50t miner
at present, the computing power of bitcoin in the whole network has reached 2.36 billion hash collisions per second, which is equivalent to the number of water droplets in more than 200000 50 meter long standard swimming pools. But even with such a large amount of computing power, it will take about 10 minutes to hit a hash value that meets the requirements
in 2012, bitcoin's output was halved for the first time, and in July 2016, bitcoin's output was halved for the second time. At present, 12.5 bitcoins are awarded for recording one page of account book. The next halving will take place around 2020, and the total number of bitcoins will not increase by 2040, with a total of 21 million. In other words, the difficulty of digging bitcoin is increasing, while the time required is increasing
it needs to be refined.
the content of gold in the ore is very low. In order to extract gold, it is necessary to crush and grind the ore and preconcentrate it by mineral processing or separate gold from the ore. Gravity separation and flotation are widely used in gold beneficiation. Gravity separation plays a very important role in placer gold proction. Flotation is widely used in rock gold mines. At present, about 80% of rock gold mines in China adopt this method for gold beneficiation. The level of beneficiation technology and equipment has been greatly improved< According to the investigation, jaw crushers are mostly used in China's gold concentrators for coarse crushing, standard cone crushers for medium crushing, and short head cone crushers and counter roller crushers for fine crushing. Medium and small gold concentrators mostly adopt two-stage one closed circuit crushing process, while large gold concentrators adopt three-stage one closed circuit crushing process
in order to improve the proction capacity of mineral processing and tap the potential of equipment, the crushing process has been reformed to improve the utilization coefficient of the grinding machine. The main measures adopted are more crushing and less grinding to rece the particle size of the incoming grinding stone< (2) gravity separation
gravity separation is widely used in rock gold mines. It is mostly used as an auxiliary process to recover coarse gold in grinding circuit, which creates favorable conditions for flotation and cyanidation process, improves beneficiation indexes, increases the total recovery of gold, and plays a positive role in increasing output and recing cost. More than 10 gold concentrators in Shandong Province have adopted the gravity separation process. The average total recovery rate can be increased by 2% ~ 3%. The economic benefit of the enterprise is good. According to incomplete statistics, the annual profit can be several million yuan. Henan, Hunan, Inner Mongolia and other provinces (regions) have also achieved good results, the main equipment used are chute, shaker, jig and short cone cyclone. From the view of most gold mines in China, the flotation gravity combined process (gravity separation for flotation tailings) is suitable for use. In the future, it is necessary to vigorously promote the stage grinding stage separation process and advocate the principle of early recovery< (3) flotation
according to the survey, about 80% of China's rock gold mines adopt flotation method for gold separation, and the concentrate proced is mostly sent to non-ferrous smelters for treatment. Due to the increasing development of cyanidation and in order to improve the economic benefit and rece the loss of concentrate transportation, the proct structure has changed greatly in recent years. Most of them adopt on-site treatment (of course, because of the contradiction between beneficiation and metallurgy and pricing problems, the mine is forced to treat on-site), which promotes the great development of flotation technology and occupies an important position in gold proction. There are usually two kinds of flotation processes: preferential flotation and mixed flotation. In recent years, new progress has been made in technological process improvement and reagent addition system, and flotation recovery has been improved significantly. According to the investigation results of flotation process indexes of more than 40 gold concentrators in China, the flotation recovery rate of sulfide ore is 90%, and a few of them are as high as 95% ~ 97%; The recovery of oxide ore is about 75%; Some of them are 80% - 85%. In recent years, there are a lot of innovation and scientific research achievements in flotation process, and the effect is obvious. Stage grinding flotation process and gravity flotation combined process are the main trend of flotation technology development in China. For example, Xiangxi Gold Mine adopts gravity flotation combined process to grind ore in stages and separate ore in stages, which can obtain better indexes and increase recovery by more than 6%; Jiaojia gold mine, Wulong gold mine, Wenyu Gold Mine and Dongchuang gold mine have also achieved certain results. Another example is Xincheng Gold Mine, where the original flowsheet is direct flotation of raw ore. e to the high mud content of the ore itself and the insufficient cemented filling strength of mining tailings, some mud and sand are brought in, the beneficiation indexes continuously decrease. Through investigation and test, the process flow of mud sand separation is adopted, the recovery rate is increased from 93.05% to 95.01%, the concentrate grade is increased from 135g / T to 140g / T, and the proction is stable. Because the grade of raw ore in Jinchangyu Gold Mine is decreasing year by year, the flotation index is reced. Through the cooperation with Shenyang Gold Institute and other units, the branch flotation process is adopted, and the flotation index and concentrate grade are improved. This scientific research achievement (passed the technical appraisal in January 1988) provides new enlightenment for the reform of flotation process. Of course, like other methods, flotation method is not omnipotent, and it is impossible to be effective for all gold bearing ores. The ore properties should be mainly considered. When selecting the technological process, it is necessary to carry out various demonstrations and tests
in recent years, in order to improve the separation effect, many improvements and researches have been made on the reagent addition system and mixed medication, and new progress has been made in the automatic control of dosing< (4) chemical separation hydrometallurgical gold extraction process
1. Mixed mercury gold extraction process
is an ancient gold extraction process, which is simple, economical and suitable for the recovery of coarse monomer gold. This method is still used in many gold mines in China. With the development of gold proction and the progress of science and technology, the process of extracting gold by mixed mercury method has been improved and perfected. Due to the increasingly stringent requirements of environmental protection, some mines have cancelled the mercury mixing operation and replaced it by gravity separation, flotation and cyanidation
in the proction of gold, the process of extracting gold by mixed mercury method still plays an important role, and has been applied at home and abroad. At present, this technology has been applied in many gold mines, such as Zhangjiakou, Hebei, Ergou, Liaoning, Jiapigou, Jilin and Yinan, Shandong. Liaoning Ergou gold mine was originally a single flotation process. According to the ore properties, it was changed into a combined process of mixed mercury and flotation. The total recovery was increased by 7.81% (the recovery of mixed mercury was 64.6%), the tailings grade was reced from 0.74g/t to 0.32g/t, and the annual benefit was 1.58 million yuan. The key to the process of gold extraction by mixed mercury method is how to take protective measures to eliminate mercury pollution< Cyanidation is the main method of extracting gold from ore or concentrate. The process of gold extraction by cyanidation includes: cyanidation leaching, washing and filtration of leaching pulp, extraction of gold from cyanidation solution or cyanidation pulp and smelting of finished procts. There are two kinds of gold extraction processes in the existing cyanidation plants of gold mines in China. One is the so-called conventional cyanidation process (CCD method and CCF method) in which the thickener is used for continuous countercurrent washing and zinc powder is used to replace the precipitation to recover gold. The other is that there is no need for filtration and washing, CIP process and CIL process were used to recover gold from cyanide pulp directly by activated carbon adsorption
the conventional cyanidation process can be divided into two types according to different materials: one is cyanidation plant which processes flotation gold concentrate or mixed mercury and gravity tailings. Most of them are large state-owned mines. For example, Jinchangyu in Hebei Province; Wulong, Liaoning, Yangzhaiyu, Henan; Zhaoyuan, Xincheng, Jiaojia and Sanshan gold mines in Shandong Province. The other is a gold extraction plant which processes argillaceous oxide ore and uses whole slime stirring cyanidation. Such as Jilin trench; Tuanjiegou, Heilongjiang Province; Xinqiao gold and silver mine in Anhui Province
the cyanidation process has been used in China since 1930s. During 1936-1938, Jinguashi gold mine in Taiwan used cyanidation zinc powder replacement process to extract gold with an annual output of 150000 taels< After entering the 1960s, in order to adapt to the development of national economy and vigorously develop the proction of mineral gold, the intermittent mechanical agitation cyanidation process and continuous agitation cyanidation process were successively adopted in some mines to replace the percolation cyanidation process. In 1967, the continuous mechanical agitation cyanidation process was first realized in Lingshan and Linglong gold concentrators of Zhaoyuan gold mine, Shandong Province. The cyanidation rate increased from 70% to 93.23%. Since then, the continuous mechanical agitation cyanidation process has been rapidly promoted in major gold mines in China. The cyanidation plants of Changyu gold mine in 1970 and Wulong gold mine in 1977 were successively built and put into operation. Since then, a number of mechanical stirring cyanidation plants have been built and put into operation in China. The cyanidation process has entered a new stage of development
with the continuous development of gold proction and the rapid development of gold resources, a large number of argillaceous high gold bearing oxide ores have been increased since the 1980s. The research on the whole slime cyanidation agitation leaching of this kind of ores has been carried out, and a cyanidation plant with a daily treatment capacity of 500 tons has been built in Tuanjiegou gold mine, Heilongjiang Province, which was put into proction in 1983. Since then, the whole slime cyanidation process has been widely used in Henan, Jilin, Hebei, Shaanxi, Inner Mongolia and other places. At the same time, in order to solve the difficulty of solid-liquid separation in dense filtration of argillaceous oxidized ore, Changchun Gold Research Institute began to use the non filtration carbon slurry process to extract gold from the ore of Tuanjiegou gold mine in November 1979. The experimental research lasted for two years and was successful. On this basis, in August 1984, China's first gold extraction plant with 50 tons of ore per day was designed and built in Linghu gold mine, Henan Province. It is a great step forward in the cyanidation process of gold extraction in China. The technology of extracting gold by carbon slurry has become one of the most important methods to treat argillaceous oxidized ore in rock gold mines. Since then, gold extraction plants have been established in Jilin, Henan, Inner Mongolia, Shaanxi and other places. At the end of 1984, the gold Bureau of the Ministry of metallurgical instry, in order to promote the application of carbon slurry process in China, transplanted and digested foreign advanced technology and equipment, cooperated with David McKee company of the United States, and established a 250t / D (xitongyu) and 450t / D (Zhangjiakou) carbon leaching gold extraction plant in xitongyu gold mine of Shaanxi Province and Zhangjiakou gold mine of Hebei Province, respectively. According to the investigation, the recovery rate of Zhangjiakou gold mine is 93.54% (the recovery rate of carbon slurry was 90.25% in 1988)
relying on science and technology, the experimental research of technological innovation has greatly improved the level of gold proction technology in China. For example, Jinchangyu Gold Mine successfully used zinc powder instead of zinc wire to replace gold mud, the replacement rate reached 99.89%, the gold grade of gold mud was significantly improved, the zinc consumption was reced from 2.2kg/t to 0.6kg/t, and the proction cost was greatly reced. Then, the application in Zhaoyuan, Jiaojia, Xincheng, Wulong and other mines also achieved obvious results. The heap leaching process of low-grade oxidized ore has been applied in Henan, Hebei, Liaoning, Yunnan, Hubei, Inner Mongolia, Heilongjiang, Jilin, Shaanxi and other provinces after the successful test in Dandong Hushan gold mine. The economic effect is obvious, which opens a way for the development and utilization of low-grade oxidized ore. According to incomplete statistics, the annual output of gold proced by heap leaching in China is more than 10000 taels (only 13000 taels of gold proced by heap leaching in Henan Province), but compared with developed countries, the scale of heap leaching in China is smaller, generally 1 × 103~3 × 103t / heap, 10000 t / heap is less, and there is a big gap in technology. In 1988, Shuangwang gold mine in Tai County, Shaanxi province put into operation, and achieved gratifying results (ore grade 1.5g/t)
the introction and digestion of foreign advanced technology and equipment (such as high-efficiency thickener in the United States, double screw stirring leaching tank, Mars pump in Japan, belt filter, etc.) has further improved the equipment level and technical level of China's gold proction, and promoted the development of China's gold proction equipment in the direction of high efficiency, energy saving, large-scale and automation. In recent years, new progress has been made in the research of new technologies such as thiourea extraction, thiosulfate extraction, preoxidation bacterial leaching, pressure catalytic leaching and resin adsorption. In 1979, Changchun Gold Research Institute carried out thiourea extraction
I am not the God of the coin circle, not a professional. I share my personal experience. I hope I can give some guidance to the new people, and I can achieve my goal
after I graated from University for 12 years, I began to work in the financial instry, from the initial bank counter to the job hopping out as a fund private placement manager. During this period, I was once cut leeks by P2P, and I also experienced the despair of leverage explosion in the stock market. Along the way, I paid a lot of tuition fees and accumulated a lot of failure experience
the affiliation with digital currency can be traced back to June last year, because a former boss of a fund company told him about the platform of the Institute of mines and gold. To tell you the truth, at first, I was against the mining instry. I thought that 100% of the capital and pig killing plates were treated with the mentality of the melon eating masses waiting to see other people's jokes
however, the sharp rise of bitcoin in the next few months and the profits of friends who buy mining machines in one month have changed my mind greatly, and I am willing to devote myself to research and inspect the platform
after nearly a month and a half of on-the-spot investigation on the "undercover" mode of the Institute of mining and gold, I decided to try my best. Just as fil was about to go online, I bought 50 tons of fil power. I believe we all know the development trend of fil in the next few months. Maybe because of my good luck, I caught up with the bull market of fil. In addition, I chose the right platform and increased the principal to 50W. After that, I chose to invest the profits again
facts have proved that the energy of re investment is really huge. In just over six months, the assets in my account already have 400 + fil calculation power, which is more than 9 times of the current price. The daily income of digging money is 2W +
of course, the painful experience once told me that we should not be carried away by greed. As a result, I took the profit from fil to diversify investment. The Chia coin miner, which was launched immediately recently, is one of the important choices
to sum up, the experience of assets increasing 9 times in more than six months
1, choice is always more important than effort. Choosing the right platform will definitely get twice the result with half the effort
2. Of course, the fil calculation power of the mining and gold institute does not need me to issue the pledge currency. I can redeem the currency with linear release cycle in advance with one click, so that I have flexible capital for re investment
3, investment should be decisive, recognize the opportunity and don't hesitate. Mining is like this. The earlier you enter the site, the smaller the risk of taking over the offer is
4, and always maintain the awe of risk. Don't be carried away by a temporary success. It's very important to diversify investment. Based on this, I never speculate because the risk is uncontrollable
finally, I hope that the bull market of digital currency can last longer, so that it will be closer to my goal of wealth freedom
Every day, when you go online to receive a task, a task about the power of the stars, you can get a stone, and then go online for 20 minutes, you can take the stone to hand in the task, and you can be rewarded. You can only do it five times a day
at present, the only way to get stars is through daily landing and check-in. Sign in the middle of the game interface to start the sign of the star, online 20 minutes (not every day)
"Adventure Island Online" is developed by the Korean WIZET and NEXON developed a 2D horizontal scroll online game, officially launched in Chinese mainland in July 24, 2004, and is operated by Shanda. p>
the story is set in a "chaotic period" when the "dark forces" constantly invade the world. The warriors form an alliance and fight against the "dark forces" again. The game has five professional systems and seven game camps
in 2009 and 2010, the game won the top ten most popular leisure online game awards of "China game instry annual meeting" for two consecutive years
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< H2 >< H2 > extended data:
game system
task system
1. General task: tasks that can be taken by all professions when they reach a certain level
2. Enrance task: commonly known as jump task, which is unique to Adventure Island, will transfer the player to a specific map. The land in the map may be standing in one grid, like a stake, Or it's a trap that can cause a slip
because the player's movement speed and jumping power in the enrance mission map will drop to the normal value, and as long as the player falls, most of them will come up from the origin again. Therefore, the task is more difficult and requires more patience, so it is called enrance task
3. Occupation task: only specific occupation can take it
Team formation tasks: ordinary team formation tasks are divided into plot type, competitive type and other types. The plot type has a certain story background or is related to the plot of the adventure Island (such as: Irene's poisonous fog forest). The competitive type is a team task for players to fight with each other. The non pK (such as: Monster carnival) other types of team tasks can not be classified. The English village team task is a unique team task in China (including Taiwan)after the great change, all the team task preparation maps enter through the dimensional realm. If it is not a team task that dimension can enter, the entry will indicate the location and start NPC. There is no limit to the highest level of the plot type team task
5. Navigation : it's actually a single . Players can load goods on their own boat and sail. In the navigation level, players will encounter waves of monsters and obstacles. To open a new level, it needs the previous level to reach a certain number of passes. Navigation revenue is the profit between purchase cost and revenue after customs clearance. The gold can be exchanged. Players can also strengthen boats