Production technology for processing graphite tailing solid waste into organic fertilizer

Abstract

The invention relates to a production technology for processing graphite tailing solid waste into an organic fertilizer, and belongs to the technical field of fertilizer processing. The graphite tailing solid waste is subjected to a series of treatment, the waste which is originally difficult to utilize is recycled, the organic fertilizer which is high in nutritional value and meets the national standard is finally obtained, stacking of industrial waste can be reduced, the pressure on the environment can be relieved, cyclic utilization of resources can be achieved, the resource utilization efficiency is improved, and the method is suitable for industrial production. Compared with the prior art, great improvement is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of fertilizer processing, and in particular relates to a production technology for processing graphite tailings solid waste into organic fertilizer. Background Art

[0002] Graphite tailings refer to the solid waste remaining after the processing of graphite ore, after beneficiation and purification. The main component of these tailings is soil, which usually contains a certain proportion of graphite, as well as other mineral components such as silicates and aluminates. As a by-product of graphite mining and processing, graphite tailings have long been regarded as an industrial waste.

[0003] The existing graphite tailings solid waste treatment scheme is mainly to use it in the construction field, through crushing and grinding and other processes to prepare cement and concrete, but the amount used is very small. If the graphite tailings solid waste can be effectively treated and utilized, it can not only reduce the accumulation of industrial waste and reduce the pressure on the environment, but also realize the recycling of resources and improve the efficiency of resource utilization. Summary of the invention

[0004] The purpose of the present invention is to provide a production technology for processing graphite tailings solid waste into organic fertilizer, which can process and effectively utilize graphite tailings solid waste in large quantities, realize the recycling of resources, and improve resource utilization efficiency.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A production technology for processing graphite tailings solid waste into organic fertilizer comprises the following steps: S1, taking 5-7 parts of graphite tailings solid waste, 2-4 parts of straw and 0-1 parts of livestock manure by volume, using a drying equipment to dehydrate the graphite tailings solid waste to obtain dehydrated slag; S2, crushing the straw by a crusher to obtain crushed straw; S3, after dehydrated slag, crushed straw and livestock manure are mixed and sprayed with fermentation agent, and then mechanically turned and fermented by a turning machine, after the fermentation is completed, a finished organic fertilizer is obtained; S4, drying the organic fertilizer product obtained in step S3 by an organic fertilizer drying device, and then processing the dried organic fertilizer product into fertilizer granules by a granulating device; S5, bagging and packaging the fertilizer granules obtained in step S4.

[0006] Furthermore, the fermentation process in step S3 is aerobic fermentation, the fermentation temperature is greater than 20° C., and the fermentation time is 15 days.

[0007] Furthermore, the fermentation process in step S3 is anaerobic fermentation, the fermentation temperature is greater than 20° C., and the fermentation time is 90 days.

[0008] The beneficial effects of the present invention are: By carrying out a series of treatments on the solid waste of graphite tailings, the waste that was originally difficult to utilize can be recycled and finally organic fertilizer with high nutritional value and in line with national standards can be obtained. This can not only reduce the stacking of industrial waste and alleviate the pressure on the environment, but also realize the recycling of resources and improve resource utilization efficiency, which is a great improvement compared to existing technologies.

[0009] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The present invention is a process flow chart of a production technology for processing graphite tailings solid waste into organic fertilizers according to an embodiment of the present invention. DETAILED DESCRIPTION

[0011] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0012] The reagents or equipment used in the examples without indicating the manufacturer are all regular products that can be purchased through regular channels. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example

[0013] A production technology for processing graphite tailings solid waste into organic fertilizer comprises the following steps: S1. Take 7 parts of graphite tailings solid waste and 3 parts of straw by volume, use drying equipment to dehydrate the graphite tailings solid waste to obtain dehydrated slag.

[0014] S2, crushing the straw by a crusher to obtain crushed straw.

[0015] S3. After mixing the dehydrated slag and the crushed straw, the fermentation agent is sprayed on the mixture, and then mechanical turning and fermentation are carried out through a turning machine; during aerobic fermentation, the fermentation temperature is greater than 20° C. and the fermentation lasts for 15 days; during anaerobic fermentation, the fermentation temperature is greater than 20° C. and the fermentation lasts for 90 days; after the fermentation is completed, a finished organic fertilizer is obtained.

[0016] S4, drying the finished organic fertilizer product obtained in step S3 through an organic fertilizer drying device, and then processing the dried finished organic fertilizer product into fertilizer granules through a granulating device.

[0017] S5, bagging and packaging the fertilizer granules obtained in step S4.

[0018] Furthermore, in other embodiments, after step S3 is completed, the finished organic fertilizer can be directly bagged and packaged.

[0019] Furthermore, in other embodiments, the crushed straw can be replaced with waste fungus residue. Example

[0020] A production technology for processing graphite tailings solid waste into organic fertilizer comprises the following steps: S1. Take 6 parts of graphite tailings solid waste, 3 parts of straw and 1 part of livestock manure by volume, use drying equipment to dehydrate the graphite tailings solid waste to obtain dehydrated slag.

[0021] S2, crushing the straw by a crusher to obtain crushed straw.

[0022] S3, after dehydrated slag, crushed straw and livestock manure are mixed and sprayed with fermentation agent, and then mechanical turning and fermentation process is carried out by turning machine; during aerobic fermentation, the fermentation temperature is greater than 20°C and the fermentation is carried out for 15 days, and during anaerobic fermentation, the fermentation temperature is greater than 20°C and the fermentation is carried out for 90 days; after the fermentation is completed, the finished organic fertilizer is obtained.

[0023] S4, drying the finished organic fertilizer product obtained in step S3 through an organic fertilizer drying device, and then processing the dried finished organic fertilizer product into fertilizer granules through a granulating device.

[0024] S5, bagging and packaging the fertilizer granules obtained in step S4.

[0025] Furthermore, in other embodiments, after step S3 is completed, the finished organic fertilizer can be directly bagged and packaged.

[0026] Furthermore, in other embodiments, the crushed straw can be replaced with waste fungus residue.

[0027] The main component of the solid waste of graphite tailings is soil, and the organic matter content is relatively high, and it is not polluted by pesticides, fertilizers, etc. The present invention adds crushed straw, waste fungus residue or livestock and poultry manure into it, and then sprays fermentation bacteria for aerobic or anaerobic fermentation, and finally obtains an organic fertilizer product.

[0028] The organic fertilizer product obtained by the organic fertilizer production technology shown in the present invention has a high nutritional value, and the specific parameters are as follows: Organic matter content ≥30%; Mass number of total nutrients (N+P2O5+K2O) (on a drying basis) %: ≥4.0; Mass fraction of water (fresh sample): ≤30; pH: 5.5-8.5; Seed germination rate (G1) (%): ≥70; Mechanical impurity fraction (%): ≤0.5; Total arsenic (As) (on a dry basis) (mg / kg): ≤50; Total mercury (Hg) (on a dry basis) (mg / kg): ≤2; Total lead (Pb) (on a dry basis) (mg / kg): ≤50; Total chromium (Cr) (on a drying basis) (mg / kg): ≤150; Total cadmium (Cd) (on a drying basis) (mg / kg): ≤3; Ascaris egg mortality rate (%): ≥95%; Fecal coliform count (individuals / g): ≤100.

[0029] Furthermore, after experiments by Anhui Richland Biotechnology Co., Ltd. and inspection by the Anhui Product Quality Supervision and Inspection Institute, the organic fertilizer processed from graphite tailings solid waste through the production technology shown in the present invention has met the national regulations on organic fertilizer NY / T525-2021, thus providing a new field for the comprehensive utilization of graphite tailings solid waste.

[0030] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0031] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A production technology for processing graphite tailings solid waste into organic fertilizer, characterized in that: The following steps are involved: S1, taking 5-7 parts of graphite tailings solid waste, 2-4 parts of straw and 0-1 parts of livestock manure by volume, using a drying equipment to dehydrate the graphite tailings solid waste to obtain dehydrated slag; S2, crushing the straw by a crusher to obtain crushed straw; S3, after dehydrated slag, crushed straw and livestock manure are mixed and sprayed with fermentation agent, and then mechanically turned and fermented by a turning machine, after fermentation, a finished organic fertilizer is obtained; S4, drying the organic fertilizer product obtained in step S3 by an organic fertilizer drying device, and then processing the dried organic fertilizer product into fertilizer granules by a granulating device; S5, bagging and packaging the fertilizer granules obtained in step S4.

2. The production technology of processing graphite tailings solid waste into organic fertilizer as claimed in claim 1, characterized in that: The fermentation process in step S3 is aerobic fermentation, the fermentation temperature is greater than 20° C., and the fermentation time is 15 days.

3. The production technology of processing graphite tailings solid waste into organic fertilizer as claimed in claim 1, characterized in that: The fermentation process in step S3 is anaerobic fermentation, the fermentation temperature is greater than 20° C., and the fermentation time is 90 days.

Images