CN87100880A

CN87100880A - The separation method of diamond

Info

Publication number: CN87100880A
Application number: CN87100880.7A
Authority: CN
Inventors: 刘鸿吉
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-01-26
Filing date: 1987-01-26
Publication date: 1987-12-23
Also published as: CN1014960B

Abstract

A kind of separation method of diamond, by adopting the wet concentration pyrophyllite, catalyst alloy is removed in electrolysis, inhibitor is added in ball milling, screening back, Classification Desk shakes with little shaking and removes graphite respectively, with the new technology of innocuous high-density liquid purified treatment, isolates pure diamond.The inventive method has been abandoned the soda acid processing, has reduced a large amount of pollution sources, can reduce cost significantly simultaneously, reduces adamantine loss, and can simplify working process, and shortens the production cycle, real Perfected process for the diamond separation.

Description

The separation method of diamond

The present invention is a kind of separation method of diamond.

Since the technology of artificially synthesizing diamond is come out, with diamond from graphite, pyrophillite, separate in the mixture of catalyst alloy association nothing more than adding chemical method (the 6th grinding wheel factory, Kweiyang has technology now) for pure chemistry method (publish referring to 1975, solid-state physics teaching and research room of Jilin University height is pressed into group and compiles " diamond " the 244th page) and gravity.The pure chemistry method mainly adopts strong acid dissolving or electrolysis to remove catalyst alloy, removes graphite with the perchloric acid oxidation, removes pyrophillite with alkali treatment again.The pure chemistry method is seriously polluted, directly influence health, and the chemicals waste is serious, because strong acid effect, diamond intensity is affected, it is earlier with the diamond synthetic rod that gravity adds chemical method, the electrolytic recovery catalyst alloy, ball milling on ball mill is then removed graphite and pyrophillite about 70% with the gravity tossing on xcy-73 type shaking table of the electrolytic slime behind the ball milling, carries out ball milling again through shaking the mine tailing of sending, repeat tossing, and the concentrate that will contain a small amount of graphite and pyrophillite is removed graphite with sulfuric acid and the processing of nitric acid mixed liquor, and then carries out alkali treatment with NaOH, removes pyrophillite.Use chemicals though this method is lacked than the pure chemistry method, fail the contaminated solution problem, and it is big to run off, efficient is low.

The object of the present invention is to provide and a kind ofly can abandon acid, alkali treatment, get rid of a large amount of pollution sources, reduce the diamond separation method that runs off.

Feature of the present invention is a wet concentration pyrophillite at first, and then catalyst alloy is removed in electrolysis, sieve after again the material ball milling being become electrolytic slime, adopt to add inhibitor respectively Classification Desk shake with the little gravity methods of shaking of classification and remove graphite, remove remaining micro-pyrophillite and graphite with heavy-fluid stage purification processing, isolate pure diamond concentrate.

The processing procedure that the present invention proposes is performed such, to contain catalyst alloy earlier, graphite, pyrophillite, adamantine diamond synthetic rod, with the clear water flushing, remove a large amount of pyrophillites, again catalyst alloy is removed in its electrolysis, material ball milling after the electrolysis, make to breed to be monomer dissociation at graphite diamond therebetween and to come out, again electrolytic slime standard sieve classification, after adding inhibitor, respectively classification is on the desk-top shaking table and tossing on the miniature shaking table, remove graphite, the mine tailing that tossing goes out returns ball mill, repeats tossing behind ball milling again, return mill, return and select two to three times, the chats that tossing goes out will repeat tossing, return and select two to three times, and the concentrate that tossing goes out is handled with the heavy-fluid classification, remove remaining micro-pyrophillite and graphite, isolate pure diamond concentrate, gained diamond concentrate product also divides good level by granularity simultaneously.

The present invention is divided into electrolytic slime-30+36 with standard ,-36+46 ,-46+60,-60+70 ,-70+80 ,-80+100,-100+120 ,-120+150 ,-150+180,-180 with thin ten ranks, make other component of each grade on each shaking table that adapts and tossing under the condition that adapts, reduced the loss of diamond in the tossing process, strengthened separating effect, and the component more than 30 orders is returned ball mill, repeat ball milling.

The inhibitor that is added among the present invention, preferably adopt synthetic detergent, make it in tossing, to reduce adamantine loss, if in the time of controlling the synthetic detergent addition and make electrolytic slime PH is 8-10 under the aqueous medium effect, loss can reduce to minimum degree, makes that diamond content is no more than 0.5% in the mine tailing.

Classification Desk respectively of the present invention shakes with little and shakes, and is with-30+36 ,-36+46,-46+60,-60+70, five other components of level of-70+80 respectively at stroke less than 6mm, jig frequency is tossing on the desk-top shaking table more than 500 times/minute, general-80+100,-100+120 ,-120+150 ,-150+180,-180 is 0～1.5 millimeter at stroke respectively with thin 5 other components of level, and jig frequency is tossing on 3000 times/minute the miniature shaking table.

The present invention purifies, and adopting proportion is 2.9～3.0 gram/cm ³The innocuous high-density liquid classification handle, remove remaining micro-pyrophillite and graphite, it is separable that to go out pure degree be diamond concentrate more than 95%.

Finish the separation of diamond with the inventive method, a large amount of pyrophillites have been removed owing to adopt washing, adopt respectively Classification Desk to shake and remove graphite with little method of shaking, thereby abandoned acid, alkali treatment and reduced the loss of diamond in separation process, selected suitable inhibitor for use, further reduced adamantine loss, selected for use the rational innocuous high-density liquid of proportion to carry out purified treatment, guaranteed adamantine pure degree, compared with original pure chemistry method, got rid of pollution significantly, saved a large amount of chemicals, alleviated diamond intensity and be subjected to sour influence, added chemical method relatively with original gravity, got rid of by soda acid and handled the pollution that causes, saved acid, the chemicals that alkali treatment is used has reduced adamantine loss significantly, has guaranteed adamantine pure degree, simplified operation, improved efficient, on economic effect, the production cycle that original gravity adds chemical method is 10 days, in the separation diamond run off about 25%, about 0.79 yuan/carat of cost; The inventive method, the required production cycle needed only 5 days, and diamond runs off and is no more than 4.5%, about 0.01 yuan/carat of cost in the separation.Therefore, the comparable original gravity of the present invention adds chemical method can the shortening cycle 1/2nd, and it is about 20.5% to reduce adamantine loss, reduces cost 0.78 yuan/carat.

Embodiment:

The diamond synthetic rod is put in Lou in the wooden dipper, puts that Lou wooden dipper is in enamel box, with running water flushing, limit flushing, leakage wooden dipper is shaken on the limit, and when looking the pyrophillite chip of ashless white tone, washing finishes.

With washed diamond synthetic rod, the electrolytic method input electrolytic cell that adds chemical method by original gravity carries out electrolysis.

The ball grinding method ball milling on XMQ240 * 90 type conical ball mills that material after the electrolysis is added chemical method by original gravity.

The electrolytic slime of ball milling gained is sieved with standard, be divided into-30+36 ,-36+46 ,-46+60 ,-60+70 ,-70+80 ,-80+100 ,-100+120 ,-120+150 ,-150+180 ,-180 with thin ten ranks, treat that each rank respectively gathers the above preparation of 1000g tossing.

-30+36 ,-36+46 ,-46+60 ,-60+70,5 ranks of-70+80 will tossing on the desk-top shaking table of TY-500 type ,-80+100-100+120 ,-120+150 ,-150+180 ,-180 will tossing on the miniature shaking table in XZYW-400 * 250 with 5 thin ranks.

Before the tossing, in the electrolytic slime of assembling, add water earlier, add several washing agent again, stir evenly, making PH is 10, then shaking table is debugged, no matter be the miniature shaking table of desk-top shaking table of ZY-500 type and XZYW-400 * 250, every select a rank before, all earlier with this other electrolytic slime of level (having added entry and inhibitor) of tossing a little, shaking table is carried out stroke, jig frequency, the adjustment of inclination angle and discharge, the branch that transfers to the shear surface fluid layer is with when distinct, just electrolytic slime can be had rhythm all to drop in the feed launder with measuring, carries out tossing.Because dither under aqueous medium, by different proportion, the diamond concentrate just flows into concentrate hopper, contain partly adamantine graphite and flow into the chats groove, after the collection, still return tossing again, return and select three times, graphite and pyrophillite granulometric impurity flow into tail-box, mine tailing returns to twice of ball mill ball milling again, return and select twice, each other diamond concentrate of level is put into respectively in the enamelled cup, add ZY-1 type heavy-fluid, the diamond concentrate will sink to the bottom, remaining graphite and pyrophillite are suspended in the upper strata, thereby further purify, and isolate pure diamond concentrate.

Electrolytic slime 2000 grams adopt above-mentioned method to separate, and the pure degree of gained product test diamond concentrate is 96.2%, and diamond content is 0.482% in the mine tailing.

Claims

1, a kind of separation method of diamond, comprise electrolysis diamond synthetic rod, again with the material ball milling after the electrolysis, adopt separation by shaking table then, it is characterized in that, remove a large amount of pyrophillites with clear water flushing diamond synthetic rod earlier before the electrolysis diamond synthetic rod, with the screening of the electrolytic slime behind ball milling back add inhibitor respectively Classification Desk shake with little and shake, remove graphite, handle with the heavy-fluid classification again and remove remaining micro-pyrophillite and graphite.

2, the method for claim 1 is characterized in that, with electrolytic slime press sizing for-below the 30+36(30 order, more than 36 orders, below roughly the same),-36+46 ,-46+60 ,-60+70 ,-70+80 ,-80+100,-100+120 ,-120+150 ,-150+180 ,-180 with thin 10 ranks.

3, the method for claim 1 is characterized in that the inhibitor that adds is a synthetic detergent.

4, the method for claim 1 is characterized in that handle-30+36 ,-36+46,-46+60,-60+70, greater than 500 times/minute, stroke is less than classification tossing on the desk-top shaking table of 6mm in jig frequency for five other components of level of-70+80,-80+100,-100+120 ,-120+150 ,-150+180,-180 is 3000 times/minute with thin five other components of level in jig frequency, and stroke is classification tossing on the miniature shaking table of 0～1.5mm.

5, the method for claim 1 is characterized in that the heavy-fluid that is adopted is proportion 2.9～3.0 gram/cm ³Innocuous high-density liquid.