Vibration washer video

The vast majority of manganese ore in China belongs to lean ore, which must be treated by mineral processing. However, because most manganese ores are fine or fine disseminated, and there are a considerable number of high phosphorus ores, high iron ores and symbiotic (associated) beneficial metals, it is very difficult to process. The commonly used beneficiation methods of manganese ore in China are mechanical separation (including ore washing, screening, gravity separation, high intensity magnetic separation and flotation), pyrometallurgical enrichment and chemical beneficiation
1. Ore washing and screening
ore washing uses hydraulic washing or additional mechanical scrubbing to separate ore from slime. Commonly used equipment are washing screen, cylinder washing machine and trough washing machine
ore washing is often accompanied by screening, such as washing directly on the vibrating screen or sending the ore (clean ore) from the ore washing machine to the vibrating screen for screening. Screening can be used as an independent operation to separate procts with different particle sizes and grades for different purposes
2. Gravity separation
gravity separation is only used to separate manganese ores with simple structure and coarse grain size, especially for manganese oxide ores with high density. The common methods are dense medium dressing, jigging dressing and shaking table dressing
at present, the technological process of manganese oxide ore treatment in China is to crush the ore to 6-0 mm or 10-0 mm, then divide it into groups, carry out jigging in coarse grade, and send it to shaker in fine grade. Most of the equipments are Hartz type reciprocating jig and 6-s type shaker
3. High intensity magnetic separation
manganese minerals belong to weak magnetic minerals [specific magnetic coefficient X = 10] × 10-6～600 × It can be recovered in the high intensity magnetic separator with magnetic field intensity ho = 800-1600ka / M (10000-20000oe), and the grade of manganese can be increased by 4% - 10%
e to the simple operation, easy control and strong adaptability of magnetic separation, it can be used for the separation of various manganese ores, and it plays a leading role in the beneficiation of manganese ores. Various new types of high intensity magnetic machines for coarse, medium and fine particles have been developed. The most common application of manganese ore in China is medium grain high intensity magnetic separator, coarse and fine grain high intensity magnetic separators are also graally applied, and fine grain high intensity magnetic separators are still in the experimental stage< At present, the newly built and rebuilt gravity magnetic separation plants in China include Liancheng, Fujian, Longtou, Jingxi and Xialei manganese mines in Guangxi. For example, Liancheng Manganese Mine gravity magnetic separation plant mainly deals with leaching manganese oxide ore, and uses am-30 jig to treat 30-3mm washed ore, which can obtain high-quality manganese concentrate with more than 40% manganese. After manual separation, it can be used as raw material for battery manganese powder. The grade of manganese concentrate should be increased by 24% ～ 25% to 36% ～ 40% after jigging tailings and washed ore less than 3mm are grinded to less than 1m and separated by high intensity magnetic separator
5. High intensity magnetic flotation
only Zunyi Manganese ore is used. The ore is a low manganese, low phosphorus and high iron manganese ore mainly composed of manganese carbonate ore
according to the instrial test, the grinding process adopts rod mill ball mill stage grinding, and the equipment scale is 100% φ 2100mm × 3000mm wet grinding machine. Shp-2000 high intensity magnetic separator is used for high intensity magnetic separation, and CHF air flotation machine is mainly used for flotation. After many years of proction test, the performance is good, it is very suitable for Zunyi Manganese ore dressing application. The successful test of high intensity magnetic flotation process and its application in proction indicate that the deep separation of manganese ore in China has made a big step forward
6. Pyrometallurgical enrichment
pyrometallurgical enrichment of manganese ore is a kind of separation method for treating refractory poor manganese ore with high phosphorus and high iron, which is generally called manganese rich slag method. Its essence is a high temperature separation method of selective separation of manganese, phosphorus and iron by controlling the rection temperature of manganese, phosphorus and iron in blast furnace or electric furnace
pyrometallurgical enrichment has been used for nearly 40 years in China. In 1959, experiments were carried out on a 9.4m3 small blast furnace in Zijiang iron works, Shaoyang, Hunan Province, and preliminary results were obtained. Then, in 1962, Shanghai ferroalloy plant and Shijingshan iron and steel plant smelted manganese rich slag in blast furnace respectively. In 1975, the blast furnace of Manaoshan manganese mine in Hunan Province not only smelted manganese rich slag, but also recovered lead, silver and pig iron (commonly known as semi steel) from the bottom of the furnace, providing a basis for comprehensive utilization. Since the 1980s, the proction of manganese rich slag has developed rapidly, and the proction of manganese rich slag has been developed successively in Hunan, Hubei, Guangdong, Guangxi, Jiangxi, Liaoning, Jilin and other places
pyrometallurgical enrichment process is simple and stable, which can effectively separate iron and phosphorus from ore and obtain manganese rich, low iron and low phosphorus manganese rich slag, which generally contains 35% - 45% Mn, 12-38 Mn / Fe, P / Mn & lt; 002, is a kind of high-quality manganese alloy raw materials, but also the general natural rich manganese ore is difficult to achieve the above three indicators of artificial rich ore. Therefore, pyrometallurgical enrichment is a promising method for refractory mineral processing with high phosphorus, high iron and low manganese in China< There are a lot of researches on chemical separation of manganese in China, among which there are many experiments, and the most promising ones are bisulfite method, black manganese ore method and bacterial leaching method. At present, it has not been put into instrial proction

MD5 SHA1 sha256 these three kinds of essence are summary function, their length MD5 is 128 bits, SHA1 is 160 bits, sha256 is 256 bits

MD5 processes the input information in 512 bit packets, and each packet is divided into 16 32-bit sub packets. After a series of processing, the output of the algorithm is composed of four 32-bit packets, and a 128 bit hash value will be generated after cascading the four 32-bit packets

for messages less than 2 ^ 64 bits in length, SHA1 generates a 160 bit message digest. When a message is received, the message digest can be used to verify the integrity of the data

hash value is used as a unique value representing a fixed size of a large amount of data. A small change in the data can result in an unpredictable large number of changes in the hash value. The hash size of sha256 algorithm is 256 bits

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extended data

the application of MD5 algorithm:

1, consistency verification

MD5 can proce an equally unique "digital fingerprint" for any file (regardless of its size, format and quantity). If anyone makes any changes to the file, Its MD5 value, that is, the corresponding "digital fingerprint", will change

MD5 algorithm is widely used in software download station, forum database, system file security and so on

2. The typical application of digital signature

MD5 is to generate fingerprint on a message (byte string) to prevent it from being "tampered"

for example, you can write a paragraph in a file called readme.txt, generate an MD5 value for the readme.txt and record it. Then you can spread the file to others. If others modify any content in the file, you will find that (the two MD5 values are not the same) when you recalculate MD5 for the file

if there is a third-party certification authority, MD5 can also prevent the "repudiation" of the file author, which is the so-called digital signature application

Ore washing machine is a large-scale equipment used to clean ore in black and non-ferrous metallurgical mines, iron and steel, metallurgy, chemical instry and building materials. It is divided into spiral ore washing machine and cylinder ore washing machine