CN112194153A

CN112194153A - Glauber's salt ore deposit leaches system of preparing liquid

Info

Publication number: CN112194153A
Application number: CN202011127405.3A
Authority: CN
Inventors: 乔素钦
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-01-08

Abstract

The invention discloses a mirabilite ore leaching and liquid preparing system, which comprises: a crushing pulping subsystem and a leaching pulping subsystem; the leaching liquid preparation subsystem comprises a leaching unit, a dilution washing unit and a baume degree adjusting unit; the leaching unit comprises at least two radial flow thickeners X, a three-way change-over valve A, a three-way change-over valve B, a three-way change-over valve C and a three-way change-over valve D; a slurry suction pump X is arranged in the radial flow thickener X; the radial flow thickener X is connected with the crushing and pulping subsystem through a three-way change-over valve A, and the radial flow thickener X is connected with a water supply system through a three-way change-over valve B; the radial flow thickener X is connected with the baume degree adjusting unit through a three-way change-over valve C; one end of a slurry suction pump X is connected with a sedimentation tank of a radial flow thickener X, and the other end of the slurry suction pump X is connected with a dilution washing unit through a three-way change-over valve D; a plurality of radial flow thickeners are arranged in parallel to perform alternate work, so that the traditional discontinuous operation mode is solved, continuous and uninterrupted operation can be performed, and the operation capacity is greatly improved.

Description

Glauber's salt ore deposit leaches system of preparing liquid

Technical Field

The invention belongs to the technical field of mine ore dressing and wet smelting, and particularly relates to a mirabilite ore leaching and liquor making system.

Background

Mirabilite is a sulfate mirabilite mineral, generally contains sodium sulfate hydrate, sodium oxide and magnesium sulfate, and is widely used in the fields of medicine, metallurgy, chemical industry, building and the like. The preparation of mirabilite generally comprises two process procedures of brine leaching, distillation dehydration and residue leaching management, wherein the quality and the production cost of the mirabilite are determined by brine preparation and purification, and the process is a core technology section; the prior domestic traditional mirabilite brine preparation process scheme is as follows:

1. heap leaching process:

1.1. open dump leaching: the heap leaching condition consists of a heap leaching site, a water collecting channel and a leaching pond, the soil foundation of the site needs to be subjected to anti-seepage treatment, and a mulching film is generally tamped or laid; spreading mirabilite ore layer by layer in a preset opposite approach, spraying and leaching by adopting clear water or dilute mirabilite type brine, leading the leaching solution to flow into a leaching solution pool through an ore layer gap and a catchment channel, and pumping into a distillation mirabilite preparation working section when the brine reaches a certain baume degree; when the ore leaching is finished, the leaching residue is subjected to clay sealing treatment in situ.

1.2. Leaching by using a pit: during mining design, a leaching chamber is designed underground, ores produced by blasting are loosely paved in the leaching chamber, clear water or dilute brine is added for soaking, and when the brine reaches a certain Baume degree, the brine is pumped to a distillation nitrate making working section; when the ore is leached, the leaching residue is used as a mining pit backfill material to exist.

2. The tank leaching process comprises the following steps: the tank immersion condition is composed of an immersion tank and an immersion pool. During leaching operation, the coarsely broken ore is filled into a leaching tank to a certain amount, then clear water or dilute brine is added for soaking, and when the leaching liquid reaches a certain Baume degree, the leaching liquid is pumped to a distillation leaching working section for preparing nitre; the leached slag is transported and piled up by a loader and an automobile;

3. the stirring and leaching process comprises the following steps: the stirring and soaking condition is composed of a powder making device, a stirring barrel and a soaking pool. During leaching operation, the ore is crushed to a certain granularity and then enters a leaching and stirring barrel, and clear water or dilute brine is added for stirring and leaching; when the leaching is finished, a bottom valve of the stirring barrel is opened, the leaching solution and the leaching residue are discharged into a leaching solution pool, solid-liquid separation is realized through precipitation, when the brine reaches a certain Baume degree, the brine is pumped to a distillation and marketing workshop section, and the leaching residue is transported and stockpiled by a loader and an automobile.

The above three traditional technical solutions of leaching processes all have some defects, i.e. some technical improvement space.

For example, the heap leaching process has the advantages of large treatment capacity, low leaching production cost, low leaching rate and large entrainment loss of leaching residues (liquid), and is a rough process; the tank leaching process comprises the following steps: the method has the advantages that the leaching rate is higher, and the defects are that the treatment capacity is small, the entrainment loss of leaching residues (liquid) is large, and the continuous operation cannot be carried out; the stirring and leaching process comprises the following steps: the advantages are high leaching yield, but the defects are low specific productivity, high production cost and incapability of continuous operation.

Therefore, how to realize continuous operation by reducing the leaching production cost, improving the leaching rate and reducing the slag-liquid entrainment loss becomes a technical problem to be solved urgently by current practitioners.

Disclosure of Invention

In view of the above, the present invention proposes a glauber's salt ore leaching system that overcomes or at least partially solves the above problems.

The invention provides a mirabilite ore leaching liquor making system, which comprises a crushing and pulping subsystem and a leaching liquor making subsystem;

wherein the leaching solution preparation subsystem comprises: the device comprises a leaching unit, a dilution washing unit and a baume degree adjusting unit;

the leaching unit includes: the device comprises a three-way change-over valve A, a three-way change-over valve B, a three-way change-over valve C, a three-way change-over valve D and at least two radial flow thickeners X; a slurry suction pump X is arranged in the radial flow thickener X;

the radial flow thickener X is connected with the crushing and pulping subsystem through the three-way change-over valve A, and the radial flow thickener X is connected with a water supply system through the three-way change-over valve B;

the radial flow thickener X is connected with the baume degree adjusting unit through the three-way change-over valve C;

one end of the slurry suction pump X is connected with the sedimentation tank of the radial flow thickener X, and the other end of the slurry suction pump X is connected with the dilution washing unit through the three-way change-over valve D.

In one embodiment, if the leaching unit comprises a number of the radial-flow thickeners X as a, a number of the radial-flow thickeners X are connected with the three-way switching valve a through a-2 three-way switching valves, and a number of the slurry suction pump X are connected with the three-way switching valve D and a number of the radial-flow thickeners X are connected with the three-way switching valve C through a-2 three-way switching valves; the radial flow thickener X is connected with the three-way change-over valve B through a-1 three-way change-over valves.

In one embodiment, the crushing and pulping subsystem comprises a crushing and screening unit and a material fine grinding unit;

the crushing and screening unit comprises: the system comprises a receiving bin, a vibration feeding machine, a primary hammer crusher, a first belt conveyor, a vibration screen, a second belt conveyor, a first circulating bin, a classifier, a slurry pool and a first slurry pump;

the discharge port of the receiving bin is positioned above the feed port of the vibration feeding machine, the discharge port of the vibration feeding machine is communicated with the feed port of the primary hammer crusher, the discharge port of the primary hammer crusher is connected with the initial end of the first belt conveyor, the tail end of the first belt conveyor is communicated with the feed port of the vibration screen, the discharge port of the vibration screen is communicated with the initial end of the second belt conveyor, the tail end of the second belt conveyor is connected with the feed port of the first circulating bin, and the pulp outlet of the vibration screen is connected with the pulp inlet of the pulp pond; the slurry outlet of the slurry pool is communicated with the slurry inlet of the first slurry pump, and the slurry outlet of the slurry pool is connected with the leaching liquid preparation subsystem.

In one embodiment, the material fine grinding unit comprises a first feeder, a two-stage hammer crusher, a third belt conveyor, a first feeder and a ball mill;

the discharge hole of the first transferring bin is positioned above the feeding hole of the first feeder, the discharge hole of the first feeder is communicated with the feeding hole of the second-stage hammer crusher, the discharge hole of the second-stage hammer crusher is connected with the initial end of a third belt conveyor, and the tail end of the third belt conveyor is communicated with the feeding hole of the second transferring bin; the discharge hole of the second turnover bin is positioned above the feed inlet of the second feeder, the discharge hole of the second feeder is communicated with the feed inlet of the ball mill, the slurry outlet of the ball mill is connected with the slurry inlet of the slurry pool, and the discharge hole of the ball mill is also connected with the grader to form a closed circuit ore grinding loop.

In one embodiment, the dilution wash unit comprises: the device comprises a three-way change-over valve E, a three-way change-over valve F, a three-way change-over valve G and at least two radial flow thickeners Y; a slurry suction pump Y is arranged in the radial flow thickener Y;

the radial flow thickeners Y are connected with a water supply system through the three-way change-over valve E and the three-way change-over valve B, and a first radial flow thickener Y in the radial flow thickeners Y is connected with the slurry suction pump X through the three-way change-over valve D; the slurry suction pump Y is respectively connected with the next radial flow thickener Y adjacent to the slurry suction pump Y; the slurry suction pump Y of the last radial-flow thickener Y is connected with the slurry tank;

the radial flow thickener Y is connected with the ball mill through the three-way change-over valve F and a three-way change-over valve G, and the three-way change-over valve G is also connected with the three-way change-over valve E; the three-way switching valve F is also connected with the baume degree adjusting unit.

In one embodiment, if the number of the radial-flow thickeners Y is b, the three-way switching valve G is connected with the three-way switching valve E through b-1 three-way switching valves; the B radial flow thickeners Y are respectively connected with B three-way conversion valves between the three-way conversion valve G and the three-way conversion valve B; the b radial-flow thickeners Y are connected with the three-way change-over valve F through b-1 three-way change-over valves.

In one embodiment, the baume degree adjustment unit comprises a three-way switching valve H, a three-way switching valve I, a three-way switching valve J, and at least two radial thickeners Z; a slurry suction pump Z is arranged in the radial flow thickener Z;

the three-way change-over valve C is connected with the radial flow thickener C through the three-way change-over valve H; one end of the slurry suction pump Z is connected with the radial flow thickener Y, and the other end of the slurry suction pump Z is connected with the radial flow thickener Z through the three-way change-over valve I; the radial flow thickener Z is connected with a distillation saltpeter making workshop through the three-way change-over valve J; the radial flow thickener Z is connected with the three-way change-over valve F.

In one embodiment, if the number of the radial thickeners Z is c, the three-way switching valve H is connected with the radial thickeners Z through c-2 three-way switching valves, the three-way switching valve I is connected with the radial thickeners Z through c-2 three-way switching valves, the radial thickeners Z are connected with the three-way switching valve J through c-2 three-way switching valves, and the radial thickeners Z are connected with the three-way switching valve F through c-1 three-way switching valves.

In one embodiment, the leaching liquefaction system further comprises a dewatering cake making subsystem;

the dehydration and cake making subsystem comprises a high-pressure slurry pump, a three-way change-over valve K, a three-way change-over valve L and at least two box-type filters;

the residue leaching inlet of the high-pressure slurry pump is connected with the slurry pool, and the residue leaching outlet of the high-pressure slurry pump is connected with the residue leaching inlet of the box type filter through the three-way change-over valve K; the dilute brine outlet of the box type filter is connected with the third radial flow thickener Y; and the leaching residue is discharged from a leaching residue outlet of the box type filter.

Or the dilute brine outlet of the box filter is also connected with the mirabilite mine underground cavity through the three-way change-over valve L.

In one embodiment, if the dewatering and cake making subsystem comprises d box-type filters, d box-type filters are connected with the three-way change-over valve K through d-2 three-way change-over valves or d-2 three-way change-over valves are connected between the box-type filters and the three-way change-over valve L.

The invention provides a mirabilite ore leaching and liquid making system, which has the following advantages:

(1) the leaching unit is provided with at least two radial-flow thickeners which are connected in parallel for alternate work, so that the traditional discontinuous operation mode is solved, continuous and uninterrupted operation can be realized, and the operation capacity is greatly improved.

(2) Mirabilite ore is stirred and leached for a long time in the whole process of the leaching and washing unit, the ore is added with fine leaching granularity, overflow brine of the washing unit in the leaching and liquid making working section returns to the crushing and pulping working section for ore grinding, dilute brine produced in the dehydrating and cake making working section returns to the leaching and liquid making working section for dilution and washing unit, and then returns to the crushing and pulping working section for ore grinding, so that the recovery rate of valuable components of the ore is improved, and the baume degree of the valuable components in the water for ore grinding is improved.

(3) Reducing the entrainment of residual liquid: the leaching residue is repeatedly washed in one stage or multiple stages, so that the entrainment loss of the residual pregnant solution in the leaching residue mud cake can be greatly reduced, and the recovery rate of valuable components can be greatly improved.

(4) The Baume degree of the brine is stable: the traditional brine has low baume degree and is extremely unstable, and the invention returns the brine with low baume degree to the crushing and pulping working section for ore grinding to form a closed-loop adjusting loop with raised baume degree; the baume degree adjusting unit can ensure the stability of baume degree and greatly reduce the production cost of a downstream distillation nitrate making working section.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1a is a connection structure diagram of a leaching unit provided by the invention;

FIG. 1b is a schematic view of the connection of the leaching unit provided by the present invention;

FIG. 2 is a connection structure of a leaching unit provided by the invention and comprising two radial-flow thickeners;

FIG. 3 is a connection structure of a leaching unit provided by the invention and comprising three radial-flow thickeners;

FIG. 4a is a diagram of a connection structure of a dilution washing unit according to the present invention;

FIG. 4b is a schematic diagram of the connection of a dilution wash unit provided by the present invention;

FIG. 5 is a schematic view of a dilution washing unit according to the present invention comprising two radial thickeners connected together;

FIG. 6 is a schematic view of a dilution washing unit according to the present invention comprising three radial thickeners connected together;

fig. 7 is a connection structure diagram of the baume degree adjusting unit provided by the present invention;

FIG. 8 is a connection structure diagram of a baume degree adjusting unit including two radial flow thickeners according to the present invention;

FIG. 9 is a connection structure diagram of a baume adjustment unit comprising three radial-flow thickeners according to the present invention;

FIG. 10a is a schematic view of a connection structure of a dewatering and cake-making subsystem according to the present invention;

FIG. 10b is a schematic diagram of the connection of the dewatering and cake-making subsystem provided by the present invention;

FIG. 11 is a connecting structure diagram of the dewatering cake-making subsystem provided by the present invention comprising two box-type filters;

FIG. 12 is a connecting structure diagram of the dewatering cake-making subsystem provided by the present invention comprising three box-type filters; fig. 13 is a schematic view of the overall structure of a mirabilite ore leaching system according to the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As shown in fig. 1a-1b, the present invention provides a glauber salt ore leaching system, comprising: a crushing pulping subsystem and a leaching pulping subsystem;

wherein, leach the liquification subsystem and include: the device comprises a leaching unit, a dilution washing unit and a baume degree adjusting unit;

the leaching unit comprises a three-way change-over valve A, a three-way change-over valve B, a three-way change-over valve C, a three-way change-over valve D and at least two radial flow thickeners X; a slurry suction pump X is arranged in the radial flow thickener X; the radial flow thickener X is connected with the crushing and pulping subsystem through a three-way change-over valve A, and the radial flow thickener X is connected with a water supply system through a three-way change-over valve B; the radial flow thickener X is connected with the baume degree adjusting unit through a three-way change-over valve C; one end of a slurry suction pump X is connected with a sedimentation tank of the radial flow thickener X, and the other end of the slurry suction pump X is connected with a dilution washing unit through a three-way change-over valve D.

Further, the leaching unit comprises a radial flow thickeners X, the number of the radial flow thickeners X is a, a radial flow thickeners X are connected with the three-way change-over valve A, a radial flow thickeners X are connected with the three-way change-over valve C through a-2 three-way change-over valves, the slurry suction pump X is connected with the three-way change-over valve D through a-2 three-way change-over valves, and a radial flow thickeners X are connected with the three-way change-over valve B through a-1 three-way change-over valves.

In this embodiment, the three-way switching valve B is used to control the amount of water in the leaching unit; the three-way change-over valve A is used for controlling the flow direction of ore pulp, an inlet is communicated with the slurry suction pump through a pipeline, and an outlet is respectively communicated with a slurry inlet of the radial flow thickener X through a pipeline and the three-way change-over valve;

the radial-flow thickeners X are alternately operated and used for plowing and stirring and dissolving the ore pulp for a long time under the normal temperature condition to produce mirabilite brine, and each radial-flow thickener comprises a sedimentation tank, an overflow tank, a central shaft, a driving arm, a driving mechanism, a suspension bracket, a slurry scraper, an ore pulp stirring pump, a relay annular receiving groove and a slurry transfer pump; the stirring pump is arranged between the inner scraper frame and the outer scraper frame, and is used for pumping slurry out of the water outlet of the stirring pump to be sprayed out, so that shaftless stirring is realized.

The three-way change-over valve C is used for connecting a pipeline channel of X overflow brine (precious liquid) of the radial flow thickener; one inlet of the three-way change-over valve C is communicated with an X overflow groove of the radial flow thickener through a pipeline, and the outlet is communicated with a downstream baume degree adjusting unit; if a plurality of radial flow thickeners need to be arranged, a three-way change-over valve needs to be added to realize the communication of the pipelines.

The three-way change-over valve D is used for alternately connecting an X slurry pipe channel of the slurry suction pump, an inlet is respectively communicated with an X water outlet of the slurry suction pump through a pipeline, and an outlet is communicated with the dilution washing unit through a pipeline;

the mud suction pump X is used for sucking and removing the immersed slag at the bottom of the X radial flow pool of the radial flow thickener and is arranged between the inner scraper frame and the outer scraper frame.

If the leaching unit comprises two radial flow thickeners X which are connected in parallel, wherein the two radial flow thickeners X are respectively X1 and X2, a three-way change-over valve is not required to be added between the three-way change-over valve C and the two radial flow thickeners X1 and X2, only the two radial flow thickeners X1 and X2 are respectively connected to two inlets of the three-way change-over valve C, and the outlet of the three-way change-over valve C is connected with the baume degree adjusting unit; the three-way change-over valve D and two radial-flow thickeners X1 and X2 do not need to be additionally provided with three-way change-over valves, only a slurry suction pump X1 and X2 are respectively connected with two inlets of the three-way change-over valve D, the outlet of the three-way change-over valve D is communicated with a dilution washing unit, the radial-flow thickeners X1 and X2 are respectively connected with two outlets of the three-way change-over valve A, the inlet of the three-way change-over valve A is communicated with a crushing and pulping subsystem, a three-way change-over valve B1 is required to be arranged between the radial-flow thickeners X1 and X2 and the three-way change-over valve B, the inlet of the three-way change-over valve B is connected with a three-way change-over valve B1, the two outlets of the three-way change-over B1 are respectively communicated

If three radial-flow thickeners X are connected in parallel, the three radial-flow thickeners X are respectively X1, X2 and X3, and the corresponding slurry suction pumps are X1, X2 and X3, wherein a three-way switching valve C1 is required to be arranged between the radial-flow thickeners X1, X2 and X3 and the three-way switching valve C, the radial-flow thickeners X1 and X2 are respectively connected with two inlets of the three-way switching valve C1, an outlet of the three-way switching valve C1 is connected with an inlet of the three-way switching valve C, the other inlet of the three-way switching valve C is connected with the radial-flow thickener X3, and an outlet of the three-way switching valve C is connected with the baume degree adjusting unit; three-way change-over valve D1 needs to be added between three-way change-over valve D and mud suction pump X1, X2 and X3, mud suction pump X2, X3 are connected with two inlets of three-way change-over valve D1 respectively, the outlet of three-way change-over valve D1 is connected with the inlet of three-way change-over valve D, another inlet of three-way change-over valve D is connected with mud suction pump X1, the outlet of three-way change-over valve D is communicated with dilution washing unit, a three-way change-over valve A1 needs to be arranged between radial flow thickener X1, X2 and X3 and three-way change-over valve A, the inlet of three-way change-over valve A is connected with the crushing and pulping subsystem, two outlets of three-way change-over valve A are connected with the inlet of three-way change-over valve A1 and radial flow thickener X1 respectively, two outlets of three-way change-over valve A1 are connected with radial flow thickeners X2 and X3 respectively, two outlets of radial flow thickener X1, X2 and X, two outlets of the three-way switching valve B1 are respectively connected with an inlet of the three-way switching valve B2 and an inlet of the radial flow thickener X1, and two outlets of the three-way switching valve B2 are respectively connected with the radial flow thickener X2 and X3, and the specific connection relation is shown in the figure;

in one embodiment, the crushing pulping subsystem comprises a crushing screening unit and a material fine grinding unit;

the discharge port of the receiving bin is positioned above the feed port of the vibration feeding machine, the discharge port of the vibration feeding machine is communicated with the feed port of a primary hammer crusher, the discharge port of the primary hammer crusher is connected with the initial end of a first belt conveyor, the tail end of the first belt conveyor is communicated with the feed port of a vibration screen, the discharge port of the vibration screen is communicated with the initial end of a second belt conveyor, the tail end of the second belt conveyor is connected with the feed port of a first circulation bin, and the pulp outlet of the vibration screen is connected with the pulp inlet of a pulp pond; the slurry outlet of the slurry pool is communicated with the slurry inlet of the first slurry pump, and the slurry outlet of the slurry pool is connected with the leaching solution making subsystem; wherein, dust removal stations are arranged between the receiving bin and the vibration feeding machine and between the belt conveyer and the vibration sieve.

In the embodiment, the receiving bin is used for storing ores and is made of reinforced concrete or steel; the vibration feeder is used for stably feeding ores in the receiving bin into the primary hammer crusher according to the operation requirement of the system; the primary hammer crusher is used for crushing ores to a set block size and is fixed on an equipment foundation through a pre-buried steel piece; the first belt conveyor is used for conveying the primary crushed material to the vibrating screen; the vibrating screen is used for controlling the granularity of the materials, and the screened coarse fraction (+3mm materials) are conveyed to the first circulating bin, and the minus 3mm materials are conveyed to the slurry pool; the second belt conveyor is used for conveying coarse fraction materials (+3mm materials) to the first turnover bin, and standard universal equipment is adopted; the pulp tank stores pulp generated by the vibrating screen and the material fine grinding unit, and is constructed and manufactured by adopting reinforced concrete or steel structures; the first slurry pump is used for pumping the slurry in the slurry tank to a downstream leaching unit and adopts standard general equipment; the first rotary bin stores crushed materials (coarse-grained materials), and is constructed and manufactured by adopting reinforced concrete or a steel structure; the dust removal station is used for collecting dust at a dust raising point, and dust damage is eliminated or reduced.

the discharge port of the first transferring bin is positioned above the feeding port of the first feeder, the discharge port of the first feeder is communicated with the feeding port of the second-stage hammer crusher, the discharge port of the second-stage hammer crusher is connected with the initial end of a third belt conveyor, and the tail end of the third belt conveyor is communicated with the feeding port of the second transferring bin; the discharge hole of the second turnover bin is positioned above the feed inlet of the second feeder, the discharge hole of the second feeder is communicated with the feed inlet of the ball mill, the slurry outlet of the ball mill is connected with the slurry inlet of the slurry pool, and the discharge hole of the ball mill is also connected with the grader to form a closed circuit grinding loop; wherein a dust removal station is arranged between the first rotary bin and the first feeder.

In this embodiment, the first feeder is used for stably feeding the material in the first turnover bin into the second-stage hammer crusher, and standard universal equipment is adopted; the third belt conveyor is used for conveying the crushed materials generated by the secondary hammer crusher into the second transferring bin; the second turnover bin is used for storing crushed materials generated by the secondary hammer crusher and is constructed and manufactured by adopting reinforced concrete or a steel structure; the second feeder is used for stably feeding the materials in the second turnover bin into the ball mill and adopts standard universal equipment; the ball mill is used for further finely grinding the crushed materials into pulp, and standard general equipment is adopted; the classifier is used for controlling the overflow granularity of ore pulp, and coarse fraction materials return to the ball mill for regrinding to form a closed circuit grinding loop with the ball mill;

4a-4b, in one embodiment, the dilution wash unit includes a three-way switching valve E, a three-way switching valve F, and a three-way switching valve G, and at least two radial thickener Y; a slurry suction pump Y is arranged in the radial flow thickener Y;

the radial flow thickeners Y are connected with a water supply system through a three-way change-over valve E and a three-way change-over valve B, and the first radial flow thickener Y in the radial flow thickeners Y is connected with the slurry suction pump X through a three-way change-over valve D; the slurry suction pump Y is respectively connected with the next adjacent radial flow thickener Y; a slurry suction pump Y of the last radial-flow thickener Y is connected with the slurry tank;

the radial flow thickener Y is connected with the ball mill through a three-way change-over valve F and a three-way change-over valve G, and the three-way change-over valve G is also connected with a three-way change-over valve E; the three-way change-over valve F is also connected with the Baume degree adjusting unit.

Furthermore, the number of the radial flow thickeners Y is b, and the three-way change-over valve G is connected with the three-way change-over valve E through b-1 three-way change-over valves; the B radial flow thickeners Y are respectively connected with B three-way conversion valves between the three-way conversion valve G and the three-way conversion valve B; the b radial-flow thickeners Y are connected with the three-way change-over valve F through b-1 three-way change-over valves.

The radial-flow thickener Y comprises at least one radial-flow thickener Y, a plurality of radial-flow thickeners Y and a plurality of radial-flow thickeners Y, wherein the radial-flow thickener Y comprises a sedimentation tank, an overflow groove, a central shaft, a driving arm and a driving mechanism, a suspension bracket and a slurry scraper, a slurry suction pump, a relay annular receiving groove and a slurry transfer pump, and the radial-flow thickeners Y are all used for diluting and washing leached residues from an upstream unit and reducing the entrainment loss of residual brine of dehydrated leached residues in a downstream working section;

in the embodiment, the three-way change-over valve E is used for controlling the water quantity of the washing unit, the inlet is communicated with a water supply system, and the outlet is communicated with a central shaft pulp inlet of a first radial-flow thickener Y in all the radial-flow thickeners Y which are connected in series;

the slurry suction pump Y is used for sucking and removing the immersed slag at the bottom of the radial flow pool of the radial flow thickener and is arranged between the inner scraper frame and the outer scraper frame, and the water outlet of the slurry suction pump Y is communicated with the central shaft slurry inlet of the radial flow thickener Y through a pipeline; and the water outlet of the slurry suction pump Y of the last radial-flow thickener Y in all the radial-flow thickeners Y connected in series is sent to the slurry tank through a pipeline.

The three-way change-over valve F is used for controlling the brine trend, two inlets are respectively connected with the radial flow thickener Y and the baume degree adjusting unit, and an outlet is communicated with an inlet of the three-way change-over valve G. The three-way conversion valve G is used for controlling the water consumption of the ball mill and simultaneously controlling the proportion of clear water and brine, and an inlet is respectively communicated with a water supply system and an outlet of the three-way conversion valve F;

as shown in fig. 5, if two radial-flow thickeners Y are connected in series, the two radial-flow thickeners Y are respectively Y1 and Y2, a three-way change-over valve E1 is arranged between the three-way change-over valve E and the three-way change-over valve G, the three-way change-over valve E1 is used for controlling the water amount of the dilution washing unit, and the three-way change-over valve E1 are divided into two radial-flow thickeners Y1 and Y2, the central shaft pulp inlets of which are communicated, so as to; the leaching slag generated by the first series radial flow thickener Y1 is transmitted into a second radial flow thickener Y2 through a slurry suction pump Y1, the leaching slag generated by the second radial flow thickener Y2 is transmitted into a slurry pool through a slurry suction pump Y2, a three-way switching valve F1 is additionally arranged between the radial flow thickeners Y1 and Y2 and a three-way switching valve F, the three-way switching valve F1 is used for alternately connecting a flow brine channel of the radial flow thickener, two inlets of the three-way switching valve F are respectively communicated with two overflow chutes of the radial flow thickeners Y1 and Y2, and an outlet of the three-way switching valve F is communicated with one inlet of the three-way switching valve F;

as shown in fig. 6, if three radial-flow thickeners Y are connected in series, and the three radial-flow thickeners Y are Y1, Y2 and Y3 respectively, a three-way change-over valve is required to be added to realize the connection, and the connection relationship of each component in the dilution washing unit is shown in the figure; two three-way switching valves E1 and E2 are arranged between the three-way switching valve E and the three-way switching valve G, and the three-way switching valves E, E1 and E2 are communicated with central shaft slurry inlets of three radial flow thickeners Y1, Y2 and Y3 to supply water; the leaching slag generated by the first series-connected radial-flow thickener Y1 is conveyed into the second radial-flow thickener Y2 through a slurry suction pump Y1, the leaching slag generated by the second radial-flow thickener Y2 is conveyed into the third radial-flow thickener Y3 through a slurry suction pump Y2, and the leaching slag generated by the third radial-flow thickener Y3 is conveyed into a slurry pond through a slurry suction pump Y3; two three-way switching valves F1 and F2 are additionally arranged between the radial flow thickeners Y1, Y2 and Y3 and the three-way switching valve F, wherein two inlets of the three-way switching valve F1 are respectively communicated with two overflow grooves of the radial flow thickeners Y1 and Y2, an outlet of the three-way switching valve F2 is connected with one inlet of the three-way switching valve F2, the other inlet of the three-way switching valve F2 is connected with the third radial flow thickener Y3, and an outlet of the three-way switching valve F2 is connected with the three-way switching valve F.

As shown in fig. 7, in one embodiment, the baume adjustment unit includes a three-way switching valve H, a three-way switching valve I, a three-way switching valve J, and at least two radial thickeners Z; a slurry suction pump Z is arranged in the radial flow thickener Z;

the three-way change-over valve C is connected with the radial flow thickener C through the three-way change-over valve H; one end of a slurry suction pump Z is connected with the last radial-flow thickener Y connected in series in the dilution washing unit, and the other end of the slurry suction pump Z is connected with the radial-flow thickener Z through a three-way change-over valve I; the radial flow thickener Z is connected with a distillation saltpeter making workshop through a three-way change-over valve J; the radial flow thickener Z is connected with a three-way change-over valve F.

Further, if the wave power adjusting unit comprises c radial flow thickeners Z, the three-way change-over valve H is connected with the radial flow thickeners Z through c-2 three-way change-over valves, the three-way change-over valve I is connected with the radial flow thickeners Z through c-2 three-way change-over valves, the radial flow thickeners Z are connected with the three-way change-over valve J through c-2 three-way change-over valves, and the radial flow thickeners Z are connected with the three-way change-over valve F through c-1 three-way change-over valves.

In the embodiment, two or more radial-flow thickeners are configured in parallel and operated alternately for storing and adjusting the baume degree of brine; the radial flow thickener consists of a sedimentation tank, an overflow tank, a central shaft, a driving arm, a driving mechanism, a suspension bracket, a slurry scraper, a relay annular receiving groove and a slurry transfer pump; the three-way change-over valve H is used for controlling the brine trend to realize alternative operation of the shunt thickener; the inlet is communicated with a three-way change-over valve C, and the outlet is communicated with a central shaft water inlet of the radial flow thickener; the slurry suction pump Z is used for sucking and removing the slurry at the bottom of the Z-shaped tank of the radial flow thickener; is arranged between the two scraper holders;

as shown in fig. 8, if two radial-flow thickeners Z are connected in parallel, the two radial-flow thickeners Z1 and Z2 respectively control the brine trend corresponding to the slurry suction pumps Z1 and Z2 and the three-way change-over valve H, so as to realize the alternate operation of the split-flow thickener Z; the inlet is communicated with a three-way switching valve group C of the leaching unit, and the two outlets are respectively communicated with central shaft water inlets of a radial flow thickener Z1 and a Z2; a three-way change-over valve F3 is arranged between the three-way change-over valve F and the radial flow thickener Z, the three-way change-over valve F is used for controlling the brine trend, the three-way change-over valve F3 is used for alternately communicating or closing an overflow brine channel of the radial flow thickener Z, two inlets of the three-way change-over valve F3 are communicated with two overflow grooves of the radial flow thickener Z1 and Z2, an outlet is connected with one inlet of the three-way change-over valve F, the other inlet of the three-way change-over valve F is connected with the radial flow thickener Y, and the outlet of the three-way change-; the three-way change-over valve I is used for alternately communicating or closing a slag-soaking slurry channel of the slurry suction pump Z, an inlet is communicated with water outlets of the slurry suction pumps Z1 and Z2, and an outlet is communicated with the last radial flow thickener Y; and the three-way change-over valve J is used for alternately connecting an overflow brine channel of a third radial flow thickener, two inlets are communicated with the radial flow thickeners Z1 and Z2 sedimentation tanks, and an outlet is communicated with a downstream working section (a saltpeter making workshop).

As shown in fig. 9, if three radial-flow thickeners Z are respectively Z1, Z2 and Z3 connected in parallel, a three-way change-over valve H1 is arranged between the three-way change-over valve H and the radial-flow thickener Z for alternately communicating or closing the overflow brine channels of the radial-flow thickeners Z1, Z2 and Z3, the outlet of the three-way change-over valve H1 is communicated with the radial-flow thickeners Z2 and Z3, the inlet is connected with the outlet of the three-way change-over valve H, the other outlet of the three-way change-over valve H is connected with the radial-flow thickener Z1, the inlet of the three-way change-over valve H is communicated with the outlet of the three-way change-over valve C of the leaching unit, two three-way change-over valves F3 and F4 are arranged between the three-way change-over valve F4 and the radial-flow thickener Z, the inlets of the radial-flow thickeners Z2 and Z3, the outlet of the three-way change-over valve F4 is connected with the inlet of the radial-flow thickener F3, the other inlet, the three-way switching valve I is used for alternately communicating or closing slag-soaking slurry channels of slurry suction pumps Z1, Z2 and Z3, a three-way switching valve I1 is arranged between the three-way switching valve I and the slurry suction pump Z, the inlet of the three-way switching valve I1 is communicated with the water outlets of the two slurry suction pumps Z1 and Z2, the outlet of the three-way switching valve I is communicated with the inlet of the three-way switching valve I, the other inlet of the three-way switching valve I is connected with the slurry suction pump Z3, and the outlet of the three-way switching valve I is communicated with the last; a three-way switching valve J1 is arranged between the three-way switching valve J and the radial flow thickeners Z1, Z2 and Z3, the inlet of the three-way switching valve J1 is connected with the two radial flow thickeners Z1 and Z2, the outlet of the three-way switching valve J is connected with the inlet of the three-way switching valve J, the other inlet of the three-way switching valve J is connected with the radial flow thickener Z3, the outlet of the three-way switching valve J is communicated with a saltpeter plant, a three-way switching valve H1 is arranged between the three-way switching valve H and the radial flow thickeners Z1, Z2 and Z3, the inlet of the three-way switching valve H is connected with the outlet of the three-way switching valve C, the outlet of the three-way switching valve H is connected with the inlet of the three-way switching valve H1 and the radial flow thickener Z1, and the.

As shown in fig. 10a-10b, in one embodiment, the leaching subsystem further comprises a dewatering and cake-making subsystem; the dehydration and cake making subsystem comprises a high-pressure slurry pump, a three-way change-over valve K, a three-way change-over valve L and at least two box-type filters;

the immersed slag inlet of the high-pressure mud pump is connected with the mud pit, and the immersed slag outlet of the high-pressure mud pump is connected with the immersed slag inlet of the box-type filter through a three-way change-over valve K; the dilute brine outlet of the box type filter is also connected with a third radial flow thickener Y; the leaching residue is discharged from a leaching residue outlet of the box type filter.

Or the dilute brine outlet of the box filter is connected with the mirabilite mine underground cavity through a three-way change-over valve L.

Further, if the dewatering and cake making subsystem comprises d box-type filters, the d box-type filters are connected with the three-way change-over valve K through d-2 three-way change-over valves or the box-type filters are connected with the three-way change-over valve L through d-2 three-way change-over valves.

In the embodiment, the high-pressure mud pump is used for building pressure for the slag soaking mud, and standard general equipment is adopted; the box type filter is used for removing the water content of the leaching residue slurry and producing the low-water-content leaching residue mud cake, and the box type filter adopts standard general equipment which is generally configured by more than two devices and is operated alternately. The three-way change-over valve K is used for controlling the trend of the filter-pressing dilute brine; the water tank of the box-type filter is communicated with a Y water inlet of a first radial flow thickener through a pipeline, and the produced dilute brine returns to an upstream section dilution washing unit or is conveyed to a mirabilite mine underground chamber for leaching through a three-way change-over valve L; if a plurality of box-type filters are included, a three-way change-over valve is needed to control the trend of the slag-soaking slurry, so that alternate operation of the box-type filters is realized, and standard universal equipment is adopted;

as shown in fig. 11, if two box-type filters are connected in parallel, the two box-type filters are respectively a box-type filter 1 and a box-type filter 2, two outlets of a three-way change-over valve K are respectively connected with the box-type filter 1 and the box-type filter 2, an inlet of the three-way change-over valve K is connected with a mud pool through a high-pressure mud pump, two inlets of a three-way change-over valve L are respectively connected with the box-type filter 1 and the box-type filter 2, and an outlet of the three-way change-over valve L is connected with a.

As shown in fig. 12, if three box-type filters are connected in parallel, the three box-type filters are connected in parallel and are respectively a box-type filter 1, a box-type filter 2 and a box-type filter 3, a three-way change-over valve K1 is arranged between the three-way change-over valve K and the box-type filter, two outlets of the three-way change-over valve K1 are connected with the box-type filter 2 and the box-type filter 3, an inlet of the three-way change-over valve K1 is connected with an outlet of the three-way change-over valve K, the other outlet of the three-way change-over valve K is connected with; and a three-way change-over valve L1 is arranged between the three-way change-over valve L and the box filter, two inlets of the three-way change-over valve L1 are respectively connected with the box filter 1 and the box filter 2, an outlet of the three-way change-over valve L1 is connected with an inlet of the three-way change-over valve L, the other inlet of the three-way change-over valve L is connected with the box filter 3, and an outlet of the three-way change-over valve L is connected with a glauber.

The first embodiment,

The invention is composed of a crushing pulping subsystem, a leaching liquid-making subsystem and a dewatering cake-making subsystem, wherein the leaching liquid-making subsystem comprises a leaching unit consisting of two or more radial-flow thickeners, a diluting and washing unit consisting of one or more radial-flow thickeners and a baume degree adjusting unit consisting of two or more radial-flow thickeners, in the embodiment, the leaching liquid-making subsystem is provided with two radial-flow thickeners which are connected in parallel, the diluting and washing unit is connected in series through the two radial-flow thickeners, the baume degree adjusting unit is provided with two radial-flow thickeners which are connected in parallel, the dewatering cake-making subsystem is provided with 3 high-pressure slurry pumps which are connected in parallel, and the whole structure of the dewatering cake-making subsystem is connected as shown in figure 13.

The crushing and pulping subsystem is used for crushing, screening and ball-milling mirabilite ores to a certain granularity, and pumping ore pulp formed by ore grinding to a downstream working section, and the specific working principle is as follows:

the method comprises the following steps of (I) crushing and pulping: as shown in fig. 1 b:

1. the system functions are as follows: crushing, screening and ball-milling mirabilite ores to a certain particle size, and pumping ore pulp formed by ore milling to a downstream working section.

2. The structure comprises the following components: the device comprises an ore bin 1, a vibration feeder 2, a hammer crusher 3, a belt conveyor 4, a vibration screen 5, a belt conveyor 6, an ore pulp pond 7, a slurry pump 8, a three-way conversion valve group 9, a turnover bin 10, a feeder 11, a dust removal station 12, a three-way conversion valve group 13, a hammer crusher 14, a belt conveyor 15, a three-way conversion valve group 16, a turnover bin 17, a three-way conversion valve group 18, a feeder 19, a ball mill 20, a classifier 21, a three-way conversion valve group 13 and an electrostatic cloth bag dust collector.

1) Raw ore bin 1: the steel is used for storing ores and is poured by reinforced concrete or constructed by steel.

2) The vibrating feeder 2: according to the operation requirement of the system, the ore in the ore bin 1 is stably fed into the hammer crusher 3.

3) Hammer crusher 3: and crushing the ore to a set block degree, adopting standard universal equipment, and fixing the ore on an equipment foundation through pre-buried steel pieces.

4) The belt conveyor 4: the primary crushed material is conveyed to a vibrating screen 5.

5) The vibrating screen 5: the material size is controlled, the oversize coarse fraction material is sent to the second grade for crushing, the +3mm material is sent to the downstream unit turnover bin, and the-3 mm material is sent to the downstream leaching section.

6) The belt conveyor 6: the crushed materials are sent to a downstream turnover bin 10, and standard general equipment is adopted.

7) Slurry tank 7: storing ore pulp from the vibrating screen 5 and the grader 21, and adopting reinforced concrete or steel structure construction and manufacturing.

8) Slurry pump 8: and pumping the ore pulp to a downstream working section by adopting standard universal equipment.

9) A turnaround bin 10: storing the crushed materials of the upstream units, and adopting reinforced concrete or steel structure to construct and manufacture.

10) The feeder 11: the materials in the turnover bin 10 are stably fed into the hammer crusher 14, and standard general equipment is adopted.

11) The dust removal station 12: the dust collecting and collecting unit is used for collecting dust at a dust raising point, and 3 groups of dust raising points are arranged to eliminate or reduce dust raising harm to the unit.

12) Hammer crusher 14: further crushing the crushed materials from the upstream unit by adopting standard universal equipment

13) The belt conveyor 15: the crushed material is sent into a turnover bin 17, and standard general equipment is adopted.

14) Turnover feed bin 17: storing the crushed materials of the upstream units, and adopting reinforced concrete or steel structure to construct and manufacture.

15) Feeder 19: the materials in the turnover bin 17 are stably fed into the ball mill 20, and standard general equipment is adopted.

16) Three-way switching valve group 18: used for controlling the ore grinding water quantity of the ball mill 20, and the inlet is communicated with a water supply system and a low-concentration water delivery pipe of a downstream working section.

17) The ball mill 20: and (4) further finely grinding the crushed materials to prepare pulp by adopting standard universal equipment.

18) The classifier 21: controlling the overflow granularity of the ore pulp, returning the coarse fraction material to the ball mill 20) for regrinding, and forming a closed circuit grinding loop with the ball mill.

A crushing and screening unit: the unit is started to operate, the vibration feeder 2 stably feeds ores in the receiving bin 1 into the first-level hammer crusher 3, crushed materials are conveyed to the vibration sieve 5 through the first belt conveyor 4 to be sieved and classified, the sieved coarse-grained materials are conveyed to the downstream first circulating bin 10 through the second belt conveyor 6, materials with the size of-3 mm are gathered into the classifier 21, and the overflowed ore pulp is conveyed to the ore pulp pool 7 and then conveyed to the downstream working section through the slag pulp pump 8.

3.2. Material fine grinding unit: the first feeder 11 stably feeds the crushed materials in the first turnover bin 10 into the second-stage hammer crusher 14, and a dust removal station 12 is arranged between the first feeder 11 and the first turnover bin 10 and used for collecting dust at a dust raising point and eliminating or reducing the harm of dust raising; the secondary crushed material is conveyed to a second transferring bin 17 through a third belt conveyor 15; the second feeder 19 feeds the material into the ball mill 20 stably, the material is finely ground under the hammering and grinding functions of the ball mill 20 and then enters the classifier 21, and the ore pulp meeting the particle size requirement overflows into the ore pulp pump pool 7 after hydraulic classification and is pumped to a downstream working section through the first slurry pump 8. The coarse fraction material settles to the bottom of the classifier 21 pool, and is returned to the ball mill 20 by the screw conveyor for regrinding to form a closed circuit grinding loop.

The leaching liquor preparation subsystem is used for further adding water to dilute and dissolve the mirabilite pulp from the upstream working section, and outputting pregnant liquor to the downstream working section; diluting the leaching residue with water, stirring and washing to reduce the Baume degree of brine and prevent the entrainment loss of the brine remained in mud cakes in the downstream working section; adjust and stably output high baume degree brine, reduce low reaches workshop section manufacturing cost, its concrete theory of operation is as follows:

3.1. a leaching unit: as shown in fig. 4 b:

1) opening a radial flow thickener 23 channel of a three-way change-over valve 33, closing a radial flow thickener 35 channel, enabling the ore pulp from a first slurry pump 8 to enter a radial flow pool of the radial flow thickener 23, wherein the radial flow thickener 23 consists of a sedimentation tank, an overflow tank, a central shaft, a driving arm, a driving mechanism, a suspension bracket, a slurry scraper, a slurry suction pump 24, an ore pulp stirring pump 26, a relay annular receiving groove and a slurry transfer pump; the ore pulp stirring pump 26 is arranged between the inner scraper frame and the outer scraper frame, and is used for pumping slurry out of a water outlet of the stirring pump to realize shaftless stirring; the radial-flow thickener 35 is composed of a sedimentation tank, an overflow tank, a central shaft, a driving arm, a driving mechanism, a suspension bracket, a slurry scraper, a relay annular receiving groove, a slurry transfer pump, a slurry suction pump 36 and an ore pulp stirring pump 37.

2) And opening the radial flow thickener 23 channel of the three-way change-over valve 9 and the three-way change-over valve 22, closing the radial flow thickener 35 channel, and allowing clear water from a water supply system to enter the radial flow tank of the radial flow thickener 23 to dilute and dissolve the ore pulp to produce mirabilite brine.

3) Starting a driving arm and a driving mechanism of the radial flow thickener 23 to rotate around a central shaft, and continuously plowing the slag precipitated at the bottom of the radial flow tank by a scraper positioned at the bottom of the radial flow tank to dilute the dissolved brine in the leaching slag; and meanwhile, the ore pulp stirring pump 26 is started to repeatedly suck and raise the ores at the bottom of the radial flow tank, so that the dissolved brine is diluted, the dissolution of the mirabilite ores is accelerated, and the solubility of the ores is improved.

4) When the liquid level of the radial flow pool of the radial flow thickener 23 is close to the height of the overflow plate, the pulp channels of the radial flow thickener 23 of the three-way change-over valve 33 and the three-way change-over valve 22 are closed, the injection of the pulp and clear water is stopped, and the radial flow thickener 23 enters a stirring leaching state at the moment; meanwhile, the three-way change-over valve 33 and the three-way change-over valve 22 are switched to open the passages of the ore pulp and the clear water of the radial flow thickener 35, the ore pulp and the clear water enter the radial flow tank of the radial flow thickener 35, and the radial flow thickener 35 enters the states of filling, diluting, stirring and leaching.

5) When the water solution of the ore sodium sulfate (NaSO4) in the radial-flow thickener 23 reaches a certain degree, the ore pulp stirring pump 26 is closed, and the stirring operation is stopped; at the same time, the slurry channel of the three-way change-over valve 34 is opened, the slurry suction pump 24 is started, and the immersed slag at the bottom of the radial flow thickener 23 is sucked and discharged into the downstream washing unit.

6) When the liquid level of the radial flow pool of the radial flow thickener 35 is close to the height of the overflow plate, the radial flow thickener 35 of the three-way change-over valve 33 is closed, the pulp channel of the flow thickener 23 is opened, the pulp from the slurry pump 8 and the clear water from the three-way change-over valve 22 are injected into the radial flow thickener 23 pool, and the brine is pushed to overflow over the overflow plate and enter the downstream wave power adjusting unit through the three-way change-over valve 25.

7) As mentioned above, the radial-flow thickener 23 and the radial-flow thickener 35 alternate to achieve sufficient dissolution of sodium sulfate (NaSO4) component in mirabilite ore, and mirabilite brine is produced.

3.2 dilution wash unit:

the immersed slag and clean water from the three-way change-over valve 34 and the three-way change-over valve 13 enter a radial flow tank 38 of a radial flow thickener for filling; when the liquid level is higher than the height of an overflow plate of the radial flow thickener, dilute brine is communicated with a water supply system through a three-way change-over valve 27, a three-way change-over valve 28 and a three-way change-over valve 18;

simultaneously, a driving arm and a driving mechanism of the radial flow thickener 38 are started to rotate around a central shaft, a scraper plate positioned at the bottom of the radial flow tank continuously plows slag deposited at the bottom of the sedimentation tank, the immersed slag is further diluted and washed, brine is produced by dissolution, and the brine concentration is reduced; the second slurry suction pump 39 is turned on and the sludge at the bottom of the settling tank is sucked into the radial thickener 40.

The slag from the radial flow thickener 38 and the clean water from the three-way change-over valve 16 enter a radial flow pool of the radial flow thickener 40 for filling; when the liquid level is higher than the height of an overflow plate of the radial flow thickener, dilute brine is communicated with a water supply system through a three-way change-over valve 27, a three-way change-over valve 28 and a three-way change-over valve 18; simultaneously, a driving arm and a driving mechanism of the radial flow thickener 40 are started to rotate around a central shaft, a scraper plate positioned at the bottom of the radial flow tank continuously plows slag deposited at the bottom of the radial flow tank, and the immersed slag is further washed to produce brine for diluting so as to reduce the brine concentration; the third sludge suction pump 41 is started and the radial pond bottom sludge is sucked into the sludge pond 47.

The washing radial flow thickener is configured by one or more series connection, leaching residues are washed and leached to further improve the ore leaching rate, the brine baume degree is reduced by dilution, and the purpose of reducing the entrainment loss of the leaching residue mud cake residues in the downstream working section is achieved.

3.3. Baume degree adjusting means:

1) and (3) alternately opening a brine channel of the three-way change-over valve 29, closing a brine channel of the radial flow thickener 43 of the three-way change-over valve 29, feeding brine from the leaching unit into the radial flow thickener 30 for filling, stopping filling when the brine level of the radial flow thickener is close to the height of the overflow plate, and simultaneously feeding brine into the radial flow thickener 43 for filling.

2) When the Baume degree of the brine reaches the preset Baume degree range, the brine conveying channel of the three-way conversion valve 45 is opened, and the brine is conveyed to a distillation saltpeter making workshop.

3) When the baume degree of the brine of the radial flow thickener 30 is lower than the preset baume degree range, the three-way change-over valve 31, the three-way change-over valve 28 and the three-way change-over valve 18 are opened, the brine overflowing from the radial flow thickener 30 returns to the ball mill 20 for grinding, a closed baume degree adjusting loop is formed, and the stability of the baume degree of the brine is ensured.

4) When the brine reaches a preset baume value, closing a radial flow thickener 30 brine channel of the three-way conversion valve, opening a radial flow thickener 43 brine channel, enabling the brine from the leaching unit to enter the radial flow thickener 43, and enabling the brine of the radial flow thickener 30 to enter a storage state or a conveying state to a downstream distillation saltpeter-making section.

5) When qualified brine of the radial-flow thickener 30 is emptied or the brine of the radial-flow thickener 43 reaches a preset baume degree, a brine channel of the radial-flow thickener 30 of the three-way change-over valve 29 is opened, and brine from the leaching unit enters the radial-flow pool of the radial-flow thickener 30 to be filled, so that the operation is performed in a reciprocating and alternating manner.

6) When the micro-suspension leaching residues in the brine of the radial-flow thickener 30 and the radial-flow thickener 43 are deposited at the bottom of the radial-flow pool to a certain amount, the slurry suction pump 32, the slurry suction pump 44 and the three-way change-over valve 42 are alternately started, and the leaching residue slurry is pumped back to the radial-flow thickener 40.

The dewatering and cake-making subsystem is used for removing and reducing the water content of the leached residue, and reducing the entrainment loss of the residual liquid as low as possible, and the specific working principle is as follows:

the high-pressure slurry pump 48 is started, the slurry pond 47 is used for soaking the slag and the slurry is pressurized, is conveyed into the box-type filter 50 through the three-way change-over valve 49 and is conveyed to the box-type filter 52 and the box-type filter 53 through the three-way change-over valve 51, dilute brine produced under the action of pressure and a filter medium is returned to the radial flow thickener 38 or is conveyed to a mirabilite underground cavern through the three-way change-over valve 46, and low-content cement cakes are produced and are converted, utilized or selectively stockpiled.

2) Two or more box filters 50 are arranged in parallel and operated alternately.

1) the system operation efficiency: the technical scheme solves the problem of traditional discontinuous operation mode, can continuously and uninterruptedly operate, and greatly improves the operation capacity.

2) Ore leaching efficiency: the mirabilite ore is stirred and leached for a long time in the whole process of the leaching and washing unit, and the leaching granularity of the ore is fine, so compared with the traditional technical scheme, the leaching of valuable components in the ore is greatly improved.

3) Reducing the entrainment of residual liquid: the technology prevents the leaching residue from being repeatedly washed in one or more stages, can greatly reduce the entrainment loss of the residual pregnant solution in the leaching residue mud cake, and greatly improves the recovery rate of valuable components.

4) The Baume degree of the brine is stable: the baume degree of the traditional brine is low and extremely unstable, and the baume degree adjusting unit in the technical scheme can ensure the stability of the baume degree and greatly reduce the production cost of a downstream distillation nitrate preparation working section.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The utility model provides a glauber's salt ore leaching system of preparing liquid which characterized in that includes: a crushing pulping subsystem and a leaching pulping subsystem;

2. The glauber's salt leaching liquid preparation system of claim 1, wherein if the leaching unit comprises a number of the radial thickener X, a number of the radial thickener X are connected with the three-way change-over valve a through a-2 three-way change-over valves, and a number of the radial thickener X are connected with the three-way change-over valve C through a-2 three-way change-over valves; the radial flow thickener X is connected with the three-way change-over valve B through a-1 three-way change-over valves.

3. The mirabilite ore leaching system according to claim 1, wherein the crushing and pulping subsystem includes a crushing and screening unit and a material fine grinding unit;

4. The mirabilite ore leaching system according to claim 1, wherein the material fine grinding unit comprises a first feeder, a two-stage hammer crusher, a third belt conveyor, a first feeder and a ball mill;

5. The glauber salt ore leaching system of claim 4, wherein the dilution washing unit comprises: the device comprises a three-way change-over valve E, a three-way change-over valve F, a three-way change-over valve G and at least two radial flow thickeners Y; a slurry suction pump Y is arranged in the radial flow thickener Y;

the radial flow thickeners Y are connected with a water supply system through the three-way change-over valve E and the three-way change-over valve B, and a first radial flow thickener Y in the radial flow thickeners Y is connected with the slurry suction pump X through the three-way change-over valve D; the slurry suction pump Y is respectively connected with the next adjacent radial flow thickener Y; the slurry suction pump Y of the last radial-flow thickener Y is connected with the slurry tank;

6. The glauber's salt leaching and solution-making system of claim 4, wherein if the number of the radial thickener Y is b, the three-way change-over valve G is connected with the three-way change-over valve E through b-1 three-way change-over valves; the B radial flow thickeners Y are respectively connected with B three-way conversion valves between the three-way conversion valve G and the three-way conversion valve B; the b radial-flow thickeners Y are connected with the three-way change-over valve F through b-1 three-way change-over valves.

7. The glauber's salt leaching liquid-making system of claim 5, wherein the baume adjustment unit comprises a three-way change-over valve H, a three-way change-over valve I, a three-way change-over valve J and at least two radial thickening machines Z; a slurry suction pump Z is arranged in the radial flow thickener Z;

8. The glauber's salt leaching liquid-making system of claim 7, wherein if the number of the pumping concentration adjustment unit comprises a pumping thickener Z is c, the three-way switching valve H is connected with the pumping thickener Z through c-2 three-way switching valves, the three-way switching valve I is connected with the pumping thickener Z through c-2 three-way switching valves, the pumping thickener Z is connected with the three-way switching valve J through c-2 three-way switching valves, and the pumping thickener Z is connected with the three-way switching valve F through c-1 three-way switching valves.

9. The mirabilite mine leaching system of claim 5, wherein the leaching system further includes a dewatering and cake making subsystem;

the residue leaching inlet of the high-pressure slurry pump is connected with the slurry pool, and the residue leaching outlet of the high-pressure slurry pump is connected with the residue leaching inlet of the box type filter through the three-way change-over valve K; the dilute brine outlet of the box type filter is also connected with the third radial flow thickener Y; and the leaching residue is discharged from a leaching residue outlet of the box type filter.

10. The mirabilite mine leaching and liquid making system according to claim 8, wherein if the cake dehydrating subsystem includes d box filters, d box filters are connected with the three-way change-over valve K through d-2 three-way change-over valves or d-2 three-way change-over valves are connected between the box filters and the three-way change-over valve L.