公开(公告)号：US3542540A

公开(公告)日：1970-11-24

申请号：US3542540D

申请日：1968-10-30

Applicant: US INTERIOR

Inventor： HEINEN HAROLD J ,  EISELE JUDITH A ,  BAKER DON H JR ,  SCHEINER BERNARD J

IPC: C22B3/16 ,  C22B11/08 ,  C22B15/08

CPC classification number: C22B3/165 ,  Y02P10/234

公开(公告)号：US3890007A

公开(公告)日：1975-06-17

申请号：US44043274

申请日：1974-02-07

Applicant: US INTERIOR

Inventor： HEINEN HAROLD J ,  CARNAHAN THOMAS G ,  EISELE JUDITH A

IPC: E21B43/28 ,  E21C41/22 ,  E21C41/14

CPC classification number: E21C41/16

Abstract: Copper porphyry ores, especially those too deeply buried for conventional open pit mining, are mined in place by an in situ leaching technique using as a leaching medium a mixture of dilute sulfuric acid, oxygen and an alkali metal or ammonium chloride salt. The chloride ion speeds dissolution of copper minerals, especially chalcopyrite, and the alkali metal or ammonium ion reacts with iron and sulfate in the leaching medium to deposit iron in the form of crystalline jarosites. Precipitation of iron within the ore body as a jarosite maintains the permeability of the ore body to the leaching medium thus increasing both the rate and the total recovery of copper as well as depleting the leach solution of unwanted iron.

Abstract translation: 铜矿斑岩，特别是对于常规露天开采深埋的铜矿斑岩，通过原位浸出技术开采，作为浸出介质，稀硫酸，氧和碱金属或氯化铵盐的混合物。 氯离子加速了铜矿物，特别是黄铜矿的溶解，碱金属或铵离子与浸出介质中的铁和硫酸盐反应，以结晶的白云石的形式沉积铁。 作为黄钾铁矾在矿体内沉淀铁保持矿体渗透介质的渗透性，从而提高铜的速率和总回收率以及消耗不想要的铁的浸出溶液。

公开(公告)号：US3912330A

公开(公告)日：1975-10-14

申请号：US44771674

申请日：1974-03-04

Applicant: US INTERIOR

Inventor： CARNAHAN THOMAS G ,  HEINEN HAROLD J

IPC: E21B43/28

CPC classification number: E21B43/28

Abstract: Copper porphyry ores, especially those too deeply buried for conventional open pit mining, are mined in place by an in situ leaching technique using as a leaching medium a mixture of dilute sulfuric acid, oxygen and nitrate ion added either as nitric acid or as an alkali metal or ammonium nitrate salt. The nitrate ion speeds dissolution of copper minerals, especially chalcopyrite, and the alkali metal or ammonium ion reacts with iron and sulfate in the leaching medium to deposit iron in the form of crystalline jarosites. Precipitation of iron within the ore body as a jarosite maintains the permeability of the ore body to the leaching medium thus increasing both the rate and the total recovery of copper as well as depleting the leach solution of unwanted iron.