This article takes a dry-mixed mortar mechanism gravel production line in Luoyang as an example, focusing on introducing the process design and equipment configuration plan of the dry-mix mortar fine mechanism sand and aggregate production line.
1. Process design
A dry-mixed mortar machine sand production line in Luoyang is mainly used to produce fine sand for ready-mixed mortar. The designed output is 50t / h, the raw material is crushed stone under 30mm, the fineness modulus of finished sand can be adjusted between 2.4-3.0 The content is controlled at 5% -15%. The core host equipment of the system configuration is a PLS1000 special-purpose fine sand machine produced by Luoyang Dahua. The finished product has good particle shape, stable particle size, low equipment cost and simple maintenance. Other supporting hosts include 1 set of YKR series multi-layer fine particle screening machine, 1 set of NHXA series high-efficiency powder separator, 1 set of environmental protection dust removal equipment, 3 sets of bucket elevators, 1 set of powder feed tank and other related measuring and conveying equipment Wait.
The production line is finely crushed and reshaped by the PLS1000 sand making machine. The crushed material is sieved by a multi-layer fine particle sieving machine. The unqualified sand is crushed again by the sand making machine. The stone powder content and particle size distribution in the adjustment mechanism sand are adjusted to ensure the continuous and stable gradation of the finished product, and to meet the requirements of various indicators of the customer's dry-mixed mortar production. At the same time, in order to achieve a dust-free and clean production operation environment, it is also equipped with a DHSC air box pulse bag dust collector.
2. The equipment configuration
PLS1000 special fine sand making machine has two crushing mechanisms: "stone beat stone" and "stone beat iron" by controlling the way of feeding according to different working conditions or crushed materials. "Stone Beat Stone" adopts a waterfall flow distribution system, which divides the material into two channels according to a certain controllable amount. The multiple overflow openings fall into the inner cavity of the device, and the material that enters the inner cavity of the impeller is accelerated from the three or more launch ports by the high-speed rotation of the impeller. "Stone beat iron" refers to the introduction of high-speed rotating impeller cavity from the central feed tube, which is thrown from three or more launch ports after accelerated by the impeller high-speed rotation, and the formation of broken stone. The finished product has good particle shape, stable particle size, low equipment cost and simple maintenance.
NHXA series powder separator is the key equipment to ensure the quality of sand in the dry sand making process. It is mainly composed of speed-regulating motor, fan, cyclone, powder selection room, spreading disc and main air inlet pipe. This machine can adjust the amount of fine particles in the sand by speed regulation. The higher the speed, the more fine particles are selected, and the smaller the powder content in the sand. On the contrary, the powder content in the sand becomes larger. It is very convenient to control the content of stone powder in machine-made sand to meet the different needs of customers.
DHSC air box pulse bag dust collector is our company combined with domestic and foreign dust collection technology, and according to the domestic dry sand aggregate production status, after repeatedly comparing the advantages and disadvantages of various types of bag dust collectors, optimized design The developed gravel aggregate system generally uses high-efficiency dust collectors, and can also be widely applied to the ventilation and dust removal of other building materials, machinery, light industry, rubber and other industrial and mining enterprises, which has a good effect on improving the environment and preventing atmospheric pollution. The dust collector has made great progress in the purification of dust-containing gas and its structure, mainly composed of gas storage tank, filter bag, upper box, lower box, screw conveyor and other parts. It is suitable for dust removal in high-density dust environment. When the dust concentration is less than 1000g / m, it can be directly processed. It is also particularly suitable for high-temperature and high-humidity dust-containing gas environment.
Floor type sand making system has obvious advantages in environmental protection, land occupation and energy efficiency. There are two problems that need to be solved in the production of the floor-type sand making system: one is the classification of powder, the materials in the crushed product are sorted out and adjusted at the same time, if the classification of this part of the material cannot be solved well, It will lead to a reduction in production capacity and affect the regulation of fineness modulus; the second is the return to crushing, and the unqualified materials are returned to the sand machine for crushing again, which is a core link of grading adjustment.
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