WO2021037243A1 - 一种低碱先浮后磁的含磁黄铁矿选矿方法 - Google Patents
一种低碱先浮后磁的含磁黄铁矿选矿方法 Download PDFInfo
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- WO2021037243A1 WO2021037243A1 PCT/CN2020/112257 CN2020112257W WO2021037243A1 WO 2021037243 A1 WO2021037243 A1 WO 2021037243A1 CN 2020112257 W CN2020112257 W CN 2020112257W WO 2021037243 A1 WO2021037243 A1 WO 2021037243A1
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- flotation
- copper
- sulfur
- pyrrhotite
- ore
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/08—Subsequent treatment of concentrated product
- B03D1/087—Subsequent treatment of concentrated product of the sediment, e.g. regrinding
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Definitions
- the invention relates to the fields of chemical industry and metallurgy, in particular to the beneficiation process of mixed ore of chalcopyrite, pyrite, magnetite and pyrrhotite.
- the Xinqiao copper-pyrite deposit is a very important deposit in the Tongling ore concentration area in the middle and lower reaches of the Yangtze River in my country.
- This type of deposit has rich sulfur reserves, mainly containing chalcopyrite, pyrite, magnetite, and magnetite. Ores such as pyrite, and a small amount of ores such as galena and sphalerite.
- Xinqiao Mine has a mining and dressing production capacity of 1.5 million tons per year, including 600,000 tons of underground mines and 900,000 tons of open-pit mines. It has now become an annual output of 1.4 million tons of sulfur concentrates, 40,000 tons of copper concentrates and 100,000 tons of iron ore. Tons of large-scale polymetallic mines. After years of production practice, the process flow is smooth and the production index is good. However, there are also some problems. First, affected by market conditions, it is difficult to sell low-sulfur sulfur concentrates with a sulfur content of about 40%, and the price is low. The second is that the sulfur content of iron concentrates is seriously exceeding the standard. Generally, the sulfur content of iron concentrates is more than 3-4%, and sometimes even can reach more than 10%, and the iron recovery rate is not high.
- the pyrrhotite-containing ore is subjected to the copper flotation roughing process.
- the collector used is: ethyl thiourethane Z-200, the dosage is 20 ⁇ 23g/t and ethyl xanthate B03, the dosage is: 42 ⁇ 48g /t; the foaming agent is No.
- the obtained copper flotation concentrate is subjected to a secondary copper flotation process; the tailings obtained from the copper flotation roughing process are processed
- the collector used in the copper flotation sweeping process is: ethyl thiourethane Z-200, the dosage is 5-9g/t and ethyl xanthate B03, the dosage is: 10-20g/t; the foaming agent is No. 2
- the oil is: 6-8g/t; the tailings obtained by the copper flotation sweeping process are subjected to sulfur roughing flotation process using sulfuric acid 5500-6500g/t, ethyl xanthate 95-105g/t, No.
- the flotation time is 12-13 minutes; the tailings obtained by the rough sulfur flotation process are subjected to sulfur flotation sweeping process using sulfuric acid 1800-2000g/t, ethyl xanthate 30-40g/ t, No. 2 oil 6-8g/t, flotation time 4-5 minutes; the tailings obtained by the sulfur flotation sweeping process are subjected to a magnetic separation process to obtain iron concentrate.
- the foaming agent used in the copper flotation roughing process of the pyrrhotite is No. 2 oil.
- the amount is 21g/t.
- the secondary copper flotation beneficiation process is divided into the first copper flotation beneficiation process and the second copper flotation beneficiation process, and the second copper flotation and beneficiation process also obtains the first middle ore , The middle ore was returned to the first copper flotation process.
- a medium ore is also obtained in the first copper flotation beneficiation process, and the second medium ore is returned to the copper flotation roughing process.
- the third medium ore obtained by the copper flotation sweeping process is returned to the copper flotation roughing process.
- the fourth medium ore obtained by the sulfur flotation sweeping process is returned to the sulfur flotation roughing process.
- the copper concentrate is obtained after the secondary copper flotation process.
- the sulfur concentrate is obtained after the rough sulfur flotation process.
- equipment with a combination of multiple force fields is used on the equipment, such as a flotation machine and a magnetic separator, which are important support points for realizing the method, and the new beneficiation equipment brings a good separation effect.
- low alkali is adopted, which reduces the consumption of lime during the formation process, improves the subsequent dehydration process, reduces production costs, and increases economic benefits.
- this method can more comprehensively recover the valuable metals in the copper-iron ore, including the metals copper, iron, sulfur, pyrrhotite, etc., and has good economic benefits.
- Fig. 1 is a process flow diagram of the beneficiation method of pyrrhotite-containing ore of the present invention.
- Fig. 1 is a process flow diagram of the beneficiation method of pyrrhotite-containing ore of the present invention. As shown in Figure 1, the process includes the following steps:
- the pyrrhotite-containing ore is subjected to a copper flotation roughing process, and the obtained copper flotation concentrate is subjected to a secondary copper flotation beneficiation process.
- raw iron ore can be crushed and ground.
- a ball mill to grind the ore, add lime before the grinding starts, and finally make the PH value of 9 ⁇ 0.5, and the particle size of the product should be controlled by overflow.
- the particle size -0.074mm accounts for 75%.
- the overflow product has undergone the first rough selection of copper flotation, and the rough selection of copper flotation can use suitable collectors and foaming agents.
- the preferably used collector is Z-200+B03 (the B03 is ethyl xanthate, the unit g/t is gram/ton), and the dosage is: (15-25)+(40-60)g/t;
- the preferred foaming agent is No. 2 oil with a dosage of 15-25g/t.
- the rough selection time can be controlled at 5-10 minutes, for example, 7 minutes.
- the product copper flotation roughing concentrate and copper flotation roughing tailings are obtained, and the pH value of the copper flotation roughing concentrate is controlled at 11-12 for the first copper flotation beneficiation.
- the concentration time is between 5 and 15 minutes, such as 10 minutes, to obtain the product copper flotation concentrate and the second middle ore.
- the obtained copper flotation concentrate can be selected for the second copper flotation.
- the PH value is controlled at 11-12
- the concentration time is about 10 minutes
- the products obtained are copper concentrate and the first middle ore.
- the product obtained from the first copper flotation concentration, the second medium ore is returned to the copper flotation rough selection, and the copper flotation is performed again, and the product obtained from the second copper flotation concentrate is returned to the first copper flotation selection.
- Copper flotation beneficiation is performed again in the middle, and the copper flotation roughing tailings produced by the copper flotation roughing will be subjected to copper flotation sweeping operations.
- the tailings obtained by the copper flotation roughing process are subjected to a copper flotation sweeping process.
- the process of copper flotation and sweeping in this step also uses suitable collectors and foaming agents.
- the dosage is: (5-10)+(20-30)g/t; the foaming agent is No. 2 oil, the dosage is: 5-10g/ t.
- the sweeping time is preferably 2-5 minutes, for example, 3 minutes. Copper flotation scavenging will obtain the third medium ore and copper flotation scavenging tailings. The third medium ore will return to copper flotation roughing and flotation again, and the obtained copper flotation scavenging tailings will be subjected to magnetic separation operations .
- the tailings obtained by the copper flotation sweeping process are subjected to a sulfur roughing flotation process.
- sulfur flotation is carried out.
- the reagents used are preferably sulfuric acid 5000-7000g/t, ethyl xanthate 60-120g/t, No. 2 oil 15-25g/t, and the flotation time is generally 10-15 minutes, preferably 13 minutes, to obtain the product sulfur Rough flotation of sulphur concentrate and rough flotation of sulphur flotation tailings.
- the crude sulfur flotation tailings will be subjected to a sulfur flotation sweep.
- the sulfur flotation sweep preferably uses sulfuric acid 1000-2000 g/t, ethyl xanthate 30-50 g/t, and No. 2 oil 5-10 g/t. t, the flotation time can be about 5 minutes.
- Sulfur flotation scavenging will obtain the foam product as the fourth medium ore and sulfur flotation scavenging tailings, and the foam product of the fourth medium ore will be returned to the sulfur flotation roughing and flotation again.
- the sulphur flotation sweeping tailings will be subjected to magnetic separation roughing.
- the magnetic separation roughing controls appropriate magnetic separation parameters.
- the magnetic field strength is set to 111.4KA/M
- the product obtained from the magnetic separation concentrate is iron concentrate. Mine and tailings.
- the raw material is a certain copper-sulfur iron in Anhui, in which the raw ore contains 0.365% Cu, S34.32%, and Fe40.15%.
- the mineral composition of the ore is relatively complex.
- the metal minerals include chalcopyrite, magnetite, and red. Iron ore, pyrrhotite, pyrite, galena, siderite.
- the non-metallic minerals are mainly carbonate minerals. The ore is dominated by massive structure and disseminated structure. The mineral intercalation is more complicated. The magnetite cracks are divided into many particles by calcite, and the intercalation particle size is mainly fine particles.
- the content of copper minerals is sparse and relatively dispersed. Pyrite has porphyritic metamorphic crystals, unequal-grained metamorphic structure, and the grain size is extremely unequal-grained. The main reason is that the particle size of the inlay is fine, and the calcite mesh veins are cut through, which makes it more difficult for the monomer to dissociate.
- the overflow product is first subjected to the first copper flotation roughing (collecting agent Z-200+B03, dosage: 21+45g/t; foaming agent No. 2 oil: 21g/t),
- the copper flotation concentrate is subjected to a copper flotation selection one (pH value is controlled so that the pH value is flotation between 11-12), and the copper flotation concentrate and the second middle ore are obtained, and the second middle ore returns in order
- the copper flotation concentrate is again subjected to a second copper flotation selection (pH value is controlled so that the pH value is flotation between 11-12), and the final copper concentrate and the first middle ore are obtained.
- the No. 1 mine returns to the copper selection 1 in order.
- Copper flotation roughing tailings are subjected to copper flotation scavenging operations (collector use Z-200+B03, dosage: 7+15g/t; foaming agent for No. 2 oil: 7g/t), flotation
- the concentrate is returned to the roughing operation of copper flotation, and the flotation tailings is subjected to the next magnetic separation operation.
- Copper scavenging tailings carry out one roughing and one sweeping operation of sulfur concentrate.
- the specific operation is as follows. Copper scavenging tailings are subjected to sulfur roughing operations (sulfuric acid 6000g/t, ethyl xanthate 100g/t, No. 2 oil 21g/t, flotation time 13 minutes) to obtain sulfur concentrate products.
- the flotation tailings of the sulfur roughing operation are subjected to sulfur sweeping operation (sulfuric acid 2000g/t, ethyl xanthate 35g/t, No. 2 oil 7g/t, flotation time 5 minutes), and the foam product is returned to the sulfur roughing operation , Flotation tailings enter the subsequent magnetic separation operation.
- the magnetic separation operation is carried out, and the operation adopts a magnetic separation rough selection.
- the specific operation is as follows, iron ore magnetic separation roughing operation (magnetic field strength is 111.4KA/M), the magnetic separation concentrate product is iron concentrate, and the tailings are the final tailings.
- the valuable metals in the copper-iron ore including the metals copper, iron, sulfur, pyrrhotite, etc., are recovered more comprehensively, which reduces production costs and increases economic benefits.
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Abstract
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Claims (8)
- 一种含磁黄铁矿的选矿方法,其特征在于:包括以下步骤:将含磁黄铁矿石进行铜浮选粗选工艺,使用捕收剂为:乙基硫氨酯Z-200,用量为20~23g/t和乙基黄药B03,用量为:42~48g/t;起泡剂为2号油为:20~22g/t,将得到的铜浮选精矿进行二次铜浮选精选工艺;将所述铜浮选粗选T艺得到的尾矿进行铜浮选扫选T艺使用捕收剂为:乙基硫氨酯Z-200,用量为5~9g/t和乙基黄药B03,用量为:10~20g/t;起泡剂为2号油为:6~8g/t;将所述铜浮选扫选工艺得到的尾矿进行硫粗选浮选工艺使用硫酸5500~6500g/t,乙基黄药95~105g/t,2号油20~22g/t,浮选时间12~13分钟;将所述硫粗选浮选工艺得到的尾矿进行硫浮选扫选工艺使用硫酸1800~2000g/t,乙基黄药30~40g/t,2号油6~8g/t,浮选时间4~5分钟;将硫浮选扫选工艺得到的尾矿进行磁选工艺,得到铁精矿。
- 根据权利要求1所述的含磁黄铁矿的选矿方法,其特征在于:所述含磁黄铁矿石进行铜浮选粗选工艺使用的起泡剂为2号油用量为:21g/t。
- 根据权利要求1所述的含磁黄铁矿的选矿方法,其特征在于:所述二次铜浮选精选工艺分为第一次铜浮选精选工艺和第二次铜浮选精选工艺,所述第二次铜浮选精选工艺还得到第一中矿,所述第一中矿被返回到第一次铜浮选精选工艺中。
- 根据权利要求3所述的含磁黄铁矿的选矿方法,其特征在于:所述第一次铜浮选精选T艺还得到第二中矿,所述第二中矿被返回到铜浮选粗选T艺中。
- 根据权利要求1所述的含磁黄铁矿的选矿方法,其特征在于:所述铜浮选扫选工艺得到的第三中矿返回到铜浮选粗选工艺中。
- 根据权利要求1所述的含磁黄铁矿的选矿方法,其特征在于:所述硫浮选扫选工艺得到的第四中矿返回到硫浮选粗选工艺中。
- 根据权利要求1所述的含磁黄铁矿的选矿方法,其特征在于:所述二次铜浮选精选工艺后得到铜精矿。
- 根据权利要求1所述的含磁黄铁矿的选矿方法,其特征在于:所述硫浮选粗选工艺后得到硫精矿。
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CN113369011A (zh) * | 2021-05-31 | 2021-09-10 | 铜陵有色金属集团股份有限公司 | 一种从选铜尾矿中梯度回收硫铁矿物的方法 |
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