Unlock instant, AI-driven research and patent intelligence for your innovation.

Gold extraction technology for direct roasting gold raw ore

A roasting and gold technology, which is applied in the field of gold extraction from refractory primary gold ore, can solve the problems of high cost, heavy pollution, and large investment, and achieve the effects of strong adaptability, simple process, and low investment

Inactive Publication Date: 2005-08-24
赵起
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has a certain effect, it has a large investment and high cost, and its pollution is greater than that of direct roasting of raw ore.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] specific implementation

[0021] The present invention will also be described in further detail in conjunction with embodiment:

[0022] A gold refractory raw ore direct roasting gold extraction process comprises the following steps: (1) crushing the gold raw ore to d 60 Up to -100 mesh, d 97 Less than 3mm; (2) The pulverized gold ore is roasted with high-temperature air at 600-1000°C together with coal or separated by heat storage, and the roasting temperature is 520-800°C;

[0023] (3) After quenching and cooling the calcine with water; then enter the known grinding and dipping process to select and extract gold.

[0024] The flue gas produced by the roasting of the above (2) step re-enters the roaster after being recovered.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A calcine process for directly extracting gold from the primary ore difficult to separate includes such steps as pulverizing the primary ore, calcining along with coal at 520-800 deg.C, cooling, grinding and extracting. Its advantages are high recovery rate of gold (85.65-90%) and low cost and pollution.

Description

technical field [0001] The invention relates to a process for extracting gold from refractory primary gold ore, in particular to a process for directly roasting gold ore to extract gold. Background technique [0002] In the refractory gold production process, roasting oxidation is a very important oxidation treatment process. The raw ore roasting process is the best process for refractory primary gold ore beneficiation, which is superior to the concentrate roasting and concentrate bacterial oxidation process . That is, the recovery rate is greatly improved, and the investment cost and production cost are greatly reduced. [0003] The raw ore roasting is to directly send the mined primary gold ore to the furnace for roasting, thereby changing its chemical composition and physical properties, and turning various compounds of the ore into porous oxides. In order to enter the next leaching process, the exposed gold that has been roasted is effectively leached. [0004] At pre...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/02C22B11/00
Inventor 赵起
Owner 赵起