CN1177011A

CN1177011A - Vertical solid-liquid counter-current extraction column

Info

Publication number: CN1177011A
Application number: CN96119634A
Authority: CN
Inventors: 宋乐山; 孟凡昌
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-09-16
Filing date: 1996-09-16
Publication date: 1998-03-25

Abstract

A vertical type solid liquid counter flow extraction column includes feed funnel, extraction section, discharge valve, inlet and outelet of extract liquid, washing section, washing liquid inlet, and slag outlet. In the extraction column by the gravitational force, solid material moves from top to bottom, the extraction liquid moves by counter flow from bottom inlet to top outlet. This extraction column is simple in structure, low in cost, high in efficiency and suitable for large and small scale extraction.

Description

Vertical solid-liquid counter-current extraction column

The invention belongs to hydrometallurgy and chemical industry leaching equipment, specifically is a kind of vertical solid-liquid counter-current extraction column that utilizes the gravity settling deslagging.

In hydrometallurgy and Chemical Manufacture, to the processing of ore and other solid materials, often adopt the leaching technology, the effective ingredient in ore or the solid materials is extracted in the solution, further processing treatment in liquid.Leaching mode commonly used at present has following several: 1, leaching pond leaching, solid material such as ore are dropped in the pond, and add a certain amount of leaching agent and leach.Its main drawback is that leaching cycle length, discharging intensity are big, and leaching rate is low.2, the leaching drill traverse is got, in horizontal elongated slot, solid materials is under the effect of machinery (as spiral propeller etc.), by elongated slot and leaching agent effect, finally discharge at slag notch successively, this method can realize continuous production and solid-liquid counter-current extraction, its main drawback is the device structure complexity, investment is high, maintenance difficult, and power consumption is big, and solid materials flows inconvenient.3, dump leaching method is a kind of method of a large amount of extremely low-grade copper mines of leaching, and treatment capacity is big but the leaching cycle is long, and floor space is big, and leaching agent is required sternly to be not suitable for poisonous, corrodibility leaching agent, and leaching rate is low, so range of application is restricted.4, wet ball-milling leaching adds leaching agent when ball milling, pulverize and leach and carry out simultaneously, and shortcoming is that treatment capacity is little, and leaching rate is low, and is inapplicable to low grade ore, and facility investment is big, complicated operation.5, leaching is filtered, and leaching is carried out on a false bottom vacuum filter, as the turning over disk vacuum filter, can realize the continuous countercurrent leaching, automatic sludge discharge, and leaching rate height, but equipment complexity, investment is big, process cost height, maintenance difficult.

In sum, also there is not a kind of less investment that has simultaneously at present, time saving and energy saving, low-consumption high-efficiency, high leaching rate, the leaching technology that is not subjected to leaching agent character and not limited by the industrial scale size.

The objective of the invention is to design a kind of new leaching device, vertical solid-liquid counter-current extraction column.This extraction column can satisfy simultaneously high-level efficiency, low cost, universality, easy care, pollution-free, easy accessibility, simple to operate, leaching rate is high, is applicable to many indexs such as big small-scale.

The technical scheme that realizes above-mentioned purpose is: a kind of vertical solid-liquid counter-current extraction column, comprise feeding-in solid body funnel 1, extraction column leaching section 3, baiting valve 7, leaching liquid advances,

outlet

4,2, washing section 9, washings import 10 and slag-drip opening 14, loading hopper 1 is contained in the top of leaching section 3, the funnel bottom is stretched in the post, leaching liquid outlet 2 is located on the discharge port plane of the top loading hopper 1 that leaches section 3, baiting valve 7 is contained in leaching section bottom, on the washing section 9, leaching liquid import 4 and washings import 10 are located at leaching section 3 respectively, on the solid relief outlet of the bottom of washing section 9, slag-drip opening 14 is located at the washing section bottom.For leaching liquid and washings are evenly distributed in post, prevent bias current, level is being hinged with leaching liquid liquid distributor 6 and washings liquid distributor 12 in leaching liquid import and washings ingress post.Tipping speed governing check valve group 5 and pressure pump 8 before the leaching liquid inlet pipe are hinged with speed governing check valve group 11 or also are hinged with pressure pump 13 before the washings inlet pipe.

This extraction column selects for use stainless steel or carbon steel to make according to manufacturing technique requirent, perhaps lining resin, rubber.

Baiting valve is selected gate valve or flashboard type guiding valve for use, and

liquid distributor

6 and 12 is " one " font or " ten " font, " zero " shape, " " shape, and the bottom of this pipe is or/and the side has uniform fluid hole 15.

This vertical solid-liquid counter-current extraction column utilizes the gravity of solid material that the solid material is moved down from the top of extraction column, baiting valve and washing section slag-drip opening valve by control leaching section bottom make its natural deslagging, and control bed drain purge and deslagging cycle, leaching agent feeds from the bottom fluid inlet of post, flow out from the top of post, realize continuous countercurrent leaching with solid material, design has washing section below the leaching agent import, feed washings by fluid inlet with suitable flow velocity at the slag-drip opening place, the leaching agent that adheres on the slag is washed, making it enter the leaching section merges with leaching agent, by controlling feeding intake of solid material, the flow velocity of the speed of slagging tap and leaching agent, effective ingredient during leaching is expected admittedly more up hill and dale, and the waste residue of discharging only adheres to a spot of leaching agent.

The present invention and other leaching technology relatively have following advantage:

1, device structure is simple, and reduced investment is easy to make, dismantles and installs, and the maintenance operation expense is low.

2, both be applicable to scale operation,, can have realized continuous production and automated operation also applicable to small-scale production.

3, counter-current extraction, to effective ingredient leaching rate height in the solid material, and effective component content is high and stable in the leach liquor, helps the operation of subsequent technique.

4, wide adaptability applicable to the leaching that high and low grade is expected admittedly, when selecting the extraction column of different linings or material for use, applicable to multiple leaching agent, comprises poisonous, corrodibility leaching agent.

5, can realize recycling of leaching agent, improve the utilization ratio of leaching agent, reduce pollution environment.

6, the present invention can build up vertical type, also can build up tilting according to mine or operation site physical features, with handled easily or alleviate solid materials to device pressure, and increases the length of effective extraction column and increases leaching agent and the duration of contact of solid materials.

The structure of vertical solid-liquid counter-current extraction column of the present invention such as accompanying drawing.

Fig. 1 is the configuration diagram of this vertical solid-liquid counter-current extraction column.

Fig. 2 is four kinds of configuration diagram of

liquid distributor

6,12 in this vertical solid-liquid counter-current extraction column, and a is " one " font liquid distributor, and b is " ten " font liquid distributor, and c is " O " shape liquid distributor, and d is " " shape liquid distributor.

Below in conjunction with accompanying drawing the present invention is further described.

Shown in Figure 1, vertical solid-liquid counter-current extraction column of the present invention mainly comprises the leaching section 3 of loading hopper 1, extraction column, leaching liquid into and out of

Mouth

4,2, the baiting valve 7 of leaching section bottom, the washing section 9 of extraction column and a slag-drip opening 14 that washs liquid import 10 and washing section bottom, Described loading hopper is at the top of extraction column, and the funnel bottom is stretched in the extraction column, and leaching liquid import 4 is at the leaching pars infrasegmentalis, and outlet 2 is in the leaching section On the funnel 1 discharging opening plane on top, washing section 9 bottoms at baiting valve 7. Gu it is from the top down mobile that material enters extraction column by loading hopper With the leaching liquid counter current contacting leaching that enters from the leaching pars infrasegmentalis, the solid slag after the leaching is put into washing section 9 through bottom discharge valve 7. At leaching liquid Non-return combined valve 5, pressure pump 8 are housed before the feed tube, the control leaching agent flow velocity and pressure, in extraction column washing section 9, from leaching Section 3 residues that get off by the water washing of coming in from lower inlet 10, are washed the leaching agent that adheres on the solid material, at water inlet 10 at this section Before be equipped with check valve group 11, flow velocity and the pressure of control washing water perhaps install pressure pump 13 additional, give the pressurization of washing water, can will soak Get agent and be controlled at the leaching section. 14 times dress rows of slag-drip opening slag valve 16 is with control slag discharge capacity and row's slag speed and row's slag cycle. Contain behind the solid-liquid leaching Gone out by liquid outlet 2 by the leachate of extract, enter equably extraction column in order to make leaching liquid and washing liquid, at leaching liquid import 4 and washing liquid In import 10 place's posts

liquid distributor

6 and 12 have been installed, this liquid distributor shape such as aforementioned " one " font or " ten " font, " O " shape, " " shape, in the bottom of this pipe or/and the side has fluid hole 15.

The operation program of this extraction column is as follows: Gu material enters leaching section 3 by funnel 1, move down under the gravity effect, leaching agent is by pressing Power pump 8 pressurization and valve sets 5 are regulated and are entered extraction column by feed tube 4 behind the flow velocitys and be evenly distributed by liquid distributor 6, enter leaching section 3 and expect with solid The contact leaching, the leaching liquid that contains immersed material is flowed out by liquid outlet 2 to be collected, and the residue that is leached enters washing section 9 by baiting valve 7, washes Wash with running water or through 13 pressurizations of pressure pump, valve sets 11 adjustings enter the washing section evenly distributedly by water inlet pipe 10 and water distributor 12, Residue is washed, residue is carried the leaching agent that gets off and be washed in washing section 9, leaching agent is washed water and brings leaching section and leaching section into Leaching liquid mixes, and residue is closed baiting valve 7 after cleaning, and the row of opening slag valve 16 arranges slag, and row's slag end shut off valve 16 is opened then Baiting valve 7 enters next cycle operation. Charging rate, feed liquor concentration, speed, each bed drain purge and row's slag cycle etc. are according to tools such as production scales The body condition is determined.

Embodiment: the leaching technology with the copper oxide ore hydrometallurgy is an example.Raw ore (as higher-grade or the low grade ore without enrichment) is ground into breeze, determines input speed, each bed drain purge and deslagging cycle, calculate leaching H according to the difference of industrial scale, grade ₂SO ₄Concentration and feed liquor speed.Adopt equipment shown in Figure 1, breeze enters leaching section 3 by funnel 1, the H of selected concentration and temperature ₂SO ₄Enter extraction column with pressure pump 8 by liquid-inlet pipe 4 and liquid distributor 6, flow velocity is regulated by valve combination 5.H ₂SO ₄Upwards flow under pressure, breeze moves down under action of gravity, counter current contact in post, breeze in the process of moving down contained CuO gradually by H ₂SO ₄Leach and formation CuSO ₄Solution.Along with breeze moves down, copper content is more and more lower in the breeze, is finally all leached, and enters washing section 9, and before each deslagging, water flushing residue is to reduce the H that residue carries ₂SO ₄, with H ₂SO ₄Close baiting valve 7 after being flushed to the leaching section, open valve 16 deslagginves, valve-off 16 and washing water behind the deslagging are opened baiting valve 7 and are entered next circulation.The fresh H that enters by liquid-inlet pipe 4 ₂SO ₄Through fully exchange leaching, CuSO ₄Content raises gradually, is finally flowed out by liquid outlet 2, carries out CuSO ₄Condensing crystal or electrolytic copper production, remaining H ₂SO ₄Can be recycled.

Vertical solid-liquid counter-current extraction column of the present invention is equally applicable to carry gold with NaCN from the gold mine raw ore, and is carried leaching technology of chromic salt etc. by chromite, needs metallurgy, the chemical process of solid-liquid leaching.

Claims

1, a kind of vertical solid-liquid counter-current extraction column, it is characterized in that comprising feeding-in solid body funnel (1), leaching section (3), baiting valve (7), leaching liquid advances, outlet (4), (2), washing section (9), washings import (10) and slag-drip opening (14), loading hopper (1) is contained in leaching section (3) top, the funnel bottom is stretched in the post, leaching liquid outlet (2) is located at leaching section (3) top, on funnel discharge port plane, baiting valve (7) is installed in leaching section (3) bottom, on the washing section (9), slag-drip opening (14) is located at washing section (9) bottom, leaching liquid import (4) is in leaching section (3) bottom, on blow-off valve (7), washings import (10) is on the solid relief outlet of washing section (9) bottom.

2, extraction column as claimed in claim 1 is characterized in that locating in described leaching liquid import (4) and washings import (10) that level is being hinged with leaching liquid liquid distributor (6), washings liquid distributor (12) in the post.

3, extraction column as claimed in claim 2, it is characterized in that described leaching liquid liquid distributor (6), washings liquid distributor (12) are " one " font or " ten " font or " O " shape, " " shape, the bottom of this pipe is or/and the side has uniform fluid hole (15).

4, extraction column as claimed in claim 1 is characterized in that described baiting valve (7) selects gate valve or flashboard type guiding valve for use.

5, extraction column as claimed in claim 1 is characterized in that described leaching liquid import (4) preceding tipping speed governing check valve group (5).

6, extraction column as claimed in claim 5 is characterized in that at the preceding preceding tipping pressure pump of valving (5) (8) of described leaching liquid import (4).

7, extraction column as claimed in claim 1 is characterized in that in described washings import (10) preceding tipping speed governing check valve group (11).

8, extraction column as claimed in claim 7 is characterized in that at the preceding preceding tipping pressure pump of valving (11) (13) of described washings import (10).