且回收率可達98%，如此進行二次處理，回收率可達99.8%，粒徑在    0.02毫米的微粒金可全部回收。

該機還可以上人工小溜,每小時可處理    3m³，處理精砂可得到滿意的經濟效益。

砂金、砂礫和水三種物質的比重差異明顯，砂金比重為16左右，砂礫為2.6，水為1。該精選機是根據它們比重不同，采用震動浮原理，在震動作用下，砂礫在槽內進行往復跳動，相互碰撞，加水在槽內產生渦流作用，使砂礫產生半懸浮狀態(tài)，結果砂礫向槽下運動，逐漸流出槽外，而砂金富集在槽內，這樣就把砂金和砂礫截然分開。

二、  結構說明

以輕型鋼軌為滑輪基礎平面，配有4個支承輪滑動，支承輪托支溜槽，槽內底面鋪有塑料毛氈，并有聯鎖溜槽壓緊，溜槽頭部安有擺線針輪減速機帶動凸輪，推動倒向桿，由壓縮彈簧回，形成震動。

三、  主要技術參數

四、安裝及使用

1、根據現場實際情況，確定安裝位置，一般在選礦溜槽附近，或設在清水位置。

2、將精選機安裝位置墊平壓實，然后將精選機穩(wěn)好，縱向坡度調到10.5°—12°，橫向要求水平。

3、將精選機底部用砂礫壓好，防止精選機跳動。

4、調整好噴水管，應直接噴射上料槽內，開動機器工作。

5、不斷把精砂上到精選機上料槽內，由于水的沖擊，精砂自動流入精選機槽內，大約30分鐘即可上完。

6、待料上完后，用水沖擊和震動1—2分鐘，再清理。

7、清溜，砂金基本在上料槽內和精選機前部、中部，尾部基本無金。

8、清溜時，為減少淘洗量，可用網眼8×    8毫米的鐵絲編織的篩子過一下，除掉較大礫石，再進行入工淘洗。在過篩時，要特別注意檢查有無塊金存在。

9、當細粒金較多時，可進行二次精選，以便保證回收率。

10、溜格通水孔若被礫石堵塞，要及時處理掉,以保暢通。

11、精選機不使用時，不得放任何物品，以保障使用期限。

12、請注意：水量大時角度可小點；水量小時角度可大點，使其毛氈保持不露為宜。

CGT-8 Vibrating Placer Gold Separator is a CGLC60A  Model and CGLC    40A Model  combined placer gold processing chute or can be operated along with other  equipment. It is designed based upon the relevant placer gold separators in    China,  with years of production practices showing good mechanical performance, simple  operation, high recovery of placer gold and other advantages.

I. Use and separation  philosophy

Placer gold is subject to primary separation by  CGLC60A Model and CGLC    40A  Model combined placer gold separation chute or other chutes with    0.7m³ of concentrate obtained. It  requires more treatment prior to obtaining higher graded concentrate. This  process used to be handled manually through chute, followed by hand washing,  which took 3-4 hours with high labor intensity and low recovery rate of placer  gold, especially, in the case of more fine grains of gold and platelet gold,  much lower in the recovery. However, CGT-8 Vibrating Placer Gold Separator has  solved the above-mentioned problem with handling of    1m³ of concentrate requiring only about 30  minutes and the recovery rate of 98% reached. In the event that secondary  treatment takes place, the recovery rate is expected to reach 99.8% and the  particles at a size of    0.02 mm  can be fully recovered.

This machine also can be used for handling manually  through chute at a capacity of    3m³/h  with treatment of concentrate producing the desirable economic benefit.

The  three substances of placer gold, gravel and water have an evident difference in  specific gravity with the specific gravity for placer gold being around 16, gravel  2.6 and water 1. The separator introduces the principle of floating by  vibration based on their different specific gravities. The gravels, under the  action of vibration, will jump back and forth and collide each other in the  chute. With the addition of water in the chute, eddy current will be produced,  allowing the gravels to be kept in the state of the semi-suspension. If the  gravels move down the chute and gradually flow out of the chute, and the place  gold concentrates in the chute, the place gold will be separated completely  from the gravels.

II. Explanations of structure

With light steel rail as a pulley foundation plan and  provision of 4 balancing wheels to slide and support the chute; the chute  bottom covered with plastic felts and the interlocked chute for compression;  the front of the chute fitted with cycloidal reducer to drive cam and to push  backward bar; return of compressed spring developing vibration.

III. Main  technical data

 1.Specification of chute: length of  groove：    2500  mm

a)   Upper width：    350 mm，lower width:    480 mm，in opening type，groove height：    150  mm.

b)  Vibration frequency：163 times/min.

c)   Stroke:：35~    40 mm，adjustable.

d)  Power: 1.5 kw.

e)  Slope of chute: 10.5°~12°.

f)   Weight：    380 kg.

g)  Auxiliary equipment：

（1）、2 submersible pump  0.7 kw.

（2）、water supply quantity:    15m³/h.

（3）、2 suction pipe（some）.

（4）、plastic felt    0.8 m².

IV. Installation and Operation

1. The  installation location is determined in accordance with the actual conditions on  site , generally to be located near beneficiation chute or in the place of  clean water. 

2、The location of separator installation  will be leveled up and compacted before the separator being steadied with  longitudinal grade adjusted to be 10.5⁰~12⁰ and lateral  to be level.

3、The bottom of separator will be pressed  properly with gravel to prevent it from jumping.

4、Water  spray pipe is adjusted properly to directly spray into feeding tank prior to  starting up the machine.

5、Concentrates will be fed into feeding tank of the separator with  small- size shovel continuously. Due to the impact of water, the concentrates  will flow automatically into the tank of the separator, which will take 30  minutes or so to complete.

6、After completion of feeding, washing  with water and vibrating 1~2 min before cleaning up.

7、In cleaning chute, placer gold primarily  is located in feeding tank and there is no placer gold in the front, middle and  rear of the separator.

8、In cleaning chute, to reduce washing  operation, placer gold may be screened with iron wire knitted    8 mm×    8 mm to remove big  gravel before being washed manually. In screening operation, attention should  be paid to checking presence of lump of gold.

9、If there is more granular gold,  secondary cleaning may be conducted to ensure the recovery rate.

10、If lattices of chute are blocked by  gravel, timely treatment should be made to ensure its smoothness.

11、When the separator is not used, no goods  are allowed to be placed in it and no person is allowed to sit in groove to  ensure its lifetime.

12、Note: when water supply quantity is  large, slope can be adjusted to be small and when water supply quantity is  small, slope can be adjusted to be big to keep the felt unexposed.