Saudi Arabia Hollow Block Machine Price

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How to ensure the uniformity of the raw materials of the hollow block machine to improve the quality of the bricks can be started from the selection of raw materials, mixing process, conveying links and other aspects. The specific methods are as follows:

Selection and processing of raw materials
Raw material quality control: Select raw materials with stable quality, such as cement, sand and gravel, fly ash, etc. Ensure that the cement grade, setting time and other indicators meet the requirements, the particle size distribution of sand and gravel is uniform, the mud content is low, and the fineness of fly ash, loss on ignition and other parameters are stable. For different batches of raw materials, strict inspection and screening must be carried out to ensure their consistent performance.
Raw material pre-processing: Crushing and screening of bulk or large-particle raw materials to make their particle size reach the appropriate range and be evenly distributed. For example, crushing large pieces of limestone into 5-10mm particles, and screening out oversized or undersized particles through a vibrating screen to ensure the consistency of the raw material particle size, which is conducive to subsequent uniform mixing. For raw materials with high humidity, such as wet sand, drying can be carried out to stabilize the moisture content within a certain range to avoid agglomeration of raw materials or uneven mixing due to uneven moisture.
Optimization of mixing process
Choose a suitable mixer: Choose a mixer of suitable type and specification according to the production scale and raw material characteristics. The forced mixer has strong mixing force and good mixing effect, which can make the raw materials reach a uniform mixing state in a short time. It is suitable for the production of hollow blocks with high mixing uniformity requirements.
Control mixing parameters: Reasonably set parameters such as mixing time, speed and mixing blade angle. Generally speaking, the mixing time is preferably 3-5 minutes, the speed is adjusted according to the type of mixer and the characteristics of the raw materials, and the blade angle must ensure that the raw materials can be fully turned and mixed. During the mixing process, the mixing uniformity of the raw materials can be checked through the observation window or sampling detection, and the mixing parameters can be adjusted in time.
Use secondary mixing process: First, some raw materials are mixed for the first time to make them preliminarily mixed, and then the remaining raw materials are added for secondary mixing. For example, cement and part of the sand are mixed first, and then the remaining sand, gravel and water are added for secondary mixing. This can make the various raw materials more fully contact and mixed, and improve uniformity.

Control of conveying and storage links

Selection and maintenance of conveying equipment: Select appropriate conveying equipment, such as belt conveyors, screw conveyors, etc., and perform regular maintenance and upkeep on them. The belt conveyor should ensure that the belt runs smoothly without deviation or slipping, and the spiral blades of the screw conveyor should be free of wear and deformation to ensure that the raw materials do not segregate during the conveying process.
Reasonable storage and feeding: The design of the raw material storage bin should be reasonable to avoid dead corners and material accumulation. When feeding the mixer, a uniform feeding device, such as a quantitative feeder, should be used to control the feeding speed and amount so that various raw materials enter the mixer evenly according to the set ratio.
Quality inspection and monitoring
Establish an inspection system: Regularly inspect the uniformity of raw materials and the quality of bricks. Use chemical analysis, particle size inspection, compressive strength test and other methods to inspect the composition, particle size distribution and physical properties of raw materials, and promptly discover raw material uniformity problems and brick quality defects so as to take corresponding improvement measures.
Online monitoring technology: Use advanced online monitoring equipment, such as laser particle size analyzers, near-infrared spectrometers, etc., to monitor the particle size, composition and other parameters of raw materials in real time. Once the parameters deviate from the set value, the system automatically alarms and prompts the operator to make adjustments, thus achieving dynamic monitoring and precise control of the uniformity of raw materials.

Poor raw material uniformity of hollow block machine will have adverse effects on raw material performance, production process and product quality, as follows:
Affect the overall performance of raw materials
Reduced strength: Cement, as a cementitious material, if unevenly distributed in the raw materials, will lead to different bonding degrees in various parts of the block. Parts with low cement content cannot form sufficient bonding force, and are prone to cracks and breakage when subjected to force, thereby reducing the overall strength of the block and making it difficult to meet the bearing requirements of the building structure.
Affect durability: If the admixtures in the raw materials, such as fly ash and slag, are unevenly distributed, the pore structure inside the block will be uneven. If the pores are too large or too small and the distribution is disordered, it will make it easier for external media such as moisture and air to invade the interior of the block, accelerate the aging and corrosion process of the block, reduce its durability indicators such as impermeability and frost resistance, and shorten the service life of the block.
Change shrinkage performance: Poor raw material uniformity will cause different shrinkage rates in various parts of the block during the drying process. Excessive shrinkage in some parts will generate internal stress. When the internal stress exceeds the tensile strength of the block, shrinkage cracks will appear, affecting the appearance and performance of the block, and may also provide a channel for the invasion of external moisture and harmful substances.
Interference with the normal progress of the production process
Affecting the mixing efficiency: Poor uniformity of raw materials, especially when there are large particles or lumps, will increase the load of the mixer, increase the current of the mixing motor, and may even cause the motor to shut down due to overload protection. At the same time, uneven raw materials require longer mixing time to achieve a relatively uniform state, which reduces production efficiency and increases energy consumption.
Cause mold blockage: Uneven raw materials may contain particles or lumps with too large a particle size. When filling the mold with raw materials, these large particles or lumps are easily stuck in the feed port of the mold or the narrow part inside the mold, causing mold blockage and affecting the normal molding process.
Leading to increased equipment wear: When hard particles or lumps in the raw materials flow and mix in the equipment, they will cause excessive wear on the paddles, mixing shafts, barrels of the mixer, and pipes, conveyor belts and other parts of the conveying equipment, reducing the service life of the equipment and increasing equipment maintenance costs and downtime.
Reduced product quality and appearance quality
Size deviation: Poor uniformity of raw materials will lead to different filling densities in various parts during the molding process. In areas with high filling density, the blocks shrink less after demoulding; in areas with low filling density, the shrinkage is large, which causes the size of the blocks to deviate, unable to meet the precision requirements of construction, and affecting the flatness and verticality of the wall.
Appearance defects: Uneven distribution of raw materials will cause defects such as inconsistent color, pockmarks, and honeycombs on the surface of the blocks. Inconsistent color affects the overall aesthetics of the building, and pockmarks and honeycombs will make the surface of the blocks uneven, increasing the difficulty of subsequent wall plastering and other processes, and these defects may also become hidden dangers of wall leakage.
Increased scrap rate: Due to the poor uniformity of raw materials, problems such as insufficient strength, dimensional deviation, and appearance defects will cause a large number of blocks to fail to meet quality standards and become scrap, increasing production costs and reducing production efficiency.

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