CN101935754B

CN101935754B - Method for treating lead-containing high electrum concentrate

Info

Publication number: CN101935754B
Application number: CN2010102866138A
Authority: CN
Inventors: 张俊峰; 王元; 邹琳; 张艳峰; 钟庆利; 朱家辉
Original assignee: SHANDONG HUMON MELT STOCK Ltd
Current assignee: SHANDONG HUMON MELT STOCK Ltd
Priority date: 2010-09-17
Filing date: 2010-09-17
Publication date: 2012-07-25
Anticipated expiration: 2030-09-17
Also published as: CN101935754A

Abstract

The invention discloses a method for treating lead-containing high electrum concentrate. The method comprises the following steps of: alkaline bleaching pretreatment; primary grading; ore grinding; primary oxidation and lead removal; primary leaching; secondary grading; secondary ore grinding; primary dense washing; secondary oxidation and lead removal; second leaching; secondary dense washing; tailings pressing and filtering; pregnant solution replacement and treatment, and the like. The method is characterized in that the cyanidation and recovery rates of gold and silver are furthest improved through changing cyaniding chemicals, i.e. the traditional lime is changed into sodium hydroxide and ammonium bicarbonate, and then hydrogen peroxide as an auxiliary oxidation chemical is used for removing lead sulfide.

Description

The treatment process of the silver-colored gold ore of a kind of leaded height

Technical field:

The present invention relates to the processing technology field of gold ore, is the treatment process of the silver-colored gold ore of a kind of leaded height specifically, is adapted to the processing of the high silver-colored gold ore of leaded >=2%.

Background technology:

As everyone knows, at present the treatment process of high silver-colored gold ore generally has two kinds, the conventional directly cyanide process of the first, and it two is baking cyaniding methods.Because the baking cyaniding method can make the reaction of part silver generate silver silicate in stoving oven when handling high silver-colored gold ore; And silver silicate is difficult to dissolved by prussiate; So the cyaniding recovery of silver was handled low many when the baking cyaniding method was handled high silver-colored gold ore than direct cyanide process; So high silver-colored gold ore is generally handled with direct cyanide process; But conventional high silver-colored gold ore is few, and most of gold ore is leaded more, utilizes existing direct cyanidation technology to handle and exists lead sulfide, lead sulfate wrapping portion gold and silver to make the not high problem of the recovery.

Summary of the invention:

The objective of the invention is to overcome the deficiency of above-mentioned prior art, and the treatment process of the silver-colored gold ore of a kind of leaded height is provided, mainly solve existing direct cyanidation technology processing and exist lead sulfide, lead sulfate wrapping portion gold and silver to make the not high problem of the recovery.

In order to achieve the above object, the present invention is achieved in that the treatment process of the silver-colored gold ore of leaded height, and its special character is that it comprises following process step:

A alkali soaks pre-treatment, and adding the cyaniding medicament is sodium hydroxide, bicarbonate of ammonia, and add-on is that 3.5-5Kg/T does the ore deposit, continuous, evenly adding;

B scalping, ore grinding, alkali soak pretreated ore pulp through scalping, an ore grinding, get into before soaking dense, before soaking after dense your liquid and underflow ore pulp;

C once oxidation deleading adds ydrogen peroxide 50 in the thickened underflow ore pulp before soaking, add-on is that 25-35Kg/T does the ore deposit, and continuous, evenly adding is carried out deleading and handled;

D once leaches, and the ore pulp behind the deleading adds sodium cyanide and once leaches;

The classification of e secondary, secondary grinding, once dense washing get into once dense washing behind the classification of the ore pulp that once leaches process secondary, the secondary grinding, obtain containing little your liquid of gold and silver, and little your liquid gets into alkali and soaks pretreatment stage;

F secondary oxidation deleading is once adding ydrogen peroxide 50 in the dense washing underflow ore pulp, and add-on is that 25-35Kg/T does the ore deposit, and continuous, evenly adding is carried out deleading and handled;

The g secondary leaches, the dense washing of secondary, and the ore pulp behind the deleading adds sodium cyanide and carries out the secondary leaching, carries out the dense washing of secondary then, obtains containing little your liquid of gold and silver, and little your liquid gets into the once dense washing stage;

The press filtration of h mine tailing, ore pulp after the dense washing of secondary through mine tailing press filtration filter, must filtrate and the cyaniding quarrel, filter cake cyaniding slag is sold outward as the sulphur concentrate or the raw material of stoving oven, filtrating is all returned the dense washing flow of secondary and is used;

The expensive liquid replacement Treatment of i, golden liquid obtains gold mud through purification, deoxidation, zinc dust precipitation, and lean solution is all returned the dense washing flow of secondary and is used.

The treatment process of the silver-colored gold ore of leaded height of the present invention, the described cyaniding medicament of a step are after bicarbonate of ammonia and sodium hydroxide are mixed in 1: 1 ratio of mass ratio, and adding cyanide barren solution, to be made into mass percent be 10% solution; The purpose that adds sodium hydroxide, bicarbonate of ammonia is: 1, alkali soaks removal of impurities; 2, the pH value in the assurance cyaniding process; 3, the lead sulfate in the ore deposit is converted into lead carbonate, fully exposes thereby make by the gold and silver of lead carbonate parcel.

The treatment process of the silver-colored gold ore of leaded height of the present invention, the concentration of volume percent of c step and the described ydrogen peroxide 50 of f step is 27-30%; The purpose that adds assisted oxidation medicament ydrogen peroxide 50 is to utilize the strong oxidizing property of ydrogen peroxide 50 with the lead sulfide oxygenolysis in the ore deposit, and the gold and silver that the sheath that cures is wrapped up in are fully exposed.

Compared with present technology the treatment process of the silver-colored gold ore of leaded height of the present invention has outstanding substantive distinguishing features and marked improvement; Contain the Jin Gaoyin gold ore for leaded higher (Pb >=2%); Through changing the cyaniding medicament; Be about to used lime and change sodium hydroxide, bicarbonate of ammonia into, increase a kind of assisted oxidation medicament ydrogen peroxide 50 again and remove lead sulfide, can improve the cyaniding recovery of gold and silver to greatest extent.

Description of drawings:

Fig. 1 is a process flow sheet of the present invention.

Embodiment:

In order to understand better and to implement, the present invention is elaborated below in conjunction with process flow sheet.

Embodiment 1, referring to Fig. 1, is example with certain, and this ore deposit multielement analysis is following: Au:34.5g/t, Ag:3860g/t, Cu:0.19%, S:33.5%, As:0.2%, C:1.37%, Pb:2.6%; Adopt following process step to handle:

1, alkali soaks pre-treatment; Adding the cyaniding medicament is sodium hydroxide, bicarbonate of ammonia, is after bicarbonate of ammonia and sodium hydroxide are mixed in 1: 1 ratio of mass ratio, and it is 10% solution that the adding cyanide barren solution is made into mass percent; Add-on is that 3.5-5Kg/T does the ore deposit, continuous, evenly adding;

2, scalping, ore grinding, alkali soak pretreated ore pulp through scalping, an ore grinding, get into before soaking dense, before soaking after dense your liquid and underflow ore pulp;

3, once oxidation deleading adds ydrogen peroxide 50 in the thickened underflow ore pulp before soaking, the concentration of volume percent of ydrogen peroxide 50 is 27-30%, and add-on is that 25-35Kg/T does the ore deposit, and continuous, evenly adding is carried out deleading and handled;

4, once leach, the ore pulp behind the deleading adds sodium cyanide and once leaches;

5, secondary classification, secondary grinding, once dense washing get into once dense washing behind the classification of the ore pulp that once leaches process secondary, the secondary grinding, obtain containing little your liquid of gold and silver, and little your liquid gets into alkali and soaks pretreatment stage;

6, secondary oxidation deleading is once adding ydrogen peroxide 50 in the dense washing underflow ore pulp, and the concentration of volume percent of ydrogen peroxide 50 is 27-30%, and add-on is that 25-35Kg/T does the ore deposit, and continuous, evenly adding is carried out deleading and handled;

7, secondary leaching, the dense washing of secondary, the ore pulp behind the deleading add sodium cyanide and carry out the secondary leaching, carry out the dense washing of secondary then, obtain containing little your liquid of gold and silver, and little your liquid gets into the once dense washing stage;

8, mine tailing press filtration, ore pulp after the dense washing of secondary through mine tailing press filtration filter, must filtrate and the cyaniding quarrel, filter cake cyaniding slag is sold outward as the sulphur concentrate or the raw material of stoving oven, filtrating is all returned the dense washing flow of secondary and is used;

9, your liquid replacement Treatment, golden liquid obtains gold mud through purification, deoxidation, zinc dust precipitation, and lean solution is all returned the dense washing flow of secondary and is used.

The test data contrast table of the silver-colored gold ore of leaded height that method of the foregoing description 1 and existing method are handled is following:

The silver-colored gold ore of leaded height in the last table adopts old process, medicament (being sodium cyanide, lime) to carry out direct cyaniding and handles, and the cyaniding recovery of gold is 91.73%, the cyaniding recovery of silver has only 65.59%, poor effect; And change bicarbonate of ammonia, sodium hydroxide into through alkali being soaked the added lime of pre-treatment; After increasing by twice oxidation deleading processing (oxidation deleading medicament is a ydrogen peroxide 50) again; The cyaniding recovery of gold can reach 94.6%, the cyaniding recovery of silver can reach 94.02%; The cyaniding recovery of gold and silver improves 2.87%, 28.43% respectively, and effect is very obvious.

Claims

1. the treatment process of the silver-colored gold ore of leaded height is characterized in that it comprises following process step:

A alkali soaks pre-treatment, and adding the cyaniding medicament is sodium hydroxide, bicarbonate of ammonia, and add-on is that 3.5-5Kg/T does the ore deposit, continuous, evenly adding; Described cyaniding medicament is after bicarbonate of ammonia and sodium hydroxide are mixed by mass ratio at 1: 1, and adding cyanide barren solution, to be made into mass percent be 10% solution;

C once oxidation deleading adds ydrogen peroxide 50 in the thickened underflow ore pulp before soaking, add-on is that 25-35Kg/T does the ore deposit, and continuous, evenly adding is carried out deleading and handled; Described ydrogen peroxide 50 concentration of volume percent is 27-30%;

F secondary oxidation deleading is once adding ydrogen peroxide 50 in the dense washing underflow ore pulp, and add-on is that 25-35Kg/T does the ore deposit, and continuous, evenly adding is carried out deleading and handled; Described ydrogen peroxide 50 concentration of volume percent is 27-30%;