1. The Method of Extracting Copper from the Mixed-Type Copper Deposit (Invention Patent)
The crushed sulfurized and oxidized copper ore is processed in order to obtain high-purity cathode copper. The combined technics of the whole-wet method does not need grinding and grading, roasting and acid-making with gas, therefore the tailings and slap are easy to heap because of their thick particle size. It possesses the merits of high recovery rate, low cost, small input and zero pollution, and can bring new development to the metallurgical industry in the regions where such mixed-type copper mine resources are found.
2. The Method of Continuous Preparation of Pure Gold Sol (Invention Patent)
The invention is a kind of method that uses laser to bombard the solid-liquid interface for continuous preparation of pure gold sol. It can continuously prepare the pure gold sol that does not contain excessive reducing agents and their by-products, protecting agents, dispersants and other harmful foreign matters and can be, as an additive, directly applied, without purification, to the industries of microelectronic device, extra-large scale integrated chips, medicine, immune markers as well as foodstuff, drinks, drinking water, liquor, cosmetics, etc.
3. The Close-type Electrolytic Cell (Instructions for Practical New-Type Patent)
The device is able to isolate the acid harmful gas produced in the electrolytic cell during the wet-method metallurgical production and lead it away from the exhaust pipe, improving the operators’ working environment and reduce the harm of the occupational disease. The electrolytic cell is simple in structure and easy to operate, fit for application in the wet-method metallurgical electrowinning process.
4. The Self-Flow Static-Adsorption Method in Heap Leaching (Invention Patent)
The invention is a kind of self-flow static-adsorption method in the heap leaching of gold mines. It adopts the open-type non-fluidized fixed-bed adsorption trough and, through selection of the advantageous of the mine, arranges several adsorption troughs in a cascade by series connection. Then it selects the appropriate carbon-layer height and the adsorption time according to different grades and flow rates of the pregnant solution so as to obtain ideal adsorption rate. The whole adsorption process, featured by static and automatic flow, has no power consumption and wear of active carbon and is low in labor intensity.
5. The Self-Tightening Lifting hook for Massive Ore (Instructions for Practical New-Type Patent)
The hook is composed of such components as the three claws, positioning ring, straining rope, etc, with its shape resembling the hook used in steaming the rice in households. When in use, the three claws hitch the ore, and the tightening rope, which has self-tightening effect, will tighten more forcefully if the ore is heavier. It owns the virtues of convenience, safety and high efficiency, and is the best substitute for lifting with steel-rope binding.
6. The Mineral Selection Method for Low Grade Oxidized Gold Ore (Invention Patent)
The invention is a kind of mineral-selection method that is able to increase the recovery rate of low-grade oxidized gold ore which has high content of mud and coarse gold. It combines the three technics of heap leaching, gravity separation and carbon in leaching, overcomes the shortcoming of high content of mud which affects the permeability of heap leaching and shortens the leaching cycle of heap leaching. As a result, the beneficiation recovery has been remarkably increased to more than 80% over the single heap leaching process, and the precious resources can be fully utilized.
7. The Close-Type Conditioning Device for Minute Dip-Dye Gold Mine (Practical New-Type Patent)
It is a sort of close-type conditioning device for minute dip-dye gold mines, possessing the characteristics of high recovery, economy of investment, low cost, environmental friendliness, small labor intensity of workers, etc and suitable for large-scale industrialized production of gold mines and gold concentrates which are hard to deal with and recovery of noble metals and non-ferrous metals from complex non-ferrous metal mines.
8. The Open-Type Adsorption Device for Non-Fluidized Fixed Bed (Practical New-Type Patent)
The device is applicable to the gold extracting process by the heap-leaching method or the activated-carbon adsorption process by the all-sliming cyanidation and counter-current washing in the gold industry, and it is the key equipment of the adsorption system. It possesses the virtues of high adsorption rate (≥98%), no wear of active carbon, easy operation, large range of operational flexibility (1～200m3/h), no power consumption in the course of adsorption, etc. It is the best replacement for the traditional）adsorption column.
9. The Technics That Lixiviates Copper from Sulfurized Copper Mine by Using the Acid Pit Water of the Bacteria-Containing Copper Mine (Invention Patent)
The invention is a new technics that applies the acid pit water of the bacteria-containing copper mine to lixiviate sulfurized copper ore. It can fully utilize the mineral resources, improve the recovery level of copper, save the cost, increase the profit, and enhance the product quality, at the same time turn the acid pit water of the mine into valuable things, reduce the expenses of environment-protection treatment, and lessen the pressure of environmental protection.
10. A leaching method for complex Copper sulfide-bearing Gold concentrate (invention patent)
A method for hydrometallurgy process, especially for leaching the complex Copper sulfide -bearing Gold concentrate is provided in this patent. The ore is pulped, stirred； Cu , Au and Ag are recovered respectively by solvent extraction or by cyanide, subsequently reduced by zinc powder；the residue is refloated, dissolved, subsequently filtered at a relatively high temperature to recover sulfur. In the process of stirring, one or several catalyzers , which can alter the surfactivity of the copper sulfides, such as iron nitrate, iron sulfide, iron chloride, vanadium oxide, manganese compound and titanium compound are added with a quantity of 0.05～1.0mol/L. This invention can be applied to the oxidizing leaching process at a normal atmosphere and low temperature, and it can be easily controlled by simple operation. The method also has the features of environmental safety, low cost, high leaching of gold, silver, copper with low content of impurities. Furthermore, it can recover sulfur in the process.
11.A bottom feeding equipment in an absorption tower for absorbing gold from heap leaching liquid(utility model patent)
This utility model patent presents a hydrometallurgical adsorption equipment, especially a bottom feeding equipment in an absorption tower for absorbing gold from heap leaching liquid. The equipment consists of support frame, cone, roller, carbon -filter screen, discharge pipe, feed pipe and carbon-discharge valve. The feed pipe is connected directly to a carbon-discharge valve, then jointly connected to the smaller one of the conical bottoms; a discharge pipe and a carbon feeding hole which stretch to the inside of the roller was set on the roller’s cover; both the flanges of the discharge pipe inserting to the roller and the feed pipe connecting to the smaller conical bottom were covered by carbon-filter screen. With this equipment, less sediments like mud, sand and other wastes deposit in the tower, so the liquid stream can flows smoothly without any hindrance. It is also enabled to discharge the gold-loading carbon automatically no matter the carbon is wet or dry, so it demands less labor power. With a high absorption capacity, the high-efficient equipment is quite suitable for hydrometallurgy process.
Contact Department: Technical Department, Zijin Mining Group
Contact Telephone: 0597-3833996