阅读说明：本技术 一种从锡酸钠溶液压滤固体物中冶炼粗锡的工艺 (Process for smelting crude tin from sodium stannate solution filter-pressed solid ) 是由 赵尧育 宋宣都 陈虎龙 于 2021-09-18 设计创作，主要内容包括：本发明公开了一种从锡酸钠溶液压滤固体物中冶炼粗锡的工艺,涉及废旧蓄电池回收处理领域,通过将锡酸钠溶液压滤固体、石英砂以及煤粉加入至粗锡提取设备中熔融后反应,杂质生成浮渣漂浮在金属熔融液液面之上,之后将金属熔融液从下方排出,之后进行冷却,有效的将金属熔融液与浮渣分离,因此能够将杂质充分去除,制备得到的粗锡品位高,分离效果好,回收效果好,降低资源浪费,避免环境污染；该粗锡提取设备实现热量充分回收,降低能量损耗,该设备冶炼粗锡过程能耗低,制备得到的粗锡品位高。(The invention discloses a process for smelting crude tin from a sodium stannate solution filter-pressed solid, which relates to the field of waste storage battery recovery treatment, wherein the sodium stannate solution filter-pressed solid, quartz sand and coal powder are added into crude tin extraction equipment for melting and then reacting, scum generated by impurities floats on the liquid level of molten metal, the molten metal is discharged from the lower part and then cooled, and the molten metal and the scum are effectively separated, so that the impurities can be fully removed, the prepared crude tin has high grade, good separation effect and good recovery effect, the resource waste is reduced, and the environmental pollution is avoided; the crude tin extraction equipment realizes the sufficient recovery of heat, reduces energy loss, has low energy consumption in the crude tin smelting process, and obtains high grade crude tin.)

1. A process for smelting crude tin from a sodium stannate solution filter-pressed solid is characterized by comprising the following steps:

the method comprises the following steps: adding the sodium stannate solution filter-pressing solid, quartz sand and coal powder into a feeding hopper (103) of a crude tin extraction device, releasing heat by a heating net (122), and heating the sodium stannate solution filter-pressing solid, quartz sand and coal powder mixture while conveying the mixture forwards by a rotating conveying screw rod (118);

step two: starting a heating block (115) to heat the smelting tank (101), enabling a sodium stannate solution to filter and press solid, quartz sand and coal powder mixture to fall into an inner cavity of the smelting tank (101) from one end of a feeding cylinder (102), then gradually heating to be molten, continuously feeding and reacting;

step three: introducing compressed air into the molten material, wherein the compressed air carries floating slag in the molten material to rise and float on the surface of the molten material, and the compressed air enters the heat recovery pipe (119) and heats the feeding cylinder (102) to heat and dry subsequent materials;

step four: the lifting plate (114) rises to drive the molten material and the scum to rise, the molten material enters the inner cavity of the cooling box (105) through the filter screen (117) in the process of rising the molten material and the scum is intercepted by the filter screen (117);

step five: and (3) when the molten material completely enters the cooling box (105), cooling the molten material, when the molten material is completely cooled and solidified, taking out the solid, and thus obtaining the crude tin.

2. The process for smelting crude tin from sodium stannate solution press-filtration solids according to claim 1, wherein the crude tin extraction equipment comprises a smelting tank (101), a feeding cylinder (102), a cooling tank (105), a jacking plate (114), a filter screen (117), a conveying screw rod (118) and a heat recovery pipe (119), the feeding cylinder (102) is installed at the top of the smelting tank (101), the bottom of one end of the feeding cylinder (102) is communicated into the inner cavity of the smelting tank (101), the jacking plate (114) is arranged in the inner cavity of the smelting tank (101), the conveying screw rod (118) is installed in the inner cavity of the feeding cylinder (102), the spring-shaped heat recovery pipe (119) is installed in the inner wall of the feeding cylinder (102), the cooling tank (105) is installed at one side of the smelting tank (101), and an air inlet pump (109) is installed at the other side of the smelting tank (101), a filter screen (117) is installed at the joint of the cooling box (105) and the smelting tank (101), an air inlet (116) is arranged at the joint of the air inlet pump (109) and the smelting tank (101), the air inlet (116) is obliquely arranged, and the air inlet (116) is communicated to the output end of the air inlet pump (109).

3. The process for smelting crude tin from sodium stannate solution filter-pressed solids according to claim 2, wherein a heating block (115) is installed in the inner wall of the bottom end of the smelting tank (101), a jacking cylinder (113) is installed at the bottom of the smelting tank (101) in a penetrating manner, the output shaft of the jacking cylinder (113) is connected to the bottom axial center of a jacking plate (114), and the jacking plate (114) is abutted to the inner wall of the smelting tank (101).

4. The process for smelting crude tin from sodium stannate solution filter-pressed solids according to claim 2, wherein a driving motor (104) is installed at one end of the feeding cylinder (102), an output shaft of the driving motor (104) is connected to one end of a conveying screw rod (118), a feeding hopper (103) is installed at the top of one end, close to the driving motor (104), of the feeding cylinder (102), and a heating net (122) is installed in an inner cavity of the conveying screw rod (118).

5. The process for smelting crude tin from sodium stannate solution filter-pressed solid objects is characterized in that an air inlet disc (121) is installed at one end, close to a feeding hopper (103), of a feeding cylinder (102), an air return disc (120) is installed at one end, far away from the feeding hopper (103), of the feeding cylinder (102), and the air return disc (120) and the air inlet disc (121) are respectively communicated with two ends of a heat recovery pipe (119).

6. The process for smelting crude tin from sodium stannate solution filter-pressed solids according to claim 5, wherein one end of the feeding cylinder (102) is provided with a circulating gas pipe (110), one end of the circulating gas pipe (110) is communicated to one side of a gas return disc (120), the other end of the circulating gas pipe (110) is communicated to the input end of a gas inlet pump (109), a gas inlet pipe (111) is arranged on the gas inlet pump (109), an electromagnetic valve is arranged on the gas inlet pipe (111), a gas delivery pipe (112) is arranged at the other end of the feeding cylinder (102), one end of the gas delivery pipe (112) is communicated to one side of the gas inlet disc (121), and the other end of the gas delivery pipe (112) is communicated to the inner cavity of the smelting tank (101).

7. The process for smelting crude tin from sodium stannate solution filter-pressing solids according to claim 1, wherein an air cooler (107) is installed at the top of the cooling box (105) in a penetrating manner, a discharge hole is formed in one side of the cooling box (105), a discharge gate (106) is rotatably installed on the discharge hole, a slag outlet is formed in the bottom of one side of the smelting tank (101), and a slag outlet (108) is rotatably installed on the slag outlet.

Technical Field

The invention relates to the field of recovery and treatment of waste storage batteries, in particular to a process for smelting crude tin from a sodium stannate solution filter-pressed solid.

Background

Although various new battery technologies are continuously developed at present, lead-acid batteries with the development history of more than 150 years still occupy the first place in the secondary battery market by virtue of the advantages of excellent cost performance, stable electrochemical performance, mature production process, higher recycling of waste products and the like, and the continuous increase of annual output represents the importance of the lead-acid batteries to human beings and also means that a large amount of lead is consumed on the lead-acid battery products every year;

lead-acid batteries are the major consumer products worldwide and also the leading renewable resource for lead. More than 80% of main raw materials of the Chinese regenerated lead come from waste lead-acid storage batteries, lead is used as a high-toxicity heavy metal, and the method has important significance for recycling lead in the waste lead-acid storage batteries from the viewpoint of environmental protection;

tin and lead contained in the accumulator are reduced and smelted together and enter the crude lead, slag is formed by fire refining to form sodium stannate which is removed from the lead, the sodium stannate can enter a solution through water under a certain condition, and then the industrial product of the sodium stannate is obtained by impurity removal and evaporative crystallization, but the obtained product can not be directly applied to alloy production, and if the product is not recycled, the waste of resources is caused;

therefore, a process for smelting crude tin from sodium stannate solution filter-pressed solid is needed to solve the above problems.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide a process for smelting crude tin from a solid object obtained by filter pressing of a sodium stannate solution, which comprises the following steps: the sodium stannate solution filter pressing solid, the quartz sand and the coal powder are added into the crude tin extraction equipment to be melted and then react, scum generated by impurities floats on the liquid level of the molten metal, then the molten metal is discharged from the lower part and then is cooled, the molten metal and the scum are effectively separated, and the problems that the industrial sodium stannate product obtained by the existing process recovery cannot be directly applied to alloy production, if the industrial sodium stannate product is not recovered, the waste of resources and the environmental pollution are caused are solved.

The purpose of the invention can be realized by the following technical scheme:

a process for smelting crude tin from a sodium stannate solution filter-pressed solid comprises the following steps:

the method comprises the following steps: adding the sodium stannate solution filter-pressing solid, the quartz sand and the coal powder into a feeding hopper of crude tin extraction equipment, starting a driving motor, driving a conveying screw rod to rotate by the operation of the driving motor, starting a heating net, releasing heat by the heating net, heating the mixture of the sodium stannate solution filter-pressing solid, the quartz sand and the coal powder while conveying forwards by the rotating conveying screw rod, and discharging water vapor from the feeding hopper;

step two: starting a heating block, heating the smelting tank by the heating block, enabling a sodium stannate solution filter-pressing solid, quartz sand and coal powder mixture to fall into an inner cavity of the smelting tank from one end of a feeding cylinder, gradually heating the sodium stannate solution filter-pressing solid, quartz sand and coal powder mixture until the mixture is molten, and continuously feeding and reacting;

step three: starting an air inlet pump, opening an electromagnetic valve on an air inlet pipe, introducing compressed air into a molten material, leading the compressed air to lift with scum in the molten material, floating on the surface of the molten material, then entering an air inlet tray through a conveying air pipe, heating a feeding barrel through a heat recovery pipe, closing a heating net, heating and drying subsequent materials by using hot air in the heat recovery pipe, then entering an air return tray, conveying to the air inlet pump through a circulating air pipe, and closing the electromagnetic valve to realize hot air circulation;

step four: starting the jacking cylinder, wherein a movable rod of the jacking cylinder extends to push the jacking plate to ascend so as to drive the molten material and the scum to ascend, the molten material enters the inner cavity of the cooling box through the filter screen in the ascending process of the molten material and the scum, and the scum is intercepted by the filter screen;

step five: and (3) when all the molten materials enter the cooling box, starting an air cooler, releasing cold air into an inner cavity of the cooling box by the air cooler for refrigeration, cooling the molten materials, opening a discharge door to take out solids after the molten materials are completely cooled and solidified, thus obtaining crude tin, falling the jacking plate to the initial position, driving the scum to descend, opening a slag discharge door to take out the scum.

As a further scheme of the invention: the crude tin extraction equipment comprises a smelting tank, a feeding cylinder, a cooling box, a jacking plate, a filter screen, a conveying screw rod and a heat recovery pipe, wherein the feeding cylinder is installed at the top of the smelting tank, one end bottom of the feeding cylinder is communicated into an inner cavity of the smelting tank, the jacking plate is arranged in the inner cavity of the smelting tank, the conveying screw rod is installed in the inner cavity of the feeding cylinder, the spring-shaped heat recovery pipe is installed in the inner wall of the feeding cylinder, the cooling box is installed on one side of the smelting tank, an air inlet pump is installed on the other side of the smelting tank, the filter screen is installed at the joint of the cooling box and the smelting tank, an air inlet is formed in the joint of the air inlet pump and the smelting tank, the air inlet is obliquely arranged, and the air inlet is communicated to the output end of the air inlet pump.

As a further scheme of the invention: install the heating piece in the bottom inner wall of smelting jar, the bottom of smelting jar is run through and is installed the jacking cylinder, the output shaft of jacking cylinder is connected to the bottom axle center department of jacking board, the jacking board is with the inner wall butt of smelting the jar.

As a further scheme of the invention: the feeding device is characterized in that a driving motor is installed at one end of the feeding cylinder, an output shaft of the driving motor is connected to one end of the conveying screw rod, a feeding hopper is installed at the top of one end, close to the driving motor, of the feeding cylinder, and a heating net is installed in an inner cavity of the conveying screw rod.

As a further scheme of the invention: the feeding device is characterized in that an air inlet disc is installed at one end, close to the feeding hopper, of the feeding barrel, an air return disc is installed at one end, far away from the feeding hopper, of the feeding barrel, and the air return disc and the air inlet disc are communicated with the two ends of the heat recovery pipe respectively.

As a further scheme of the invention: the smelting device is characterized in that a circulating air pipe is installed at one end of the feeding cylinder, one end of the circulating air pipe is communicated to one side of the gas return disc, the other end of the circulating air pipe is communicated to the input end of an air inlet pump, an air inlet pipe is installed on the air inlet pump, an electromagnetic valve is installed on the air inlet pipe, an air conveying pipe is installed at the other end of the feeding cylinder, one end of the air conveying pipe is communicated to one side of the air inlet disc, and the other end of the air conveying pipe is communicated to the inner cavity of the smelting pot.

As a further scheme of the invention: the air-cooler is installed in the top of cooler bin run-through, one side of cooler bin is provided with the bin outlet, rotate on the bin outlet and install the bin gate, the slag notch has been seted up to one side bottom of smelting the jar, rotate on the slag notch and install the slag notch door.

The invention has the beneficial effects that:

the invention relates to a process for smelting crude tin from a sodium stannate solution filter-pressed solid, which comprises the steps of adding the sodium stannate solution filter-pressed solid, quartz sand and coal powder into crude tin extraction equipment for melting and reacting, floating dross generated by impurities above the liquid level of molten metal, then discharging the molten metal from the lower part, cooling, and effectively separating the molten metal from the dross, so that the impurities can be fully removed, the prepared crude tin has high grade, good separation effect and good recovery effect, the resource waste is reduced, and the environmental pollution is avoided.

The crude tin extraction equipment releases heat through a heating net, a rotating conveying screw rod conveys and heats a sodium stannate solution filter-pressing solid, quartz sand and coal powder mixture while forwards, a heating block is started to heat a smelting tank, the sodium stannate solution filter-pressing solid, the quartz sand and the coal powder mixture fall into an inner cavity of the smelting tank from one end of a feeding cylinder, then the mixture is gradually heated to be molten, continuous feeding and reaction are carried out, compressed air is introduced into a molten material, the compressed air carries floating slag in the molten material to rise and float on the surface of the molten material, the molten material enters a heat recovery pipe after being compressed to be empty and heats the feeding cylinder, subsequent materials are heated and dried, a lifting plate rises to drive the molten material and the floating slag to rise, the molten material enters an inner cavity of a cooling box through the filter net in the process that the molten material and the floating slag rise, the floating slag is intercepted by the filter net, and the molten material completely enters the cooling box, cooling the molten material, and taking out the solid after the molten material is completely cooled and solidified to obtain crude tin; this crude tin extraction equipment realizes the transport of raw materials through carrying the hob, it is dry with its heating through the heating network, reduce the raw materials water content, later carry the raw materials after the drying to smelt in the jar, carry to the liquid level through carrying the dross in compressed air with the metal melt material, dross content is low in the metal melt liquid of assurance lower floor, dross is fully got rid of in the metal melt liquid after the filter screen filters, improve crude tin content, later will retrieve to the heat recovery pipe that sets up through the compressed air in the metal melt liquid, be used for drying subsequent raw materials, the heat is fully retrieved, reduce energy loss, this equipment smelts crude tin process energy consumption low, the crude tin grade that the preparation obtained is high.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic view of the structure of the crude tin extraction apparatus of the present invention;

FIG. 2 is a schematic view of the internal structure of the crude tin extraction apparatus of the present invention;

FIG. 3 is a view showing the connection of the heat recovery pipe, the return air plate, and the intake air plate in the present invention;

fig. 4 is a schematic view of the internal structure of the heating net of the present invention.

In the figure: 101. a smelting tank; 102. a feeding cylinder; 103. a feeding hopper; 104. a drive motor; 105. a cooling tank; 106. a discharge gate; 107. an air cooler; 108. a slag outlet door; 109. an intake pump; 110. a circulating gas pipe; 111. an air inlet pipe; 112. a gas delivery pipe; 113. jacking a cylinder; 114. a jacking plate; 115. a heating block; 116. an air inlet; 117. a filter screen; 118. conveying a screw rod; 119. a heat recovery pipe; 120. a gas return plate; 121. an air inlet disc; 122. the mesh is heated.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

referring to fig. 1-4, this embodiment is a process for smelting crude tin from a solid object obtained by press-filtering a sodium stannate solution, comprising the following steps:

the method comprises the following steps: pressing and filtering the sodium stannate solution to obtain solid, quartz sand and coal powder according to the mass ratio of 100: 1-2: 10, adding the raw tin into a feeding hopper 103 of a crude tin extraction device, starting a driving motor 104, driving a conveying screw rod 118 to rotate by the operation of the driving motor 104, starting a heating net 122, releasing heat by the heating net 122, heating the mixture of sodium stannate solution filter-pressed solid, quartz sand and pulverized coal while conveying the mixture forwards by the rotating conveying screw rod 118, and discharging water vapor from the feeding hopper 103;

step two: starting the heating block 115, heating the smelting tank 101 to 1000-;

step three: starting the air inlet pump 109, opening an electromagnetic valve on an air inlet pipe 111, introducing compressed air into the molten material, enabling the compressed air to lift up with scum in the molten material, floating on the surface of the molten material, then entering an air inlet disc 121 through an air conveying pipe 112, heating the feed cylinder 102 through a heat recovery pipe 119, closing a heating net 122, heating and drying subsequent materials by using hot air in the heat recovery pipe 119, then entering an air return disc 120, conveying the materials to the air inlet pump 109 through a circulating air pipe 110, and closing the electromagnetic valve to realize hot air circulation;

step four: after the molten material reacts for 1-2h, the jacking cylinder 113 is started, the movable rod of the jacking cylinder 113 extends to push the jacking plate 114 to ascend, so that the molten material and the scum are driven to ascend, the molten material enters the inner cavity of the cooling box 105 through the filter screen 117 in the ascending process of the molten material and the scum is intercepted by the filter screen 117;

step five: and (3) when all the molten materials enter the cooling box 105, starting the air cooler 107, releasing cold air into the inner cavity of the cooling box 105 by the air cooler 107 for refrigeration, cooling the molten materials, opening the discharge door 106 to take out solids when the molten materials are completely cooled and solidified, thus obtaining crude tin, falling back to the initial position by the jacking plate 114, driving the scum to descend, opening the scum door 108 and taking out the scum.

In the process, sodium stannate solution filter pressing solid, quartz sand and coal powder are added into crude tin extraction equipment to be melted and then react, scum generated by impurities floats on the liquid level of molten metal, then the molten metal is discharged from the lower part and then cooled, and the molten metal is effectively separated from the scum, so that the impurities can be fully removed, the grade of the prepared crude tin is more than 70%, the separation effect is good, the recovery effect is good, the resource waste is reduced, and the environmental pollution is avoided.

Example 2:

referring to fig. 1-4, the present embodiment is a crude tin extracting apparatus, which includes a smelting pot 101, a feeding cylinder 102, a cooling tank 105, a lifting plate 114, a filter screen 117, a conveying screw 118, and a heat recovery pipe 119, wherein the feeding cylinder 102 is installed at the top of the smelting pot 101, one end of the feeding cylinder 102 is connected to the inner cavity of the smelting pot 101, a jacking plate 114 is arranged in an inner cavity of the smelting tank 101, a conveying screw rod 118 is arranged in an inner cavity of the feeding cylinder 102, a spring-shaped heat recovery pipe 119 is arranged in the inner wall of the feeding cylinder 102, a cooling box 105 is arranged on one side of the smelting tank 101, an air inlet pump 109 is arranged on the other side of the smelting tank 101, a filter screen 117 is arranged at the joint of the cooling box 105 and the smelting tank 101, an air inlet 116 is arranged at the joint of the air inlet pump 109 and the smelting tank 101, the air inlet 116 is obliquely arranged, and the air inlet 116 is communicated to the output end of the air inlet pump 109;

the heating block 115 is installed in the inner wall of the bottom end of the smelting pot 101, the jacking cylinder 113 is installed at the bottom of the smelting pot 101 in a penetrating mode, the output shaft of the jacking cylinder 113 is connected to the bottom axis of the jacking plate 114, and the jacking plate 114 is abutted to the inner wall of the smelting pot 101.

A driving motor 104 is installed at one end of the feeding cylinder 102, an output shaft of the driving motor 104 is connected to one end of the conveying screw rod 118, a feeding hopper 103 is installed at the top of one end of the feeding cylinder 102 close to the driving motor 104, and a heating net 122 is installed in an inner cavity of the conveying screw rod 118.

An air inlet disc 121 is installed at one end, close to the feeding hopper 103, of the feeding cylinder 102, an air return disc 120 is installed at one end, far away from the feeding hopper 103, of the feeding cylinder 102, and the air return disc 120 and the air inlet disc 121 are respectively communicated with two ends of the heat recovery pipe 119.

A circulating gas pipe 110 is arranged at one end of the feeding cylinder 102, one end of the circulating gas pipe 110 is communicated to one side of the gas return disc 120, the other end of the circulating gas pipe 110 is communicated to the input end of the gas inlet pump 109, a gas inlet pipe 111 is arranged on the gas inlet pump 109, an electromagnetic valve is arranged on the gas inlet pipe 111, a gas conveying pipe 112 is arranged at the other end of the feeding cylinder 102, one end of the conveying gas pipe 112 is communicated to one side of the gas inlet disc 121, and the other end of the conveying gas pipe 112 is communicated to the inner cavity of the smelting tank 101.

The air-cooler 107 is installed in running through at the top of cooling box 105, and one side of cooling box 105 is provided with the bin outlet, rotates on the bin outlet and installs bin gate 106, and the slag notch has been seted up to one side bottom of smelting jar 101, rotates on the slag notch and installs slag gate 108.

This crude tin extraction equipment realizes the transport of raw materials through carrying hob 118, heat drying it through heating net 122, reduce the raw materials water content, later carry the raw materials after the drying to smelt in jar 101, carry the dross in the metal melt to the liquid level through carrying compressed air, guarantee that dross content is low in the lower floor metal melt, dross is fully got rid of in the metal melt after filter screen 117 filters, improve crude tin content, later will retrieve to the heat recovery pipe 119 that sets up through the compressed air in the metal melt, be used for drying subsequent raw materials, the heat is fully retrieved, reduce energy loss, this equipment smelts crude tin process energy consumption is low, the crude tin grade that the preparation obtained is high.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.