A circulating heap leaching equipment for low-grade nickel ore

Abstract

The low-grade nickel ore circulating heap leaching equipment provided in this invention includes: atmospheric pressure heap leaching pool, a number of acid pools corresponding one-to-one with the atmospheric pressure heap leaching pool, and an acid circulation structure. The discharge outlet of the atmospheric pressure heap leaching pool is connected to the acid pool, and the acid circulation structure is connected to the atmospheric pressure heap leaching pool and the acid pool. It is used to detect the nickel content in the acid pool and guide the liquid from a certain acid pool to a certain atmospheric pressure heap leaching pool based on the detection results. In this way, the circulating drip irrigation of acid solution can be realized to realize circulating leaching of nickel ore, so that the nickel in the acid solution can be gradually enriched, and the leaching of nickel can be realized without increasing the amount of acid solution, effectively reducing the treatment cost of low-grade nickel ore.

Description

[0001] Description

[0002] A CIRCULATING HEAP LEACHING EQUIPMENT FOR LOW-GRADE NICKEL ORE

[0003] FIELD OF THE DISCLOSURE

[0004] The application relates to the technical field of high pressure reaction vessel of laterite nickel ore , in particular to a circulating heap leaching equipment of low grade nickel ore .

[0005] BACKGROUND

[0006] With the vigorous development of the new energy automobile industry and the gradual exhaustion of the high-grade nickel and cobalt resources , the industry ' s demand for Ni , Co and Mn metals in the new energy ternary materials is increasing day by day, and the development of laterite nickel ore with large reserves but low nickel grade has gradually become a hot spot in the industry . At present , in the laterite nickel ore hydrometallurgy field, the raw ore is usually washed first , and the slurry generated by the washing is sent to the thickener for thickening . When its concentration reaches a certain value , it is then sent to the high pressure reactor to mix with sul furic acid and steam for high pressure leaching, so as to extract nickel and cobalt in laterite nickel ore .

[0007] The above treatment methods are generally aimed at high grade or conventional grade nickel ore , while low grade nickel ore generally refers to the ore with nickel content less than 1 . 0 . Using the above conventional high temperature autoclave acid leaching, it will consume a lot of acid and high temperature steam, and the cost is too high .

[0008] SUMMARY

[0009] The purpose of this application is to overcome the above technical deficiencies and propose a low grade nickel ore circulating heap leaching equipment to solve the technical problem of high processing cost of low grade nickel ore in the existing technology .

[0010] In order to achieve the above technical purposes , the application adopts the following technical solutions :

[0011] This application provides a low grade nickel ore circulating heap leaching equipment , including :

[0012] Slurry temporary storage tank for temporary storage of slurry to be heap leaching;

[0013] A plurality of atmospheric pressure heap leaching pools are connected with the discharge port pipe of the slurry temporary storage tank;

[0014] A number of acid pools corresponding to the atmospheric pressure heap leaching pool are connected with the discharge port of the atmospheric pressure heap leaching pool ; and

[0015] An acid circulation structure , connected to the atmospheric pressure heap leaching pools and the acid pools , used for detecting the nickel content in the acid pools and guiding the liquid from the acid pools to the corresponding atmospheric pressure heap leaching pools based on the detection results .

[0016] Further, the outlet of the slurry temporary storage tank is connected with the slurry main pipe , and the slurry main pipe extends to form a number of slurry pipes , which are respectively connected with the atmospheric pressure heap leaching pool one by one .

[0017] Further, the atmospheric pressure heap leaching pool is a box with no cover at the upper end, and the atmospheric pressure heap leaching pool forms a heap leaching space connected with the external space , and the bottom of the atmospheric pressure heap leaching pool is inclined, forming a higher side of the bottom and the lower side of the bottom . The bottom of the lower side of the atmospheric pressure heap leaching pool is provided with a drainage port , the drainage port and the acid pool connected; A feed port is arranged on the higher side of the bottom surface of the atmospheric pressure pile leaching pool , and the feed port is connected with the slurry temporary storage tank pipeline .

[0018] Further, the acid pool is a box with an upper end without cover, and the initial acid is stored in the acid pool . The acid pool is connected with the drainage port , and the acid pool is provided with a liquid refill port for supplementing the acid . Further, the acid circulating structure includes a liquid inlet pipe , a circulating pump, a liquid outlet pipe , a number of nickel content detection modules and control modules . One end of the liquid inlet pipe is connected with the liquid inlet port of the circulating pump, and the other end is subdivided to form a number of liquid inlet branch pipes . The liquid inlet branch pipes are connected with each of the acid pool . The control module is electrically connected with the nickel content detection module and the circulating pump . The nickel content detection module is used to detect the nickel content . The control module controls the circulating pump according to the detection results .

[0019] Further, the liquid inlet branch pipe is provided with an electromagnetic liquid inlet valve , one end of the liquid outlet pipe is connected with the liquid outlet of the circulating pump, and the other end is subdivided to form a plurality of liquid outlet branch pipes , which extend to the upper part of each atmospheric pressure pile dip pool for introducing the liquid in the acid pool into the atmospheric pressure pile dip pool .

[0020] Further, the liquid outlet branch pipe is provided with an electromagnetic liquid outlet valve .

[0021] Further, several nickel content detection modules are fixed on the inner wall of the liquid inlet branch pipe for detecting the nickel content of the liquid in the liquid inlet branch pipe .

[0022] Further, the control module is electrically connected with the electromagnetic liquid inlet valve , the electromagnetic liquid outlet valve , the circulating pump and the nickel content detection module , and the control module obtains the detection data of all the nickel content detection module . And control the opening and closing of each electromagnetic liquid inlet valve and the electromagnetic liquid outlet valve according to the detection data .

[0023] Further, the liquid outlet branch pipe is serpentine arranged above the atmospheric pressure heap leaching pool , and the bottom of the liquid outlet branch pipe is provided with a number of drip holes , and the drip holes make the liquid drop drop by drop into the atmospheric pressure heap leaching pool .

[0024] Compared to the existing technology, the low-grade nickel ore circulating heap leaching equipment provided in this invention includes : atmospheric pressure heap leaching pool , a number of acid pools corresponding one-to-one with the atmospheric pressure heap leaching pool , and an acid circulation structure . The discharge outlet of the atmospheric pressure heap leaching pool is connected to the acid pool , and the acid circulation structure is connected to the atmospheric pressure heap leaching pool and the acid pool . It is used to detect the nickel content in the acid pool and guide the liquid from a certain acid pool to a certain atmospheric pressure heap leaching pool based on the detection results . In this way, the circulating drip irrigation of acid solution can be reali zed to reali ze circulating leaching of nickel ore , so that the nickel in the acid solution can be gradually enriched, and the leaching of nickel can be reali zed without increasing the amount of acid solution, ef fectively reducing the treatment cost of low-quality nickel ore .

[0025] The above description is only an overview of the technical scheme of this application . In order to better understand the technical means of this application and implement it in accordance with the contents of the speci fication, a better example of this application and the attached drawings are explained in detail as follows . The speci fic embodiments of this application are given in detail by the following embodiments and the attached drawings .

[0026] BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the schematic diagram of the module of the low- grade nickel ore circulating heap leaching equipment provided in this application;

[0028] Figure 2 is the structure diagram of the atmospheric pressure heap leaching pool in Figure 1 ;

[0029] The attached picture shows : 1 - atmospheric pressure pile leaching pool , 2- acid pool , 3- acid circulation structure , 31- liquid inlet pipe , 311 - electromagnetic liquid inlet valve , 32- circulation pump, 33- liquid outlet pipe , 331- liquid outlet branch pipe , 332- electromagnetic liquid outlet valve , 34- nickel content detection module . DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0030] In order to make the purpose, technical scheme and advantages of this application more clearly, the application is further explained in detail by combining the attached drawings and embodiments. It is understood that the specific embodiments described herein are intended only to explain this Application and are not intended to qualify it.

[0031] This application also provides a low-grade nickel ore circulating heap leaching equipment, see Figure 1-2, including slurry temporary storage tank (figure not shown) , a number of atmospheric pressure heap leaching pool ( '1' ) , a number of atmospheric pressure heap leaching pool ( '1' ) corresponding to one by one acid pool ( '2' ) and acid circulation structure ( '3' ) , the slurry temporary storage tank for temporary storage of slurry to be heap leaching material. The discharge port of the slurry temporary storage tank is connected with all the pipelines of the atmospheric pressure heap leaching pool ( '1' ) , the atmospheric pressure heap leaching pool ( '1' ) discharge port is connected with the acid pool ( '1' ) , the acid circulation structure ( '3' ) is connected with the atmospheric pressure heap leaching pool ( '1' ) and the acid pool ( '2' ) , It is used to detect the nickel content in the acid pool ( '2' ) and according to the test results, the liquid in the acid pool ( '2' ) is led to the atmospheric pressure heap leaching pool.

[0032] The low grade nickel ore circulating heap leaching equipment provided in this application includes: Atmospheric pressure heap leaching pool ( '1' ) , a number of and the atmospheric pressure heap leaching pool ( '1' ) one corresponding to the acid pool ( '2' ) and acid circulation structure ( '3' ) , the atmospheric pressure heap leaching pool ( '1' ) drain port and the acid pool ( '2' ) is connected, the acid circulation structure ( '3' ) is connected to the atmospheric pressure heap leaching pool ( '1' ) and the acid pool ( '2' ) , It is used to detect the nickel content in the acid pool ( '2' ) and according to the test results, the liquid in the acid pool ( '2' ) is led to the atmospheric pressure pile leaching pool, so as to realize the cyclic drip irrigation of the acid solution, and realize the cyclic leaching of the nickel ore, so that the nickel in the acid solution is gradually enriched, and the nickel leaching is realized without increasing the amount of acid solution, and the processing cost of low grade nickel ore is effectively reduced .

[0033] Further, the slurry outlet of the slurry temporary storage tank is connected with the slurry main pipe, the slurry main pipe extension to form a number of slurry pipe, respectively, and the atmospheric pressure heap leaching pool ( '1' ) one by one corresponding connection, the slurry temporary storage tank is used to temporarily store the slurry formed by the gravity separation, and can be uniformly led to each of the atmospheric pressure heap leaching pool ( '1' ) .

[0034] Further, the atmospheric pressure heap leaching pool ( '1' ) is an upper covered box, the atmospheric pressure heap leaching pool ( '1' ) forming a heap leaching space connected with the outside space, the atmospheric pressure heap leaching pool ( '1' ) bottom surface is inclined, forming a higher side of the bottom and the bottom of the lower side, the atmospheric pressure heap leaching pool ( '1' ) on the bottom of the lower side is provided with a row of liquid drain port, the liquid drain port and the acid pool ( '2' ) connected; A feed port is arranged on the higher side of the bottom surface of the atmospheric pressure heap leaching pool ( '1' ) , and the feed port is connected with the slurry temporary storage tank pipeline. When used, the slurry temporary storage tank leads the heap leaching ore material to the atmospheric pressure heap leaching pool 1, the heap leaching liquid generated by the heap leaching along the bottom of the atmospheric pressure heap leaching pool ( '1' ) to the drain port flow, and through the drain port discharge to the acid pool ( '2' ) .

[0035] Further, the acid pool ( '2' ) is an upper uncapped box, which stores the initial acid. The acid pool ( '2' ) is connected with the liquid drain port, and the acid pool ( '2' ) is provided with a liquid replenishment port for supplement acid.

[0036] Further, the acid liquid circulation structure ( '3' ) includes a liquid inlet pipe liquid inlet pipe ( '31' ) , a circulating pump ( '32' ) , an liquid outlet pipe ( '33' ) , a number of nickel content detection modules ( '34' ) , and control module. One end of the liquid inlet pipe ( ' 31 ’ ) is connected with the liquid inlet port of the circulating pump ( ' 32 ' ) , and the other end is is subdivided to form a number of liquid inlet branch pipes , each of which is connected to each acid liquid pool ( ' 2 ' ) . The liquid inlet branch pipe ( ' 31 ’ ) is provided with an electromagnetic liquid inlet valve ( ' 311 ’ ) , one end of the liquid outlet pipe ( ' 33 ' ) is connected with the liquid outlet port of the circulating pump ( ' 32 ’ ) , and the other end is subdivided to form a plurality of liquid outlet pipe ( ' 331 ’ ) , the liquid outlet pipe ( ' 331 ’ ) extends to each of the atmospheric pressure pile leaching pool ( ' 1 ' ) above , for the atmospheric pressure heap leaching pool ( ' 1 ' ) into the liquid in the acid pool ( ' 2 ' ) , The liquid outlet pipe ( ' 331 ’ ) is provided with the electromagnetic liquid outlet valve ( ' 332 ’ ) , a plurality of the nickel content detection module ( ' 434 ’ ) fixed on the inner wall of the liquid inlet branch pipe , used to detect the nickel content of the liquid in the liquid inlet branch pipe , the control module and the electromagnetic liquid inlet valve ( ' 311 ’ ) , the electromagnetic liquid outlet valve ( ' 332 ’ ) , the circulating pump ( ' 32 ' ) and the nickel content detection module ( ' 34 ’ ) electrical connection . The control module obtains the detection data of all the nickel content detection modules ( ' 34 ' ) , and controls the opening and closing of each electromagnetic liquid inlet valve ( ' 311 ’ ) and the electromagnetic liquid outlet valve ( ' 332 ’ ) according to the detection data .

[0037] It should be noted that the control module is a conventional controller on the market . Therefore , it will not repeat the detailed structure and circuit connection relationship .

[0038] It should be noted that the nickel content detection module ( ' 34 ’ ) is an online nickel water quality analyzer, which measures the nickel content in the water body based on spectrophotometry .

[0039] In order to understand the function of the control module , the working logic of the control module is described here :

[0040] Firstly, the detected nickel content value is obtained from each nickel content detection module ( ' 434 ’ ) . Then, the leaching solution of each atmospheric pressure heap leaching pool was ranked from high to low according to the nickel content concentration, forming the first leaching solution, the second leaching solution, . . . , the n-th leaching solution, and the corresponding first atmospheric pressure heap leaching pool , second atmospheric pressure heap leaching pool, the n-th atmospheric pressure heap leaching pool;

[0041] Then, by driving the circulation pump ( ' 32 ’ ) work, the electromagnetic liquid inlet valve ( ' 311 ’ ) , the electromagnetic liquid outlet valve ( ' 332 ’ ) open and close, the atmospheric pressure pile leaching pool of the n-th leaching liquid into the (n-l)-th atmospheric pressure pile leaching pool (n>l) , the first leaching liquid with the highest nickel content concentration is imported into the n-th atmospheric pressure pile leaching pool. And that completes the cycle of the leachate.

[0042] Further, the liquid outlet branch ( ' 311 ’ ) is arranged in a snake shape above the atmospheric pressure heap leaching pool ( '1' ) , and the bottom of the liquid outlet branch ( ' 311 ’ ) is provided with a plurality of liquid dropping holes, and the liquid dropping holes make the liquid fall into the atmospheric pressure heap leaching pool ( '1' ) in a drop by drop manner.

[0043] In order to better understand this application, the technical scheme of this application is explained in detail in combination with the attached drawings:

[0044] Firstly, the raw ore is sent to the cylinder ore washing machine for ore washing, and the raw ore is divided into a mixture of larger particles and smaller particles and ore slurry. The trough ore washing machine divides the mixture of smaller particles and ore slurry into smaller particles and ore slurry, and the ore slurry is filtered through the hydrocyclone and spiral chute in turn to screen out heavier chromite and lighter heap leaching ore. The heap leaching ore material is sent to the low-grade nickel ore recycling heap leaching equipment for heap leaching.

[0045] Heap leaching, the slurry uniformly inverted all the atmospheric pressure heap leaching pool ( '1' ) , the acid cycle structure ( '3' ) of the acid pool ( '2' ) in the acid extraction, drop to a certain atmospheric pressure heap leaching pool ( '1' ) , and the slurry reaction, so that the nickel in the slurry leaching, and flow to the acid pool ( '2' ) , such a cycle, to achieve nickel content in the acid gradually enriched, to achieve low-cost extraction of nickel.

[0046] Beneficial effects of this application: The circulating heap leaching equipment for low-grade nickel ore provided in this application includes : Atmospheric pressure heap leaching pool , a plurality of and the atmospheric pressure heap leaching pool one corresponding to the acid pool and the acid circulation structure , the atmospheric pressure heap leaching pool drainage port and the acid pool is connected, the acid circulation structure is connected to the atmospheric pressure heap leaching pool and the acid pool , It is used to detect the nickel content in the acid pool and according to the test results , the liquid in the acid pool is led to the atmospheric pressure heap leaching pool , so as to reali ze the cyclic drip irrigation of the acid solution, and reali ze the cyclic leaching of the nickel ore , so that the nickel in the acid solution is gradually enriched, and the nickel leaching is reali zed without increasing the amount of acid solution, and the processing cost of low grade nickel ore is ef fectively reduced . The above speci fic mode of implementation of this application shall not limit the scope of protection of this application . Any other corresponding changes and deformations made according to the technical ideas of the application shall be included in the scope of protection of the claims of the Application .

Claims

WHAT IS CLAIMED IS1 . A circulating heap leaching equipment for low-grade nickel ore , characteri zed in that it concludes :A slurry storage tank for temporarily storing the s lurry to be heap- leached;A number of atmospheric pressure heap leaching pool s , connected to the discharge outlet of the slurry storage tank via pipelines ;A number of acid pools corresponding one-to-one with the atmospheric pressure heap leaching pools , connected to the discharge outlets of the atmospheric pressure heap leaching pools ; andAn acid circulation structure , connected to the atmospheric pressure heap leaching pools and the acid pools , used for detecting the nickel content in the acid pools and guiding the liquid from the acid pools to the corresponding atmospheric pressure heap leaching pools based on the detection results .2 . According to claim 1 , the low-grade nickel ore circulating heap leaching equipment is characteri zed in that the outlet of the slurry temporary storage tank is connected with the slurry main pipe , and the slurry main pipe extends to form a number of slurry pipes , which are respectively connected with the atmospheric pressure heap leaching pool one by one .3 . According to claim 1 , the low-grade nickel ore circulating heap leaching equipment is characteri zed in that the atmospheric pressure heap leaching pool is a box with no cover at the upper end, and the atmospheric pressure heap leaching pool forms a heap leaching space connected with the external space , and the bottom of the atmospheric pressure heap leaching pool is inclined, forming a higher side of the bottom and the lower side of the bottom . The bottom of the lower side of the atmospheric pressure heap leaching pool is provided with a drainage port , the drainage port and the acid pool connected; A feed port is arranged on the higher side of the bottom surface of the atmospheric pressure pile leaching pool , and the feed port is connected with the slurry temporary storage tank pipeline .4 . According to claim 3 , the low-grade nickel ore circulating heap leaching equipment is characteri zed in that the acid pool is a box with an upper end without cover, and the initial acid is stored in the acid pool . The acid pool is connected with the drainage port , and the acid pool is provided with a liquid refill port for supplementing the acid .5 . According to Claim 4 , the low-grade nickel ore circulating heap leaching equipment is characteri zed in that the acid circulating structure includes a liquid inlet pipe , a circulating pump, a liquid outlet pipe , a number of nickel content detection modules and control modules . One end of the liquid inlet pipe is connected with the liquid inlet port of the circulating pump, and the other end is subdivided to form a number of liquid inlet branch pipes . The liquid inlet branch pipes are connected with each of the acid pool . The control module is electrically connected with the nickel content detection module and the circulating pump . The nickel content detection module is used to detect the nickel content . The control module controls the circulating pump according to the detection results .6 . According to claim 5 , the low-grade nickel ore circulating heap leaching equipment is characteri zed in that the liquid inlet branch pipe is provided with an electromagnetic liquid inlet valve , one end of the liquid outlet pipe is connected with the liquid outlet of the circulating pump, and the other end is subdivided to form a plurality of liquid outlet branch pipes , which extend to the upper part of each atmospheric pressure pile dip pool for introducing the liquid in the acid pool into the atmospheric pressure pile dip pool .7 . According to claim 6 , the low-grade nickel ore circulating heap leaching equipment is characteri zed in that the liquid outlet branch pipe is provided with an electromagnetic liquid outlet valve .8 . According to claim 7 , the low-grade nickel ore circulating heap leaching equipment is characteri zed in that several nickel content detection modules are fixed on the inner wall of the liquid inletbranch pipe for detecting the nickel content of the liquid in the liquid inlet branch pipe .9 . According to Claim 7 , the low-grade nickel ore circulating pile leaching equipment is characteri zed in that the control module is electrically connected with the electromagnetic liquid inlet valve , the electromagnetic liquid outlet valve , the circulating pump and the nickel content detection module , and the control module obtains the detection data of all the nickel content detection module . And control the opening and closing of each electromagnetic liquid inlet valve and the electromagnetic liquid outlet valve according to the detection data .10 . According to claim 6 , the low-grade nickel ore circulating heap leaching equipment is characteri zed in that the liquid outlet branch pipe is serpentine arranged above the atmospheric pressure heap leaching pool , and the bottom of the liquid outlet branch pipe is provided with a number of drip holes , and the drip holes make the liquid drop drop by drop into the atmospheric pressure heap leaching pool .

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