CN102930908A - Method for manufacturing lead-free plant fiber protecting plate - Google Patents

Abstract

The invention discloses a method for manufacturing a lead-free plant fiber protecting plate, and relates to a method for manufacturing a radiation-proof plate. The method comprises the following steps of: (1) adding the following raw materials in part by weight: 70-75 parts of barite, 10-15 parts of plant fibers, 3-7 parts of cement, 1 part of high-efficiency rare earth materials, 3-5 parts of silicon dioxide powder, 0.1-1.2 parts of adsorbent and 5-10 parts of water; (2) mixing the raw materials and stirring the raw materials into slurry by a stirring machine; (3) forming the slurry, processing the slurry into a plate, placing the plate on an oil press with the pressure of 10-1000 tons per square meter, and squeezing out water of the plate; and (4) conveying the plate without water into a still kettle, and performing steam-curing, shaping and solidifying on the plate at the temperature of 60-180 DEG C so as to obtain a finished product. The product produced by the method is a substitute product of a radiation shielding material made of lead; and the problem that a radiation shielding product made of lead is harmful to human bodies is solved.

Description

The manufacture method of unleaded vegetable fibre protective shield

Technical field

The present invention relates to the manufacture method of radiation proof sheet material.

Background technology

As everyone knows, human use's radiomaterial is obtained huge interests and wealth.Such as utilizing X, gamma ray to do personal diaphany diagnosis, utilize uranium 225 nuclear fission generatings etc.For to alleviate harm ray to the harm of human body, scientist finds that lead is best radiation proof material simultaneously, and lead was successfully continued to use more than 100 year as radiation proof material.In recent years the plumbous murder by poisoning that causes causes that the mankind generally pay attention to.

Lead is the canescence metal, contacts generation massicot with oxygen in air, is graininess, can spread with the wind.

In the environment of lead dust was arranged, lead dust was sucked in the respiratory tract by human body, with carbon dioxide solubility and be rapidly absorbed, was deposited in the internal organs such as lung and liver kidney, and lead poisoning is difficult to reverse to the grievous injury of human organ and each system.

Nowadays, people also use plumbous and plumbous derivants are done the radiation-resistant glass thing a large amount of, and these are with plumbous place of doing protection, and majority is the public place, and long-term work personnel's urgent need therein will a kind of unleaded, nontoxic environment.

Summary of the invention

The invention provides a kind of manufacture method of unleaded vegetable fibre protective shield, the product that the present invention produces is the substitute products with the plumbous radiation protection material of doing, and has solved with the plumbous problem that the radiation product works the mischief to human body of protecting of doing.

For addressing the above problem, the present invention adopts following technical scheme: in accordance with the following steps operation:

(1) selects raw material according to following ratio of weight and number: barite 60-75, vegetable fibre 10-15, cement 3-7, efficient rare-earth material 1, SiO 2 powder 3-5, adsorbent 0.1-1.2, water 5-10;

Barium sulfate content is 85-96% in the described barite;

Described vegetable fibre is paper pulp;

Described efficient rare-earth material is the rare earth stone flour that contains magnalium;

(2) above-mentioned material is mixed, and break into slurry with stirring machine;

(3) above-mentioned slurry is carried out processing and forming and makes sheet material, and be placed on the oil press and squeeze the water out, the pressure of oil press be the 10-1000 ton/square metre;

(4) sheet material that will extrude moisture content is delivered in the still kettle, solidifies by steaming and molding under 60-180 ℃ of temperature, namely makes finished product.

The present invention is the job operation of the plant fiber decorative sheet take barium sulphate as main supplement.The unleaded vegetable fibre protective shield that the present invention produces, it is good to have flatness, and intensity is high, the advantage that density is large.This unleaded vegetable fibre protective shield is splendid to the barrier propterty of harm ray, can reach the 0.1mmPb lead equivalent by detecting this unleaded vegetable fibre protective shield to the shielding of X ray, shielding to Ce 137 reaches 0.12mmPb than lead equivalent, the shielding of Co 60 is reached 0.15mmPb compare lead equivalent.The protective materials of the replacement stereotype that the unleaded vegetable fibre protective shield that the present invention produces is a high-quality, and cost only is 1/5 to 1/3 of stereotype.

Embodiment

The manufacture method of unleaded vegetable fibre protective shield, in accordance with the following steps operation:

(1) selects raw material according to following ratio of weight and number: barite 72, vegetable fibre 12, cement 4, efficient rare-earth material 1, SiO 2 powder 4, adsorbent 0.3, water 6.7;

Barium sulfate content is 85-96% in the described barite;

Described vegetable fibre is paper pulp; The water cut of paper pulp is 20-95%.

Described efficient rare-earth material is the rare earth stone flour that contains magnalium;

Described adsorbent is silica gel, aluminium oxide, silicon dioxide or natural clay.

(2) above-mentioned material is mixed, and break into slurry with stirring machine;

(3) above-mentioned slurry evenly is sprayed onto processing and forming on the vacuum roller, makes the flexible sheet of required specification and thickness; Above sheet material opened with the steel padding lattice be divided into fritter sheet material, every pile of 30-80 opens fritter sheet material and is placed on the oil press and squeezes the water out, and the pressure of oil press is 100 tons/square metre;

(4) the fritter sheet material that will extrude moisture content is delivered in the still kettle, solidifies by steaming and molding under 90 ℃ of temperature, namely makes finished product.

It should be noted that at last: obviously, above-described embodiment only is for example of the present invention clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being amplified out thus or change still are among protection scope of the present invention.

Claims (1)

1. the manufacture method of unleaded vegetable fibre protective shield is characterized in that, in accordance with the following steps operation:

(1) selects raw material according to following ratio of weight and number: barite 70-75, vegetable fibre 10-15, cement 3-7, efficient rare-earth material 1, SiO 2 powder 3-5, adsorbent 0.1-1.2, water 5-10;

Barium sulfate content is 85-96% in the described barite;

Described vegetable fibre is paper pulp;

Described efficient rare-earth material is the rare earth stone flour that contains magnalium;

(2) above-mentioned material is mixed, and break into slurry with stirring machine;

(3) above-mentioned slurry is carried out processing and forming and makes sheet material, and be placed on the oil press and squeeze the water out, the pressure of oil press be the 10-1000 ton/square metre;

(4) sheet material that will extrude moisture content is delivered in the still kettle, solidifies by steaming and molding under 60-180 ℃ of temperature, namely makes finished product.