阅读说明：本技术 一种烧结机头灰有价元素富集的装置及方法 (Device and method for enriching valuable elements in sintering machine head ash ) 是由 赵宇 王浩然 王学明 刘学庆 韩刚 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种结机头灰有价元素富集的装置及方法,属于有价元素富集技术领域,包括湿式球磨机,湿式球磨机至少包括进料口、进水口和出浆口,湿式球磨机的出浆口通入第一沉淀池；第一沉淀池依次连通第一中转池和旋流器,旋流器包括溢流口和沉砂口,其中沉砂口连接至第二沉淀池,溢流口连接至浮选装置,浮选装置为隔断式浮选装置,包括上层出料口和下层出料口,其中上层出料口依次连通至浓密机和压滤机,下层出料口依次连通至第二中转池和第三沉淀池,第二沉淀池和第三沉淀池连接有压滤机。本发明通过利用结机头灰有价元素富集的装置,对烧结机头灰中的金、银进行提纯,使提纯后的尾泥中金含量≥4克/吨、银含量≥280克/吨。(The invention discloses a device and a method for enriching valuable elements in nodulizing head ash, belonging to the technical field of valuable element enrichment, and comprising a wet ball mill, wherein the wet ball mill at least comprises a feed inlet, a water inlet and a slurry outlet, and the slurry outlet of the wet ball mill is communicated with a first sedimentation tank; first sedimentation tank communicates first transfer pond and swirler in proper order, and the swirler includes overflow mouth and sand setting mouth, and wherein the sand setting mouth is connected to the second sedimentation tank, and the overflow mouth is connected to flotation device, and flotation device is the wall formula flotation device, including upper discharge gate and lower floor's discharge gate, and wherein the upper discharge gate communicates to thickener and pressure filter in proper order, and lower floor's discharge gate communicates to second transfer pond and third sedimentation tank in proper order, and second sedimentation tank and third sedimentation tank are connected with the pressure filter. According to the invention, gold and silver in the sintering machine head ash are purified by using a device for enriching valuable elements in the sintering machine head ash, so that the content of gold in the purified tail mud is more than or equal to 4 g/ton, and the content of silver in the purified tail mud is more than or equal to 280 g/ton.)

1. A device for enriching valuable elements in sintering machine head ash comprises a wet ball mill, a cyclone, a flotation device, a thickener, a filter press, a plurality of sedimentation tanks and a plurality of transfer tanks, and is characterized in that the sedimentation tanks at least comprise a first sedimentation tank, a second sedimentation tank and a third sedimentation tank, the wet ball mill at least comprises a feed inlet, a water inlet and a slurry outlet, and the slurry outlet of the wet ball mill is communicated with the first sedimentation tank; the transfer pond includes first transfer pond and second transfer pond at least, and first sedimentation tank communicates first transfer pond and swirler in proper order, and the swirler includes overflow mouth and sand setting mouth, and wherein the sand setting mouth is connected to the second sedimentation tank, and the overflow mouth is connected to the flotation device, and the flotation device is partition type flotation device, including upper discharge gate and lower floor's discharge gate, and wherein the upper discharge gate communicates to thickener and pressure filter in proper order, and lower floor's discharge gate communicates to second transfer pond and third sedimentation tank in proper order, and second sedimentation tank and third sedimentation tank are connected with the pressure filter.

2. The apparatus of claim 1, wherein the first sedimentation tank, the second sedimentation tank and the third sedimentation tank are used in parallel.

3. A method for enriching valuable elements in sintering machine head ash is characterized by comprising the following steps:

step 1: feeding sintering machine head ash to be processed into a wet ball mill along with water for grinding, and controlling the granularity of slurry at a slurry outlet to enable the average granularity of the slurry to be below 400 meshes;

step 2: sending the slurry at the slurry outlet in the step 1 into a first sedimentation tank in a self-flowing mode, settling materials with the particle size of less than 300 meshes in the slurry to obtain iron concentrate powder to be sent, and enabling other substances in the first sedimentation tank to flow into a first transfer tank from the first sedimentation tank in an overflow water mode;

and step 3: conveying the overflow water in the step 2 from the first transfer tank to a cyclone through a submerged pump for secondary separation, and discharging the separated overflow water and sand setting outlet of the cyclone respectively, wherein slurry at the sand setting outlet is conveyed into a second sedimentation tank for sedimentation to obtain iron concentrate powder to be sent out, and the slurry at the overflow outlet is conveyed into the first transfer tank and then is subjected to cyclic operation in the steps 2 and 3;

and 4, step 4: step 2 and step 3, after the circulation operation is carried out for 2-5 times, the slurry discharged from the overflow port of the cyclone in the step 3 is sent to a flotation device, then a collecting agent and a foaming agent are added to enrich valuable elements, and the slurry on the upper layer and the slurry on the lower layer of the flotation device are separated, wherein the slurry on the upper layer is called as the upper layer material, and the slurry on the lower layer is called as the lower layer material;

and 5: feeding the upper layer material obtained in the step 4 into a thickener for concentration, and then feeding the concentrated upper layer material into a filter pressing device for dehydration treatment to obtain a valuable element enriched product to be sent;

step 6: feeding the lower layer material obtained in the step 4 into a second transfer tank, and then conveying the lower layer material to a third sedimentation tank through a submerged pump for sedimentation to obtain a fine iron powder product to be sent;

and 7: and (3) conveying the overflow water in the third sedimentation tank into a filter press through a submerged pump for dehydration to obtain defective products to be processed, and then circularly operating the steps 1-7 until the defective products account for less than 5% of the sintering machine head ash to be processed.

4. The method for enriching valuable elements in sintering machine head ash according to claim 3, characterized in that the foaming agent is diesel oil or pine oil.

5. The method for enriching valuable elements in sintering machine head ash according to claim 4, characterized in that the addition amount of the foaming agent is 20g/t-40 g/t.

6. The method for enriching valuable elements in sintering machine head ash according to claim 3, wherein the collector is xanthate or butylamine black.

7. The method for enriching valuable elements in sintering machine head ash according to claim 6, characterized in that the addition amount of the collector is 100g/t-200 g/t.

8. The method for enriching valuable elements in sintering machine head ash according to claim 3, wherein the flotation device is an isolated flotation device, six groups of communicated flotation cells are adopted to form a two-stage flotation device, wherein the first four groups of the six groups are communicated with one-stage flotation device, and the second two groups of the six groups are communicated with one-stage flotation device.

9. The method for enriching valuable elements in sintering machine head ash according to claim 8, characterized in that the volume of the flotation tank is 8m³-10m³。

Technical Field

The invention belongs to the technical field of valuable element enrichment, relates to efficient recycling of valuable elements in sintering machine head ash, and particularly relates to a device and a method for enriching valuable elements in sintering machine head ash.

Background

The average composition of compounds such as Cl, K, Na, S, Fe, Pb and the like in the sintering machine head ash accounts for 48 percent of the total weight of the sintering machine head ash, wherein the average content of K, Pb (in terms of K)₂Calculated by O and PbO) respectively reaches about 6-10 percent and 4-6 percent, the average content of TFe reaches more than 33 percent, the average content of carbon is about 6-9 percent, and the average particle size of dust is about 35-40 mu m. Because the alloy contains harmful elements of Pb, Na, K and the like in the blast furnace smelting, if the alloy is returned to participate in sintering and batching, the blast furnace smelting cost can be increased. Because the sintering machine head ash contains precious metal elements such as gold and silver, the efficiency is low by adopting a method of removing harmful elements in the sintering machine head ash by water washing, and meanwhile, the valuable element content in the washed tail mud product cannot meet the processing requirement, so that the utilization value of the tail mud is low.

Disclosure of Invention

The invention aims to solve the problems that the existing method for removing harmful elements from sintering machine head ash in the prior art is low in efficiency, the content of valuable elements does not reach the standard and the value of tail mud is low, and provides a method for enriching valuable elements from sintering machine head ash, which can improve the yield of iron concentrate powder and the content of gold and silver in the tail mud on the premise of ensuring the extraction amount of the iron concentrate powder.

Based on the above purposes, the invention provides a device and a method for enriching valuable elements in sintering machine head ash, which mainly adopt methods such as stirring, flotation, precipitation and the like to purify gold and silver in the sintering machine head ash, so that the content of gold in tail mud after purification is more than or equal to 4 g/ton and the content of silver is more than or equal to 280 g/ton. The invention discloses a device for enriching valuable elements in sintering machine head ash, which comprises a wet ball mill, a cyclone, a flotation device, a thickener, a filter press, a plurality of sedimentation tanks and a plurality of transfer tanks, wherein each sedimentation tank at least comprises a first sedimentation tank, a second sedimentation tank and a third sedimentation tank; the transfer pond includes first transfer pond and second transfer pond at least, and first sedimentation tank communicates first transfer pond and swirler in proper order, and the swirler includes overflow mouth and sand setting mouth, and wherein the sand setting mouth is connected to the second sedimentation tank, and the overflow mouth is connected to the flotation device, and the flotation device is partition type flotation device, including upper discharge gate and lower floor's discharge gate, and wherein the upper discharge gate communicates to thickener and pressure filter in proper order, and lower floor's discharge gate communicates to second transfer pond and third sedimentation tank in proper order, the second sedimentation tank with the third sedimentation tank is connected with the pressure filter.

Preferably, the first sedimentation tank, the second sedimentation tank and the third sedimentation tank are used in parallel.

The invention also discloses a method for enriching valuable elements in sintering machine head ash, which comprises the following steps:

step 1: feeding sintering machine head ash to be processed into a wet ball mill along with water for grinding, and controlling the granularity of slurry at a slurry outlet to enable the average granularity of the slurry to be below 400 meshes;

step 2: sending the slurry at the slurry outlet in the step 1 into a first sedimentation tank in a self-flowing mode, settling materials with the particle size of less than 300 meshes in the slurry to obtain iron concentrate powder to be sent, and enabling other substances in the first sedimentation tank to flow into a first transfer tank from the first sedimentation tank in an overflow water mode;

and step 3: conveying the overflow water in the step 2 from the first transfer tank to a cyclone through a submerged pump for secondary separation, and discharging the separated overflow water and sand setting outlet of the cyclone respectively, wherein slurry at the sand setting outlet is conveyed into a second sedimentation tank for sedimentation to obtain iron concentrate powder to be sent out, and the slurry at the overflow outlet is conveyed into the first transfer tank and then is subjected to cyclic operation in the steps 2 and 3;

and 4, step 4: step 2 and step 3, after the circulation operation is carried out for 2-5 times, the slurry discharged from the overflow port of the cyclone in the step 3 is sent to a flotation device, then a collecting agent and a foaming agent are added to enrich valuable elements, and the slurry on the upper layer and the slurry on the lower layer of the flotation device are separated, wherein the slurry on the upper layer is called as the upper layer material, and the slurry on the lower layer is called as the lower layer material;

and 5: feeding the upper layer material obtained in the step 4 into a thickener for concentration, and then feeding the concentrated upper layer material into a filter pressing device for dehydration treatment to obtain a valuable element enriched product to be sent;

step 6: feeding the lower layer material obtained in the step 4 into a second transfer tank, and then conveying the lower layer material to a third sedimentation tank through a submerged pump for sedimentation to obtain a fine iron powder product to be sent;

and 7: and (3) conveying the overflow water in the third sedimentation tank into a filter press through a submerged pump for dehydration to obtain defective products to be processed, and then circularly operating the steps 1-7 until the defective products account for less than 5% of the sintering machine head ash to be processed.

Preferably, the flotation device includes the flotation machine body, the flotation machine body divide into two appearance chambeies through self-control water tank, the lower part between two appearance chambeies sets up the liquid level control window, be equipped with the baffle that opens and shuts on the liquid level control window, the baffle upper end that opens and shuts is connected with the spiral pull rod, the upper end connecting axle of spiral pull rod, epaxial connecting gear is connected through gear and the motor that sets up on the flotation machine body, sets up the pump in one of them appearance chambeies, the feed inlet end of pump passes the appearance chamber that the self-control water tank deepened the opposite side, and the feed inlet end through the pump links to each other between two appearance chambeies to take lower floor's ground.

Preferably, the flotation device is an isolated flotation device, and six groups of communicated flotation cells are combined into a two-stage flotation device, wherein the first four groups of the six groups are communicated to form a first-stage flotation device, and the second two groups of the six groups are communicated to form a second-stage flotation device.

Preferably, the volume of the flotation tank is 8m³-10m³。

Preferably, the filter press is a vacuum belt filter press, and can perform continuous drying operation and improve the operation efficiency.

Preferably, the foaming agent is diesel oil or pine oil.

Preferably, the addition amount of the foaming agent is 20g/t to 40 g/t.

More preferably, the addition amount of the foaming agent is 28g/t to 36 g/t.

Preferably, the collector is xanthate or butylamine black.

Preferably, the addition amount of the collector is 100g/t-200 g/t.

More preferably, the addition amount of the collecting agent is 138g/t-162 g/t.

The invention has the beneficial effects that: 1. the invention mainly adopts methods of stirring, flotation, precipitation and the like, and purifies gold and silver in the sintering machine head ash by the combined use of all devices, the improvement of the process flow and the cyclic operation of all processes, so that the gold content in the purified tail mud is more than or equal to 4 g/ton and the silver content is more than or equal to 280 g/ton. 2. By controlling the addition amounts of the foaming agent and the collecting agent, valuable elements are enriched, and the loss of the valuable elements is reduced. 3. In the process of enriching valuable elements, the iron concentrate is recovered, and the total iron content of the recovered iron concentrate can reach 50-55%.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of the apparatus according to the present invention.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, which are illustrated in the accompanying drawings and are intended to be illustrative of the invention and not to be construed as limiting the invention.

As shown in fig. 1, a device for enriching valuable elements in sintering machine head ash comprises a wet ball mill, a cyclone, a flotation device, a thickener, a filter press, three sedimentation tanks and two transfer tanks, wherein each sedimentation tank comprises a first sedimentation tank, a second sedimentation tank and a third sedimentation tank, the wet ball mill at least comprises a feed inlet, a water inlet and a slurry outlet, and the slurry outlet of the wet ball mill is communicated with the first sedimentation tank; the transfer pond includes first transfer pond and second transfer pond, and first sedimentation tank communicates first transfer pond and swirler in proper order, and the swirler includes overflow mouth and sand setting mouth, and wherein the sand setting mouth is connected to the second sedimentation tank, and the overflow mouth is connected to the flotation device, and the flotation device is partition formula flotation device, including upper discharge gate and lower floor's discharge gate, and wherein the upper discharge gate communicates to thickener and pressure filter in proper order, and lower floor's discharge gate communicates to second transfer pond and third sedimentation tank in proper order, the second sedimentation tank with the third sedimentation tank is connected with the pressure filter.

Specifically, first sedimentation tank, second sedimentation tank and third sedimentation tank use in parallel, and flotation device includes the flotation machine body, the flotation machine body divide into two appearance chambeies through self-control water tank, the lower part between two appearance chambeies sets up the liquid level control window, be equipped with the baffle that opens and shuts on the liquid level control window, the baffle upper end that opens and shuts is connected with the spiral pull rod, the upper end connecting axle of spiral pull rod, epaxial connecting gear is connected with the motor that sets up on the flotation machine body through the gear, sets up the pump in one of them appearance chamber, the feed inlet end of pump passes the appearance chamber that self-control water tank gos deep into the opposite side, links to each other through the feed inlet end of pump between two appearance chambers to take lower floor's ground paste out through the.

Specifically, the flotation device is a partition type flotation device, and six communicated groups are adopted, and the volume of the flotation device is 8m³-10m³The flotation tanks form a two-stage flotation device, wherein the first four groups of the six groups are communicated with one-stage flotation devices, and the second two groups of the six groups are two-stage flotation devices. The filter press is a vacuum belt filter press, can perform continuous drying operation and quickens the operation efficiency.

Example 1

The device is used for enriching valuable elements and fine iron powder in sintering machine head ash, and specifically comprises the following steps:

step 1: feeding sintering machine head ash to be processed into a wet ball mill along with water for grinding, wherein the ratio of the sintering machine head ash to the water is 1:1, and controlling the granularity of slurry at a slurry outlet to ensure that the average granularity of the slurry is below 400 meshes;

step 2: sending the slurry at the slurry outlet in the step 1 into a first sedimentation tank in a self-flowing mode, settling materials with the particle size of less than 300 meshes in the slurry to obtain iron concentrate powder to be sent, and enabling other substances in the first sedimentation tank to flow into a first transfer tank from the first sedimentation tank in an overflow water mode;

and step 3: conveying the overflow water in the step 2 from the first transfer tank to a cyclone through a submerged pump for secondary separation, and discharging the separated overflow water and sand setting outlet of the cyclone respectively, wherein slurry at the sand setting outlet is conveyed into a second sedimentation tank for sedimentation to obtain iron concentrate powder to be sent out, and the slurry at the overflow outlet is conveyed into the first transfer tank and then is subjected to cyclic operation in the steps 2 and 3;

and 4, step 4: and (3) after 3 times of circulating operation, sending the slurry discharged from the overflow port of the cyclone in the step (3) into a flotation device, and then adding a collecting agent and a foaming agent to enrich valuable elements, wherein the collecting agent is xanthate, the addition amount is 146g/t, the foaming agent is pine oil, and the addition amount is 26 g/t. Separating upper layer slurry and lower layer slurry of a flotation device, wherein the upper layer slurry is called as upper layer material, and the lower layer slurry is called as lower layer material;

and 5: feeding the upper layer material obtained in the step 4 into a thickener for concentration, and then feeding the concentrated upper layer material into a filter pressing device for dehydration treatment to obtain a valuable element enriched product to be sent;

step 6: feeding the lower layer material obtained in the step 4 into a second transfer tank, and then conveying the lower layer material to a third sedimentation tank through a submerged pump for sedimentation to obtain a fine iron powder product to be sent;

and 7: and (3) delivering overflow water in the second sedimentation tank and the third sedimentation tank into a filter press through a submerged pump for dehydration to obtain defective products to be processed, and then circulating the steps 1-7 until the content of the defective products in the step 7 accounts for less than 5% of the charged sintering machine head ash to be processed.

Through tests, in the embodiment, the total iron content of the fine iron powder obtained in the steps 2, 3 and 6 is 51%, and in the valuable element enriched product obtained in the step 5, the gold content is 6 g/ton and the silver content is 285 g/ton.

Example 2

The device is used for enriching valuable elements and fine iron powder in sintering machine head ash, and specifically comprises the following steps:

step 1: feeding sintering machine head ash to be processed into a wet ball mill along with water for grinding, wherein the ratio of the sintering machine head ash to the water is 1:1.5, and controlling the granularity of slurry at a slurry outlet to ensure that the average granularity of the slurry is below 400 meshes;

step 2: sending the slurry at the slurry outlet in the step 1 into a first sedimentation tank in a self-flowing mode, settling materials with the particle size of less than 300 meshes in the slurry to obtain iron concentrate powder to be sent, and enabling other substances in the first sedimentation tank to flow into a first transfer tank from the first sedimentation tank in an overflow water mode;

and step 3: conveying the overflow water in the step 2 from the first transfer tank to a cyclone through a submerged pump for secondary separation, and discharging the separated overflow water and sand setting outlet of the cyclone respectively, wherein slurry at the sand setting outlet is conveyed into a second sedimentation tank for sedimentation to obtain iron concentrate powder to be sent out, and the slurry at the overflow outlet is conveyed into the first transfer tank and then is subjected to cyclic operation in the steps 2 and 3;

and 4, step 4: and (3) after 3 times of circulating operation, sending the slurry discharged from the overflow port of the cyclone in the step (3) into a flotation device, and then adding a collecting agent and a foaming agent to enrich valuable elements, wherein the collecting agent is butylamine black powder, the addition amount is 158g/t, the foaming agent is diesel oil, and the addition amount is 36 g/t. Separating upper layer slurry and lower layer slurry of a flotation device, wherein the upper layer slurry is called as upper layer material, and the lower layer slurry is called as lower layer material;

and 5: feeding the upper layer material obtained in the step 4 into a thickener for concentration, and then feeding the concentrated upper layer material into a filter pressing device for dehydration treatment to obtain a valuable element enriched product to be sent;

step 6: feeding the lower layer material obtained in the step 4 into a second transfer tank, and then conveying the lower layer material to a third sedimentation tank through a submerged pump for sedimentation to obtain a fine iron powder product to be sent;

and 7: and (3) delivering overflow water in the second sedimentation tank and the third sedimentation tank into a filter press through a submerged pump for dehydration to obtain defective products to be processed, and then circulating the steps 1-7 until the content of the defective products in the step 7 accounts for less than 5% of the charged sintering machine head ash to be processed.

Through tests, in the embodiment, the total iron content of the fine iron powder obtained in the steps 2, 3 and 6 is 50%, and in the valuable element enriched product obtained in the step 5, the gold content is 7 g/ton and the silver content is 280 g/ton.

Example 3

The device is used for enriching valuable elements and fine iron powder in sintering machine head ash, and specifically comprises the following steps:

step 1: feeding sintering machine head ash to be processed into a wet ball mill along with water for grinding, wherein the ratio of the sintering machine head ash to the water is 1:2, and controlling the granularity of slurry at a slurry outlet to ensure that the average granularity of the slurry is below 400 meshes;

step 2: sending the slurry at the slurry outlet in the step 1 into a first sedimentation tank in a self-flowing mode, settling materials with the particle size of less than 300 meshes in the slurry to obtain iron concentrate powder to be sent, and enabling other substances in the first sedimentation tank to flow into a first transfer tank from the first sedimentation tank in an overflow water mode;

and step 3: conveying the overflow water in the step 2 from the first transfer tank to a cyclone through a submerged pump for secondary separation, and discharging the separated overflow water and sand setting outlet of the cyclone respectively, wherein slurry at the sand setting outlet is conveyed into a second sedimentation tank for sedimentation to obtain iron concentrate powder to be sent out, and the slurry at the overflow outlet is conveyed into the first transfer tank and then is subjected to cyclic operation in the steps 2 and 3;

and 4, step 4: and 2, after 3 times of circulating operation in the step 3 and the step 3, feeding the slurry discharged from the overflow port of the cyclone in the step 3 into a flotation device, and then adding a collecting agent and a foaming agent to enrich valuable elements, wherein the collecting agent is a mixture of xanthate and butylammonium-black, the mixing ratio is 3:2, the addition amount is 153g/t, the foaming agent is a mixture of pine oil and diesel oil, and the addition amount is 30 g/t. Separating upper layer slurry and lower layer slurry of a flotation device, wherein the upper layer slurry is called as upper layer material, and the lower layer slurry is called as lower layer material;

and 5: feeding the upper layer material obtained in the step 4 into a thickener for concentration, and then feeding the concentrated upper layer material into a filter pressing device for dehydration treatment to obtain a valuable element enriched product to be sent;

step 6: feeding the lower layer material obtained in the step 4 into a second transfer tank, and then conveying the lower layer material to a third sedimentation tank through a submerged pump for sedimentation to obtain a fine iron powder product to be sent;

and 7: and (3) delivering overflow water in the second sedimentation tank and the third sedimentation tank into a filter press through a submerged pump for dehydration to obtain defective products to be processed, and then circulating the steps 1-7 until the content of the defective products in the step 7 accounts for less than 5% of the charged sintering machine head ash to be processed.

Through tests, in the embodiment, the total iron content of the fine iron powder obtained in the steps 2, 3 and 6 is 52%, and in the valuable element enriched product obtained in the step 5, the gold content is 8 g/ton and the silver content is 292 g/ton.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.