Common Questions About Cu-Pb-Zn Processing Technology
2019-05-23 18:26:44xinhai
Among the separation of copper, lead and zinc ores, copper ore is relatively easy to be sorted. But in many cases, copper ore is symbiotic with lead-zinc ore, and these three kinds of ores can be studied together in the discussion of mineral processing technology.
Among the separation of copper, lead and zinc ores, copper ore is relatively easy to be sorted. But in many cases, copper ore is symbiotic with lead-zinc ore, and these three kinds of ores can be studied together in the discussion of mineral processing technology.
Most copper, lead and zinc ores have complex mineral composition and structure, and there are certain difficulties in process separation. For lead-zinc ore separation, flotation process is generally selected for separation, and the supporting equipment can choose flotation machine and other equipment corresponding to the process.
Lead-zinc ore is a kind of refractory ore among many minerals. Generally speaking, lead-zinc ore is more poor ores than rich ores, and the associated components are more complex. How to separate lead-zinc ore is still a research topic.
At present, the lead-zinc minerals available for industrial use are galena and sphalerite, and also include sphalerite, white lead ore, etc., which can be divided into sulphide lead-zinc ore, oxidized lead-zinc ore and mixed lead-zinc ore according to the degree of oxidation. In this paper, the separation technology of lead - zinc ore is studied according to the oxidation degree of lead - zinc ore.
1. Sulfide lead-zinc ore separation process
Lead - zinc sulphide is easy to be selected from lead - zinc sulphide and lead - zinc oxide. Lead - zinc sulphide often contains galena, sphalerite, pyrite, chalcopyrite, the main minerals of Mars is calcite, quartz, dolomite, mica, chlorite and so on. In the selection of grinding process, according to the intercalation of useful minerals such as lead and zinc, it can be roughly divided into one grinding process and many grinding processes. A grinding process is used to deal with lead-zinc sulfide ore with coarse grain size or simple symbiosis. For lead-zinc sulfide ores with complex intercalation relationship or fine particle size, multi-stage grinding process is adopted. For lead-zinc sulfide ores, tailings regrinding or coarse concentrate regrinding are often adopted, while the medium ore regrinding process is rarely used.
During processing, lead-zinc sulfide flotation process, and is often used currently uses more flotation process including: preferential flotation process, mixed flotation process, etc., on the basis of the conventional direct flotation developed separation and flotation process, such as thickness, branch streaming processes, etc., mainly according to its different grain size and embedded to choose cloth relations,among them, such as flotation water from both ore difficult to choose the ore and the flotation process and less reagent consumption, sulphur lead-zinc deposit in flotation process has certain advantages, especially in the ore is easy floating and floating two kinds of lead and zinc content, such as flotation is a more appropriate choice.
2. Oxidized lead-zinc ore separation process
Compared with lead-zinc sulfide, lead-zinc oxide is more difficult to choose, the reason is that zinc oxide content and then to choose don't need to experience the vulcanization process, change the flotability of oxide lead-zinc mine, the oxidation of lead-zinc mine has dense disseminated extent and often more complicated disseminated relationship,easier to produce clay slurry grinding stage, make vulcanization process is relatively difficult.
Among the types of oxidized lead-zinc ore,the most valuable one is calamine. Besides, red zinc ore and silico zinc ore are also recyclable ores. Among these ores, white lead ore, lead vitriol and molybdenum lead ore are easy to be vulcanized, and sulfide agents such assodium sulfide, calcium sulfide and sodium hydrosulfide can be used for vulcanization treatment. However, arsenopyrite, chromopyrite and phosphochloropyrite are difficult to vulcanize and have poor floatability.
Generally speaking, priority flotation will be selected as the main separation process for lead and zinc oxide ores. Desliming operation should be carried out before flotation to improve flotation index and dosage of chemicals. As for the selection of agents, long-chain xanthate is a relatively common effective collector, which can also be replaced as zhongoctyl xanthate or no.25 black drug according to different test effects.But oleic acid, oxidized paraffin soap and other fatty acid collectors, their selectivity is poor, only suitable for the silicate gangue high grade lead ore.
3. Mixed lead-zinc ore separation process
Mixed lead-zinc mine refers to in the ore contains both lead and zinc oxide and zinc sulfide ores, the thinking of this type of ore sorting process is roughly will lead and zinc oxide as separate useful mineral recycling, the recycling minerals including zinc oxide, lead concentrate and zinc concentrate, usually, lead-zinc mine use mix - part or mixed flotation - selective flotation separation process, in order to lead and zinc oxide, lead concentrate and zinc concentrate, in different parts of the ore,flotation order also differ, need through beneficiation test for sure.
Above are some of the simpler lead-zinc mine separating process description, here to remind you the mine owner, this conclusion is in ideal conditions to get the process, in the process of construction of dressing plant, there are many factors that need to consider,you need to consider factors such as economic condition, operating life and then make a decision of lead-zinc mine the classification process.
There are three collector reagents in lead and zinc ore processing line: xanthate,diltiazem and black drug. Xanthate is yellow powder at room temperature, pungentodor, soluble in water. Usually, we use 1% aqueous solution in lead and zinc ore processing separation. Diltiazem is white powder, which will be light yellow when reacting with xanthate. Diltiazem is easy to dissolution in water and easy to break down in acidic medium. Diltiazem has a great collection reaction to lead and zinc ore, but it has a narrow usage for its weak collection to other ore. Black drug has a better collection than diltiazem, which is hard to dissolution than yellow sulfate. While black drug is a better collector to sulfide ore. Black drug is better in choosing, which is hard dissolution in acidic pulp. Industrial production include cresol drugs, black medicine, but ylamine black medicine and amine black drug and naphthenic black medicine. In weakly alkaline pulp collector capacity is stronger to gelane.
In the production, the lead and zinc ore flotation method is the most commonly used method for extracting lead and zinc. According to the difference between the lead and zinc in lead and zinc ore, the flotation process can be adopted preferentially.The lead for good floatability will firstly surface and then the zinc with low floatability will be separated with the gangue. In view of the nature of the lead and zinc mine, the internal structure of the process will be determined. This requires a detailed expression of number of mine classification and that of roughing, concentration and scavenging of each cycle. The number of the concentration and scavenging is related to the nature of the lead and zinc ore and the product quality. The treatment on the intermediate products is determined by content and the composition of the lead-zinc ore body as well as the chemical content.The intermediate product is usually returned to the previous operation or to the appropriate place of the flotation process. In the practical production, the intermediate product is generally returned to the operation in which the composition and the flotability of the material to be processed is similar with the intermediate product. If the intermediate product with more living body needs regrinding, it can be regrind alone or be returned to the first stage of grinding. If the nature of the intermediate product is special, it can be floated alone or can be treated alone by the chemical method.
For the flotation cells in the process of the lead zinc ore, it must possess such advantages as large production capacity, low energy consumption, wear-resistance, simple structure, easy maintenance and low costs except the reliable work. By the flotation practice experience and the study of the fluid dynamics within the flotation cells, the flotation cells in the lead zinc mineral processing equipment must have four basic requirements as followings:
Having fine inflatable performance;
Having sufficient stirring speed;
Can make bubbles have a proper distance to form a relatively stable bubble area;
Can work continuously and easy to adjust.
Copper is one of the earliest discovered and used metals, and in the bronze age, copper is widely used as a variety of sculpture and weapons, while in modern society, copper is widely used in electrical, electronic, machinery manufacturing and other industries. The use has very wide range. At present, China's copper ore mining grade in 0.5~0.4%,and ore structure is complex, distribution of disseminated uneven, symbiotic,associated with a variety of useful and harmful components, so the selection and smelting conditions are complex. According to different types of copper ore, the process of copper mine used in industrial production is not the same.
The configuration and process design of copper dressing plant is similar to others, but due to its characteristics,there is difference in the choosing of equipment and process. Mineral processing process includes exploration and mining, transportation, crushing, grinding operation, selection process, filter recovery. Because the specificity, there will add or reduce several of them, for example, if the content of mineral mud is high there will be washing process. The process design of a copper dressing plant should according to the copper nature and the selection of mineral processing equipment is also important which is directly related to whether to get the best separation effect.
1. Bulgarian 1000tpd lead-zinc tailings dry stacking project
2. Mexico 1500tpd copper-lead-zinc-gold-silverpoly-metallic processing project
3. Europe 300tpd Lead-Zinc Ore Dressing Project
