FI66025C - SEGREGATIONSFOERFARANDE - Google Patents

Description

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Jggjft ']' JTLÄGGNI NGSSKAIFT 06025 C Patent nyBnr.etty 10 03 1934 ^ Patent aeddelat ^ (S1) Ky.lkjlnt.ct.3 C 22 0 15/00 // C 22 B 1/08 FINLAND —FINLAND (21) P »T« nKih ») temut - Pat« nc * r »ftknlnf 705/7 ^ (22) H» k «> ni * pUvl - An * dknlnj * d» j [) 8.03-7 ^ (23) Alkupil '/ t - Glltighcttdag 08. 03.71 * (41) Tullut | ulklseksl - Bllvlt ofofltHf 10.09.7 ^

Patent and Registration Office »(+4) N» h «vIk..panon |. ku «L | ulk.la« date, n ni | git

Patent- och registerstyraleen An * 6kin utlagd och utUU.rlft * n publtcerad (32) (33) (31) Privilege requested —Bejird priorittt 09,03.73 EteIa-Af; i Kan Republic-Sydaf ri kanska Repubi iken (ZA) 73/1658 (71) N i lux Holding Societe Anonymo, 1 Place de la Gare, Luxemt0ur Luxemburg (LU) (72) Michael John Sole, Aldara Park, Randburg, Ete 1 ä-Af rii an l'asa. .

This invention relates to a segregation process in which a substance containing copper or nickel is heated to 0 e0itaVa ^ 1 l otett!

law and is entered into a segregation state to which * aUn ^ mpöM is added

The required so-called reactive wall halide pressure, oaa ^ ionic substance. JPelkisty

Segregation methods are known and involve the recovery of various substances, for example such methane.

‘EJ a tal vista ores. In general, the method heard, ·.,. '' ι "α ^: ί- ainp« ir

contact at elevated temperature with halide s ·, 1ο1 'SaattfirtlU

sodium chloride and a reducing agent such as hin's.

Segregations of L «or 1 ^ 1]. The substance can be mixed with salt:. "° ks ln u,. ......, J / i Peli- ·? Kdns3a, after which the mixture is heated to elevated" " v ^ after which the reducing agent is added to the heated - "JärnPÖti-> 0 substance. an>

The metal in the material in the segregation chamber Segre-ma 0 ° J11un · in the metallic state to the spaces between the constituents <And * errost-.

* »Uava 1 1 r Uu istrotion of body parts or bodies of such parts» ^ ^ '' ° eati pe ^

Although many metals can be segregolda in this se- ».

for commercial reasons the method is used in the main thing · !!. J '' 'Tlehete jn · ..

‘UG3t i lr, 1 1 1 ä * uparir. ; 'r' ia __: - U..

9 ..........- ,, - v. ,,, 6: J 0 2 5

One of the oldest segregation methods is the ILL. pa t. ent r. i, ij] -kaumasa 1 "9 33 7. There are also later kt.-ri tv forms, for example the one disclosed in k.I '. 3 3 (··.? (o, according to which heating takes place). before segregation in the fluidized bed.

With the recent development of the segregation method, its use has been proposed for sulphide concentrates. According to this proposal, the concentrates are preheated to remove sulfur and provide oxide product for the Segmentation process. In practice, it has been found that this method has the disadvantage of sintering and aggiomero.it urr.i sta ancestor during heating, which. leads to incomplete ri / in pc history and finally to incomplete segregation. Then also f 2 ui d i s o i t. Uni r is bad if Let u; daat iornene t e j mu, the flow of the substance is already food.

PC ly losses also cause a difficult problem in taking r.uemio concentrates with high metal concentrations.

Naturally, the dust puppet problem also occurs in U.S. Pat. in the segregation method of U.S. Pat. No. 3,300,290, regardless of the substance used therein.

It is an object of the present invention to provide a segregated apple suitable for use as a sulphide concentrate. c and either reduce the dust problem.

Thus, according to the invention, there is provided a method of segregation in which a substance containing a serrating metal is heated to an elevated temperature and fed to a segregation system to which the reagents required to effect segregation are added. The features of the invention will become apparent from the claims. The most suitable heating is performed in a fluidized bed.

The substance is the most suitable sulphide concentrate and the heating step is sufficient to remove sulfur from the concentrate, for example to reduce the sulphide content to less than 1%, preferably less than 0.5 Z.

The agglomerated material may be in the form of granules, spheres, tablets, briquettes or the like, having a maximum dimension of not more than 3 mm, 3 6 5025 and typically between 0.5 mm and 2 mm. The agglomeration can be effected by any known method, for example by extrusion, compression or weighting.

The balls are preferably dried, for example, at a temperature of 150 to 250 ° C before the heating step.

Small balls fluidize easily, are stronger, and do not break easily.

An embodiment of the invention will be described with reference to the accompanying flow chart, which illustrates a process using a calcined copper sulfide flotation concentrate.

The concentrate is thickened, filtered and tumble dried in the usual way. The water from the filter can be recycled to the plant to make the concentrate and the water from the tumble dryer is discharged to the outside air. The flotation concentrate usually contains 10% water.

2% sulfuric acid is added to the dried concentrate to provide greater crude strength. The mixture is then fed to a conventional spheronizing machine, where spheres about 0.5 to 3 mm in diameter are formed. The beads are then dried at a temperature of about 150-25 ° C.

The dried spheres are transferred to a first fluid bed layer roaster that operates autogenously at a temperature of about 85 ° C to 1050 ° C to reduce the sulfide content to less than 1%. The travel speed is about 60 to 210 cm / s and the residence time is relatively short, for example 1 to 20 minutes to prevent the formation of excessive copper ferrates. Any resulting ore powders are recycled through cyclones to the spheronization step.

The sulfur dioxide evolved is converted to sulfuric acid for the spheronization step.

If desired, the activation of the spheres can be performed by heating them in a second fluidized bed applicator at a temperature of about 750 ° C in the presence of air L'ai. All possible ore powders can be passed through cyclones to either a chopping machine or a segregation step. Now _ "r

A

6 5025 balls are effortlessly supported o o o '' • '' d1 .. οναΐ h e.n.

Hot beads are added to the oegregation ortarrow, and Jose's usual halide and reducing reagents are added to effect the reaction. Segregated or neon streams are recovered in the usual way using screening and application. Defective products from the causticization step can be recycled to the spheronization step and j.ät * - 'substance, P ° o.stui-aa, 1.

Example 1

Calcined copper ore Ifidivaandot-usi ij <.a. t. e- ^ a Dried in and bottled as described above. nuivat U ..a. the concentrate had the following composition:

Cu: * VN 1%

Pc CO $ OaC * MgO 1% S 30%

Si09 3% water 10%

The spheres were heated in a quartz reactor at a temperature of 900 ° C for one hour. 3en after par lot. were activated by heating them in a second fluidization coaster at a temperature of about 750 ° C in a stream of air. The deaf spheres were introduced into the chamber and the charge was enriched with 1% sodium chloride for one hour at 750 ° C. The product obtained from Lkupcräic pellets contained copper, copper / coke agglomerates and loja rsasia. When the fine particles were combined with the tupo L f. · I p,,. , ...

with a yield of 9n% grades n 66%. ota s.

copper, while the agglomerates alone contained 8% by weight of copper. Rejecting spheres are easily separable in my copper i.v, ·,. . , .____. . '' 'Echoes from agglomerates by physical methods, osimet-iU. · - enamel.