CN100390065C

CN100390065C - Method for separating calcium sulfate for carnallite floatation

Info

Publication number: CN100390065C
Application number: CNB2005100798845A
Authority: CN
Inventors: 魏学民
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-01
Filing date: 2005-07-01
Publication date: 2008-05-28
Anticipated expiration: 2025-07-01
Also published as: CN1891631A

Abstract

This invention relates to a method for separating CaSO4 from the flotation of carnallites, which replaces ore slurry foam tanks of rough selection, sweeping, first and second refining processes of original flotation set to the invented K-Ca separation tank and the lavation solution sprayed from sprayers or tubes set on the separation tank forms condensed small water columns to pass through all foamed ore slurries quickly, the lighter CaSO4 floats on the foam to be guided to outside of the tank and the heavy KCl ore slurry flows from the bottom of the upper layer tank to the lower layer tank through a window blind gate valve so as to separate CaSO4 and KCl.

Description

A kind of method of separating the calcium sulfate in the carnallite floatation

Technical field

The present invention relates to the Repone K production technical field, a kind of specifically, the carnallitite that surpasses more than 5% with calcium sulphate content is the method for raw material flotation Repone K.

Background technology

At present, the Repone K potash fertilizer manufacturing enterprise of China 3/4ths, all be to adopt the carnallite floatation explained hereafter, its main flow process is: the raw material carnallitite is through charging machine, be fed on the travelling belt of rotary conveyor, after travelling belt is transported to carnallitite the disassembler 1 that is full of decomposing solution and is carried out rough segmentation and separate, flow automatically to disassembler 2 and carry out middle decomposition, flowing automatically to disassembler 3 again segments when separating, add flotation reagent hydrochloric acid stearylamine and pine camphor oil again, the back flows into the mediation groove and makes decomposition ore pulp and flotation reagent thorough mixing, again through roughly selecting that the flotation unit connects, scan, one is selected, two processes such as selected, obtain kemfert slurry bubble foam, at last kemfert slurry bubble foam is evacuated to centrifuge dewatering and gets product.Wherein calcium sulphate content surpasses the carnallitite more than 5%, is the technical bottleneck that floatation process is produced qualified Repone K.For many years, salt lake slip-stick artist and numerous scientific and technical personnel earnestly explore so far always, almost are that tiny step is not advanced.The enterprise of the carnallite floatation Repone K of China 100% is lower than 5% carnallite floatation Repone K to calcium sulphate content, all is to adopt interpolation calcium remover method to come supplement production, and the carnallitite that calcium sulphate content surpasses more than 5% is all given it up.The former is that microsolubility calcium sulfate is become soluble calcium salt by chemical reaction, is dissolved in the mother liquor, goes out of use together with mother liquor then, and high mother liquor of calcium is penetrated into the underground secondary pollution that causes former halogen, forms vicious cycle.The latter is the behavior that a kind of luxury is abandoned Nonrenewable resources, and concerning a poor potassium country, the consequence of this luxurious behavior is quite serious, is never desirable.

Summary of the invention

The present invention is the deficiency that overcomes in the prior art, and a kind of carnallitite that surpasses more than 5% with calcium sulphate content of proposition is a raw material, and secondary does not impurely descend bittern to produce the technology of Repone K.Method of the present invention comprises following two portions process:

First part is the structure of potassium calcium separator tank:

With the roughly selecting of former carnallite floatation unit, scan, first selected, ore pulp foam chute that second selected each process is connected, replace with potassium calcium separator tank of the present invention.Being constructed as follows of potassium calcium separator tank:

(1) thickness of the length of potassium calcium separator tank, width, external form and used iron plate is consistent with the ore pulp foam chute of former flotation unit, highly is 500～1000 millimeters;

(2) locate to weld a dividing plate for middle 250～500 millimeters at potassium calcium separator tank, dividing plate must be made aslope, ramp slope is the same with the ramp slope of the bottom land of original ore pulp foam chute, but need make steep, in, slow three sections: be respectively that steep section 5 degree, stage casing 3 degree, slow section 1 degree, three segment length sizes are the same, and delaying the sloping end installation venetian blind type gate valve of section, the slope direction of interlayer is opposite with the slope direction of original ore pulp foam chute.So just made groove on the double-deck groove.Interlayer the bottom land of upper strata groove;

(3) above the groove of upper strata, apart from the place of 250～500 millimeters height of bottom land of upper strata groove, shower type shower nozzle or jet pipe are installed for 300～600 millimeters in every interval, and shower nozzle or jet pipe can be together in series or parallel, and by-pass valve control is installed, and rate of flow meter is installed on the main pipe line;

(4), replace former flotation unit ore pulp foam chute, and be welded in original corresponding position with the following groove of potassium calcium separator tank.

Second section is the sepn process of potassium calcium:

During work, ore pulp foam in each carnallite floatation unit, in the scraper plate machine scrapes the upper strata groove, open shower nozzle or jet pipe valve simultaneously (according to the content and the output of Repone K, flow with reference to rate of flow meter, the control water spray is between 200～2000 kilograms in Repone K per ton), shower nozzle or the closely knit little water column of jet pipe ejection are injected in the ore pulp foam.Intensive little water column penetrates foam layer, has washed the foam ore pulp fast.The calcium sulfate that proportion is lighter floats to above the foam, and is guided to predetermined place through the upper strata groove, sells to corresponding enterprise after the treated again purification and does raw material.The Repone K ore pulp that proportion is heavier after intensive little water column washs fine salt fast, flows into lower floor's groove through the venetian blind type gate valve, flows to the flotation unit that is attached thereto through conduit again and carries out final election.The calcium sulfate ore pulp of upper strata groove like this, with the Repone K ore pulp of lower floor's groove, respectively toward about different direction stream.Separate calcium sulfate in view of the above, improved the grade of Repone K.

Advantage of the present invention and effect:

(1) the present invention adopts the physical separation method separating calcium sulphate, do not increase any running cost (because the interior original interpolation fresh water that just needs of flotation unit foam chute itself washs the remaining sodium-chlor extremely harmful to farm crop in the dissolving foam), and can do other industrial chemicals after the solid calcium sulphate processing, stopped the secondary pollution of subsurface brine, open for the flotation of high calcium carnallitite and to have kept away a new approach, expand the limit of mining of bittern widely, prolonged the length of service in salt lake.

(2) the present invention adopts the pure natural resource and the energy, do not increase the material that pollutes, thereby the present invention is the environmental protection method.

(3) the invention solves the difficult problem that floatation process for many years always can not flotation high calcium carnallitite be produced qualified potash fertilizer.

(4) the present invention both can the production calcium sulphate content surpasses the carnallitite more than 5%, again can the production calcium sulphate content be lower than the carnallitite below 5%.Adopt principle of the present invention, can obviously improve the whiteness of potash fertilizer, reduce the consumption of washing fresh water.

Description of drawings

Fig. 1 is a potassium calcium separator tank sectional view of the present invention

Fig. 2 is a potassium calcium separator tank vertical view of the present invention

Illustrated in figures 1 and 2, at the first selected II, roughly select III, lotion pipeline V that separator tank 3 overhung of scanning the IV and the second selected I are equipped with jet pipe 1 and shower nozzle 2; The dividing plate 4 that welding has the gradient in the middle of the separator tank 3 is divided into upper strata groove 5 and lower floor's groove 6 with separator tank 3; Have float hole 8 on slow section of dividing plate 4; Venetian blind type gate valve 9 is equipped with at slow period the sloping end at dividing plate 4; At the second selected I, the first selected II, roughly select III, the separator tank connection of scanning IV is equipped with slide valve 10; Lower floor's groove 6 bottoms at separator tank are equipped with conduit 7.

Embodiment

Adopt the mode of specific embodiment further to explain the present invention below, but the present invention is not limited to these embodiment, embodiment (mother liquor does not reclaim).

In the time of 25 ℃, method for floating and aforementioned deliming method take by weighing 15000kg routinely, and KCl content is 9%, CaSO ₄Content is 7% carnallitite; The raw material carnallitite is through charging machine, be fed on the travelling belt of rotary conveyor, after travelling belt is transported to carnallitite the disassembler 1 that is full of decomposing solution and is carried out rough segmentation and separate, flow automatically to disassembler 2 and carry out middle decomposition, flowing automatically to disassembler 3 again segments when separating, add flotation reagent hydrochloric acid stearylamine and pine camphor oil again, the back flows into the mediation groove and makes decomposition ore pulp and flotation reagent thorough mixing, (roughly select through each flotation unit again, scan, first is selected, second is selected) the trigger of scraping foam is scraped in the last groove of potassium calcium separator tank, operating process through second section obtains kemfert slurry bubble foam, at last kemfert slurry bubble foam is evacuated to centrifuge dewatering, can get content and be 85% Repone K 800kg, content is 80% calcium sulfate 510kg.

Claims

1. method of separating the calcium sulfate in the carnallite floatation, comprise conventional with the raw material carnallitite through charging machine, be fed on the travelling belt of rotary conveyor, after travelling belt is transported to carnallitite the disassembler 1 that is full of decomposing solution and is carried out rough segmentation and separate, flow automatically to disassembler 2 and carry out middle decomposition, flowing automatically to disassembler 3 again segments when separating, add flotation reagent hydrochloric acid stearylamine and pine camphor oil again, the back flows into the mediation groove and makes decomposition ore pulp and flotation reagent thorough mixing, again through roughly selecting that the flotation unit connects, scan, one is selected, two refining process, obtain kemfert slurry bubble foam, at last kemfert slurry bubble foam is evacuated to centrifuge dewatering and gets processes such as product, it is characterized in that:

Roughly selecting of described carnallite floatation unit, scan, first is selected, second selected each process links to each other and is connected to potassium calcium separator tank, the mixed ore pulp foam that contains Repone K and calcium sulfate in each flotation unit, in the scraper plate machine scrapes the upper strata groove of potassium calcium separator tank, open the valve of shower nozzle or jet pipe simultaneously, the control water spray is between 200～2000 kilograms in Repone K per ton, shower nozzle or the closely knit little water column of jet pipe ejection are injected in the ore pulp foam, intensive little water column penetrates foam layer, washing foam ore pulp, wherein the calcium sulfate that proportion is lighter floats to above the foam, and it is guided to predetermined place, treated again purification back is as other industrial chemicals; The Repone K ore pulp that proportion is heavier after intensive little water column washs fine salt fast, flows into lower floor's groove through the venetian blind type gate valve, flows to the flotation unit that is attached thereto through conduit again and carries out final election, isolates calcium sulfate in view of the above, has improved the grade of Repone K,

The structure of the potassium calcium separator tank of described each flotation unit: the thickness of length, width, external form and the used iron plate of (1) separator tank is consistent with the ore pulp foam chute of former flotation unit, highly is 500～1000 millimeters; (2) locate to weld an interlayer for middle 250～500 millimeters at potassium calcium separator tank, interlayer must be made aslope, ramp slope is the same with the ramp slope of the bottom land of original ore pulp foam chute, but need make steep, in, slow three sections: steep section 5 degree, stage casing 3 degree, slow section 1 degree, three segment length are the same, and at the sloping end of slow section the venetian blind type gate valve are installed, and the slope direction of interlayer is opposite with the slope direction of original ore pulp foam chute, so just made groove on the double-deck groove, interlayer the bottom land of upper strata groove; (3) above the groove of upper strata, apart from the place of 250～500 millimeters height of bottom land of upper strata groove, shower type shower nozzle or jet pipe are installed for 300～600 millimeters in every interval, and shower nozzle or jet pipe are together in series or parallel, and by-pass valve control is installed, and rate of flow meter is installed on the main pipe line.

2. according to the described method of claim 1, the potassium calcium separator tank that it is characterized in that the carnallite floatation unit will be done a groove again on the outside of former foam chute, make the groove water jacket of two groove parallel connections, the spination overflow breach of 30～100 millimeters of height, 10～50 millimeters of width is set on the common edge of two grooves, mixed ore pulp is behind spray, the calcium sulfate ore pulp overflows to water jacket by jag, focuses on again.

3. according to the described method of claim 1, it is characterized in that the little round of the potassium calcium separator tank of carnallite floatation unit in slow section spud in 2～6 rows, 0.5～15 millimeter of spacing, 0.5 * 15 millimeter in aperture of separate slot, make kemfert slurry bubble foam can pass through little round, thereby flow to lower floor's groove of potassium calcium separator tank.

4. according to the described method of claim 1, it is characterized in that the bottom land direction of upper strata groove of described potassium calcium separator tank is identical with the bottom land direction of lower floor groove.