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Kust kulda leitakse ja kuidas seda kaevandatakse

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Kategooriad: Juveelid

Autor: OmniaOro

Kulda oma olekus leidub kvartskivimites niitide, täppide ja fooliumide kujul, sageli segatuna hõbeda mineraalidega.

Või võib seda leida ka jõesängides, segatuna liivaga, terade ja tükkidena.

Kulla kaevandamine

Kulla ekstraheerimist saab praktiseerida kolme erineva protsessiga: silumine , liitmine ja tsüaniidimine . Siiski ei ole alati vaja kasutada kõiki kolme protsessi.

Silumine toimub pikkade anumate abil, mis võimaldavad kulla eraldamist, lastes aeglasel veejoal voolata. Tegelikult tõmmatakse kullast kergem jääkmaterjal koos veega kaasa, samas kui väikesed kullatükid vajuvad konteineri põhja.

Amalgameerimisel jahvatatakse tooraine pulbriks, mis seejärel ühendatakse elavhõbedaga. Seejärel saadakse väärismetall amalgaami destilleerimise teel.

Tsüaniideerimine on kõige olulisem ekstraheerimisprotsess. Kullamaagid töödeldakse kaaliumtsüaniidi lahusega, õhu juuresolekul kuld sulab ja muutub aurokaaliumtsüaniidiks. Kulla eraldamine sellest lahusest toimub tsingiga ja elektrolüütiliselt.

Kulla omadused

Kuld on oma olekus punakaskollane, läikiv, muutumatu ja tempermalmist (metallidest kõige tempermalmist). Viimasel põhjusel ja selle töötlemise võimaldamiseks legeeritakse see teiste metallidega. Ükski tavaline hape ei mõjuta seda, välja arvatud aqua regia, kloorivesi ja leeliselised tsüaniidid. Selle sulamistemperatuur on 1063° ja keemistemperatuur 2600°.

Suurimad kullatootjad on Lõuna-Aafrika Vabariik, Hiina, USA ja Austraalia.

Kommentaarid

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  • EVANS PHILIP
    mag 4, 2024
    Amazing Love Spell To Get Back With your Partner and Fix Your Broken Relationship  WHATSAPP+2349161779461rnrnMy wife broke up with me 3 months ago, and forced me to sign the divorce papers, and I was completely heartbroken. And I could not get back into any shape emotionally. I Thank God for this astonishing and brilliant spell caster that came to my rescue. Wow! This spell caster has helped me so much. Dr Jakuta guaranteed me an urgent 24hrs spell casting, of which I accepted it. Shockingly! this month my wife called me back with lots of apologies after 48hrs which he assured me, and he did everything possible to withdraw the divorce papers which was previously ongoing with the power of this miracle working spell caster. Some people testified that he brought their Ex lover back, some testified that he restores womb, cure cancer, herpes simplex virus and other sickness, Thank you so so so much Lord for your powerful spells. expressions are not sufficient to say thank you. Email doctorjakutaspellcaster24@gmail. com. You can also WhatsApp him on +2349161779461

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