slaking process of lime：Calcium hydroxide production line leads the way
In construction engineering and chemical production, the processing and application of lime materials have always been the focus of the industry. As a basic process link, lime slaking directly affects the quality and performance of the final product. Today, we will introduce the process characteristics of lime slaking and its practical application in calcium hydroxide production.
The chemical nature of lime slaking
Lime slaking, commonly known as the digestion or digestion process in the industry, refers to the process in which quicklime (CaO) reacts with water to produce slaking lime (Ca(OH)₂). The chemical reaction formula is: CaO + H₂O → Ca(OH)₂ + 64.8kJ. It is worth noting that qualified calcium oxide reacts very quickly when it comes into contact with water, usually within a few seconds, accompanied by significant heat release and volume expansion effect, with an expansion coefficient of up to 1.5-2 times.
Industrial slaking process: comparison of dry and wet methods
In actual production, lime slaking processes are mainly divided into two types: ash slaking and ash slaking. The choice depends on water consumption control and final product requirements.
Ash slaking uses natural moisture absorption to pile up block quicklime in a specific site, so that it slowly absorbs moisture from the air and eventually converts into powdered slaking lime. This method is easy to operate and has low equipment requirements. It is suitable for scenarios where product fineness is not high, such as temporary buildings or low-grade mortar preparation. However, due to its dependence on ambient humidity, its slaking speed is slow and the product uniformity is relatively poor.
Ash slaking uses graded water addition combined with 3mm×3mm sieve filtration to finally produce a paste-like lime slurry. The key to this process is to control the slaking time (usually ≥15 days) to solve the problems of under-fired lime (insufficient calcination, low utilization) and over-fired lime (surface glazing, delayed slacking) in the raw materials. If not handled properly, over-fired lime continues to mature in the later stage, which may cause cracking of the product due to expansion. Therefore, a standardized “aging” process (about 2 weeks of standing) is essential to ensure that the lime is fully matured and improve the stability of the finished product.
The composition and operation of the calcium hydroxide production line
In order to efficiently produce calcium hydroxide, the calcium hydroxide production line came into being. It is widely used in many industries, such as the preparation of slaked lime in lime plants, lime digestion in the sintering batching room of steel plants, quicklime digestion in desulfurization systems, preparation of calcium treatment agents for sewage treatment, preparation of high-quality calcium hydroxide in fine chemicals, and even paint wall putty powder and other industries. The entire production line is mainly composed of a crushing system, quicklime storage system, automatic weighing and digestion system, dust collection and purification system, airflow sorting system, storage and packaging system, electrical control system and other parts. Each part has its own duties to jointly ensure the smooth progress of production.
CRQ calcium hydroxide production line: an industry model of ingenuity
Among many calcium hydroxide production lines, CRQ calcium hydroxide production line stands out with its unique advantages. Its product capacity is between 5-30t/h. Although the product fineness is not yet clear, it can be widely used in many fields such as metallurgy, construction, medicine, food, sugar and chemical industry, papermaking, feed additives, fertilizer agriculture, petroleum additives, waste incineration flue gas treatment, sewage treatment, coal-fired power plant desulfurization, bleaching powder manufacturing, etc., showing strong adaptability.
Functional characteristics: Advanced technology creates excellent quality
The entire CRQ production line is mainly composed of CRSH series lime digester (dynamic digestion), delayed digestion bin (static digestion), CRHG series calcium hydroxide special mill, and CRXF series calcium hydroxide powder selector through different permutations and combinations. Based on the overall investment of the production line, plant area, total energy consumption, raw material quality, operating cost, and powder type application domain and competitive advantages, the production process and construction plan design can be customized for customers.
The technology is very advanced, and it has achieved energy conservation, environmental protection, and intelligent control, which greatly improves product quality and reduces operating costs. It is an efficient, green and environmentally friendly calcium hydroxide powder intelligent production line.
The combination of dynamic digestion and static digestion allows lime to be digested more fully, significantly improving the purity and quality of calcium hydroxide; the intelligent control system can accurately control the equipment operating parameters, reduce labor costs, and greatly improve production efficiency.
Application scenarios: Wide coverage, helping the development of multiple industries
The CRQ calcium hydroxide production line has demonstrated excellent adaptability in multiple industrial fields with its highly customized production process. In the metallurgical industry, the production line significantly improves the quality of steel sintering by precisely controlling the lime digestion process; in the construction field, it provides reliable guarantees for the production of various building materials by relying on its stable product quality. For industries with strict purity requirements such as medicine and food, the production line can adjust process parameters to meet high purity standards. In terms of environmental protection applications, whether it is waste incineration flue gas purification, sewage treatment or power plant desulfurization, the calcium hydroxide produced by it shows excellent pollutant removal effects. At the same time, the production line can also flexibly adjust the fineness and purity of the finished product according to the characteristics of different raw materials and terminal uses (such as papermaking additives, agricultural fertilizers, petroleum additives, etc.), realize the precise transformation from raw materials to finished products, and truly achieve a personalized production model of “one factory, one policy”.
The slaking process of lime and the calcium hydroxide production line complement each other. From basic chemical reactions to complex production systems, they jointly provide indispensable calcium hydroxide products for many industries and promote the development of related industries. Cronus believes that the calcium hydroxide production process will continue to innovate and bring more high-quality products and more efficient solutions to various industries.
If you need efficient and reliable calcium hydroxide production line equipment, Cronus’ professional team is at your service at any time!
We provide customized calcium hydroxide production solutions, covering the entire process from raw material processing, aging process to finished product packaging, suitable for metallurgy, environmental protection, construction, food and medicine and other fields. We can provide the most optimized equipment configuration and process solutions based on your raw material characteristics, production capacity requirements and product standards.
