1.
bus line: no.382 → No.229, the whole journey is about 14.4km
1. Walk about 620m from Shenzhen Bao'an bus station to district 25 commercial street station
2. Take no.382, pass 12 stops, and reach Binhai Shahe East Interchange Station
3. Take No.229, pass 1 stop, and reach Binhai Shenwan interchange station
4. Walk about 540M, and reach Shenzhen Bay Park
2. Sand making machines are divided into large and small models. The prices of sand making machines vary. The starting price of small models may only cost 10000 yuan, such as roller sand making machines; However, the price of large sand making machines may reach millions, such as mobile sand making machines. The following introces several common sand making machine equipment:
< H2 > 1, HVI sand making machine
HVI impact sand making machine introces German technology, absorbs advanced proction technology at home and abroad, and develops new sand making machine proction equipment, which not only has advanced technology level, but also has a number of independent research and development technology, and integrates crushing and sand making, which is the core proction equipment of machine-made sand instry
the above different sand making machine equipment quotation is different, mainly because of the gap between the manufacturing process, sales mode and material selection of the equipment, users should choose the equipment with good quality and suitable for their own proction needs when selecting the artificial sand making machine equipment
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3.
bus line: Line 5 → line 1 → Metro Line 11 → line 2, the whole journey is about 13.1km
1. Walk about 850m from Shenzhen Bao'an bus station to Fanshen station
2. Take line 5, pass 1 station, reach Bao'an central station
3. Take Line 1, pass 2 stations, reach Qianhaiwan station
4. Take Metro Line 11, pass 2 stations, Arrive at Houhai station
5, walk about 300 meters, transfer to line 2
6, take line 2, pass 1 station, arrive at Dengliang station
7, walk about 2.0 km, and arrive at Shenzhen Bay port
4. 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 or separate gold from the ore by mineral processing. 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. First, crushing and grinding 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 According to the investigation, about 80% of the rock gold mines in China 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, in the process of continuous improvement, 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-grained 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. 2. 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 kinds according to the different materials: one is the 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.
5. The whole journey from line 1 to E19 is about 47 minutes / 11.2 km / 7 stops / transfer once. Starting from Bao'an center, take Line 1 of Luobao line via 6 stops, get off at Shenda and walk about 166 meters to high-tech center. Take E19 bus at the first stop and get off at Shenzhen Bay port
6.
bus line: Metro Line 11 → line 2 → B737, the whole journey is about 24.6km
1. Walk about 320m from Shenzhen Bao'an International Airport to the airport station
2. Take Metro line 11, pass 5 stops, then reach Houhai station
3. Walk about 300m, then transfer to line 2
4. Take line 2, pass 2 stops, then reach Haiyue station
5. Walk about 180m, Arrive at Haiyue subway station
6, take bus B737, pass 2 stops, arrive at Shenzhen Bay Port Station
7, walk about 860 meters, arrive at Shenzhen Bay port
7. Take M206
Guangming passenger station - Guangming farm - Guangming Street Office - Deyuan factory - tangjiacun intersection - Tangming intersection - Tianliao intersection - Tianliao oil station - Changzhen - yuliu village - Shiyan Lake - Shiyan water plant - Shiyan Jingbei village - Shiyan bus station - Wanlian shopping mall - Riverside Garden - Langxin village committee - substation - Shancheng Instrial Zone - Taiwan Instrial Zone - Tangtou intersection - yingrenshi intersection- Niucheng - Jinwei brewery - Xinfu market - Xin'an vocational Agency - Bao'an State Inspection Bureau - Bao'an customs building - Bao'an Party School - Bao'an Urban Management Office - Bao'an people's Hospital - Xin'an movie theater - Xin'an passenger station - Nantou checkpoint - Nanxin intersection - Nanshan court - Nanmao market - Nanshan hospital - guimiao intersection - Yilida building - Nanshan post office - Nanyou building - Nanyou Hotel - Beishi Shenzhen Bay Port
8.
bus line: Metro Line 11 → line 2 → road m507, the whole journey is about 22.6km
1. Walk about 230m from Shenzhen Bao'an International Airport to the airport station
2. Take Metro Line 11, pass 5 stops, reach Houhai station
3. Walk about 300m, transfer to line 2
4. Take line 2, pass 1 stop, reach Dengliang station
5. Walk about 560m, After arriving at Haibin intersection station, take bus no.m507, pass one stop, then arrive at Shenzhen Bay Port Station, and walk about 380 meters to Shenzhen Bay port
9. Get on at Bao'an center subway station, get off at window of the world station, then turn to Shekou subway station and get off at Shenzhen Bay Sports Center
it can also be used as a bus
