Solid waste treatment method for zinc oxide slag and iron oxide slag

Abstract

The invention discloses a zinc oxide slag and iron oxide slag solid waste treatment method. The method specifically comprises the following steps that zinc oxide slag and iron oxide slag are conveyed to a ball mill through a hopper to be smashed; conveying the crushed materials to a winnowing machine by a ball mill for winnowing; the winnowed materials enter a magnetic separator for magnetic separation, and meanwhile, a dust remover is arranged for dust removal; iron powder separated by the magnetic separator enters a derusting machine for derusting, and a 300-bag high-temperature bag-type dust collector is arranged; the materials treated by the derusting machine pass through a vibrating screen, are divided by different screen mesh numbers according to requirements and are finally loaded into ton bags, and tailings fall to the ground after being stirred by double shafts and added with water. The invention has the advantages that: the treatment process has the advantages of no sewage, no dust and no pollution, can effectively treat solid waste, is reasonable in process, and has good popularization prospect and environment-friendly economic value.

Description

Technical Field

[0001] The invention relates to a method for treating solid waste of zinc oxide slag and iron oxide slag. Background Art

[0002] With the rapid development of industry, the amount of industrial solid waste such as zinc oxide slag and iron oxide slag is increasing. If these solid wastes are not properly handled, they will not only occupy a large amount of land resources, but also cause serious pollution to the environment. Traditional solid waste treatment methods often have many disadvantages. On the one hand, some treatment methods may produce a large amount of sewage. If these sewage are directly discharged without effective treatment, they will cause serious pollution to the soil and water bodies and destroy the ecological balance. At the same time, sewage treatment requires a lot of money and manpower, which increases the cost burden of enterprises. On the other hand, some treatment processes will generate a lot of dust during operation. The dust will not only affect the health of the operators, but also cause air pollution to the surrounding environment. Moreover, the emission of dust does not meet the country's increasingly stringent environmental protection requirements, and enterprises may face risks such as environmental penalties.

[0003] In addition, the existing solid waste treatment methods are often difficult to achieve reasonable and efficient processes when treating zinc oxide slag and iron oxide slag. Some treatment methods may not be able to fully recover the valuable components, resulting in waste of resources; others are difficult to be widely promoted and applied due to the complex treatment process and high cost.

[0004] In summary, there is an urgent need for a method that can effectively treat solid wastes such as zinc oxide slag and iron oxide slag to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a method to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is: a method for treating zinc oxide slag and iron oxide slag solid waste, which specifically comprises the following steps:

[0007] 1) The zinc oxide slag and the iron oxide slag are conveyed to the ball mill through the hopper for crushing;

[0008] 2) The crushed materials are transported from the ball mill to the air separator for air separation;

[0009] 3) The materials after air separation enter the magnetic separator for magnetic separation, and are equipped with a dust collector for dust removal;

[0010] 4) The iron powder selected by the magnetic separator enters the rust removal machine for rust removal, equipped with a 300-bag high-temperature bag dust collector;

[0011] 5) The material after being processed by the rust remover passes through a vibrating screen and is divided according to the needs with different screen mesh sizes, and finally loaded into ton bags, while the tailings are stirred by a double-axis mixer and then fall to the ground.

[0012] Preferably, the ball mill in step 1) is equipped with a high-temperature dust removal bag filter.

[0013] More preferably, the number of dust removal bags is more than 300 bags.

[0014] The advantages of the present invention are: the treatment process of the present invention has the advantages of no sewage, no dust, and no pollution, can effectively treat solid waste, has a reasonable process, and has good promotion prospects and environmental protection and economic value. DETAILED DESCRIPTION

[0015] For the purpose of the following detailed description, it should be understood that the present invention may adopt various alternative changes and step sequences, unless expressly specified to the contrary. In addition, except in any operating examples, or otherwise indicated, all numbers representing the amount of ingredients used in the specification and claims should be understood to be modified by the term "about" in all cases. Therefore, unless otherwise indicated, the numerical parameters set forth in the following specification and the attached claims are approximate values ​​that vary according to the desired performance to be obtained by the present invention. At least it is not intended to limit the application of the doctrine of equivalents to the scope of the claims, and each numerical parameter should at least be interpreted according to the number of reported significant figures and by applying ordinary rounding techniques.

[0016] Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values ​​set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements.

[0017] In addition, it should be understood that any numerical range described herein is intended to include all subranges subsumed therein. For example, a range of "1 to 10" is intended to include all subranges between (and including) the stated minimum value of 1 and the stated maximum value of 10, i.e., having a minimum value equal to or greater than 1 and a maximum value equal to or less than 10.

[0018] Example

[0019] A method for treating zinc oxide slag and iron oxide slag solid waste, comprising the following steps:

[0020] First, the zinc oxide slag and iron oxide slag are conveyed to the ball mill through the hopper for crushing. The ball mill is equipped with a high-temperature dust bag dust collector, of which the number of dust bags is more than 300 bags to achieve the best dust removal effect;

[0021] The crushed materials are transported from the ball mill to the air separator for air separation;

[0022] The materials after air separation are then sent to the magnetic separator for magnetic separation, and a dust collector is also used for dust removal;

[0023] The iron powder selected by the magnetic separator enters the rust remover for rust removal. The high-speed operation of the rust remover makes the iron powder generate a temperature of about 200 degrees. At this time, a 300-bag high-temperature bag dust collector must be equipped;

[0024] The materials processed by the rust remover pass through a vibrating screen and are diverted according to different screen mesh sizes as required, and are finally loaded into ton bags. The tailings are stirred by a double-axis mixer and then fall to the ground after adding water.

[0025] The process of the present invention is compared with the existing traditional processing method as follows:

[0026] Dust emission comparison: Before treatment, the dust concentration of zinc oxide slag and iron oxide slag under conventional treatment is 3-10 mg / m 3 After adopting the treatment method of the present invention, the dust concentration monitored in each link is lower than 0.5mg / m 3 , far below the relevant national environmental protection standards.

[0027] Wastewater generation: Traditional treatment methods generate 10-15 liters of wastewater per ton of solid waste on average. The treatment process of the present invention does not detect wastewater generation during the treatment process.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for treating zinc oxide slag and iron oxide slag solid waste, characterized in that: The specific steps include: 1) The zinc oxide slag and the iron oxide slag are conveyed to the ball mill through the hopper for crushing; 2) The crushed materials are transported from the ball mill to the air separator for air separation; 3) The materials after air separation enter the magnetic separator for magnetic separation, and are equipped with a dust collector for dust removal; 4) The iron powder selected by the magnetic separator enters the rust removal machine for rust removal, equipped with a 300-bag high-temperature bag dust collector; 5) The material after being processed by the rust remover passes through a vibrating screen and is divided according to the needs with different screen mesh sizes, and finally loaded into ton bags, while the tailings are stirred by a double-axis mixer and then fall to the ground.

2. A method for treating zinc oxide slag and iron oxide slag solid waste according to claim 1, characterized in that: In the step 1), the ball mill is equipped with a high-temperature dust removal bag filter.

3. A method for treating zinc oxide slag and iron oxide slag solid waste according to claim 2, characterized in that: The number of dust removal bags is more than 300 bags.