SU1767179A1 - Method for production of gangue materials - Google Patents

Abstract

The invention relates to the production of non-metallic materials and can be used in the mining and building materials industries. The purpose of the invention is to reduce the cost of crushed stone production by reducing the operations of the technological cycle while reducing environmental pollution. An array of rock is destroyed by explosive charges of 1.0-4.0 kg / m. Then, primary crushing and primary screening are performed and a fraction of 0-70 mm (20-40 mm, 40-70 mm and sand-crushed stone) is produced. th mixture). The fraction above 70 mm is crushed again and after the secondary screening they produce fractions of 0-5 mm, 5-10 mm and 10-20 mm. 2 hp f-ly.

Description

The invention relates to methods for producing non-metallic materials and can be used in the mining and building materials industries.

The aim of the invention is to reduce the cost of production of rubble by reducing the operations of the technological cycle while reducing environmental pollution.

The method is carried out as follows.

In a quarry, the destruction of a rock is produced by wellbore charges with a specific explosive consumption of 1.0–4.0 kg / m of rock in a dense body, depending on the rock strength, fracturing and type of explosive. In this case, fine and deep crushing of the rock is achieved, and the mechanical properties change in the direction of its softening. Then the rock mass is subjected to primary crushing and primary screening, as a result of which fractions of 0–70 mm (20–40, 40–70 mm and sand-crushed-stone mixture) are released. These fractions are contaminated with clay and dust particles, therefore, it is intended for bases and surfaces of roads and for the ballast layer of the iron-harvesting cloth.

After the initial screening, the 70 mm thick fraction cleared from contamination is fed to the secondary crushing, after which the secondary screening is carried out with the release of a fraction of 0-20 mm (0-5, 5-10, 10-20 mm). These high quality crushed stone fractions are designed for concrete and construction work.

High quality crushed stone; This is due to the formation of new surfaces during secondary crushing, and the newly formed dust particles are removed by vibrating dusting through an aspiration system. Therefore, the washing and dewatering of these fractions is not required.

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The proposed method is more effective, because allows using explosive energy at its low cost to achieve a high degree of crushing and softening of the rock. As a result, the costs of mechanical crushing and screening are significantly reduced, equipment productivity is increased, and economically harmful and costly rubble is eliminated.

Claims (3)

Claim 1. Method for the production of non-metallic materials, including the destruction of an array by blasting explosive charges, excavation, primary and secondary crushing and screening, production of commodity fractions, characterized in that, in order to reduce the cost of crushed stone production by reducing technological cycle operations while environmental pollution, destruction of the massif produced by explosives of 1.0-4.0 kg / m, after the initial screening fractions of 0-70 mm are released, and the fraction above 70 mm is crushed again, and after the secondary core bloody out solid fraction of 0-20 mm. 2. The method according to claim 1, of which is that after the initial screening, fractions of 20-40 mm, 40-70 mm and sand-crushed-stone mixture are produced. 3. A method according to claim 1, characterized in that after the secondary screening, fractions of 0-5 mm, 5-10 mm and 10-20 mm are released.