Grinding aid for grinding quartz sand and application of grinding aid
By improving the grinding efficiency of quartz sand through compound grinding aids, the problems of long grinding time and serious over-grinding were solved, achieving efficient grinding and high yield, and improving the flotation recovery rate of quartz.
Patent Information
- Application Number
- CN202511779088.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-02-27
AI Technical Summary
Traditional quartz sand grinding processes suffer from low grinding efficiency, severe over-grinding, and limited effectiveness of single grinding aids, resulting in high energy consumption, raw material waste, and increased costs for subsequent classification.
A compound grinding aid is used, including a functional main agent (ammonium chloride, sodium chloride or a combination thereof) and an auxiliary synergist (sodium oleate or a combination thereof). By improving the grindability of the material and reducing frictional resistance, the grinding efficiency is improved synergistically and over-grinding is inhibited.
The grinding time is reduced by 30% to 40%, the proportion of over-ground particles above 120 mesh is reduced to 18%, the yield of target particle size is increased by 10% to 20%, and the flotation recovery rate of quartz is improved.
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Figure CN121571264A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of grinding aids, in particular to a grinding aid for quartz sand grinding and application thereof. BACKGROUND
[0002] As an important industrial mineral raw material, quartz sand is widely used in glass manufacturing, ceramic firing, precision casting, building decoration and other key fields due to its stable physical and chemical properties. In the industrial processing flow of quartz sand, grinding is the core link to determine product quality and production efficiency, and the core goal is to crush and grind quartz sand ore particles to a specific particle size that meets the needs of downstream applications.
[0003] The traditional quartz sand grinding process relies on mechanical crushing, which has three major problems: first, the grinding efficiency is low, and long grinding time is needed to reach the target particle size, with energy consumption accounting for 30%-50% of the entire processing flow; second, over-grinding is serious, with fine particles (such as 120 mesh or more) often accounting for more than 30%, which not only wastes raw materials but also increases subsequent classification costs; third, the effect of a single grinding aid is limited. SUMMARY
[0004] The purpose of the present application is to solve the problems raised in the background art, and a grinding aid for quartz sand grinding and application thereof are proposed.
[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions: A grinding aid for quartz sand grinding, comprising, by mass fraction: a functional main agent 50%-75%; an auxiliary synergist 25%-50%; The functional main agent is at least one of ammonium chloride and sodium chloride, or a combination of ammonium chloride and triethanolamine, or a combination of sodium chloride and triethanolamine; The auxiliary synergist is sodium oleate, or a combination of sodium oleate and triethanolamine.
[0006] As a further solution of the present application, the mass ratio of the functional main agent to the auxiliary synergist is 1-3:1; The functional main agent is compounded by ammonium chloride and sodium chloride in a mass ratio of 1-2:1-2; The auxiliary synergist is compounded by triethanolamine and sodium oleate in a mass ratio of 1-2:1-2.
[0007] As a further solution of the present application, the grinding aid is compounded by ammonium chloride, sodium chloride, triethanolamine, and sodium oleate in a mass ratio of 2:2:1:1.
[0008] The application of a grinding aid in the grinding of quartz sand, wherein the grinding aid is added to the grinding process of quartz sand, and the amount of the grinding aid added is 0.1% to 2% of the weight of the quartz sand.
[0009] Compared with the prior art, the application has the advantages that: 1. By compounding the functional main agent and the auxiliary synergist, the performance bottleneck of single grinding aid is broken, the functional main agent (ammonium chloride, sodium chloride or a combination thereof and triethanolamine) improves the grindability of the material, reduces the agglomeration of particles and improves the flowability of the material in the mill, the auxiliary synergist (sodium oleate or a combination thereof and triethanolamine) relies on the surface adsorption of the organic component to reduce the friction resistance, and the grinding time is shortened by 30% to 40% compared with the traditional process, which is much better than the effect of single inorganic or organic grinding aid; 2. The sodium oleate in the auxiliary synergist can be adsorbed on the surface of fine particles in a directional manner to prevent further crushing, effectively inhibit the over-grinding phenomenon, and reduce the proportion of over-ground particles of 120 mesh or more from 35% in the traditional process to 18%, thereby increasing the yield of the target particle size (80-120 mesh) by 10% to 20%; 3. Triethanolamine can optimize the surface properties of quartz sand, and in subsequent systems of dodecylamine or sodium oleate flotation, the flotation recovery rate of quartz is improved, and the subsequent reagent consumption is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 The particle size distribution of quartz sand after grinding at a rotation speed of 400 Hz for 50 min with the addition of 1% of the compounded grinding aid, 1% of the main grinding aid, 0.5% of the auxiliary grinding aid and without the addition of the grinding aid. DETAILED DESCRIPTION
[0011] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application. EMBODIMENT
[0012] Step one: 250g of ammonium chloride and 250g of sodium chloride are weighed and mixed in a mixer for 30 minutes to obtain a functional main agent with a mass ratio of 1:1; 125g of triethanolamine and 125g of sodium oleate are weighed, preheated in a 40°C water bath for 10 minutes, and the sodium oleate is added in five times with an interval of 5 minutes, and stirred at 800r / min for 20 minutes; a auxiliary synergist with a mass ratio of 1:1 is obtained; the functional main agent and the auxiliary synergist are added to the mixer (rotation speed 20r / min) and mixed for 40 minutes to obtain a finished grinding aid with a mass ratio of 2:2:1:1; Step two: take 1000g quartz sand raw material with 40 mesh size, put it into the laboratory horizontal ball mill, add 10g of the above grinding aid (1% of the weight of quartz sand); Step three: add deionized water to adjust the pulp concentration to 50% (liquid-solid ratio 1:1); Step four: add the pulp and steel balls to the ball mill, set the speed to 400Hz, and grind for 30 minutes; Step five: after grinding, filter and dry the pulp (60°C, 2h), and perform particle size analysis.
[0013] The results show that the yield of quartz sand below 80 mesh in the grinding product is 7.8%, the yield of quartz sand between 80-120 mesh is 74.8%, and the yield of quartz sand above 120 mesh is 17.4%.
[0014] Comparative example one Step one: weigh 500g of ammonium chloride and 500g of sodium chloride, mix them in a mixer for 30 minutes to obtain a finished grinding aid with a mass ratio of 1:1; Step two: take 1000g quartz sand raw material with 40 mesh size, put it into the laboratory horizontal ball mill, add 10g of the above grinding aid (1% of the weight of quartz sand); Step three: add deionized water to adjust the pulp concentration to 50% (liquid-solid ratio 1:1); Step four: add the pulp and steel balls to the ball mill, set the speed to 400Hz, and grind for 30 minutes; Step five: after grinding, filter and dry the pulp (60°C, 2h), and perform particle size analysis.
[0015] The results show that the yield of quartz sand below 80 mesh in the grinding product is 9.0%, the yield of quartz sand between 80-120 mesh is 59.5%, and the yield of quartz sand above 120 mesh is 31.5%.
[0016] Comparative example two Step one: weigh 500g of triethanolamine and place it in a stirred tank with a temperature control device, preheat it in a 40°C water bath for 10 minutes to reduce viscosity; then slowly add 500g of sodium oleate in five portions, with a 5-minute interval between each addition, while maintaining a stirring speed of 800r / min, and continue stirring for 20 minutes to obtain a finished grinding aid (mass ratio 1:1); Step two: take 1000g quartz sand raw material with 40 mesh size, put it into the laboratory horizontal ball mill, add 5g of the above grinding aid (0.5% of the weight of quartz sand); Step three: continue to add deionized water to adjust the pulp concentration to 50% (liquid-solid ratio 1:1); Step four: the ore pulp and steel balls are added into the ball mill, the rotating speed is set to 400 Hz, and the grinding time is 30 min; Step five: after the grinding, the ore pulp is filtered and dried (60℃, 2h), and the particle size analysis is performed.
[0017] The results show that the yield of quartz sand below 80 mesh in the grinding product is 59.0%, the yield of quartz sand between 80 and 120 mesh is 27.5%, and the yield of quartz sand above 120 mesh is 13.55%.
[0018] Comparative example three Step one: no grinding aid is prepared (blank test); Step two: 1000g of quartz sand raw material with a particle size of 40 mesh (same batch as example one) is put into a laboratory horizontal ball mill without adding any grinding aid; Step three: deionized water is added to adjust the ore pulp concentration to 50% (liquid-solid ratio 1:1); Step four: the ore pulp and steel balls (same as example one) are added into the ball mill, the rotating speed is set to 400 Hz, and the grinding is stopped after the yield of the target particle size (80-120 mesh) is stable; Step five: after the grinding, the total time is recorded, the ore pulp is filtered and dried (60℃, 2h), and the particle size analysis and energy consumption statistics are performed. The results show that the grinding time is 50 min, the yield of quartz sand below 80 mesh in the grinding product is 20.9%, the yield of quartz sand between 80 and 120 mesh is 49.5%, and the yield of quartz sand above 120 mesh is 29.6%.
[0019] From the above examples and comparative examples, it can be clearly seen that the composite grinding aid of the present application has remarkable technical effect, far exceeding the blank control (comparative example three), and the effect of the composite scheme (example one) of the present application is better than that of the single composite scheme (comparative examples one and two).
[0020] It should be noted that triethanolamine can be a grinding aid for quartz, and also can improve the flotation recovery of quartz in a dodecylamine flotation system, so it can be used as a functional main agent or an auxiliary synergist.
[0021] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A grinding aid for quartz sand grinding, characterized in that, Including by mass fraction: Functional main agent 50%–75%; Adjuvant synergists: 25%–50%; The functional main agent is at least one of ammonium chloride and sodium chloride, or a combination of ammonium chloride and triethanolamine, or a combination of sodium chloride and triethanolamine; The auxiliary synergist is sodium oleate, or a combination of sodium oleate and triethanolamine.
2. The grinding aid for quartz sand grinding according to claim 1, characterized in that, The mass ratio of the main functional agent to the auxiliary synergist is 1 to 3:1; The functional main agent is composed of ammonium chloride and sodium chloride in a mass ratio of 1-2:1-2. The adjuvant is a compound of triethanolamine and sodium oleate in a mass ratio of 1-2:1-2.
3. The grinding aid for quartz sand grinding according to claim 1, characterized in that, The grinding aid is a compound of ammonium chloride, sodium chloride, triethanolamine, and sodium oleate in a mass ratio of 2:2:1:
1.
4. The application of the grinding aid according to any one of claims 1 to 3 in quartz sand grinding, characterized in that, The grinding aid is added to the quartz sand grinding process at an amount of 0.1% to 2% of the weight of the quartz sand.