A wear resistance test method and device for crushing teeth of double-toothed roller crusher for mining
The abrasion index of crushed teeth of the double-tooth roller crusher is determined through a special wear resistance test system, which solves the problem of difficult to accurately predict the service life of crushed teeth in the prior art, and achieves more accurate life prediction and production performance optimization.
Patent Information
- Application Number
- CN202411945543.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-04-08
AI Technical Summary
The prior art is difficult to accurately predict the service life of crushed teeth of the double-tooth roller crusher, resulting in the failure to meet the production capacity in the later stage of wear or the large number of spare parts, resulting in the problem of increasing costs and energy consumption.
A special wear resistance test system is used to test the crushing of a certain amount of ore, calculate the abrasion index of the material to the crushed teeth, and determine the service life of the crushed teeth. Specific steps include material preparation and weighing before the test, starting the test device, conducting test and recording, calculating wear and wear rates, and finally estimating the life of the broken teeth.
This method can accurately obtain crushed teeth wear under different rock physical characteristics, predict the service life of crushed teeth, improve the prediction accuracy, and avoid the problems of declining production capacity and increasing spare parts batches.
Smart Images
Figure CN119779656A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of machinery, in particular to a crushing technology, and more particularly to a wear resistance test method and device for a mining crusher. Background Art
[0002] Double-toothed roll crusher is widely used in the coarse and medium crushing of brittle block materials in mining, metallurgy, chemical industry, coal mining and other industries due to its excellent crushing performance and applicability. During the crushing process of double-toothed roll crusher, the crushing teeth are directly subjected to the impact and extrusion from the materials, and are most susceptible to wear and tear until they are damaged. The wear state of the crushing teeth directly affects the processing capacity, discharge particle size, power consumption and other working performance of the double-toothed roll crusher. Therefore, it is necessary to understand the abrasive performance of the crushing teeth under the working conditions of crushing a certain ore and estimate the service life of the crushing teeth.
[0003] In actual projects, the life of the crushing teeth is usually estimated by referring to the life of the crushing teeth when crushing a certain type of ore, or by using a wear tester to estimate the life of the crushing teeth by using the same material as the crushing teeth to abrade the ore. When estimating based on actual project data, it is difficult to accurately estimate the life due to the large differences in material parameters such as rock strength and material composition in different regions; when using the wear test method, the wear form is inconsistent with the wear form in the actual crushing process, resulting in poor credibility of the data, which brings certain difficulties to the designer in estimating the life index of the crushing teeth. Once the prediction is inaccurate, there will be problems such as the production capacity not meeting the standards after the crushing teeth wear, or the replacement of spare parts in batches will increase costs and energy consumption. Summary of the invention
[0004] In order to accurately predict the service life of the crushing teeth and understand the difference in wear rate of the crushing teeth of the same model of double-toothed roller crusher for different minerals, it is necessary to conduct wear resistance tests on the minerals to be crushed, and measure the wear resistance and abrasion index of the crushing teeth when crushing a certain ore through the test system to predict the life of the crushing teeth of the double-toothed roller crusher. The purpose of the present invention is to provide a wear resistance test method and device for crushing teeth of double-toothed roller crushers for mining. A certain amount of ore is crushed by the test device, and the abrasive index of the material on the crushing teeth is calculated to determine the service life of the crushing teeth of industrial double-toothed roller crushers. The specific technical scheme is as follows:
[0005] A method for testing the wear resistance of crushing teeth of a double-toothed roller crusher for mining, comprising the following steps:
[0006] Material preparation before the test: prepare 1000kg of test material, put it in multiple woven bags, and place it next to the feed crushing bin;
[0007] Weighing work before the test: remove all the crushing teeth of the double-toothed roller crusher, clean them, weigh them with a balance and record the weight data of each crushing tooth, calculate the total weight G1, check the crusher, and restore the crushing teeth assembly;
[0008] Start the test device: Start the double-toothed roller crusher through the electronic control system;
[0009] Test and record: pour 1000kg of test material into the feed crushing bin in an orderly manner until all the material is crushed and discharged from the discharge hopper; remove all crushing teeth of the double-toothed roller crusher, clean them, weigh them with a balance and record the weight data of each crushing tooth, calculate the total weight G2, check the crusher, and restore the crushing teeth assembly;
[0010] Wear calculation: subtract the total weight of the crushing teeth after crushing from the total weight of the crushing teeth before the experiment to obtain the wear weight G3 of the crushing teeth for crushing 1000kg of test material, G3 = G1-G2, then the wear of the crushing teeth W, W = G3; the unit is g / t;
[0011] Calculation of the wear rate of the crushing teeth: Divide the wear W by the design weight G of the crushing teeth of the double-toothed roller crusher selected in the actual project to obtain the wear rate A (%) of the crushing teeth crushing 1000kg of test material, A=W / G.
[0012] Calculation of the life of the crushing teeth: Based on actual engineering experience, determine the wear rate B when the crushing teeth reach their lifespan. When the processing capacity of the double-toothed roller crusher is Q, where Q is measured in tons / hour (t / h), the estimated lifespan of the crushing teeth is L, where L = B / (A×Q) and L is measured in hours (h).
[0013] The present invention further discloses a device for implementing the wear resistance test method of crushing teeth of a mining double-toothed roller crusher, comprising a double-toothed roller crusher, an auxiliary steel structure, a feeding crushing bin, and a discharge hopper; the auxiliary steel structure is supported on the ground, the double-toothed roller crusher is installed on the auxiliary steel structure, the feeding crushing bin is above the double-toothed roller crusher, the discharge hopper is below the double-toothed roller crusher, and the feeding crushing bin and the discharge hopper are also installed on the auxiliary steel structure.
[0014] Furthermore, the device also includes an electric control system for controlling the opening and closing of the double-toothed roller crusher.
[0015] Compared with the prior art, the present invention has the following advantages: the present invention adopts a special wear resistance test system to obtain the wear of the crushing teeth of the double-toothed roller crusher under different rock physical properties through experiments, and can predict the service life of the crushing teeth according to the wear with higher accuracy.
[0016] The invention will be widely applied in the technical field of mining double-toothed roller crushers. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a three-dimensional diagram of the present invention;
[0018] Figure 2 It is the front view of the present invention. DETAILED DESCRIPTION
[0019] The present invention is described in detail below with reference to the accompanying drawings and embodiments.
[0020] See attached Figure 1-2 :
[0021] The specific use steps of the present invention are:
[0022] Material preparation before the test: Understand and record the physical properties of the stripped material, including the uniaxial compressive strength of the rock, ore density, etc., crush and screen the stripped material, select rocks with a finished particle size of ≤250mm×250mm×250mm, prepare 1000kg of stripped material that meets the test requirements by weighing, pack it in multiple woven bags, and place it next to the feed crushing bin 3.
[0023] Weighing work before the test: remove all the crushing teeth of the double-toothed roller crusher, clean them, weigh them with a balance and record the weight data of each crushing tooth (there are numbered marks on the crushing teeth), calculate the total weight G1, check the crusher, and restore the crushing teeth.
[0024] Start the test device: Start the double-toothed roller crusher 1 through the electronic control system.
[0025] Test and record: The test personnel pour the test materials into the feeding trough of the feeding and crushing bin in an orderly manner on the auxiliary steel structure until all the materials are crushed and discharged from the discharge hopper. Remove all the crushing teeth of the double-toothed roller crusher, clean them, weigh them with a balance and record the weight data of each crushing tooth (there are numbered marks on the crushing teeth), calculate the total weight G2, check the crusher, and restore the crushing teeth assembly.
[0026] Wear calculation: subtract the total weight of the crushing teeth after crushing from the total weight of the crushing teeth before the experiment to obtain the wear weight G3 of the crushing teeth crushing 1000kg of material. G3=G1-G2, then the wear of the crushing teeth W, W=G3 (g / t).
[0027] Calculation of the wear rate of the crushing teeth: Divide the wear W by the design weight G of the crushing teeth of the double-toothed roller crusher selected in the actual project to obtain the wear rate A (%) of the crushing teeth crushing 1000kg of material, A=W / G.
[0028] Calculation of the life of the crushing teeth: Based on actual engineering experience, determine the wear rate B when the crushing teeth reach their lifespan. When the processing capacity of the double-toothed roller crusher is Q, in tons / hour (t / h), the estimated lifespan of the crushing teeth is L, L=B / (A×Q), in hours (h).
[0029] A device for implementing the wear resistance test method of crushing teeth of a mining double-toothed roller crusher comprises a double-toothed roller crusher 1, an auxiliary steel structure 2, a feeding crushing bin 3, a discharging hopper 4, an electric control system, and a weighing device; the auxiliary steel structure 2 is supported on the ground, the double-toothed roller crusher 1 is installed on the auxiliary steel structure, the feeding crushing bin 3 is above the double-toothed roller crusher 1, the discharging hopper 4 is below the double-toothed roller crusher 1, and the feeding crushing bin 3 and the discharging hopper 4 are also installed on the auxiliary steel structure 2.
[0030] 1. Feeding and crushing bin:
[0031] The feeder crushing bin is a welded steel structure. The crushed material enters the crushing bin from the feeder chute and begins to fall into the double-toothed roller crusher. The feeder crushing bin is in the form of a funnel and is installed on an auxiliary steel structure.
[0032] 2. Double-toothed roller crusher:
[0033] The screening type double-toothed roller crusher is adopted, which mainly includes a motor, a reducer, a toothed roller and a machine body. The double-toothed roller crusher is installed on an auxiliary steel structure.
[0034] 3. Discharge hopper:
[0035] The discharge hopper is a welded steel structure in the form of a funnel, fixed to an auxiliary steel structure.
[0036] 4. Auxiliary steel structure:
[0037] The auxiliary steel structure is a welded structure used to support other components in the test system and provide ladders and platforms for test personnel to feed materials to the feed crushing bin. The auxiliary steel structure itself is supported on the cement floor.
Claims
1. A wear test method for crushing teeth of a double-toothed roller crusher for mining, characterized in that The following steps are involved: a. Material preparation before the test: prepare 1000kg of test material, pack it in multiple woven bags, and place it next to the feed crushing bin; b. Weighing work before the test: remove all the crushing teeth of the double-toothed roller crusher, clean them, weigh them with a balance and record the weight data of each crushing tooth, calculate the total weight G1, check the crusher, and restore the crushing teeth; c. Start the test device: Start the double-toothed roller crusher through the electronic control system; d. Test and record: pour 1000kg of test material into the feed crushing bin in an orderly manner until all the material is crushed and discharged from the discharge hopper; remove all the crushing teeth of the double-toothed roller crusher, clean them, weigh them with a balance and record the weight data of each crushing tooth, calculate the total weight G2, check the crusher, and restore the crushing teeth assembly; e. Wear calculation: subtract the total weight of the crushing teeth after crushing from the total weight of the crushing teeth before the experiment to obtain the wear weight G3 of the crushing teeth for crushing 1000kg of test material. G3 = G1-G2, then the wear of the crushing teeth W, W = G3; f. Calculation of the wear rate of the crushing teeth: Divide the wear W by the design weight G of the crushing teeth of the double-toothed roller crusher selected in the actual project to obtain the wear rate A of the crushing teeth crushing 1000kg of test material, A=W / G. g. Calculation of the life of the crushing teeth: Based on actual engineering experience, determine the wear rate B when the crushing teeth reach their life. The processing capacity of the double-toothed roller crusher is Q, and the estimated life of the crushing teeth is L, L = B / (A×Q).
2. A device for implementing the wear resistance test method of the crushing teeth of the mining double-toothed roller crusher according to claim 1, characterized in that: It includes a double-toothed roller crusher, an auxiliary steel structure, a feeding and crushing bin, and a discharge hopper; the auxiliary steel structure is supported on the ground, the double-toothed roller crusher is installed on the auxiliary steel structure, the feeding and crushing bin is above the double-toothed roller crusher, the discharge hopper is below the double-toothed roller crusher, and the feeding and crushing bin and the discharge hopper are also installed on the auxiliary steel structure.
3. The device according to claim 2, characterized in that: It also includes an electric control system for controlling the opening and closing of the double-toothed roller crusher.